Print done when done.

1 files changed, 66 insertions, 0 deletions

diff --git a/indra/newview/noise.cpp b/indra/newview/noise.cpp
new file mode 100644
index 0000000000..d2e837a5a7
--- /dev/null
+++ b/indra/newview/noise.cpp
@@ -0,0 +1,66 @@
+/** 
+ * @file noise.cpp
+ * @brief Perlin noise routines for procedural textures, etc
+ *
+ * Copyright (c) 2000-$CurrentYear$, Linden Research, Inc.
+ * $License$
+ */
+
+#include "llviewerprecompiledheaders.h"
+
+#include "noise.h"
+
+#include "llrand.h"
+
+// static
+#define B 0x100
+S32 p[B + B + 2];
+F32 g3[B + B + 2][3];
+F32 g2[B + B + 2][2];
+F32 g1[B + B + 2];
+S32 gNoiseStart = 1;
+
+
+F32 noise2(F32 *vec)
+{
+	U8 bx0, bx1, by0, by1;
+	U32 b00, b10, b01, b11;
+	F32 rx0, rx1, ry0, ry1, *q, sx, sy, a, b, u, v;
+	S32 i, j;
+
+	if (gNoiseStart) {
+		gNoiseStart = 0;
+		init();
+	}
+
+
+	fast_setup(*vec, bx0, bx1, rx0, rx1);
+	fast_setup(*(vec + 1), by0, by1, ry0, ry1);
+
+	i = *(p + bx0);
+	j = *(p + bx1);
+
+	b00 = *(p + i + by0);
+	b10 = *(p + j + by0);
+	b01 = *(p + i + by1);
+	b11 = *(p + j + by1);
+
+	sx = s_curve(rx0);
+	sy = s_curve(ry0);
+
+
+	q = *(g2 + b00);
+	u = fast_at2(rx0, ry0, q);
+	q = *(g2 + b10); 
+	v = fast_at2(rx1, ry0, q);
+	a = lerp_m(sx, u, v);
+
+	q = *(g2 + b01); 
+	u = fast_at2(rx0,ry1,q);
+	q = *(g2 + b11); 
+	v = fast_at2(rx1,ry1,q);
+	b = lerp_m(sx, u, v);
+
+	return lerp_m(sy, a, b);
+}
+