X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=blobdiff_plain;f=src%2Fvmath.h;h=463fea6e32ef6e0bbd8ad5611be235cae15622fa;hp=6d1add9a1d89b850b93f60e9e29fe84254b7f1c6;hb=fcac764d752234a03df536dd408235170394f6ad;hpb=b546d1a5227ee3a263447e279434842d230f700a

diff --git a/src/vmath.h b/src/vmath.h
index 6d1add9..463fea6 100644
--- a/src/vmath.h
+++ b/src/vmath.h
@@ -126,4 +126,37 @@ static INLINE quat_t quat_rotate(quat_t q, float angle, float x, float y, float
 	return quat_mul(q, rq);
 }
 
+static INLINE void mat4_transpose(float *mat)
+{
+	int i, j;
+
+	for(i=0; i<4; i++) {
+		for(j=0; j<i; j++) {
+			int rowidx = i * 4 + j;
+			int colidx = j * 4 + i;
+			float tmp = mat[rowidx];
+			mat[rowidx] = mat[colidx];
+			mat[colidx] = tmp;
+		}
+	}
+}
+
+/* misc stuff */
+static vec3_t INLINE sphrand(float rad)
+{
+	vec3_t res;
+
+	float u = (float)rand() / RAND_MAX;
+	float v = (float)rand() / RAND_MAX;
+
+	float theta = 2.0f * M_PI * u;
+	float phi = acos(2.0f * v - 1.0f);
+
+	res.x = rad * cos(theta) * sin(phi);
+	res.y = rad * sin(theta) * sin(phi);
+	res.z = rad * cos(phi);
+
+	return res;
+}
+
 #endif	/* VMATH_H_ */