X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=blobdiff_plain;f=src%2Fnoise.c;fp=src%2Fnoise.c;h=63bfa82e5e3851daf5140a6e1dd47bb81298de02;hp=4401e5ab4d466bc44dd706e7f60e336059764f53;hb=574b83282bd01d6b9a70843238bbcbab1590fe76;hpb=fb3df30d97e3824335a6c17fd8d49b9706b6b3c7

diff --git a/src/noise.c b/src/noise.c
index 4401e5a..63bfa82 100644
--- a/src/noise.c
+++ b/src/noise.c
@@ -186,12 +186,12 @@ float noise3(float x, float y, float z)
 	c = lerp(a, b, sy);
 
 	/* interpolate along the bottom slice of the cell */
-	u = dotgrad3(grad3[b00 + bz0], rx0, ry0, rz1);
-	v = dotgrad3(grad3[b10 + bz0], rx1, ry0, rz1);
+	u = dotgrad3(grad3[b00 + bz1], rx0, ry0, rz1);
+	v = dotgrad3(grad3[b10 + bz1], rx1, ry0, rz1);
 	a = lerp(u, v, sx);
 
-	u = dotgrad3(grad3[b01 + bz0], rx0, ry1, rz1);
-	v = dotgrad3(grad3[b11 + bz0], rx1, ry1, rz1);
+	u = dotgrad3(grad3[b01 + bz1], rx0, ry1, rz1);
+	v = dotgrad3(grad3[b11 + bz1], rx1, ry1, rz1);
 	b = lerp(u, v, sx);
 
 	d = lerp(a, b, sy);
@@ -298,12 +298,12 @@ float pnoise3(float x, float y, float z, int per_x, int per_y, int per_z)
 	c = lerp(a, b, sy);
 
 	/* interpolate along the bottom slice of the cell */
-	u = dotgrad3(grad3[b00 + bz0], rx0, ry0, rz1);
-	v = dotgrad3(grad3[b10 + bz0], rx1, ry0, rz1);
+	u = dotgrad3(grad3[b00 + bz1], rx0, ry0, rz1);
+	v = dotgrad3(grad3[b10 + bz1], rx1, ry0, rz1);
 	a = lerp(u, v, sx);
 
-	u = dotgrad3(grad3[b01 + bz0], rx0, ry1, rz1);
-	v = dotgrad3(grad3[b11 + bz0], rx1, ry1, rz1);
+	u = dotgrad3(grad3[b01 + bz1], rx0, ry1, rz1);
+	v = dotgrad3(grad3[b11 + bz1], rx1, ry1, rz1);
 	b = lerp(u, v, sx);
 
 	d = lerp(a, b, sy);