point_sprite_example.glsl

// Vertex shader
/**
 *  This is for rendering colored liquid/particles using LiquidFun etc
 */

uniform mat4 u_view_projection_matrix;
uniform float u_depth;

attribute vec4 a_Position;
attribute vec4 a_color;
attribute float a_size;

varying vec4 v_color;

void main()
{

  v_color = a_color + vec4(0.0, 0.0, 0.4, 1.0);
  //v_color =  vec4(0.0, 0.0, 1.0, 1.0);
  gl_PointSize = a_size;
  //vec4 pos = vec4(a_Position.xy, u_depth, a_Position.w);
  vec4 pos = a_Position;
  pos.z = u_depth;
  gl_Position = u_view_projection_matrix * pos;

}


// Fragment shader
/**
 *  This is for rendering colored liquid/particles using LiquidFun etc
 */

#ifdef GL_ES
precision lowp float;
#endif

uniform sampler2D u_texture;
varying vec4 v_color;

void main()
{

  // Get frag from texture
  //gl_FragColor =  v_color;
  gl_FragColor =  texture2D(u_texture, gl_PointCoord);
  //  vec4 color =  texture2D(u_texture, gl_PointCoord) * v_color;
  //  gl_FragColor =  color;

}