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glm__noiseDetail_taylorInvSqrt

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Marcin
2025-01-22 15:32:50 +00:00
parent b79347eb13
commit 9cfa40f423
1 changed files with 6 additions and 5 deletions
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11
include/cglm/noise.h
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@@ -57,11 +57,12 @@
}
/* glm__noiseDetail_taylorInvSqrt(vec4 x, vec4 dest) */
#define glm__noiseDetail_taylorInvSqrt(x, dest) { \
dest[0] = 1.79284291400159f - 0.85373472095314f * x[0]; \
dest[1] = 1.79284291400159f - 0.85373472095314f * x[1]; \
dest[2] = 1.79284291400159f - 0.85373472095314f * x[2]; \
dest[3] = 1.79284291400159f - 0.85373472095314f * x[3]; \
#define glm__noiseDetail_taylorInvSqrt(x, dest) { \
/* dest = 1.79284291400159f - 0.85373472095314f * x */ \
vec4 temp; \
glm_vec4_scale(x, 0.85373472095314f, temp); /* temp = 0.853...f * x */ \
glm_vec4_fill(dest, 1.79284291400159f); /* dest = 1.792...f */ \
glm_vec4_sub(dest, temp, dest); /* dest = 1.79284291400159f - temp */ \
}
/* norm = taylorInvSqrt(vec4(