FastLED 3.9.15
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◆ grad() [2/4]

static int32_t grad ( uint8_t hash,
int32_t x,
int32_t y )
static

Definition at line 83 of file simplex.cpp.

83 {
84 uint8_t h = hash & 7; // Convert low 3 bits of hash code
85 int32_t u = h < 4 ? x : y; // into 8 simple gradient directions,
86 int32_t v = h < 4 ? y : x; // and compute the dot product with (x,y).
87 return ((h&1) != 0 ? -u : u) + ((h&2) != 0 ? -2*v : 2*v);
88}
int y
Definition simple.h:93
int x
Definition simple.h:92

References x, and y.