rj-action-library/Runtime/Shading/Library/SDF.gdshaderinc

// #include "res://addons/rokojori_action_library/Runtime/Shading/Library/SDF.gdshaderinc"

void computeRectangleBounds( float in_offset, float in_radius, float in_maxRadius, vec2 size, out vec2 minP, out vec2 maxP, out float out_radius )
{
  out_radius = min( in_radius, in_maxRadius );
  float borderSize = out_radius + in_offset;
  minP = vec2( borderSize, borderSize );
  maxP = size - vec2( borderSize, borderSize );
}

float roundedRectangleDistance( vec2 minP, vec2 maxP, vec2 pos)
{
  vec2 leftTop     = minP - pos;
  vec2 bottomRight = pos - maxP;

  vec2 maximum = max( leftTop, bottomRight );
  maximum = max( maximum, vec2(0,0) );

  return length( maximum );
}

float roundedRectangle( vec2 minP, vec2 maxP, vec2 point, float borderSize, float sharp )
{
  float rectangleDistance = roundedRectangleDistance( minP, maxP, point );
  rectangleDistance -= borderSize;
  rectangleDistance *= sharp;

  rectangleDistance = clamp( rectangleDistance, 0.0, 1.0 );

  return 1.0 - rectangleDistance;
}