CCEffect %{
  techniques:
    - passes:
      - vert: sprite-vs:vert
        frag: sprite-fs:frag
        depthStencilState:
          depthTest: false
          depthWrite: false
        blendState:
          targets:
          - blend: true
            blendSrc: src_alpha 
            blendDst: one_minus_src_alpha
            blendDstAlpha: one_minus_src_alpha   
        properties: &props
          mainTexture:    { value: white }
          altlasUV:   { value: [0, 0, 0, 0] }
          
          # mainColor:      { value: [1, 1, 1, 1], linear: true, editor: { type: color } }
          # colorScale:     { value: [1, 1, 1], target: colorScaleAndCutoff.xyz }
          # alphaThreshold: { value: 0.5}
          # uMin: { value: 0.0}
          # uMax: { value: 1.0}
        # migrations: &migs
        #   properties:
        #     mainColor:    { formerlySerializedAs: color }
%}

CCProgram sprite-vs %{
  precision highp float;
  #include <legacy/input>
  #include <builtin/uniforms/cc-global>
  // #include <legacy/decode-base>
  #include <legacy/local-batch>

  //显示声明layout(std140)
  uniform PARAMS_VERT {
    float placehold;
  };

  out vec2 v_uv;
  out vec3 fragWorldPos;

  vec4 vert () {
    vec4 position;
    CCVertInput(position);

    fragWorldPos = a_position;
    mat4 matWorld;
    CCGetWorldMatrix(matWorld);
    v_uv = a_texCoord;
    return cc_matProj * (cc_matView * matWorld) * position;

  }
}% 

CCProgram sprite-fs %{
  precision highp float;

  in vec2 v_uv;
  in vec3 fragWorldPos;
  uniform sampler2D mainTexture;

  //显示声明layout(std140)
  uniform PARAMS_FRAG {
    vec4 altlasUV;
    float palcehold;
    // float uMin;
    // float uMax;
  };

  vec4 frag () {
    vec2 uvOrigin = altlasUV.xy;
    vec2 uvSize = altlasUV.zw;
    vec2 uvTmp = v_uv;
    uvTmp.y = 1.0 - uvTmp.y;
    vec2 mapUV = uvOrigin + uvTmp * uvSize;
    vec4 texColor = texture(mainTexture, mapUV);
    return texColor;
  }
}%