heebie

[vg.git] / vg_m.h

diff --git a/vg_m.h b/vg_m.h
index 4844eeb20b2664eb5521a86065f309f92cb2ce5a..3c78466b68ca046f23890a14aaf033bf36f3be55 100644 (file)
--- a/vg_m.h
+++ b/vg_m.h
@@ -1302,6 +1302,22 @@ int plane_intersect2( v4f a, v4f b, v3f p, v3f n )
    return 1;
 }
 
+static int plane_segment( v4f plane, v3f a, v3f b, v3f co )
+{
+   float d0 = v3_dot( a, plane ) - plane[3],
+         d1 = v3_dot( b, plane ) - plane[3];
+
+   if( d0*d1 < 0.0f )
+   {
+      float tot = 1.0f/( fabsf(d0)+fabsf(d1) );
+
+      v3_muls( a, fabsf(d1) * tot, co );
+      v3_muladds( co, b, fabsf(d0) * tot, co );
+      return 1;
+   }
+
+   return 0;
+}
 
 static inline double plane_polarity( double p[4], double a[3] )
 {
@@ -1455,6 +1471,18 @@ static void m3x3_q( m3x3f m, v4f q )
    }
 }
 
+static void q_mulv( v4f q, v3f v, v3f d )
+{
+   v3f v1, v2;
+
+   v3_muls( q, 2.0f*v3_dot(q,v), v1 );
+   v3_muls( v, q[3]*q[3] - v3_dot(q,q), v2 );
+   v3_add( v1, v2, v1 );
+   v3_cross( q, v, v2 );
+   v3_muls( v2, 2.0f*q[3], v2 );
+   v3_add( v1, v2, d );
+}
+
 enum contact_type
 {
    k_contact_type_default,
@@ -1549,6 +1577,15 @@ VG_STATIC float closest_segment_segment( v3f p1, v3f q1, v3f p2, v3f q2,
    return v3_length2( v0 );
 }
 
+VG_STATIC int point_inside_aabb( boxf box, v3f point )
+{
+   if((point[0]<=box[1][0]) && (point[1]<=box[1][1]) && (point[2]<=box[1][2]) &&
+      (point[0]>=box[0][0]) && (point[1]>=box[0][1]) && (point[2]>=box[0][2]) )
+      return 1;
+   else
+      return 0;
+}
+
 VG_STATIC void closest_point_aabb( v3f p, boxf box, v3f dest )
 {
    v3_maxv( p, box[0], dest );