Augmenta_duplicator.isf

// Augmenta dots example shader
// by Augmenta (https://www.augmenta.tech)
// Ben Kuperberg, Thomas Weissgerber and David-Alexandre Chanel

/*{
  "CREDIT": "Joseph Fiola",
  "DESCRIPTION": "",
  "CATEGORIES": [
    "Generator"
  ],
  "INPUTS": [
	{
      "NAME": "augmentaData",
      "TYPE": "image"
    },
	{
      "NAME": "augmentaMaxNumObjects",
      "TYPE": "float",
      "DEFAULT": 20,
      "MIN": 1,
      "MAX": 20
    },
    {
      "NAME": "inputImage",
      "TYPE": "image"
    },
    {
      "NAME": "size",
      "TYPE": "float",
      "DEFAULT": 0.35,
      "MIN": 0,
      "MAX": 1
    }
  ]
}*/


vec4 drawImage(vec2 pos, float st, float weight, float radius)
{
    vec4 result = vec4(0,0,0,0);
    vec2 uv = gl_FragCoord.xy / RENDERSIZE.xy;

    float dist = length(uv - pos);
    vec2 distCoord = vec2(uv.x - pos.x, -(uv.y - pos.y));
	vec2 imageCoordCenter = vec2(0.5);
	
	vec2 look2; 
	look2 = distCoord;
	
	distCoord = distCoord*0.5/size + imageCoordCenter;	

    vec4 tColor = IMG_NORM_PIXEL(inputImage, distCoord);

    float factor = step(-radius, look2.x)*(1-step(radius, look2.x))* step(-radius, look2.y)*(1-step(radius, look2.y));
    result = factor * tColor *  weight;

   return result;
}


void main()
{
  // Init
  vec4 colorOut = vec4(0.0,0.0,0.0,0.0);


  for(float i=0;i<augmentaMaxNumObjects;++i)
  {
    // Get the point
	float uvX = (i+.5)/augmentaMaxNumObjects;
    vec4 point = texture2D(augmentaData, vec2(uvX,0));
		
    // Draw
	if(point.x == 0 || point.y == 0 || point.w == 0) continue;
	colorOut += drawImage(point.xy, point.z, point.w, size);
  }
 
    gl_FragColor = colorOut;
}