X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=model.h;h=811f3a12034c92634abc504902e02bfbceb179ed;hb=456d49acc5e8a2601b8a86317af78355324d8971;hp=8f90d128ad0a9637edb7a2624eed66ee1c2cc35b;hpb=b4a83d4fcab39bee5a8cd6e8e6eec06314864e5b;p=carveJwlIkooP6JGAAIwe30JlM.git

diff --git a/model.h b/model.h
index 8f90d12..811f3a1 100644
--- a/model.h
+++ b/model.h
@@ -77,6 +77,34 @@ struct mdl_transform
    v4f q;
 };
 
+static void transform_identity( mdl_transform *transform )
+{
+   v3_zero( transform->co );
+   q_identity( transform->q );
+   v3_fill( transform->s, 1.0f );
+}
+
+static void mdl_transform_vector( mdl_transform *transform, v3f vec, v3f dest )
+{
+   v3_mul( transform->s, vec, dest );
+   q_mulv( transform->q, dest, dest );
+}
+
+static void mdl_transform_point( mdl_transform *transform, v3f co, v3f dest )
+{
+   mdl_transform_vector( transform, co, dest );
+   v3_add( transform->co, dest, dest );
+}
+
+static void mdl_transform_mul( mdl_transform *a, mdl_transform *b, 
+                               mdl_transform *d )
+{
+   mdl_transform_point( a, b->co, d->co );
+   q_mul( a->q, b->q, d->q );
+   q_normalize( d->q );
+   v3_mul( a->s, b->s, d->s );
+}
+
 struct mdl_material
 {
    u32 pstr_name,