cocos-creator-template/assets/effects/internal/builtin-wireframe.effect

// Copyright (c) 2017-2020 Xiamen Yaji Software Co., Ltd.
CCEffect %{
  techniques:
  - name: opaque
    passes:
    - vert: wireframe-vs:vert
      frag: wireframe-fs:frag
      properties:
        lineColor: { value: [1, 1, 1, 1] }
}%

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

    uniform TexCoords {
        vec4 lineColor;
    };



    out vec2 bary;
    out vec4 lineCol;
    vec4 vert () {
         vec4 position;
        CCVertInput(position);

        mat4 matWorld;
        CCGetWorldMatrix(matWorld);

        bary = a_texCoord;
        lineCol = lineColor;
        return cc_matProj * (cc_matView * matWorld) * position;;
    }
}%

CCProgram wireframe-fs %{
    precision mediump float;
    #include <legacy/output>

    in vec2 bary;

    in vec4 lineCol;
    vec4 frag () {
        return CCFragOutput(lineCol);
    }
}%