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, 9 insertions, 5 deletions

diff --git a/src/vulkan_utils.hpp b/src/vulkan_utils.hpp
index c822caa..54c82c5 100644
--- a/src/vulkan_utils.hpp
+++ b/src/vulkan_utils.hpp
@@ -39,7 +39,7 @@ struct Vertex {
         };
     }
 
-    static constexpr std::array<VkVertexInputAttributeDescription, 2> get_attr_descs() {
+    static constexpr std::array<VkVertexInputAttributeDescription, 3> get_attr_descs() {
         return {
             VkVertexInputAttributeDescription {
                 .location = 0,
@@ -53,19 +53,23 @@ struct Vertex {
                 .format   = VK_FORMAT_R32G32B32_SFLOAT,
                 .offset   = offsetof(Vertex, normal),
             },
+            VkVertexInputAttributeDescription {
+                .location = 2,
+                .binding  = 0,
+                .format   = VK_FORMAT_R32G32_SFLOAT,
+                .offset   = offsetof(Vertex, uv),
+            },
         };
     }
 
     engine::math::Vector3 pos;
     engine::math::Vector3 normal;
+    engine::math::Vector2 uv;
 };
 
 // TODO: move to a better place. Also, see TODOs for struct Vertex
 struct UniformBufferObject {
-    alignas(16) engine::math::Matrix4 model, view, proj;
-    // TODO: should me Matrix3, but it isn't implemented yet
-    alignas(16) engine::math::Matrix4 camera_rot;
-    alignas(16) engine::math::Vector3 camera_loc;
+    alignas(16) engine::math::Matrix4 model, view, proj, inv_view;
 };
 
 }