various improvements

- cleaned up the computation of the camera's matrix
- changed VertexData to being a struct which transmit data between the "vertex shader" and the "fragment shader"
- started working on keyboard and mouse controls
- added fov (field of view)
- changed quaternion to euler angles conversion, from zyx to zxy
- fixed computations of z coordinates in triangle rendering
- improved naming in the triangle rasterizer

1 files changed, 13 insertions, 14 deletions

diff --git a/src/o3d/mesh.cpp b/src/o3d/mesh.cpp
index 60c7f8b..2423e88 100644
--- a/src/o3d/mesh.cpp
+++ b/src/o3d/mesh.cpp
@@ -6,26 +6,25 @@
 
 using namespace engine::o3d;
 
-Mesh Mesh::plane() {
+Mesh Mesh::plane(float width, float height) {
+    const float w2 = width / 2,
+                h2 = height / 2;
     return {
         {
-            {-1.f, 0.f, -1.f, 1.f},
-            {+1.f, 0.f, -1.f, 1.f},
-            {+1.f, 0.f, +1.f, 1.f},
-            {-1.f, 0.f, +1.f, 1.f},
+            {-w2 / 2, 0.f, -h2 / 2, 1.f},
+            {+w2 / 2, 0.f, -h2 / 2, 1.f},
+            {+w2 / 2, 0.f, +h2 / 2, 1.f},
+            {-w2 / 2, 0.f, +h2 / 2, 1.f},
         },
-        { {0.f, 0.f, -1.f} },
         {
-            {0.f, 0.f},
-            {1.f, 0.f},
-            {1.f, 1.f},
-            {0.f, 1.f},
+            {0.f, -1.f, 0.f},
+            {0.f, +1.f, 0.f},
         },
         {
-            {{ {{0, 0, 0}}, {{1, 0, 1}}, {{2, 0, 2}} }},
-            {{ {{2, 0, 2}}, {{3, 0, 3}}, {{0, 0, 0}} }},
-            {{ {{0, 0, 0}}, {{3, 0, 3}}, {{2, 0, 2}} }},
-            {{ {{2, 0, 2}}, {{1, 0, 1}}, {{0, 0, 0}} }},
+            {{ {{0, 0}}, {{1, 0}}, {{2, 0}} }},
+            {{ {{2, 0}}, {{3, 0}}, {{0, 0}} }},
+            {{ {{0, 1}}, {{3, 1}}, {{2, 1}} }},
+            {{ {{2, 1}}, {{1, 1}}, {{0, 1}} }},
         }
     };
 }