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Fix T51951: cell noise texture precision issue at unit vertex coordinates. 

Solution is to bias the coordinates a little, same as Cycles checker texture.
This commit is contained in:
Brecht Van Lommel 2017-07-02 21:53:23 +02:00
parent e3e5ecfaa8
commit 3232d8ec8f
Notes: blender-bot 2023-02-14 06:49:54 +01:00 
Referenced by issue #51951, Texture overlapping in BI
1 changed files with 10 additions and 0 deletions
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10
source/blender/blenlib/intern/noise.c
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@ -1394,6 +1394,11 @@ static float voronoi_CrS(float x, float y, float z)
/* returns unsigned cellnoise */
static float cellNoiseU(float x, float y, float z)
{
/* avoid precision issues on unit coordinates */
x = (x + 0.000001f)*0.999999f;
y = (y + 0.000001f)*0.999999f;
z = (z + 0.000001f)*0.999999f;
int xi = (int)(floor(x));
int yi = (int)(floor(y));
int zi = (int)(floor(z));
@ -1411,6 +1416,11 @@ float cellNoise(float x, float y, float z)
/* returns a vector/point/color in ca, using point hasharray directly */
void cellNoiseV(float x, float y, float z, float ca[3])
{
/* avoid precision issues on unit coordinates */
x = (x + 0.000001f)*0.999999f;
y = (y + 0.000001f)*0.999999f;
z = (z + 0.000001f)*0.999999f;
int xi = (int)(floor(x));
int yi = (int)(floor(y));
int zi = (int)(floor(z));