#include "res://addons/rokojori_action_library/Runtime/Shading/Library/Colors.gdshaderinc"
#include "res://addons/rokojori_action_library/Runtime/Shading/Library/Math.gdshaderinc"
#include "res://addons/rokojori_action_library/Runtime/Shading/Library/Transform.gdshaderinc"
#include "res://addons/rokojori_action_library/Runtime/Shading/Library/Depth.gdshaderinc"
#include "res://addons/rokojori_action_library/Runtime/Shading/Library/SDF.gdshaderinc"
#include "res://addons/rokojori_action_library/Runtime/Shading/Library/Noise.gdshaderinc"

void setFlareOffsetMatrix( 
  inout mat4 _MODELVIEW_MATRIX, 
  mat4 _VIEW_MATRIX, 
  mat4 _MAIN_CAM_INV_VIEW_MATRIX, 
  mat4 _MODEL_MATRIX, 
  vec2 _screenOffsetScale,
  vec2 _offset
)
{
  _MODELVIEW_MATRIX = _VIEW_MATRIX * mat4(
    _MAIN_CAM_INV_VIEW_MATRIX[ 0 ],
    _MAIN_CAM_INV_VIEW_MATRIX[ 1 ],
    _MAIN_CAM_INV_VIEW_MATRIX[ 2 ],
    _MODEL_MATRIX[ 3 ]
  );  

  vec3 _viewPosition = _MODELVIEW_MATRIX[ 3 ].xyz;

  
  _viewPosition.xy += _viewPosition.xy * _screenOffsetScale + _offset;
  

  _MODELVIEW_MATRIX[ 3 ].xyz = _viewPosition;
}

void setFlareScaleRotation( 
  inout mat4 _MODELVIEW_MATRIX, 
  inout mat3 _MODELVIEW_NORMAL_MATRIX, 
  mat4 _MODEL_MATRIX, 
  vec3 _scale, float _vertexRotation
)
{
  // _MODELVIEW_MATRIX = _VIEW_MATRIX * mat4(
  //   _MAIN_CAM_INV_VIEW_MATRIX[ 0 ],
  //   _MAIN_CAM_INV_VIEW_MATRIX[ 1 ],
  //   _MAIN_CAM_INV_VIEW_MATRIX[ 2 ],
  //   _MODEL_MATRIX[ 3 ]
  // );  

  // vec3 _viewPosition = _MODELVIEW_MATRIX[ 3 ].xyz;

  
  // _viewPosition.xy += _viewPosition.xy * _screenOffsetScale;
  

  // _MODELVIEW_MATRIX[ 3 ].xyz = _viewPosition;

  float _scaleX = length( _MODEL_MATRIX[ 0 ].xyz ) * _scale.x;
  float _scaleY = length( _MODEL_MATRIX[ 1 ].xyz ) * _scale.y;
  float _scaleZ = length( _MODEL_MATRIX[ 2 ].xyz ) * _scale.z;

  _MODELVIEW_MATRIX = _MODELVIEW_MATRIX * rotationZ_m4( _vertexRotation ) * mat4(
    vec4( _scaleX, 0.0, 0.0, 0.0 ),
    vec4( 0.0, _scaleY, 0.0, 0.0 ),
    vec4( 0.0, 0.0, _scaleZ, 0.0 ),
    vec4( 0.0, 0.0, 0.0, 1.0 )
  ) ;

  _MODELVIEW_NORMAL_MATRIX = mat3( _MODELVIEW_MATRIX );
}