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playcanvas

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

playcanvas.com

playcanvas/engine

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declare const _default: "\nvoid writeSplat(vec3 center, vec4 rotation, vec3 scale, vec4 color) {\n // Pack RGB as 11+11+10 bits into R32U, range [0, 4]\n vec3 rgb = clamp(color.rgb, 0.0, 4.0);\n uint rBits = uint(rgb.r * (2047.0 / 4.0) + 0.5);\n uint gBits = uint(rgb.g * (2047.0 / 4.0) + 0.5);\n uint bBits = uint(rgb.b * (1023.0 / 4.0) + 0.5);\n writeDataColor(uvec4(rBits | (gBits << 11u) | (bBits << 22u), 0u, 0u, 0u));\n\n #ifndef GSPLAT_COLOR_ONLY\n // Half-angle quaternion projection: rotation is (x,y,z,w) with w >= 0\n vec4 q = rotation;\n if (q.w < 0.0) q = -q;\n vec3 p = q.xyz * inversesqrt(1.0 + q.w);\n\n // quantize from [-1, 1] to 11+11+10 bits\n uint aBitsQ = uint(clamp((p.x * 0.5 + 0.5) * 2047.0 + 0.5, 0.0, 2047.0));\n uint bBitsQ = uint(clamp((p.y * 0.5 + 0.5) * 2047.0 + 0.5, 0.0, 2047.0));\n uint cBitsQ = uint(clamp((p.z * 0.5 + 0.5) * 1023.0 + 0.5, 0.0, 1023.0));\n uint packedQuat = aBitsQ | (bBitsQ << 11u) | (cBitsQ << 22u);\n\n // Log-encode scale (3x8 bits) + alpha (8 bits) into dataTransformA.w\n const float invLogRange = 255.0 / 21.0;\n const float logMin = -12.0;\n uint sxBits = scale.x < 1e-10 ? 0u : uint(clamp((log(scale.x) - logMin) * invLogRange + 0.5, 1.0, 255.0));\n uint syBits = scale.y < 1e-10 ? 0u : uint(clamp((log(scale.y) - logMin) * invLogRange + 0.5, 1.0, 255.0));\n uint szBits = scale.z < 1e-10 ? 0u : uint(clamp((log(scale.z) - logMin) * invLogRange + 0.5, 1.0, 255.0));\n uint alphaBits = uint(clamp(color.a, 0.0, 1.0) * 255.0 + 0.5);\n uint packedScaleAlpha = sxBits | (syBits << 8u) | (szBits << 16u) | (alphaBits << 24u);\n\n writeDataTransformA(uvec4(floatBitsToUint(center.x), floatBitsToUint(center.y), floatBitsToUint(center.z), packedScaleAlpha));\n\n writeDataTransformB(uvec4(packedQuat, 0u, 0u, 0u));\n #endif\n}\n"; export default _default;