// mathlib.h
typedef float vec_t;
+typedef vec_t vec2_t[2];
typedef vec_t vec3_t[3];
+typedef vec_t vec4_t[4];
typedef vec_t vec5_t[5];
+typedef vec_t vec6_t[6];
+typedef vec_t vec7_t[7];
+typedef vec_t vec8_t[8];
typedef int fixed4_t;
typedef int fixed8_t;
#define M_PI 3.14159265358979323846 // matches value in gcc v2 math.h
#endif
+#define DEG2RAD(a) ((a) * ((float) M_PI / 180.0f))
+#define RAD2DEG(a) ((a) * (180.0f / (float) M_PI))
+#define ANGLEMOD(a) (((int) ((a) * (65536.0f / 360.0f)) & 65535) * (360.0f / 65536.0f))
+
struct mplane_s;
extern vec3_t vec3_origin;
#define bound(min,num,max) (num >= min ? (num < max ? num : max) : min)
+#define VectorNegate(a,b) {b[0] = -(a[0]);b[1] = -(a[1]);b[2] = -(a[2]);}
+#define VectorSet(a,b,c,d) {d[0]=(a);d[1]=(b);d[2]=(c);}
+#define VectorClear(a) {a[0]=a[1]=a[2]=0;}
#define DotProduct(x,y) (x[0]*y[0]+x[1]*y[1]+x[2]*y[2])
#define VectorSubtract(a,b,c) {c[0]=a[0]-b[0];c[1]=a[1]-b[1];c[2]=a[2]-b[2];}
#define VectorAdd(a,b,c) {c[0]=a[0]+b[0];c[1]=a[1]+b[1];c[2]=a[2]+b[2];}
#define VectorNormalize(v) {float ilength = 1.0f / (float) sqrt(DotProduct(v,v));v[0] *= ilength;v[1] *= ilength;v[2] *= ilength;}
#define VectorNormalize2(v,dest) {float ilength = 1.0f / (float) sqrt(DotProduct(v,v));dest[0] = v[0] * ilength;dest[1] = v[1] * ilength;dest[2] = v[2] * ilength;}
#define VectorDistance2(a, b) ((a[0] - b[0]) * (a[0] - b[0]) + (a[1] - b[1]) * (a[1] - b[1]) + (a[2] - b[2]) * (a[2] - b[2]))
-#define VectorDistance(a, b) sqrt(VectorDistance(a,b))
+#define VectorDistance(a, b) (sqrt(VectorDistance2(a,b)))
#define VectorLength(a) sqrt(DotProduct(a, a))
+#define VectorScaleQuick(in, scale, out) {(out)[0] = (in)[0] * (scale);(out)[1] = (in)[1] * (scale);(out)[2] = (in)[2] * (scale);}
+#define VectorMAQuick(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];}
void VectorMA (vec3_t veca, float scale, vec3_t vecb, vec3_t vecc);
void VectorScale (vec3_t in, vec_t scale, vec3_t out);
int Q_log2(int val);
+#define NUMVERTEXNORMALS 162
+extern float m_bytenormals[NUMVERTEXNORMALS][3];
+
+byte NormalToByte(vec3_t n);
+void ByteToNormal(byte num, vec3_t n);
+
void R_ConcatRotations (float in1[3][3], float in2[3][3], float out[3][3]);
void R_ConcatTransforms (float in1[3][4], float in2[3][4], float out[3][4]);
int GreatestCommonDivisor (int i1, int i2);
void AngleVectors (vec3_t angles, vec3_t forward, vec3_t right, vec3_t up);
-float anglemod(float a);
+// LordHavoc: like AngleVectors, but taking a forward vector instead of angles, useful!
+void VectorVectors(const vec3_t forward, vec3_t right, vec3_t up);
void BoxOnPlaneSideClassify(struct mplane_s *p);