perlin

[vg.git] / vg_m.h

diff --git a/vg_m.h b/vg_m.h
index 3c78466b68ca046f23890a14aaf033bf36f3be55..2a5082d9b813c53687fb60254b47b5c141836caa 100644 (file)
--- a/vg_m.h
+++ b/vg_m.h
@@ -269,6 +269,11 @@ static inline void v3_add( v3f a, v3f b, v3f d )
    d[0] = a[0]+b[0]; d[1] = a[1]+b[1]; d[2] = a[2]+b[2];
 }
 
+static inline void v3i_add( v3i a, v3i b, v3i d )
+{
+   d[0] = a[0]+b[0]; d[1] = a[1]+b[1]; d[2] = a[2]+b[2];
+}
+
 static inline void v4_add( v4f a, v4f b, v4f d )
 {
    d[0] = a[0]+b[0]; 
@@ -282,6 +287,11 @@ static inline void v3_sub( v3f a, v3f b, v3f d )
    d[0] = a[0]-b[0]; d[1] = a[1]-b[1]; d[2] = a[2]-b[2];
 }
 
+static inline void v3i_sub( v3i a, v3i b, v3i d )
+{
+   d[0] = a[0]-b[0]; d[1] = a[1]-b[1]; d[2] = a[2]-b[2];
+}
+
 static inline void v3_mul( v3f a, v3f b, v3f d )
 {
    d[0] = a[0]*b[0]; d[1] = a[1]*b[1]; d[2] = a[2]*b[2];
@@ -1376,8 +1386,7 @@ static inline void q_inv( v4f q, v4f d )
 
 static inline void q_nlerp( v4f a, v4f b, float t, v4f d )
 {
-   if( v4_dot(a,b) < 0.0f )
-   {
+   if( v4_dot(a,b) < 0.0f ){
       v4_muls( b, -1.0f, d );
       v4_lerp( a, d, t, d );
    }
@@ -2036,6 +2045,7 @@ static int spherecast_triangle( v3f tri[3],
 
 static inline float vg_randf(void)
 {
+   /* TODO: replace with our own rand */
    return (float)rand()/(float)(RAND_MAX);
 }
 
@@ -2073,4 +2083,13 @@ static void eval_bezier_time( v3f p0, v3f p1, v3f h0, v3f h1, float t, v3f p )
    v3_muladds( p, p0, 3.0f*tt  -ttt -3.0f*t +1.0f, p );
 }
 
+static void eval_bezier3( v3f p0, v3f p1, v3f p2, float t, v3f p )
+{
+   float u = 1.0f-t;
+
+   v3_muls( p0, u*u, p );
+   v3_muladds( p, p1, 2.0f*u*t, p );
+   v3_muladds( p, p2, t*t, p );
+}
+
 #endif /* VG_M_H */