playcanvas
Version:
Open-source WebGL/WebGPU 3D engine for the web
43 lines (41 loc) • 1.32 kB
JavaScript
var glslCompactRead = `
uvec4 cachedTransformA;
vec3 getCenter() {
cachedTransformA = loadDataTransformA();
return vec3(uintBitsToFloat(cachedTransformA.r), uintBitsToFloat(cachedTransformA.g), uintBitsToFloat(cachedTransformA.b));
}
float getOpacity() {
return float(cachedTransformA.a >> 24u) / 255.0;
}
vec3 getColor() {
uint packed = loadDataColor().x;
float r = float(packed & 0x7FFu) * (4.0 / 2047.0);
float g = float((packed >> 11u) & 0x7FFu) * (4.0 / 2047.0);
float b = float((packed >> 22u) & 0x3FFu) * (4.0 / 1023.0);
return vec3(r, g, b);
}
vec4 getRotation() {
uint packed = loadDataTransformB().x;
vec3 p = vec3(
float(packed & 0x7FFu) / 2047.0 * 2.0 - 1.0,
float((packed >> 11u) & 0x7FFu) / 2047.0 * 2.0 - 1.0,
float((packed >> 22u) & 0x3FFu) / 1023.0 * 2.0 - 1.0
);
float d = dot(p, p);
return vec4(1.0 - d, sqrt(max(0.0, 2.0 - d)) * p);
}
vec3 getScale() {
uint packed = cachedTransformA.a;
float sx = float(packed & 0xFFu);
float sy = float((packed >> 8u) & 0xFFu);
float sz = float((packed >> 16u) & 0xFFu);
const float logRange = 21.0 / 255.0;
const float logMin = -12.0;
return vec3(
sx == 0.0 ? 0.0 : exp(sx * logRange + logMin),
sy == 0.0 ? 0.0 : exp(sy * logRange + logMin),
sz == 0.0 ? 0.0 : exp(sz * logRange + logMin)
);
}
`;
export { glslCompactRead as default };