playcanvas/build/playcanvas.dbg/src/scene/shader-lib/chunks/gsplat/vert/gsplatCenter.js

PlayCanvas WebGL game engine

var gsplatCenterVS = "\nuniform mat4 matrix_model;\nuniform mat4 matrix_view;\nuniform mat4 matrix_projection;\n\n// project the model space gaussian center to view and clip space\nbool initCenter(vec3 modelCenter, out SplatCenter center) {\n    mat4 modelView = matrix_view * matrix_model;\n    vec4 centerView = modelView * vec4(modelCenter, 1.0);\n\n    // early out if splat is behind the camera\n    if (centerView.z > 0.0) {\n        return false;\n    }\n\n    vec4 centerProj = matrix_projection * centerView;\n\n    // ensure gaussians are not clipped by camera near and far\n    centerProj.z = clamp(centerProj.z, -abs(centerProj.w), abs(centerProj.w));\n\n    center.view = centerView.xyz / centerView.w;\n    center.proj = centerProj;\n    center.projMat00 = matrix_projection[0][0];\n    center.modelView = modelView;\n    return true;\n}\n";

export { gsplatCenterVS as default };