UI + Procedural Geometry

Runtime/Graphs/GraphWalker.cs

@@ -0,0 +1,89 @@
+using System.Collections;
+using System.Collections.Generic;
+using System;
+
+namespace Rokojori
+{
+  public abstract class GraphWalker<N> where N:class
+  {
+    public virtual int NumConnectedFrom( N node ){ return 0;}
+    public virtual N GetConnectedFrom( N node, int index ){ return default(N);}
+
+    public abstract int NumConnectedTo( N node );
+    public abstract N GetConnectedTo( N node, int index );
+
+    public int NumConnectedAll( N node )
+    {
+      return NumConnectedTo( node ) + NumConnectedFrom( node );
+    }
+
+    public N GetConnected( N node, int index )
+    {
+      var fromConnections = NumConnectedFrom( node );
+
+      return index < fromConnections ? GetConnectedFrom( node, index ) : GetConnectedTo( node, index - fromConnections );
+    }
+
+
+    public bool IsConnectedTo( N source, N destination )
+    {
+      var processed = new HashSet<N>();
+      var toDo = new List<N>();
+
+      toDo.Add( source );
+
+      while ( toDo.Count > 0 )
+      {
+        var current = Lists.RemoveFirst( toDo );
+        
+        if ( processed.Contains( current ) )
+        {
+          continue;
+        }
+
+        processed.Add( current );
+
+        var numConnected = NumConnectedTo( current );
+        
+        for ( int i = 0; i < numConnected; i++ )
+        {
+          var connected = GetConnected( current, i );
+          
+          if ( connected == destination )
+          {
+            return true;
+          }
+
+          if ( ! processed.Contains( connected ) )
+          {
+            toDo.Add( connected );
+          }
+        }
+      }
+
+      return false;
+    }
+
+    
+
+    public bool IsDirectlyConnectedTo( N node, N other )
+    {
+      if ( node == null || other == null )
+      {
+        return false;
+      }
+
+      var connected = NumConnectedTo( node );
+
+      for ( int i = 0; i < connected; i++ )
+      {
+        if ( GetConnected( node, i ) == other ) 
+        {
+          return true;
+        }
+      }
+
+      return false;
+    }
+  }
+}

Runtime/Graphs/Trees/TreeWalker.cs

@@ -240,7 +240,7 @@ namespace Rokojori
       return NextNonChild( node );
     }
 
-    public N GetParent( N node, Func<N,bool> predicate )
+    public N GetInParents( N node, Func<N,bool> predicate )
     {
       var p = Parent( node );
 

Runtime/Logging/RJLog.cs

@@ -42,6 +42,13 @@ namespace Rokojori
       GD.PrintRich( trace );
     }
 
+    static void LogMessageWithFullTrace( string message )
+    {
+      var trace = GetFullTrace();
+      GD.PrintRich("\n[b]" +  message + "[/b]");
+      GD.PrintRich( trace );
+    }
+
     static void LogErrorMessage( string message )
     {
       var trace = GetTrace();
@@ -49,6 +56,11 @@ namespace Rokojori
       GD.PrintRich( trace );
     }
 
+    static string GetFullTrace()
+    {
+      return ( new System.Diagnostics.StackTrace( true ) ).ToString();
+    }
+
     static string GetTrace()
     {
       var stackTrace = new System.Diagnostics.StackTrace( true );
@@ -86,6 +98,23 @@ namespace Rokojori
       return "[color=gray]  " + trace + "[/color]" ;
     }
 
+    public static void LogWithFullTrace( params object[] objects)
+    {
+      var sb = new StringBuilder();
+
+      for ( int i = 0; i < objects.Length; i++ )
+      {
+        if ( i != 0 )
+        {
+          sb.Append( " " ); 
+        }
+
+        Stringify( objects[ i ], sb );
+      }
+
+      LogMessageWithFullTrace( sb.ToString() );
+    }
+
     public static void Log( params object[] objects)
     {
       var sb = new StringBuilder();

Runtime/Math/Geometry/Capsule3.cs

@@ -0,0 +1,44 @@
+using Godot;
+using System.Collections;
+using System.Collections.Generic;
+
+namespace Rokojori
+{
+	public class Capsule3
+	{
+    public Vector3 start = Vector3.Zero;
+    public Vector3 end = Vector3.Zero;
+    public float radius = 1;
+
+    public Capsule3( Vector3 start, Vector3 end, float radius )
+    {
+      this.start = start;
+      this.end = end;
+      this.radius = radius;
+    }    
+
+    public Capsule3 Copy()
+    {
+      return new Capsule3( start, end, radius );
+    }
+
+    public Vector3 center
+    {
+      get { return start.Lerp( end, 0.5f ); }
+    }
+
+    public Line3 centerLine
+    {
+      get { return new Line3( start, end ); }
+    }
+
+    public float DistanceToPoint( Vector3 p )
+    {
+      var lineDistance = centerLine.DistanceToPoint( p );
+      return Mathf.Max( 0, lineDistance - radius );
+    } 
+
+
+	}
+}
+

Runtime/Math/Geometry/Curve3.cs

@@ -0,0 +1,77 @@
+using Godot;
+using System.Collections;
+using System.Collections.Generic;
+
+namespace Rokojori
+{
+	public abstract class Curve3
+	{
+    float _gradientSamplingRange = Mathf.Pow( 10f, -13f );
+    public abstract Vector3 SampleAt( float t );
+    
+    public virtual void SampleMultiple( int numSamples, List<Vector3> output )
+    {
+      SampleMultiple( new Range( 0, 1 ), numSamples, output );
+    }
+    
+    public virtual void SampleMultiple( Range range, int numSamples, List<Vector3> output )
+    {
+
+      var diff = range.length / ( numSamples - 1 ) ;
+      
+      for ( var i = 0 ; i < numSamples; i++ )
+      {
+        var t = range.min + i * diff;
+        output.Add( SampleAt( t ) );
+      }
+    }
+
+    public virtual Vector3 GradientAt( float t )
+    {
+
+      return SampleAt( t + _gradientSamplingRange ) - SampleAt( t - _gradientSamplingRange );
+    }
+
+    public virtual float ComputeLength( int numSamples )
+    {
+      return ComputeSubLength( Range.Of_01 , numSamples );
+    }    
+
+    public virtual float ComputeSubLength( Range range, int numSamples )
+    {
+      var diff = range.length / ( numSamples - 1 ) ;
+      var it = SampleAt( range.min );
+      var length = 0f;
+
+      for ( var i = 1 ; i < numSamples; i++ )
+      {
+        var t = range.min + i * diff;
+        var next = SampleAt( t );
+        length += ( next - it ).Length();
+        it = next;
+      }
+
+      return length;
+    }
+    
+    public virtual int ComputeNumSamplesFor( Range range,
+    float minimumDistance, int minSamples = 2, 
+    int numSamplesForLengthComputation = -1 )
+    {
+      if ( minSamples < 2 )
+      { minSamples = 2; }
+      
+      if ( numSamplesForLengthComputation <= 0  )
+      { numSamplesForLengthComputation = minSamples * 4; }
+
+      float distance = ComputeSubLength( range, numSamplesForLengthComputation );
+      float numFloatingCuts = distance / minimumDistance;
+      int numSamples = Mathf.CeilToInt( numFloatingCuts );
+
+      return Mathf.Max( minSamples, numSamples );
+    }
+
+        
+        
+  }
+}

Runtime/Math/Geometry/Distance3.cs

@@ -0,0 +1,117 @@
+using Godot;
+using System.Collections;
+using System.Collections.Generic;
+
+namespace Rokojori
+{
+	public class Distance
+	{
+    
+    /*
+    
+    P = Point, 
+    S = Sphere
+    L = Line,
+    C = Capsule
+
+    
+      P S L C   
+    P y y y y   
+    S   y y y      
+    L     y y      
+    C       y  
+
+    */
+
+    public static float Of( Vector3 a, Vector3 b )
+    {
+      return ( a - b ).Length();
+    }    
+
+    public static float Of( Vector3 a, Sphere b )
+    {
+      return b.DistanceToPoint( a );
+    }
+
+    public static float Of( Sphere a, Vector3 b )
+    {
+      return Of( b, a );
+    }
+
+    public static float Of( Vector3 a, Line3 b )
+    {
+      return b.DistanceToPoint( a );
+    }
+
+    public static float Of( Line3 b, Vector3 a )
+    {
+      return Of( a, b );
+    }
+
+    public static float Of( Vector3 a, Capsule3 b )
+    {
+      return b.DistanceToPoint( a );
+    }
+    
+    public static float Of( Capsule3 a, Vector3 b )
+    {
+      return Of( b, a );
+    }
+
+    public static float Of( Sphere a, Sphere b )
+    {
+      return a.DistanceToSphere( b );
+    }
+
+    public static float Of( Sphere a, Line3 b )
+    {
+      var centerDistance = Of( a.center, b );
+      return Mathf.Max( centerDistance - a.radius, 0 ); 
+    } 
+
+    public static float Of( Line3 a, Sphere b )
+    {
+      return Of( b, a );
+    }
+
+    public static float Of( Sphere a, Capsule3 b )
+    {
+      var centerDistance = Of( a.center, b );
+      return Mathf.Max( centerDistance - a.radius, 0 ); 
+    }
+
+    public static float Of( Capsule3 a, Sphere b )
+    {
+      return Of( b, a );
+    }
+
+    public static float Of( Line3 a, Line3 b )
+    {
+      return a.DistanceToLine( b );
+    }
+
+    public static float Of( Line3 a, Capsule3 b )
+    {
+      var lineDistance = Of( a, b.centerLine );
+      return Mathf.Max( 0, lineDistance - b.radius );
+    }
+
+    public static float Of( Capsule3 a, Line3 b )
+    {
+      return Of( b, a );
+    }
+
+    public static float Of( Capsule3 a, Capsule3 b )
+    {
+      var lineDistance = Of( a.centerLine, b.centerLine );
+      return Mathf.Max( 0, lineDistance - ( a.radius + b.radius ) );
+    }
+    
+    
+
+    
+
+
+  }
+}
+

Runtime/Math/Geometry/LerpCurve3.cs

@@ -0,0 +1,249 @@
+using System.Collections;
+using System.Collections.Generic;
+using Godot;
+
+
+namespace Rokojori
+{
+
+  public class SubdivisionData
+  {
+    public Vector3 point;
+    public bool isCorner;
+    public Vector3 direction;
+
+    public SubdivisionData( Vector3 p, Vector3 d, bool corner = false )
+    {
+      point = p;
+      direction = d;
+      isCorner = corner;
+    }
+
+  }
+
+  public class LerpCurveClosestToPointResult
+  {
+    public float parameter;
+    public float distance;
+    public Vector3 point;
+  }
+
+	public class LerpCurve3:Curve3
+	{
+    List<Vector3> list;
+    
+    public LerpCurve3( List<Vector3> list )
+    {
+      this.list = list;
+      
+      if ( list.Count == 0 )
+      {
+        RJLog.Log( "LERP CURVE WITH EMPTY LIST" );
+      }
+    }
+
+    public override float ComputeLength( int numSamples )
+    {
+      var length = 0f;
+      var end = list.Count - 1;
+
+      for ( int i = 0; i < end; i++ )
+      {
+        var p0  = list[ i ];
+        var p1  = list[ i + 1 ];
+
+        length += p0.DistanceTo( p1 );
+      }
+
+      return length;
+    }
+
+    public float UndistortParameter( float parameter )
+    {
+      var completeLength = ComputeLength( 0 );
+
+      var end = list.Count - 1;
+      var normalizer = 1f / ( list.Count - 1 );
+
+      var length = 0f;
+
+      for ( int i = 0; i < end; i++ )
+      {
+        var p0  = list[ i ];
+        var p1  = list[ i + 1 ];
+        var t0  = i * normalizer;
+        var t1  = ( i + 1 ) * normalizer;
+        var distance = p0.DistanceTo( p1 );
+
+        if ( t0 <= parameter && parameter <= t1 )
+        {
+          length += distance * ( parameter - t0 ); 
+          return length / completeLength;
+        }
+
+        length += distance;
+
+      }
+
+      return 1;
+
+    }
+
+    public List<SubdivisionData> Subdivide( float distance, bool close )
+    {
+      var output = new List<SubdivisionData>();
+
+      var num = list.Count - 1;
+
+      if ( close )
+      {
+        num ++;
+      }
+
+      for ( var i = 0; i < num; i++ )
+      {
+        var start = list[ i ];
+        var end   = list[ i == list.Count ? 0 : i + 1 ];
+
+        var dir = ( end - start );
+        var length = dir.Length();
+        var samples = Mathf.CeilToInt( length / distance );
+
+        output.Add( new SubdivisionData( start, dir, true ) );
+
+        for ( int j = 1; j < samples; j++ )
+        {
+          var samplePoint = j / (float) samples;
+          var point = start.Lerp( end, samplePoint );
+          output.Add( new SubdivisionData( point, dir ) );
+        }
+        
+      }
+      
+
+      if ( ! close )
+      {
+        var start = list[ list.Count - 2];
+        var end   = list[ list.Count - 1];
+
+        var dir = ( end - start );
+
+        output.Add( new SubdivisionData( end, dir, true ) );
+        
+      }
+
+
+      var dirCount = close ? output.Count : ( output.Count - 1 );
+
+      for ( int i = 0; i < dirCount; i++ )
+      {
+        var next = i == output.Count ? 0 : i + 1;
+        output[ i ].direction = output[ next ].point - output[ i ].point;
+      }
+      
+
+      
+
+      return output;
+    }
+
+    public override Vector3 SampleAt( float t )
+    {
+      if ( t < 0 )
+      {
+        return list[ 0 ];
+      }
+      
+      if ( t >= 1 )
+      {
+        return list[ list.Count - 1 ];
+      }
+
+      if ( list.Count == 1 )
+      {
+        return list[ 0 ];
+      }
+
+    
+
+      var listIndex = t * ( list.Count - 1 );
+      var flooredIndex = (int) Mathf.Floor( listIndex );
+
+      var lerpAmount = listIndex - flooredIndex;
+
+      if ( flooredIndex < 0 ||  ( flooredIndex >= list.Count - 1 ) )
+      {
+        RJLog.Log( "Out of range index:",flooredIndex, " t:", t, " listIndex", listIndex, "Count:", list.Count );
+      }
+
+      var lower = list[ flooredIndex ];
+      var upper = list[ flooredIndex + 1 ];
+
+      return Math3D.LerpUnclamped( lower, upper, lerpAmount );
+      
+    }
+
+    public LerpCurve3 FromRange( Curve3 curve, Range range, int numSamples )
+    {
+      var points = new List<Vector3>();
+      curve.SampleMultiple( range, numSamples, points );
+      return new LerpCurve3( points );
+    }
+
+    public LerpCurve3 From( Curve3 curve, int numSamples )
+    {
+      return FromRange( curve, Range.Of_01, numSamples );
+    }
+
+    public static LerpCurve3 FromPoints( Vector3 first, Vector3 second, params Vector3[] others )
+    {
+      var points = new List<Vector3>();
+      points.Add( first );
+      points.Add( second );
+      points.AddRange( others );
+
+      return new LerpCurve3( points );
+    }
+
+    Line3 line;
+
+    public void GetClosest( Vector3 point, LerpCurveClosestToPointResult result )
+    {
+      var closestDistance = float.MaxValue;
+      Vector3 closestPoint    = Vector3.Zero; 
+      var closestParameter  = 0f;
+
+      if ( line == null )
+      {
+        line = new Line3( Vector3.Zero, Vector3.Zero );
+      }
+
+      var end = list.Count - 1;
+      
+      var parameterNormalizer = 1f / ( list.Count - 1f );
+
+      for ( int i = 0; i < end; i++ )
+      {        
+        line.start = list[ i ];
+        line.end   = list[ i + 1 ];
+
+        var currentParameter = line.ClostestParameterToPoint( point );
+        var currentClosestPoint = line.GetPointAtParameter( currentParameter );
+        var currentDistance = ( point - currentClosestPoint ).LengthSquared();
+
+        if ( currentDistance < closestDistance )
+        {
+          closestDistance = currentDistance;
+          closestPoint = currentClosestPoint;
+          closestParameter = ( currentParameter + i ) * parameterNormalizer;
+        }
+      }
+
+      result.distance = Mathf.Sqrt( closestDistance );
+      result.point = closestPoint;
+      result.parameter = closestParameter;
+
+    }
+        
+  }
+}

Runtime/Math/Geometry/Line3.cs

@@ -0,0 +1,198 @@
+using Godot;
+using System.Collections;
+using System.Collections.Generic;
+
+namespace Rokojori
+{
+  public class Line3:Curve3
+  {
+    public Vector3 start = Vector3.Zero;
+    public Vector3 end = Vector3.Zero;
+
+    public Line3( Vector3 start, Vector3 end )
+    {
+      this.start = start;
+      this.end = end;
+    } 
+
+    public override Vector3 SampleAt( float t )
+    {
+      return start.Lerp( end, t );
+    }
+
+    public Line3 Copy( )
+    {
+      return new Line3( start, end );
+    }
+
+    public Vector3 direction { get { return end - start; } }
+
+    public float length { get { return direction.Length();  } }
+    
+    public Vector3 GetPointAtParameter( float t )
+    {
+      return start + direction * t;
+    }
+
+    public Vector3 center{ get { return ( start + end ) * 0.5f; } }
+
+    public Line3 ScaleFromCenter( float scale )
+    {
+      var lineCenter = center;
+      var halfDirection = direction * ( 0.5f * scale );
+
+      var scaledStart = lineCenter - halfDirection;
+      var scaledEnd   = lineCenter + halfDirection;
+
+      return new Line3( scaledStart, scaledEnd );  
+    }
+
+    public Line3 ChangeLengthFromCenter( float lengthChange )
+    {
+      var lineCenter = center;
+      var halfDirection = direction * 0.5f;
+      var length = halfDirection.Length();
+      length += lengthChange * 0.5f;
+
+      halfDirection = halfDirection.Normalized() * length;      
+
+      var scaledStart = lineCenter - halfDirection;
+      var scaledEnd   = lineCenter + halfDirection;
+
+      return new Line3( scaledStart, scaledEnd );  
+    }
+
+    public Line3 SetLengthFromCenter( float length )
+    {
+      var lineCenter = center;
+      var halfDirection = direction.Normalized() * ( length * 0.5f );     
+
+      var scaledStart = lineCenter - halfDirection;
+      var scaledEnd   = lineCenter + halfDirection;
+
+      return new Line3( scaledStart, scaledEnd );  
+    }
+    
+     
+    public Vector3 ClosestPointToPoint( Vector3 point )
+    {
+      var parameter = MathX.Clamp01( ClostestParameterToPoint( point ) );
+      return GetPointAtParameter( parameter );
+    }
+
+    public float ClostestParameterToPoint( Vector3 point )
+    {
+      var startP = point - start;
+      var startEnd = end - start;
+      var startEnd2 = startEnd.Dot( startEnd );
+      var startEnd_startP = startEnd.Dot( startP );
+
+      if ( startEnd2 == 0 )
+      {
+        return 0;
+      }
+
+      var t = startEnd_startP / startEnd2;
+
+      return t;
+        
+    }
+
+    public float DistanceToPoint( Vector3 point )
+    {
+      return ( point - ClosestPointToPoint( point ) ).Length();
+    }
+
+
+    public float DistanceToLine( Line3 s )
+    {
+      var points = ClosestPointsToLine( s );
+      return ( points[ 1 ] - points[ 0 ] ).Length();
+    }
+
+    public Vector3[] ClosestPointsToLine( Line3 s )
+    {
+      var parameters = ClosestParametersToLine( s );
+      var x = this.GetPointAtParameter( parameters.X );
+      var y = s.GetPointAtParameter( parameters.Y );
+
+      return new Vector3[]{ x, y };  
+    }
+
+    public Vector2 ClosestParametersToLine( Line3 s )
+    {     
+      float epsilon = 0.00000001f;
+
+      var u = this.direction;
+      var v = s.direction;
+      var w = start - s.start;
+    
+      var a = u.Dot( u );
+      var b = u.Dot( v );
+      var c = v.Dot( v );
+      var d = u.Dot( w );
+      var e = v.Dot( w );
+
+      var DD = a * c - b * b;
+
+      var sc = 0f;
+      var sN = 0f;
+      var sD = 0f;
+
+      var tc = 0f;
+      var tN = 0f;
+      var tD = 0f;
+
+      sD = DD;
+      tD = DD;
+
+      if ( DD < epsilon ) 
+      {
+        sN = 0.0f;
+        sD = 1.0f;
+        tN = e;
+        tD = c;
+      }
+      else
+      {
+        sN = b * e - c * d ;
+        tN = a * e - b * d ;
+
+        if ( sN < 0.0f )
+        {
+          sN = 0.0f;
+          tN = e;
+          tD = c;
+        }
+        else if ( sN > sD ) 
+        {
+          sN = sD;
+          tN = e + b;
+          tD = c;
+        }
+      }
+
+      if ( tN < 0f || tN > tD )
+      {
+        var tN_bigger_tD = tN >= 0f && tN > tD;
+
+        tN = tN_bigger_tD ? tD : 0f;
+
+        var inbetween = tN_bigger_tD ? ( -d + b ) : ( -d );
+        var isSmaller = inbetween < 0;
+        var isBigger  = inbetween > a;
+
+        sN = isSmaller ? 0f : isBigger ? sD : inbetween; 
+        sD = ! isSmaller && ! isBigger ?  a : sD;
+      }
+
+      sc = Mathf.Abs( sN ) < epsilon ? 0f : sN / sD;
+      tc = Mathf.Abs( tN ) < epsilon ? 0f : tN / tD;
+
+      return new Vector2( sc, tc ); 
+
+    }
+
+  }
+}
+

Runtime/Math/Geometry/Sphere.cs

@@ -0,0 +1,53 @@
+using System.Collections;
+using System.Collections.Generic;
+using Godot;
+
+namespace Rokojori
+{
+	public class Sphere
+	{
+    public Vector3 center = Vector3.Zero;
+    public float radius = 1;
+
+    public Sphere( Vector3 center, float radius )
+    {
+      this.center = center;
+      this.radius = radius;
+    }    
+
+    public Sphere Copy()
+    {
+      return new Sphere( center, radius );
+    }
+
+    public float DistanceToPoint( Vector3 point )
+    {
+      return Mathf.Max( 0, ( point - center ).Length() - radius );
+    }
+
+    public bool ContainsPoint( Vector3 point )
+    {
+      return DistanceToPoint( point ) <= 0; 
+    }
+
+    public float DistanceToSphere( Sphere sphere )
+    {
+      var distance = sphere.center - center;
+      var radiusBoth = sphere.radius + radius;
+      return Mathf.Max( 0, distance.Length() - radiusBoth ); 
+    }
+
+    public bool IntersectsSphere( Sphere sphere )
+    {
+      return DistanceToSphere( sphere ) <= 0;
+    }
+
+    public Box3 CreateBox()
+    {
+      var offset = radius * Vector3.One;
+      return Box3.Create( center -offset, center + offset );
+    }
+
+	}
+}
+

Runtime/Math/Geometry/Triangle3.cs

@@ -0,0 +1,96 @@
+using Godot;
+using System.Collections;
+using System.Collections.Generic;
+
+
+namespace Rokojori
+{
+  public enum TriangleSide
+  {
+    AB,
+    BC,
+    CA
+  }
+  
+  public class TriangleSides
+  {
+    public static readonly TriangleSide[] ALL = 
+    {
+      TriangleSide.AB,
+      TriangleSide.BC,
+      TriangleSide.CA
+    };
+  }
+
+  public class Triangle3
+  {   
+    public Vector3 a;
+    public Vector3 b;
+    public Vector3 c;
+
+    public Triangle3( Vector3 a, Vector3 b, Vector3 c )
+    {
+      this.a = a;
+      this.b = b;
+      this.c = c;
+    }
+
+    public float perimeter
+    {
+      get
+      {
+        var sideA = ( b - a ).Length();
+        var sideB = ( c - b ).Length();
+        var sideC = ( a - c ).Length();
+      
+        return sideA + sideB + sideC;
+      }
+    }
+
+    public float semiperimeter
+    {
+      get
+      {
+        return perimeter * 0.5f;
+      }
+    }
+
+    public static float ComputeTriangleArea( Vector3 a, Vector3 b, Vector3 c )
+    {
+      var sideA = ( b - a ).Length();
+      var sideB = ( c - b ).Length();
+      var sideC = ( a - c ).Length();
+    
+
+      var perimeter = sideA + sideB + sideC;
+      var semiperimeter = 0.5f * perimeter;
+      var areaValue = Mathf.Sqrt( semiperimeter * ( semiperimeter - sideA ) 
+                                                * ( semiperimeter - sideB ) 
+                                                * ( semiperimeter - sideC )) ;
+
+      return areaValue;   
+    }
+
+    public float area
+    {
+      get
+      {
+        return ComputeTriangleArea( a, b, c );
+      }     
+    }
+
+
+    public Line3 GetSide( TriangleSide side )
+    { 
+      switch ( side )
+      {
+        case TriangleSide.AB: return new Line3( a, b );
+        case TriangleSide.BC: return new Line3( b, c  );
+        case TriangleSide.CA: return new Line3( c, a );
+      }
+
+      return null;
+    }
+  }
+
+}

Runtime/Math/Math3D.cs

@@ -8,6 +8,16 @@ namespace Rokojori
 {
   public class Math3D
   {
+    public static Vector3 LerpUnclamped( Vector3 a, Vector3 b, float amount )
+    {
+      return a + amount * ( b - a );
+    }
+
+    public static Vector3 LerpClamped( Vector3 a, Vector3 b, float amount )
+    {
+      return LerpUnclamped( a, b, MathX.Clamp01( amount ) );
+    }
+
     public static Quaternion GetGlobalRotation( Node3D node )
     {
       return node.GlobalBasis.GetRotationQuaternion();

Runtime/Math/RationalCubicBezier.cs

@@ -0,0 +1,104 @@
+using System.Collections;
+using System.Collections.Generic;
+using Godot;
+
+namespace Rokojori
+{
+
+  public class RationalCubicBezier
+  {
+    public static float Compute(
+      float t, 
+      float p0, float p1, float p2, float p3, 
+      float w0, float w1, float w2, float w3
+    )
+    {
+      var bp0 = ( 1 - t ) * ( 1 - t ) * ( 1 - t ) * w0;
+      var bp1 = 3 * ( 1 - t ) * ( 1 - t ) * t * w1;
+      var bp2 = 3 * ( 1 - t ) * t * t * w2;
+      var bp3 = t * t * t * w3;
+
+      var weighted = p0 * bp0 + p1 * bp1 + p2 * bp2 + p3 * bp3;
+
+      var projection = bp0 + bp1 + bp2 + bp3;
+
+      return weighted / projection;
+    }
+
+    public static Vector2 Compute(
+      float t, 
+      Vector2 p0, Vector2 p1, Vector2 p2, Vector2 p3, 
+      float w0, float w1, float w2, float w3
+    )
+    {
+      var bp0 = ( 1 - t ) * ( 1 - t ) * ( 1 - t ) * w0;
+      var bp1 = 3 * ( 1 - t ) * ( 1 - t ) * t * w1;
+      var bp2 = 3 * ( 1 - t ) * t * t * w2;
+      var bp3 = t * t * t * w3;
+
+      var weighted = p0 * bp0 + p1 * bp1 + p2 * bp2 + p3 * bp3;
+
+      var projection = bp0 + bp1 + bp2 + bp3;
+
+      return weighted / projection;
+    }
+
+    public static Vector3 Compute(
+      float t, 
+      Vector3 p0, Vector3 p1, Vector3 p2, Vector3 p3, 
+      float w0, float w1, float w2, float w3
+    )
+    {
+      var bp0 = ( 1 - t ) * ( 1 - t ) * ( 1 - t ) * w0;
+      var bp1 = 3 * ( 1 - t ) * ( 1 - t ) * t * w1;
+      var bp2 = 3 * ( 1 - t ) * t * t * w2;
+      var bp3 = t * t * t * w3;
+
+      var weighted = p0 * bp0 + p1 * bp1 + p2 * bp2 + p3 * bp3;
+
+      var projection = bp0 + bp1 + bp2 + bp3;
+
+      return weighted / projection;
+    }
+
+
+    public static Vector2 Compute( float t, Vector3 p0, Vector3 p1, Vector3 p2, Vector3 p3 )
+    {
+      var bp0 = ( 1 - t ) * ( 1 - t ) * ( 1 - t ) * p0.Z;
+      var bp1 = 3 * ( 1 - t ) * ( 1 - t ) * t * p1.Z;
+      var bp2 = 3 * ( 1 - t ) * t * t * p2.Z;
+      var bp3 = t * t * t * p3.Z;
+
+      var weighted = p0 * bp0 + p1 * bp1 + p2 * bp2 + p3 * bp3;
+
+      var projection = bp0 + bp1 + bp2 + bp3;
+
+      var result = weighted / projection;
+
+      return new Vector2( result.X, result.Y );
+    }
+
+    public static Vector3 Compute( float t, Vector4 p0, Vector4 p1, Vector4 p2, Vector4 p3 )
+    {
+      var bp0 = ( 1 - t ) * ( 1 - t ) * ( 1 - t ) * p0.W;
+      var bp1 = 3 * ( 1 - t ) * ( 1 - t ) * t * p1.W;
+      var bp2 = 3 * ( 1 - t ) * t * t * p2.W;
+      var bp3 = t * t * t * p3.W;
+
+      var weighted = p0 * bp0 + p1 * bp1 + p2 * bp2 + p3 * bp3;
+
+      var projection = bp0 + bp1 + bp2 + bp3;
+
+      var result = weighted / projection;
+
+      return new Vector3( result.X, result.Y, result.Z );
+    }
+
+
+    
+
+    
+  }
+
+
+}

Runtime/Math/_Unity_To_Godot_.txt

@@ -0,0 +1,20 @@
+Match:   \.magnitude
+Replace: .Length()
+
+Match:   \.normalized
+Replace: .Normalized()
+
+Match:   Vector3\.(Lerp|Dot)\(\s*(\w+)\s*,\s*
+Replace: $2.$1( 
+
+Match:   Vector3\.Distance\(\s*(\w+)\s*,\s*
+Replace: $1.DistanceTo( 
+
+Match:   \.x
+Replace: .X
+
+Match:   \.Y
+Replace: .Y
+
+Match:   \.z
+Replace: .Z

Runtime/Procedural/MeshGeometry.cs

@@ -0,0 +1,138 @@
+using System.Collections;
+using System.Collections.Generic;
+using Godot;
+using System;
+
+
+
+namespace Rokojori
+{
+  public class MeshGeometry
+  {
+    public List<Vector3> vertices;
+    public List<int> indices;
+
+    public List<Vector3> normals;
+    public List<Vector2> uvs;
+    public List<Vector2> uv2s;
+    public List<Color> colors;
+  
+
+    public void Initialize( bool normals = true, bool uvs = true, bool colors = false, bool uvs2 = false)
+    {
+      this.vertices = new List<Vector3>();
+      this.indices = new List<int>();
+      
+      this.normals = normals ? new List<Vector3>() : null;
+      this.uvs = uvs ? new List<Vector2>() : null;
+      this.uv2s = uvs2 ? new List<Vector2>() : null;
+      this.colors = colors ? new List<Color>() : null;      
+    }
+
+    public void AddTriangle( 
+      Vector3 va, Vector3 vb, Vector3 vc, 
+      Vector3 na, Vector3 nb, Vector3 nc,
+      Vector2 uva, Vector2 uvb, Vector2 uvc
+    )
+    {
+      var index = vertices.Count;
+      Lists.Add( vertices, va, vb, vc );
+      Lists.Add( normals, na, nb, nc );
+      Lists.Add( uvs, uva, uvb, uvc );
+      Lists.Add( indices, index, index + 1, index + 2 );
+    }
+
+    public void AddQuad(
+      Vector3 va, Vector3 vb, Vector3 vc, Vector3 vd,
+      Vector3 na, Vector3 nb, Vector3 nc, Vector3 nd, 
+      Vector2 uva, Vector2 uvb, Vector2 uvc, Vector2 uvd
+    )
+    {
+      AddTriangle( va, vb, vc,  na, nb, nc,  uva, uvb, uvc );
+      AddTriangle( vc, vd, va,  nc, nd, na,  uvc, uvd, uva );
+    }
+
+    public void AddTriangle( 
+      Vector3 va, Vector3 vb, Vector3 vc, 
+      Vector2 uva, Vector2 uvb, Vector2 uvc
+    )
+    {
+      var n = Vector3.Up;
+
+      AddTriangle( va, vb, vc, 
+                   n, n, n,
+                   uva, uvb, uvc );
+    }
+
+    public void AddQuad(
+      Vector3 va, Vector3 vb, Vector3 vc, Vector3 vd,
+      Vector2 uva, Vector2 uvb, Vector2 uvc, Vector2 uvd
+    )
+    {
+
+      AddTriangle( va, vb, vc, uva, uvb, uvc );
+      AddTriangle( vc, vd, va, uvc, uvd, uva );
+    }
+
+    public void AddTriangle( Vector3 va, Vector3 vb, Vector3 vc )    
+    {
+      var n  = Vector3.Up;
+      var uv = Vector2.Zero;
+
+      AddTriangle( va, vb, vc,  n, n, n, uv, uv, uv );
+    }
+
+    public void AddQuad(  Vector3 va, Vector3 vb, Vector3 vc, Vector3 vd  )
+    {
+      AddTriangle( va, vb, vc );
+      AddTriangle( vc, vd, va );
+    }
+
+
+    public ArrayMesh Generate( Mesh.PrimitiveType type = Mesh.PrimitiveType.Triangles, ArrayMesh arrayMesh = null )
+    {
+      if ( arrayMesh == null )
+      {
+        arrayMesh = new ArrayMesh();
+      }
+
+      var surfaceArray = new Godot.Collections.Array();
+      surfaceArray.Resize( (int) Mesh.ArrayType.Max );
+
+      if ( vertices != null )
+      {
+        surfaceArray[ (int) Mesh.ArrayType.Vertex ] = vertices.ToArray();
+      }
+
+      if ( normals != null )
+      {
+        surfaceArray[ (int) Mesh.ArrayType.Normal ] = normals.ToArray();
+      }
+
+      if ( uvs != null )
+      {
+        surfaceArray[ (int) Mesh.ArrayType.TexUV ] = uvs.ToArray();
+      }
+
+      if ( uv2s != null )
+      {
+        surfaceArray[ (int) Mesh.ArrayType.TexUV2 ] = uv2s.ToArray();
+      }
+
+      if ( colors != null )
+      {
+        surfaceArray[ (int) Mesh.ArrayType.Color ] = colors.ToArray();
+      }
+
+      if ( indices != null )
+      {
+        surfaceArray[ (int) Mesh.ArrayType.Index ] = indices.ToArray();
+      }
+
+      arrayMesh.AddSurfaceFromArrays( Mesh.PrimitiveType.Triangles, surfaceArray );
+
+      return arrayMesh;
+    }
+
+  }
+}

Runtime/Random/RandomEngine.cs

@@ -7,7 +7,7 @@ using System;
 
 namespace Rokojori
 {
-   public abstract class RandomEngine
+  public abstract class RandomEngine
   {
     public abstract float Next();
         
@@ -208,6 +208,106 @@ namespace Rokojori
       
       return list[ index ];
     }
+
+    public T RemoveFrom<T>( List<T> list )
+    {
+      if ( list.Count == 0 )
+      {
+        return default ( T );
+      }
+
+      var index = this.IntegerExclusive( 0, list.Count );
+      
+      var item = list[ index ];
+
+      list.RemoveAt( index );
+      return item;  
+    }
+
+    public List<T> RemoveMutlipleFrom<T>( List<T> list, int amount )
+    {
+      if ( amount >= list.Count )
+      {
+        return list;
+      }
+      
+      var items = new List<T>();
+
+      for ( int i = 0; i < amount; i++ )
+      {
+        var itemIndex = this.IntegerExclusive( 0, list.Count );
+        var item = list[ itemIndex ];
+        list.RemoveAt( itemIndex );
+        items.Add( item );
+      }      
+
+      return items;
+    }
+
+    public T RemoveWeightedFrom<T>( List<T> list, List<float> weights )
+    {
+      if ( list == null || list.Count == 0 )
+      {
+        return default(T);
+      }
+
+      if ( list.Count == 1 )
+      {
+        return list[ 0 ];
+      }
+
+      var weightedSelection = RemoveMultipleWeightedFrom( list, weights, 1 );
+
+
+      return weightedSelection[ 0 ];
+    }
+
+    public List<T> RemoveMultipleWeightedFrom<T>( List<T> list, List<float> weights, int amount )
+    {
+      if ( amount >= list.Count )
+      {
+        return list;
+      }
+
+      var sumWeights = 0f;
+
+      weights.ForEach( w => sumWeights += w );
+
+      var selection = new List<T>();
+
+      for ( int i = 0; i < amount; i++ )
+      {
+        var number = Range( 0, sumWeights );
+
+        var index = _FindElementIndexWithWeights( weights, Range( 0, sumWeights ) );
+        var element = list[ index ];
+        var weight = weights[ index ];
+        list.RemoveAt( index );
+        sumWeights -= weight;
+        selection.Add( element );
+      } 
+
+      return selection;
+    }
+
+    int _FindElementIndexWithWeights( List<float> weights, float value )
+    {
+      var limit = 0f;
+
+      for ( int i = 0; i < weights.Count; i++ )
+      {
+        var before = limit;
+        limit += weights[ i ];
+
+        if ( before <= value && value < limit )
+        {
+          return i;
+        }
+      }
+
+      return weights.Count - 1;
+    }
+
   }
 
   public abstract class SeedableRandomEngine:RandomEngine

Runtime/Shading/Library/Transform.gdshaderinc

@@ -0,0 +1,10 @@
+
+vec3 localToWorld( vec3 _VERTEX, mat4 _MODEL_MATRIX )
+{
+  return ( _MODEL_MATRIX * vec4( _VERTEX, 1.0 ) ).xyz;  
+}
+
+vec3 worldToLocal( vec3 _VERTEX, mat4 _MODEL_MATRIX )
+{
+  return ( inverse( _MODEL_MATRIX ) * vec4( _VERTEX, 1.0 ) ).xyz;  
+}

Runtime/Tools/Lists.cs

@@ -36,6 +36,28 @@ namespace Rokojori
       return list.IndexOf( item ) != - 1;
     }
 
+    public static T RemoveAt<T>( List<T> list, int index )
+    {
+      if ( list.Count == 0 || index < 0 ||  ( index > ( list.Count - 1 ) ) )
+      { 
+        return default(T); 
+      }
+
+      var first = list[ index ];
+      list.RemoveAt( index );
+      return first;
+    }
+
+    public static T RemoveFirst<T>( List<T> list )
+    {
+      return RemoveAt( list, 0 );
+    }
+
+    public static T RemoveLast<T>( List<T> list )
+    {
+      return RemoveAt( list, list.Count - 1 );
+    }
+
     public static T Pop<T>( List<T> list )
     {
       if ( list.Count == 0 ){ return default(T); }
@@ -143,6 +165,23 @@ namespace Rokojori
       return copy;
     }
 
+    public static List<U> FilterAndMap<T,U>( List<T> list, Func<T,int,bool> filter, Func<T,U> map)
+    {
+      var mapped = new List<U>();
+      
+      for ( int i = 0; i < list.Count; i++ )
+      {
+        if ( ! filter( list[ i ], i ) )
+        {
+          continue;
+        }
+
+        mapped.Add( map( list[ i ] ) ); 
+      }
+
+      return mapped;
+    } 
+
     public static void Filter<T>( List<T> inputList, List<T> list, Func<T,int,bool> filter )
     {      
       for ( int i = 0; i < inputList.Count; i++ )
@@ -164,7 +203,7 @@ namespace Rokojori
         }
       }
     }
-
+    
     public static List<T> Filter<T>( List<T> inputList, Func<T,bool> filter )
     {      
       var list = new List<T>();
@@ -198,6 +237,24 @@ namespace Rokojori
       );
 
       return list;
+    } 
+
+    public static void Add<T>( List<T> list, params T[] entries )
+    {
+      list.AddRange( entries );
+    }
+
+    public static void Insert<T>( List<T> list, T item, int index )
+    {
+      if ( index >= list.Count )
+      {
+        list.Add( item );
+        return;
+      }
+
+      index = index < 0 ? 0 : index;
+
+      list.Insert( index, item );
     }
 
     public static T Find<T>( List<T> list, Func<T,bool> callback )

Runtime/Tools/Safe.cs

@@ -0,0 +1,36 @@
+using System.Collections;
+using System.Collections.Generic;
+using System;
+using System.Reflection;
+using System.Text.RegularExpressions;
+
+namespace Rokojori
+{
+  public class Safe
+  {
+    static readonly int maxWhileIterations = 1000 * 1000;
+
+    public static void While( Func<bool> condition, Action action, Action onTooManyIterations = null )
+    {
+      var it = 0;
+
+      while ( it < Safe.maxWhileIterations && condition() )
+      {
+        action();
+        it++;
+      }
+
+      if ( it >= Safe.maxWhileIterations )
+      {
+        RJLog.LogWithFullTrace( "Loop with too many iterations" );
+
+        if ( onTooManyIterations != null )
+        {
+          onTooManyIterations();
+        }
+      }
+
+
+    }
+  }
+}

Runtime/UI/Layouts/UIFlowLayout.cs

@@ -67,13 +67,13 @@ namespace Rokojori
       var maxWidth = 0f;
       var maxHeight = 0f;
 
-      if ( UINumber.IsNullOrNone( region.width ) )
+      if ( UINumber.IsNullOrNone( UIStyle.Width( region ) ) )
       {
         lines.ForEach( l => { maxWidth = Mathf.Max( maxWidth, l.maxX ); } );
       }
       else
       {
-        maxWidth = UINumber.Compute( region, region.width ); 
+        maxWidth = UINumber.Compute( region, UIStyle.Width( region ) ); 
       }
 
       if ( lines.Count > 0 )
@@ -81,12 +81,12 @@ namespace Rokojori
         maxHeight = lines[ lines.Count - 1 ].maxY;
       }  
 
-      var margin     = UINumber.Compute( region, region.margin, 0 );
+      var margin     = UINumber.Compute( region, UIStyle.Margin( region ), 0 );
-      var marginLeft = margin + UINumber.Compute( region, region.marginLeft, 0 );
+      var marginLeft = margin + UINumber.Compute( region, UIStyle.MarginLeft( region ), 0 );
-      var marginTop  = margin + UINumber.Compute( region, region.marginTop, 0 ); 
+      var marginTop  = margin + UINumber.Compute( region, UIStyle.MarginTop( region ), 0 ); 
 
-      var marginRight = margin + UINumber.Compute( region, region.marginRight, 0 );
+      var marginRight = margin + UINumber.Compute( region, UIStyle.MarginRight( region ), 0 );
-      var marginBottom = margin + UINumber.Compute( region, region.marginBottom, 0 ); 
+      var marginBottom = margin + UINumber.Compute( region, UIStyle.MarginBottom( region ), 0 ); 
 
 
       var marginOffset = new Vector2( marginLeft, marginTop );
@@ -98,46 +98,38 @@ namespace Rokojori
 
       region.Size = new Vector2( maxWidth + horizontalMargins, maxHeight + verticalMargins );
 
-      if ( region.position == UIPosition.Parent_Anchor )
+      if ( UIStyle.Position( region ) == UIPosition.Parent_Anchor )
       {
-        var p = NodesWalker.Get().Parent( region ) as Control;
+        UILayouting.SetPositionInParentAnchor( region );
-
-        if ( p != null )
-        {
-          var pWidth = UILayouting.GetWidth( p );
-          var pHeight = UILayouting.GetHeight( p );   
-          
-          var x = p.Position.X;
-          var y = p.Position.Y;
-
-
-          if ( ! UINumber.IsNullOrNone( region.left ))
-          {
-            var left  = UINumber.Compute( region, region.left, 0 );
-            x = left;
-          }
-          else if ( ! UINumber.IsNullOrNone( region.right ) )
-          {
-            var right  = UINumber.Compute( region, region.right, 0 );
-            x = ( pWidth - UILayouting.GetWidth( region ) ) - right;
-          }
-
-          UILayouting.SetPosition( region, new Vector2( x, y ) );
-
-        }
-        
       }
+
+      Nodes.ForEachDirectChild<Control>( region,
+        child =>
+        {
+          
+          var styleContainer = child as UIStylePropertyContainer;
+
+          if ( styleContainer == null || UIStyle.Position( styleContainer ) != UIPosition.Parent_Anchor )
+          {
+            return;
+          }
+
+          UILayouting.UpdateChild( child );
+          UILayouting.SetPositionInParentAnchor( styleContainer );
+          
+        }
+      );
     }
 
     static List<Line> CreateLines( UIRegion region )
     {
       var x = 0f;
-      var width = UINumber.Compute( region, region.width, 100000000f );
+      var width = UINumber.Compute( region, UIStyle.Width( region ), 100000000f );
 
       var lines = new List<Line>();
       var currentLine = new Line();
 
-      var elementSpacing = UINumber.Compute( region, region.elementSpacing, 0f );
+      var elementSpacing = UINumber.Compute( region, UIStyle.ElementSpacing( region ), 0f );
 
       Nodes.ForEachDirectChild<Control>( region, c => UILayouting.UpdateChild( c ) );
       
@@ -146,6 +138,13 @@ namespace Rokojori
         child =>
         {
           
+          var styleContainer = child as UIStylePropertyContainer;
+
+          if ( styleContainer != null && UIStyle.Position( styleContainer ) == UIPosition.Parent_Anchor )
+          {
+            return;
+          }
+          
           var cWidth  = UILayouting.GetWidth( child );
           var cHeight = UILayouting.GetHeight( child );
 
@@ -193,13 +192,13 @@ namespace Rokojori
 
       lines.ForEach(  line => AdjustVerticalAlignment( region, line, verticalAlignment ) );
 
-      if ( UINumber.IsNullOrNone( region.width ) )
+      if ( UINumber.IsNullOrNone( UIStyle.Width( region ) ) )
       {
         return;
       }
 
       var horizontalAlignment = UINumber.Compute( region, region.horizontalAlignment, 0.5f, 1 );
-      var maxWidth = UINumber.Compute( region, region.width, 0 );
+      var maxWidth = UINumber.Compute( region, UIStyle.Width( region ), 0 );
 
       lines.ForEach( line => AdjustHorizontalAlignment( region, line, horizontalAlignment, maxWidth ) );
 

Runtime/UI/Layouts/UILayouting.cs

@@ -40,6 +40,45 @@ namespace Rokojori
       UILayouting.UpdatePivot( control );
     }
 
+    public static void SetPositionInParentAnchor( UIStylePropertyContainer region )
+    {
+      var control = (Control) region;
+      var p = NodesWalker.Get().Parent( control ) as Control;
+      
+      var pWidth  = p == null ? UI.GetWindowWidth( control ) : UILayouting.GetWidth( p );
+      var pHeight = p == null ? UI.GetWindowHeight( control ) : UILayouting.GetHeight( p );   
+      
+      var x = p.Position.X;
+      var y = p.Position.Y;
+
+
+      if ( ! UINumber.IsNullOrNone( UIStyle.Left( region ) ))
+      {
+        var left  = UINumber.Compute( control, UIStyle.Left( region ), 0 );
+        x = left;
+      }
+      else if ( ! UINumber.IsNullOrNone( UIStyle.Right( region ) ) )
+      {
+        var right  = UINumber.Compute( control, UIStyle.Right( region ), 0 );
+        x = ( pWidth - UILayouting.GetWidth( control ) ) - right;
+      }
+
+      if ( ! UINumber.IsNullOrNone( UIStyle.Top( region ) ))
+      {
+        var top  = UINumber.Compute( control, UIStyle.Top( region ), 0 );
+        y = top;
+      }
+      else if ( ! UINumber.IsNullOrNone( UIStyle.Bottom( region ) ) )
+      {
+        var bottom  = UINumber.Compute( control, UIStyle.Bottom( region ), 0 );
+        y = ( pHeight - UILayouting.GetHeight( control ) ) - bottom;
+      }
+
+      UILayouting.SetPosition( control, new Vector2( x, y ) );
+
+      
+    }
+
     public static void UpdatePivot( Control c )
     {
       if ( ! ( c is UIImage || c is UIRegion || c is UIText ) )
@@ -49,8 +88,8 @@ namespace Rokojori
 
       var container = c as UIStylePropertyContainer;
 
-      var pivotX  = UINumber.Compute( c, UIStyle.PivotX( container ), 0, c.Size.X );
+      var pivotX  = UINumber.Compute( c, UIStyle.PivotX( container ), 0.5f * c.Size.X, c.Size.X );
-      var pivotY  = UINumber.Compute( c, UIStyle.PivotY( container ), 0, c.Size.Y );
+      var pivotY  = UINumber.Compute( c, UIStyle.PivotY( container ), 0.5f * c.Size.Y, c.Size.Y );
 
       c.PivotOffset = new Vector2( pivotX, pivotY );
 

Runtime/UI/Nodes/UIImage.cs

@@ -8,6 +8,9 @@ namespace Rokojori
   [GlobalClass]
   public partial class UIImage:TextureRect, UIStylePropertyContainer
   { 
+    [Export]
+    public UIStyle parentStyle;
+
     [ExportCategory("Size & Margins")]
     [Export]
     public UINumber width;
@@ -60,6 +63,16 @@ namespace Rokojori
     public UINumber scaleY;
 
 
+    public UIStyle GetUIStyleParent()
+    {
+      return parentStyle;
+    }
+
+    public UIPosition GetUIPosition()
+    {
+      return position;
+    }
+
     public UINumber GetUIStyleNumberProperty( UIStyleNumberProperty property )
     {
       switch ( property )

Runtime/UI/Nodes/UIRegion.cs

@@ -8,9 +8,9 @@ namespace Rokojori
   public partial class UIRegion : Control, UIStylePropertyContainer
   {   
     [Export]
-    public UIStyle parent;
+    public UIStyle parentStyle;
 
-    [ExportCategory("Layout")]
+    [ExportCategory( "Layout" )]
     [Export]
     public UILayout layout;        
 
@@ -25,7 +25,7 @@ namespace Rokojori
     public UINumber lineSpacing;
 
     
-    [ExportCategory("Size & Margins")]
+    [ExportCategory( "Size & Margins" )]
     [Export]
     public UINumber width;
     [Export]
@@ -44,7 +44,27 @@ namespace Rokojori
     [Export] 
     public UINumber marginBottom;
 
-    [ExportCategory("Position")]
+    [ExportCategory( "Font" )]
+    [Export]
+    public Font font;
+    [Export]
+    public UINumber fontSize;
+    [Export]
+    public UIColor fontColor;
+
+    [Export]
+    public UINumber outlineSize;
+    [Export]
+    public UIColor outlineColor;
+
+    [Export]
+    public UINumber shadowSize;
+    [Export]
+    public UIColor shadowColor;
+
+
+
+    [ExportCategory( "Position" )]
     [Export]
     public UIPosition position;
     [Export]
@@ -57,6 +77,16 @@ namespace Rokojori
     public UINumber bottom;
 
 
+    public UIStyle GetUIStyleParent()
+    {
+      return parentStyle;
+    }
+
+    public UIPosition GetUIPosition()
+    {
+      return position;
+    }
+
     public UINumber GetUIStyleNumberProperty( UIStyleNumberProperty property )
     {
       switch ( property )
@@ -69,6 +99,10 @@ namespace Rokojori
         case UIStyleNumberProperty.Width:  return width;
         case UIStyleNumberProperty.Height: return height;
 
+        
+        case UIStyleNumberProperty.ElementSpacing: return elementSpacing;
+        case UIStyleNumberProperty.LineSpacing:    return lineSpacing;
+
         case UIStyleNumberProperty.Margin:       return margin;
 
         case UIStyleNumberProperty.MarginLeft:   return marginLeft;

Runtime/UI/Nodes/UIText.cs

@@ -8,6 +8,12 @@ namespace Rokojori
   [GlobalClass]
   public partial class UIText:Label,UIStylePropertyContainer
   {
+    [Export]
+    public UIStyle parentStyle;
+
+    [Export]
+    public UINumber fontSize;
+
     [ExportCategory("Size & Margins")]
     [Export]
     public UINumber width;
@@ -59,6 +65,15 @@ namespace Rokojori
     [Export]
     public UINumber scaleY;
 
+    public UIStyle GetUIStyleParent()
+    {
+      return parentStyle;
+    }
+
+    public UIPosition GetUIPosition()
+    {
+      return position;
+    }
 
     public UINumber GetUIStyleNumberProperty( UIStyleNumberProperty property )
     {

Runtime/UI/Styling/UIColor.cs

@@ -0,0 +1,15 @@
+
+using Godot;
+using Rokojori;
+ 
+namespace Rokojori
+{ 
+
+  [Tool]
+  [GlobalClass] 
+  public partial class UIColor : Resource
+  { 
+    [Export]
+    public Color color;
+  }
+}

Runtime/UI/Styling/UINumber.cs

@@ -34,6 +34,7 @@ namespace Rokojori
       return number.IsNone;
     }
 
+    
     public static float Compute( Control control, UINumber number, float alternative = 0, float relative = 100 )
     {
       if ( number == null || control == null || number.IsNone )
@@ -41,19 +42,9 @@ namespace Rokojori
         return alternative;
       }
 
-      var width = 0;
+      var width  = UI.GetWindowWidth( control );
-      var height = 0;
+      var height = UI.GetWindowHeight( control );
 
-      if ( Engine.IsEditorHint() )
-      {
-        width  = ProjectSettings.GetSetting( "display/window/size/viewport_width" ).AsInt32();
-        height = ProjectSettings.GetSetting( "display/window/size/viewport_height" ).AsInt32();
-      }
-      else
-      {
-        width  = control.GetWindow().Size.X;
-        height = control.GetWindow().Size.Y;
-      }
 
       return Compute( control, number, width, height, relative );
       
@@ -75,7 +66,7 @@ namespace Rokojori
 
       if ( _ui == null )
       {
-       // _ui = NodesWalker.Get().GetParent( control, n => n is UI ) as UI;
+        _ui = NodesWalker.Get().GetInParents( control, n => n is UI ) as UI;
       }
 
       switch ( number.unit )
@@ -95,6 +86,18 @@ namespace Rokojori
           return number.value * height / 100f;
         }
 
+        case "pw":
+        {
+          var parent = control.GetParent<Control>();
+          return number.value / 100f * ( parent == null ?  width : parent.Size.X );
+        }
+
+        case "ph":
+        {
+          var parent = control.GetParent<Control>();
+          return number.value / 100f * ( parent == null ?  height : parent.Size.Y );
+        }
+
         case "px": case "":
         {
           return number.value;
@@ -110,17 +113,25 @@ namespace Rokojori
 
 
       var expressionText = number.unit == null ? "" : RegexUtility.Replace( number.unit, "%", " * relative " ); 
-      var parseResult = expression.Parse( expressionText, new string[]{ "em","vw", "vh", "px", "relative", "value" } );
+      var parseResult = expression.Parse( expressionText, 
+        new string[]
+        { 
+          "em","vw", "vh", "pw", "ph", "px", "relative", "value" } 
+        );
 
       if ( Error.Ok != parseResult )
       {
         return 0;
       }
 
+      var parentControl = control.GetParent<Control>();
+
       var inputs = new Godot.Collections.Array();
       inputs.Add( em() );
       inputs.Add( width / 100f );
       inputs.Add( height / 100f );
+      inputs.Add( ( parentControl == null ? width : parentControl.Size.X ) / 100f );
+      inputs.Add( ( parentControl == null ? height : parentControl.Size.Y ) / 100f );
       inputs.Add( 1 );      
       inputs.Add( relative / 100f );
 

Runtime/UI/Styling/UIPosition.cs

@@ -6,6 +6,7 @@ namespace Rokojori
 { 
   public enum UIPosition
   {
+    ___,
     From_Layout,
     Parent_Anchor
   }

Runtime/UI/Styling/UIStyle.cs

@@ -7,106 +7,236 @@ namespace Rokojori
 
   [Tool]
   [GlobalClass] 
-  public partial class UIStyle:Resource
+  public partial class UIStyle:Resource, UIStylePropertyContainer
   {
     [Export]
-    public UIStyle parent;
+    public UIStyle parentStyle;
-  
-    [Export]
-    public UILayout layoutType;
 
-    [ExportCategory("Width")]
+    [ExportCategory( "Layout" )]
     [Export]
-    public float widthValue = 1;
+    public UILayout layout;        
-    [Export]
-    public string widthUnit = "vw";
 
-    [ExportCategory("Height")]
     [Export]
-    public float heightValue = 1;
+    public UINumber horizontalAlignment;
     [Export]
-    public string heightUnit = "vw";
+    public UINumber verticalAlignment;
 
-    [ExportCategory("LineSpacing")]
     [Export]
-    public float lineSpacingValue = 1;
+    public UINumber elementSpacing;
     [Export]
-    public string ineSpacingtUnit = "vw";
+    public UINumber lineSpacing;
+
+    
+    [ExportCategory( "Size & Margins" )]
+    [Export]
+    public UINumber width;
+    [Export]
+    public UINumber height;
+
+
+    [Export] 
+    public UINumber margin;
+
+    [Export] 
+    public UINumber marginLeft;
+    [Export] 
+    public UINumber marginTop;
+    [Export] 
+    public UINumber marginRight;
+    [Export] 
+    public UINumber marginBottom;
+
+    [ExportCategory( "Font" )]
+    [Export]
+    public Font font;
+    [Export]
+    public UINumber fontSize;
+    [Export]
+    public UIColor fontColor;
+
+    [Export]
+    public UINumber outlineSize;
+    [Export]
+    public UIColor outlineColor;
+
+    [Export]
+    public UINumber shadowSize;
+    [Export]
+    public UIColor shadowColor;
+
+    [ExportCategory( "Position" )]
+    [Export]
+    public UIPosition position;
+    [Export]
+    public UINumber left;
+    [Export]
+    public UINumber top;
+    [Export]
+    public UINumber right;
+    [Export]
+    public UINumber bottom;
    
+    public UIStyle GetUIStyleParent()
+    {
+      return parentStyle;
+    }
+
+    public UIPosition GetUIPosition()
+    {
+      return position;
+    }
+
+    public UINumber GetUIStyleNumberProperty( UIStyleNumberProperty property )
+    {
+      switch ( property )
+      {
+        case UIStyleNumberProperty.Left:   return left;
+        case UIStyleNumberProperty.Right:  return right;
+        case UIStyleNumberProperty.Top:    return top;
+        case UIStyleNumberProperty.Bottom: return bottom;
+
+        case UIStyleNumberProperty.ElementSpacing: return elementSpacing;
+        case UIStyleNumberProperty.LineSpacing:    return lineSpacing;
+
+
+        case UIStyleNumberProperty.Width:  return width;
+        case UIStyleNumberProperty.Height: return height;
+
+        case UIStyleNumberProperty.Margin:       return margin;
+
+        case UIStyleNumberProperty.MarginLeft:   return marginLeft;
+        case UIStyleNumberProperty.MarginRight:  return marginRight;
+        case UIStyleNumberProperty.MarginTop:    return marginTop;
+        case UIStyleNumberProperty.MarginBottom: return marginBottom;
+      }
+
+      return null;
+    }
+
+    public static UINumber GetReferenceableNumberProperty( UIStylePropertyContainer container, UIStyleNumberProperty property )
+    {
+      if ( container == null )
+      {
+        return null;
+      }
+
+      var ownProperty = container.GetUIStyleNumberProperty( property );
+
+      if ( ownProperty != null )
+      {
+        return ownProperty;
+      }
+
+      var style = container.GetUIStyleParent();
+
+      return GetReferenceableNumberProperty( style, property );
+    } 
+
+    public static UIPosition Position( UIStylePropertyContainer container )
+    {
+      var ownProperty = container.GetUIPosition();
+
+      if ( ownProperty != UIPosition.___ )
+      {
+        return ownProperty;
+      }
+
+      return container.GetUIPosition();
+    }
+
+    public static UINumber Width( UIStylePropertyContainer container )
+    {
+      return GetReferenceableNumberProperty( container, UIStyleNumberProperty.Width );
+    }
+
+    public static UINumber Height( UIStylePropertyContainer container )
+    {
+      return GetReferenceableNumberProperty( container, UIStyleNumberProperty.Height );
+    }
 
     public static UINumber Left( UIStylePropertyContainer container )
     {
-      return container.GetUIStyleNumberProperty( UIStyleNumberProperty.Left );
+      return GetReferenceableNumberProperty( container, UIStyleNumberProperty.Left );
     }
 
     public static UINumber Right( UIStylePropertyContainer container )
     {
-      return container.GetUIStyleNumberProperty( UIStyleNumberProperty.Right );
+      return GetReferenceableNumberProperty( container, UIStyleNumberProperty.Right );
     }
 
     public static UINumber Top( UIStylePropertyContainer container )
     {
-      return container.GetUIStyleNumberProperty( UIStyleNumberProperty.Top );
+      return GetReferenceableNumberProperty( container, UIStyleNumberProperty.Top );
     }
 
     public static UINumber Bottom( UIStylePropertyContainer container )
     {
-      return container.GetUIStyleNumberProperty( UIStyleNumberProperty.Bottom );
+      return GetReferenceableNumberProperty( container, UIStyleNumberProperty.Bottom );
     }
     
     public static UINumber Margin( UIStylePropertyContainer container )
     {
-      return container.GetUIStyleNumberProperty( UIStyleNumberProperty.Margin );
+      return GetReferenceableNumberProperty( container, UIStyleNumberProperty.Margin );
     }
 
     public static UINumber MarginLeft( UIStylePropertyContainer container )
     {
-      return container.GetUIStyleNumberProperty( UIStyleNumberProperty.MarginLeft );
+      return GetReferenceableNumberProperty( container, UIStyleNumberProperty.MarginLeft );
     }
 
     public static UINumber MarginRight( UIStylePropertyContainer container )
     {
-      return container.GetUIStyleNumberProperty( UIStyleNumberProperty.MarginRight );
+      return GetReferenceableNumberProperty( container, UIStyleNumberProperty.MarginRight );
     }
 
     public static UINumber MarginTop( UIStylePropertyContainer container )
     {
-      return container.GetUIStyleNumberProperty( UIStyleNumberProperty.MarginTop );
+      return GetReferenceableNumberProperty( container, UIStyleNumberProperty.MarginTop );
     }
 
     public static UINumber MarginBottom( UIStylePropertyContainer container )
     {
-      return container.GetUIStyleNumberProperty( UIStyleNumberProperty.MarginBottom );
+      return GetReferenceableNumberProperty( container, UIStyleNumberProperty.MarginBottom );
     }
 
     public static UINumber PivotX( UIStylePropertyContainer container )
     {
-      return container.GetUIStyleNumberProperty( UIStyleNumberProperty.PivotX );
+      return GetReferenceableNumberProperty( container, UIStyleNumberProperty.PivotX );
     }
 
     public static UINumber PivotY( UIStylePropertyContainer container )
     {
-      return container.GetUIStyleNumberProperty( UIStyleNumberProperty.PivotY );
+      return GetReferenceableNumberProperty( container, UIStyleNumberProperty.PivotY );
     }
 
     public static UINumber Rotation( UIStylePropertyContainer container )
     {
-      return container.GetUIStyleNumberProperty( UIStyleNumberProperty.Rotation );
+      return GetReferenceableNumberProperty( container, UIStyleNumberProperty.Rotation );
     }
  
     public static UINumber Scale( UIStylePropertyContainer container )
     {
-      return container.GetUIStyleNumberProperty( UIStyleNumberProperty.Scale );
+      return GetReferenceableNumberProperty( container, UIStyleNumberProperty.Scale );
     }
 
     public static UINumber ScaleX( UIStylePropertyContainer container )
     {
-      return container.GetUIStyleNumberProperty( UIStyleNumberProperty.ScaleX );
+      return GetReferenceableNumberProperty( container, UIStyleNumberProperty.ScaleX );
     }
 
     public static UINumber ScaleY( UIStylePropertyContainer container )
     {
-      return container.GetUIStyleNumberProperty( UIStyleNumberProperty.ScaleY );
+      return GetReferenceableNumberProperty( container, UIStyleNumberProperty.ScaleY );
+    }
+
+    public static UINumber ElementSpacing( UIStylePropertyContainer container )
+    {
+      return GetReferenceableNumberProperty( container, UIStyleNumberProperty.ElementSpacing );
+    }
+
+    public static UINumber LineSpacing( UIStylePropertyContainer container )
+    {
+      return GetReferenceableNumberProperty( container, UIStyleNumberProperty.LineSpacing );
     }
 
   }

Runtime/UI/Styling/UIStyleProperty.cs

@@ -14,6 +14,9 @@ namespace Rokojori
     Width,
     Height,
 
+    ElementSpacing,
+    LineSpacing,
+
     Margin,
     MarginLeft,
     MarginRight,
@@ -27,6 +30,17 @@ namespace Rokojori
 
     Scale,
     ScaleX,
-    ScaleY
+    ScaleY,
+
+    FontSize,
+    FontOutlineSize,
+    FontShadowSize
+  }
+
+  public enum UIStyleColorProperty
+  {
+    FontColor,
+    FontOutlineColor,
+    FontShadowColor
   }
 }

Runtime/UI/Styling/UIStylePropertyContainer.cs

@@ -6,6 +6,9 @@ namespace Rokojori
 { 
   public interface UIStylePropertyContainer
   {
+    UIStyle GetUIStyleParent();
+
+    UIPosition GetUIPosition();
     UINumber GetUIStyleNumberProperty( UIStyleNumberProperty property );
   }
 }

Runtime/UI/UI.cs

@@ -29,7 +29,7 @@ namespace Rokojori
       UpdateUIElements();
     }
 
-        
+
 
     void UpdateFontSize()
     {
@@ -53,6 +53,30 @@ namespace Rokojori
       Nodes.ForEachDirectChild<UIRegion>( this, r => r.Layout() );
     }
 
+
+    public static float GetWindowWidth( Control control )
+    {
+      if ( Engine.IsEditorHint() )
+      {
+        return ProjectSettings.GetSetting( "display/window/size/viewport_width" ).AsInt32();
+      }
+      else
+      {
+        return control.GetWindow().Size.X;
+      }
+    }
+
+    public static float GetWindowHeight( Control control )
+    {
+      if ( Engine.IsEditorHint() )
+      {
+        return ProjectSettings.GetSetting( "display/window/size/viewport_height" ).AsInt32();
+      }
+      else
+      {
+        return control.GetWindow().Size.Y;
+      }
+    }
     
 
   }