playcanvas/build/playcanvas/src/scene/shader-lib/glsl/chunks/gsplat/vert/gsplat.d.ts

PlayCanvas WebGL game engine

declare const _default: "\n#include \"gsplatCommonVS\"\n\nvarying mediump vec2 gaussianUV;\nvarying mediump vec4 gaussianColor;\n\n#ifndef DITHER_NONE\n    varying float id;\n#endif\n\nmediump vec4 discardVec = vec4(0.0, 0.0, 2.0, 1.0);\n\n#ifdef PREPASS_PASS\n    varying float vLinearDepth;\n#endif\n\n#ifdef GSPLAT_OVERDRAW\n    uniform sampler2D colorRamp;\n    uniform float colorRampIntensity;\n#endif\n\nvoid main(void) {\n    // read gaussian details\n    SplatSource source;\n    if (!initSource(source)) {\n        gl_Position = discardVec;\n        return;\n    }\n\n    #ifdef GSPLAT_WORKBUFFER_DATA\n        loadSplatTextures(source);\n    #endif\n\n    vec3 modelCenter = readCenter(source);\n\n    SplatCenter center;\n    center.modelCenterOriginal = modelCenter;\n    \n    modifyCenter(modelCenter);\n    center.modelCenterModified = modelCenter;\n\n    if (!initCenter(modelCenter, center)) {\n        gl_Position = discardVec;\n        return;\n    }\n\n    // project center to screen space\n    SplatCorner corner;\n    if (!initCorner(source, center, corner)) {\n        gl_Position = discardVec;\n        return;\n    }\n\n    // read color\n    vec4 clr = readColor(source);\n\n    #if GSPLAT_AA\n        // apply AA compensation\n        clr.a *= corner.aaFactor;\n    #endif\n\n    // evaluate spherical harmonics\n    #if SH_BANDS > 0\n        // calculate the model-space view direction\n        vec3 dir = normalize(center.view * mat3(center.modelView));\n\n        // read sh coefficients\n        vec3 sh[SH_COEFFS];\n        float scale;\n        readSHData(source, sh, scale);\n\n        // evaluate\n        clr.xyz += evalSH(sh, dir) * scale;\n    #endif\n\n    modifyColor(modelCenter, clr);\n\n    clipCorner(corner, clr.w);\n\n    // write output\n    gl_Position = center.proj + vec4(corner.offset, 0, 0);\n    gaussianUV = corner.uv;\n\n    #ifdef GSPLAT_OVERDRAW\n        // Overdraw visualization mode: color by elevation\n        float t = clamp(modelCenter.y / 20.0, 0.0, 1.0);\n        vec3 rampColor = textureLod(colorRamp, vec2(t, 0.5), 0.0).rgb;\n        clr.a *= (1.0 / 32.0) * colorRampIntensity;\n        gaussianColor = vec4(rampColor, clr.a);\n    #else\n        gaussianColor = vec4(prepareOutputFromGamma(max(clr.xyz, 0.0)), clr.w);\n    #endif\n\n    #ifndef DITHER_NONE\n        id = float(source.id);\n    #endif\n\n    #ifdef PREPASS_PASS\n        vLinearDepth = -center.view.z;\n    #endif\n}\n";
export default _default;