XMXXE/temp/internal/effects/__builtin-editor-gizmo-line.effect

// Copyright (c) 2017-2019 Xiamen Yaji Software Co., Ltd.
// 用于BoundingBox的线的渲染，被物体挡住的包围盒的线会带透明度，没被物体挡住的线是实体的。
%{
  "techniques": [
    {
      "stages": [
        "transparent"
      ],
      "passes": [
        {
          "vert": "line-vs",
          "frag": "line-fs:front",
          "cullMode": "none",
          "depthTest": true,
          "blend": true,
          "blendEq": "add",
          "blendSrc": "srcAlpha",
          "blendDst": "one",
        },
        {
          "vert": "line-vs",
          "frag": "line-fs:back",
          "cullMode": "none",
          "depthTest": true,
          "depthFunc": "greater",
          "blend": true,
          "blendEq": "add",
          "blendSrc": "srcAlpha",
          "blendDst": "one",
        }
      ]
    }
  ],

  "properties": {
    "diffuseColor": {
      "type": "color4",
      "value": [1, 1, 1, 1]
    }
  }
%}

%% line-vs {
  precision highp float;

  #include <cc-global>
  #include <cc-local>
  #include <common-attribute>

  void main () {
    gl_Position = cc_matViewProj * cc_matWorld * vec4(a_position, 1);
    gl_Position.z -= 0.0001;
  }
}

%% line-fs {
  precision highp float;
  
  #include <encodings>
  uniform vec4 diffuseColor;
  vec4 front() {
    return LINEAR_TO_OUTPUT_TEXEL(diffuseColor);
  }
  vec4 back() {
    return LINEAR_TO_OUTPUT_TEXEL(vec4(diffuseColor.rgb, diffuseColor.a * 0.2));
  }
}