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, 6 insertions, 8 deletions

diff --git a/src/obj_parser.cpp b/src/obj_parser.cpp
index ad71935..f765f5c 100644
--- a/src/obj_parser.cpp
+++ b/src/obj_parser.cpp
@@ -34,7 +34,7 @@ float parse_float(const std::string& s) {
         if (s[ind++] == '-')
             positive = !positive;
 
-    // improve error checking
+    // TODO: improve error checking
     if (ind == s.length())
         return 0.f;
 
@@ -45,7 +45,7 @@ float parse_float(const std::string& s) {
     if (ind == s.length())
         return (positive ? 1.f : -1.f) * static_cast<float>(n);
 
-    // improve error checking
+    // TODO: improve error checking
     if (s[ind] != '.')
         return 0.f;
 
@@ -58,7 +58,7 @@ float parse_float(const std::string& s) {
         decimal_fac *= .1f;
     }
 
-    // improve error checking
+    // TODO: improve error checking
     if (ind != s.length())
         return 0.f;
 
@@ -72,7 +72,7 @@ float parse_int(const std::string& s) {
         if (s[ind++] == '-')
             positive = !positive;
 
-    // improve error checking
+    // TODO: improve error checking
     if (ind == s.length())
         return 0.f;
 
@@ -80,7 +80,7 @@ float parse_int(const std::string& s) {
     while (ind < s.length() && s[ind] >= '0' && s[ind] <= '9')
         n = n * 10 + static_cast<int>(s[ind++]) - static_cast<int>('0');
 
-    // improve error checking
+    // TODO: improve error checking
     if (ind != s.length())
         return 0.f;
 
@@ -91,7 +91,6 @@ float parse_int(const std::string& s) {
 
 o3d::Mesh parse_object(const std::string& obj_path) {
     o3d::Mesh mesh;
-    mesh.vertices_data.push_back(o3d::VertexData(0.f, 0.f));
     std::ifstream obj_file(obj_path);
     std::string line;
     while (std::getline(obj_file, line)) {
@@ -119,13 +118,12 @@ o3d::Mesh parse_object(const std::string& obj_path) {
             // }
             // std::cout << "Smooth: " << std::boolalpha << smooth << std::endl;
         } else if (line.rfind("f ", 0) == 0) {
-            std::array<std::array<std::size_t, 3>, 3> indices;
+            std::array<std::array<std::size_t, 2>, 3> indices;
             auto line_split = split(line.substr(2), ' ');
             for (int i = 0; i < 3; i++) {
                 auto indices_s_group = split(line_split[i], '/');
                 indices[i][0] = parse_int(indices_s_group[0]) - 1;
                 indices[i][1] = parse_int(indices_s_group[2]) - 1;
-                indices[i][2] = 0;
             }
             // std::cout << "Face:"
             //     << " 1: vertex: " << indices[0][0] << " normal: " << indices[0][1]