@xeokit/xeokit-sdk/src/viewer/scene/mesh/pick/PickTriangleShaderSource.js

3D BIM IFC Viewer SDK for AEC engineering applications. Open Source JavaScript Toolkit based on pure WebGL for top performance, real-world coordinates and full double precision

export const PickTriangleShaderSource = function(meshHash, programVariables, geometry) {
    const vColor = programVariables.createVarying("vec4", "vColor", () => geometry.attributes.pickColor);
    const outColor = programVariables.createOutput("vec4", "outColor");
    return {
        getHash: () => [ meshHash ],
        programName: "PickTriangle",
        isPick: true,
        trianglePick: true,
        appendFragmentOutputs: (src) => src.push(`${outColor} = ${vColor};`)
    };
};