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playcanvas

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Open-source WebGL/WebGPU 3D engine for the web

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playcanvas/engine

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declare const _default: "\n#include \"gsplatPackingPS\"\n\n// uniform declarations for dequantization\nuniform means_mins: vec3f;\nuniform means_maxs: vec3f;\n\nuniform scales_mins: f32;\nuniform scales_maxs: f32;\n\n// SH0 color uniforms\nuniform sh0_mins: f32;\nuniform sh0_maxs: f32;\n\n// SH0 texture for color\nvar packedSh0: texture_2d<f32>;\n\n// SH_C0 coefficient for 0th degree spherical harmonic\nconst SH_C0: f32 = 0.28209479177387814;\n\n// work value\nvar<private> packedSample: vec4<u32>;\n\nconst norm: f32 = sqrt(2.0);\n\n// read the model-space center of the gaussian\nfn getCenter() -> vec3f {\n // read the packed texture sample using generated load function (uses global splat.uv)\n packedSample = loadPackedTexture();\n\n let l = unpack8888(packedSample.x).xyz;\n let u = unpack8888(packedSample.y).xyz;\n let n = (l + u * 256.0) / 257.0;\n let v = mix(uniform.means_mins, uniform.means_maxs, n);\n\n return sign(v) * (exp(abs(v)) - 1.0);\n}\n\nfn getColor() -> vec4f {\n let clr = mix(half3(half(uniform.sh0_mins)), half3(half(uniform.sh0_maxs)), half3(unpack111110(pack8888(textureLoad(packedSh0, splat.uv, 0)))));\n let alpha = half(f32(packedSample.z & 0xffu) / 255.0);\n return vec4f(half4(half3(0.5) + clr * half(SH_C0), alpha));\n}\n\nfn getRotation() -> vec4f {\n let qdata = unpack8888(packedSample.z).xyz;\n let qmode = packedSample.w & 0x3u;\n let abc = (qdata - 0.5) * norm;\n let d = sqrt(max(0.0, 1.0 - dot(abc, abc)));\n\n var quat: vec4f;\n if (qmode == 0u) {\n quat = vec4f(d, abc);\n } else if (qmode == 1u) {\n quat = vec4f(abc.x, d, abc.y, abc.z);\n } else if (qmode == 2u) {\n quat = vec4f(abc.x, abc.y, d, abc.z);\n } else {\n quat = vec4f(abc.x, abc.y, abc.z, d);\n }\n return quat;\n}\n\nfn getScale() -> vec3f {\n let sdata = unpack101010(packedSample.w >> 2u);\n return exp(mix(vec3f(uniform.scales_mins), vec3f(uniform.scales_maxs), sdata));\n}\n\n#include \"gsplatSogSHVS\"\n"; export default _default;