Prevent transform of noise3d result in getBlockSeed2

kwolekr · kwolekr · commit b0efb8f3b235 · 2015-01-12T15:46:04.000-05:00
diff --git a/src/mapgen.cpp b/src/mapgen.cpp
@@ -112,7 +112,9 @@ u32 Mapgen::getBlockSeed(v3s16 p, int seed)
 
 u32 Mapgen::getBlockSeed2(v3s16 p, int seed)
 {
-	return noise3d(p.X, p.Y, p.Z, seed);
+	u32 n = 1619 * p.X + 31337 * p.Y + 52591 * p.Z + 1013 * seed;
+	n = (n >> 13) ^ n;
+	return (n * (n * n * 60493 + 19990303) + 1376312589);
 }
 
 

Original file line number	Diff line number	Diff line change
`@@ -112,7 +112,9 @@ u32 Mapgen::getBlockSeed(v3s16 p, int seed)`
`112`	`112`
`113`	`113`	`u32 Mapgen::getBlockSeed2(v3s16 p, int seed)`
`114`	`114`	`{`
`115`		`- return noise3d(p.X, p.Y, p.Z, seed);`
	`115`	`+ u32 n = 1619 * p.X + 31337 * p.Y + 52591 * p.Z + 1013 * seed;`
	`116`	`+ n = (n >> 13) ^ n;`
	`117`	`+ return (n * (n * n * 60493 + 19990303) + 1376312589);`
`116`	`118`	`}`
`117`	`119`
`118`	`120`