fix OrthoCamera and prepared initial scene

include/Common.h

@@ -24,4 +24,5 @@ struct Color {
     float A;
 };
 
-const Color Color_White = Color{1.f, 1.f, 1.f, 1.f};
+const Color Color_White = Color{1.f, 1.f, 1.f, 1.f};
+const Color Color_Red   = Color{1.f, 0.f, 0.f, 1.f};

include/OrthoCamera.h

@@ -4,14 +4,19 @@
 class OrthoCamera 
 {
 public:
-    OrthoCamera(int w, int h) ;
+    OrthoCamera(int w, int h, float InOrthoSize) ;
     glm::mat4 GetViewProjMat() const;
-    int GetWidth() const;
-    int GetHeight() const;
+    int GetResoWidth() const;
+    int GetResoHeight() const;
+    float GetOrthoWidth() const;
+    float GetOrthoHeight() const;
 private:
     glm::mat4 View;
     glm::mat4 Proj;
     glm::mat4 ViewProj;
     int Width;
     int Height;
+
+    float OrthoWidth;
+    float OrthoHeight;
 };

include/Quad.h

@@ -5,7 +5,7 @@
 class Quad 
 {
 public:
-    Quad(int w, int h) 
+    Quad(float w, float h) 
     : Position(glm::vec3(0)), 
       Rotation(glm::vec3(0)), 
       Scale(glm::vec3(w, h, 0)),

src/OGLQuadRenderer.cpp

@@ -12,10 +12,10 @@ OGLQuadRender::OGLQuadRender()
 
         std::vector<float> Vertices = {
             0.5f, -0.5f, 0.0f, //bottom right
-        -0.5f, -0.5f, 0.0f, //bottom left
-        -0.5f,  0.5f, 0.0f, //top left
+           -0.5f, -0.5f, 0.0f, //bottom left
+           -0.5f,  0.5f, 0.0f, //top left
 
-        -0.5f,  0.5f, 0.0f, //top left
+           -0.5f,  0.5f, 0.0f, //top left
             0.5f,  0.5f, 0.0f, //top right
             0.5f, -0.5f, 0.0f  //bottom right
     };
@@ -41,7 +41,7 @@ OGLQuadRender::OGLQuadRender()
 
 void OGLQuadRender::Draw(const std::vector<Quad*>& Quads, const OrthoCamera* Cam) 
 {
-    glViewport(0, 0, Cam->GetWidth(), Cam->GetHeight());
+    glViewport(0, 0, Cam->GetResoWidth(), Cam->GetResoHeight());
     glClear(GL_COLOR_BUFFER_BIT);
 
     glBindVertexArray(Vao);

src/OrthoCamera.cpp

@@ -2,7 +2,7 @@
 #include <glm/glm.hpp>
 #include <glm/ext.hpp>
 
-OrthoCamera::OrthoCamera(int w, int h) 
+OrthoCamera::OrthoCamera(int w, int h, float InOrthoSize) 
 {   
     Width = w;
     Height = h;
@@ -12,10 +12,17 @@ OrthoCamera::OrthoCamera(int w, int h)
     auto Up = glm::vec3(0.f, 1.f, 0.f);
     View = glm::lookAt(Pos, Pos + Dir, Up);
 
-    float left = 0;
-    float right = w;
-    float bottom = 0;
-    float top = h;
+    float Aspect = (float)Width / (float)Height;
+    OrthoWidth = InOrthoSize * Aspect;
+    OrthoHeight = InOrthoSize;
+
+    float HalfW = OrthoWidth * 0.5f;
+    float HalfH = OrthoHeight * 0.5f;
+
+    float left = -HalfW;
+    float right = HalfW;
+    float bottom = -HalfH;
+    float top = HalfH;
     Proj = glm::ortho(left, right, bottom, top, 0.f, 100.f);
 
     ViewProj =  Proj * View;
@@ -26,13 +33,22 @@ glm::mat4 OrthoCamera::GetViewProjMat() const
     return ViewProj;
 }
 
-int OrthoCamera::GetWidth() const 
+int OrthoCamera::GetResoWidth() const 
 { 
     return Width; 
 }
 
-int OrthoCamera::GetHeight() const 
+int OrthoCamera::GetResoHeight() const 
 { 
     return Height; 
 }
 
+float OrthoCamera::GetOrthoWidth() const
+{
+    return OrthoWidth;
+}
+float OrthoCamera::GetOrthoHeight() const
+{
+    return OrthoHeight;
+}
+

src/PlatformScene.cpp

@@ -4,16 +4,17 @@
 
 void PlatformScene::Start() 
 {
-    Camera = new OrthoCamera(Win.GetWidth(), Win.GetHeight());
+    Camera = new OrthoCamera(Win.GetWidth(), Win.GetHeight(), 10);
 
-    Quad* Q1 = new Quad(100, 10);
-    Q1->Position = glm::vec3{300, 300, 0};
+    Quad* Floor = new Quad(Camera->GetOrthoWidth(), 1);
+    Floor->Position = glm::vec3{0, -Camera->GetOrthoHeight() * 0.5f + Floor->Scale.y * 0.5f, 0};
 
-    Quad* Q2 = new Quad(100, 10);
-    Q2->Position = glm::vec3{500, 300, 0};
+    Quad* Player = new Quad(1, 1);
+    Player->Position = glm::vec3{0, 0, 0};
+    Player->Color = Color_Red;
 
-    Quads.push_back(Q1);    
-    Quads.push_back(Q2);    
+    Quads.push_back(Floor);    
+    Quads.push_back(Player);    
 }
 
 void PlatformScene::Update()