added textures for the hardware renderer

- removed "using" directive in .hpp
- reverse order of arguments for quaternion rotation, i.e. q.rot(v)
  instead of v.rot(q), where q is a quaterinon and v a vector
- pass the inverse of the view matrix to render_and_present_frame, to
  allow light calculation in shaders (we used to just pass the matrix of
  the quaternion of the transformation, i.e. discard scaling and
  translations)
- added another mesh and texture (viking_room) for testing purposes
- added transparent background option
- added Quaternion::look_towards(), which is the equivalent of
  Matrix4::look_at() but only for rotations
- various improvement to .obj parsing
- load texture coordinates from .obj file
- merged duplicate vertices in Mesh::linearize_indices()

1 files changed, 1 insertions, 3 deletions

diff --git a/src/o3d/deriv_vertex.hpp b/src/o3d/deriv_vertex.hpp
index 6fc32e0..5e8dc22 100644
--- a/src/o3d/deriv_vertex.hpp
+++ b/src/o3d/deriv_vertex.hpp
@@ -5,10 +5,8 @@
 
 namespace engine::o3d {
 
-using engine::math::Vector4;
-
 struct DerivedVertex {
-    Vector4 vertex;
+    engine::math::Vector4 vertex;
     float b0, b1;
 
     constexpr DerivedVertex div_by_w() const & {