X-Git-Url: http://git.xonotic.org/?a=blobdiff_plain;f=mathlib.h;h=06a5ba9274c6970c87d2c5fd9aa25166aef22676;hb=085147ae858543e126aea6d7a43c00977b45784d;hp=85bf7b62a816469df1c9444874c7c096aea4c6ce;hpb=0d368b1865e1de4c00689959407d40bf6817233e;p=xonotic%2Fdarkplaces.git

diff --git a/mathlib.h b/mathlib.h
index 85bf7b62..06a5ba92 100644
--- a/mathlib.h
+++ b/mathlib.h
@@ -83,6 +83,8 @@ unsigned int CeilPowerOf2(unsigned int value);
 #define Vector2Copy(a,b) ((b)[0]=(a)[0],(b)[1]=(a)[1])
 #define Vector2Negate(a,b) ((b)[0]=-((a)[0]),(b)[1]=-((a)[1]))
 #define Vector2Set(a,b,c,d,e) ((a)[0]=(b),(a)[1]=(c))
+#define Vector2Scale(in, scale, out) ((out)[0] = (in)[0] * (scale),(out)[1] = (in)[1] * (scale))
+#define Vector2Normalize2(v,dest) {float ilength = (float) sqrt(DotProduct2((v),(v)));if (ilength) ilength = 1.0f / ilength;dest[0] = (v)[0] * ilength;dest[1] = (v)[1] * ilength;}
 
 #define DotProduct4(a,b) ((a)[0]*(b)[0]+(a)[1]*(b)[1]+(a)[2]*(b)[2]+(a)[3]*(b)[3])
 #define Vector4Clear(a) ((a)[0]=(a)[1]=(a)[2]=(a)[3]=0)
@@ -90,6 +92,13 @@ unsigned int CeilPowerOf2(unsigned int value);
 #define Vector4Copy(a,b) ((b)[0]=(a)[0],(b)[1]=(a)[1],(b)[2]=(a)[2],(b)[3]=(a)[3])
 #define Vector4Negate(a,b) ((b)[0]=-((a)[0]),(b)[1]=-((a)[1]),(b)[2]=-((a)[2]),(b)[3]=-((a)[3]))
 #define Vector4Set(a,b,c,d,e) ((a)[0]=(b),(a)[1]=(c),(a)[2]=(d),(a)[3]=(e))
+#define Vector4Normalize2(v,dest) {float ilength = (float) sqrt(DotProduct4((v),(v)));if (ilength) ilength = 1.0f / ilength;dest[0] = (v)[0] * ilength;dest[1] = (v)[1] * ilength;dest[2] = (v)[2] * ilength;dest[3] = (v)[3] * ilength;}
+#define Vector4Subtract(a,b,c) ((c)[0]=(a)[0]-(b)[0],(c)[1]=(a)[1]-(b)[1],(c)[2]=(a)[2]-(b)[2],(c)[3]=(a)[3]-(b)[3])
+#define Vector4Add(a,b,c) ((c)[0]=(a)[0]+(b)[0],(c)[1]=(a)[1]+(b)[1],(c)[2]=(a)[2]+(b)[2],(c)[3]=(a)[3]+(b)[3])
+#define Vector4Scale(in, scale, out) ((out)[0] = (in)[0] * (scale),(out)[1] = (in)[1] * (scale),(out)[2] = (in)[2] * (scale),(out)[3] = (in)[3] * (scale))
+#define Vector4Multiply(a,b,c) ((c)[0]=(a)[0]*(b)[0],(c)[1]=(a)[1]*(b)[1],(c)[2]=(a)[2]*(b)[2],(c)[3]=(a)[3]*(b)[3])
+#define Vector4MA(a, scale, b, c) ((c)[0] = (a)[0] + (scale) * (b)[0],(c)[1] = (a)[1] + (scale) * (b)[1],(c)[2] = (a)[2] + (scale) * (b)[2],(c)[3] = (a)[3] + (scale) * (b)[3])
+#define Vector4Lerp(v1,lerp,v2,c) ((c)[0] = (v1)[0] + (lerp) * ((v2)[0] - (v1)[0]), (c)[1] = (v1)[1] + (lerp) * ((v2)[1] - (v1)[1]), (c)[2] = (v1)[2] + (lerp) * ((v2)[2] - (v1)[2]), (c)[3] = (v1)[3] + (lerp) * ((v2)[3] - (v1)[3]))
 
 #define VectorNegate(a,b) ((b)[0]=-((a)[0]),(b)[1]=-((a)[1]),(b)[2]=-((a)[2]))
 #define VectorSet(a,b,c,d) ((a)[0]=(b),(a)[1]=(c),(a)[2]=(d))
@@ -166,6 +175,10 @@ int PointInfrontOfTriangle(const float *p, const float *a, const float *b, const
 }
 #endif
 
+#define lhcheeserand() (seed = (seed * 987211u) ^ (seed >> 13u) ^ 914867)
+#define lhcheeserandom(MIN,MAX) ((double)(lhcheeserand() + 0.5) / ((double)4096.0*1024.0*1024.0) * ((MAX)-(MIN)) + (MIN))
+#define VectorCheeseRandom(v) do{(v)[0] = lhcheeserandom(-1, 1);(v)[1] = lhcheeserandom(-1, 1);(v)[2] = lhcheeserandom(-1, 1);}while(DotProduct(v, v) > 1)
+
 /*
 // LordHavoc: quaternion math, untested, don't know if these are correct,
 // need to add conversion to/from matrices
@@ -278,5 +291,9 @@ int Math_atov(const char *s, vec3_t out);
 
 void BoxFromPoints(vec3_t mins, vec3_t maxs, int numpoints, vec_t *point3f);
 
+int LoopingFrameNumberFromDouble(double t, int loopframes);
+
+void Mathlib_Init(void);
+
 #endif