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-rw-r--r--libdimension/triangle.c42
1 files changed, 19 insertions, 23 deletions
diff --git a/libdimension/triangle.c b/libdimension/triangle.c
index 94a6a95..8e584d8 100644
--- a/libdimension/triangle.c
+++ b/libdimension/triangle.c
@@ -64,15 +64,24 @@ dmnsn_triangle_inside_fn(const dmnsn_object *triangle, dmnsn_vector point)
return false;
}
+dmnsn_object *
+dmnsn_new_triangle(dmnsn_pool *pool, dmnsn_vector vertices[3])
+{
+ dmnsn_vector normal = dmnsn_vector_cross(
+ dmnsn_vector_sub(vertices[1], vertices[0]),
+ dmnsn_vector_sub(vertices[2], vertices[0])
+ );
+ dmnsn_vector normals[] = { normal, normal, normal };
+ return dmnsn_new_smooth_triangle(pool, vertices, normals);
+}
+
/* Allocate a new triangle */
dmnsn_object *
-dmnsn_new_triangle(dmnsn_pool *pool,
- dmnsn_vector a, dmnsn_vector b, dmnsn_vector c,
- dmnsn_vector na, dmnsn_vector nb, dmnsn_vector nc)
+dmnsn_new_smooth_triangle(dmnsn_pool *pool, dmnsn_vector vertices[3], dmnsn_vector normals[3])
{
- na = dmnsn_vector_normalized(na);
- nb = dmnsn_vector_normalized(nb);
- nc = dmnsn_vector_normalized(nc);
+ dmnsn_vector na = dmnsn_vector_normalized(normals[0]);
+ dmnsn_vector nb = dmnsn_vector_normalized(normals[1]);
+ dmnsn_vector nc = dmnsn_vector_normalized(normals[2]);
dmnsn_triangle *triangle = DMNSN_PALLOC(pool, dmnsn_triangle);
triangle->na = na;
@@ -81,7 +90,7 @@ dmnsn_new_triangle(dmnsn_pool *pool,
dmnsn_object *object = &triangle->object;
dmnsn_init_object(pool, object);
- object->intersection_fn = dmnsn_triangle_intersection_fn;
+ object->intersection_fn = dmnsn_triangle_intersection_fn;
object->inside_fn = dmnsn_triangle_inside_fn;
object->bounding_box.min = dmnsn_zero;
object->bounding_box.max = dmnsn_new_vector(1.0, 1.0, 0.0);
@@ -92,23 +101,10 @@ dmnsn_new_triangle(dmnsn_pool *pool,
* The new vector space has corners at <0, 1, 0>, <0, 0, 1>, and 0,
* corresponding to the basis (ab, ac, ab X ac).
*/
- dmnsn_vector ab = dmnsn_vector_sub(b, a);
- dmnsn_vector ac = dmnsn_vector_sub(c, a);
+ dmnsn_vector ab = dmnsn_vector_sub(vertices[1], vertices[0]);
+ dmnsn_vector ac = dmnsn_vector_sub(vertices[2], vertices[0]);
dmnsn_vector normal = dmnsn_vector_cross(ab, ac);
- object->intrinsic_trans = dmnsn_new_matrix4(ab, ac, normal, a);
+ object->intrinsic_trans = dmnsn_new_matrix4(ab, ac, normal, vertices[0]);
return object;
}
-
-/* Allocate a new flat triangle */
-dmnsn_object *
-dmnsn_new_flat_triangle(dmnsn_pool *pool, dmnsn_vector a, dmnsn_vector b, dmnsn_vector c)
-{
- /* Flat triangles are just smooth triangles with identical normals at all
- verticies */
- dmnsn_vector normal = dmnsn_vector_cross(
- dmnsn_vector_sub(b, a),
- dmnsn_vector_sub(c, a)
- );
- return dmnsn_new_triangle(pool, a, b, c, normal, normal, normal);
-}