[Cocos Creator] 颜色可变的剪影效果 Shader

// Eazax 剪影效果

CCEffect %{
  techniques:
  - passes:
    - vert: vs
     frag: fs
     blendState:
       targets:
       - blend: true
     rasterizerState:
         cullMode: none
     properties:
         targetColor: { value: [0.0, 0.0, 0.0, 1], inspector: { type: color } }
}%

CCProgram vs %{
  precision highp float;

  #include <cc-global>

  attribute vec3 a_position;
  attribute vec2 a_uv0;
  out vec2 uv0;

  void main () {
    gl_Position = cc_matViewProj * vec4(a_position, 1);
    uv0 = a_uv0;
  }
}%

CCProgram fs %{
  precision highp float;

  in vec2 uv0;
  uniform sampler2D texture;
  uniform FragConstants {
    vec4 targetColor;
  };

  void main () {
    vec2 coord = uv0.xy;
    vec4 color = texture2D(texture, coord);
    gl_FragColor = vec4(targetColor.r, targetColor.g, targetColor.b, color.a);
  }
}%