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webgl-noise
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Forgot to add 'kludge' to 3D case. fixed.

master
ijm 2011-03-20 19:41:47 -07:00
parent d907d3daaa
commit 2b4faf3ad0
1 changed files with 9 additions and 7 deletions
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16
noise.glsl
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@ -8,8 +8,8 @@
// Distributed under the Artistic License 2.0; See LICENCE file.
//
#define NORMALIZE_GRADIENTS
#undef USE_CIRCLE
#define NORMALIZE_GRADIENTS
#undef USE_CIRCLE
#define COLLAPSE_SORTNET
float permute(float x0,vec3 p) {
@ -111,10 +111,12 @@ float simplexNoise3(vec3 v)
vec3 i2 = max( g.xyz, l.zxy);
#else
// Keeping this clean - let the compiler optimize.
// Force existance of strict total ordering in sort.
vec3 q0 = floor(x0 * 1024.0) + vec3( 0., 1./4., 2./4.);
vec3 q1;
q1.x = max(x0.x, x0.y);
q1.y = min(x0.x, x0.y);
q1.z = x0.z;
q1.x = max(q0.x, q0.y);
q1.y = min(q0.x, q0.y);
q1.z = q0.z;
vec3 q2;
q2.x = max(q1.x,q1.z);
@ -126,8 +128,8 @@ float simplexNoise3(vec3 v)
q3.z = min(q2.y, q2.z);
q3.x = q2.x;
vec3 i1 = vec3(equal(q3.xxx, x0));
vec3 i2 = i1 + vec3(equal(q3.yyy, x0));
vec3 i1 = vec3(lessThanEqual(q3.xxx, q0));
vec3 i2 = vec3(lessThanEqual(q3.yyy, q0));
#endif
// x0 = x0 - 0. + 0. * C