Changing examples to use makefile

- Testing a modified version of the makefile from raylib Instead of multiple project files for examples.
- Fixed readme example

Examples/models/models_orthographic_projection.cs

@@ -0,0 +1,7 @@
+using Raylib;
+using static Raylib.Raylib;
+
+public partial class Examples
+{
+    /*******************************************************************************************
    *
    *   raylib [models] example - Show the difference between perspective and orthographic projection 
    *
    *   This program is heavily based on the geometric objects example
    *
    *   This example has been created using raylib 1.9.7 (www.raylib.com)
    *   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
    *
    *   Copyright (c) 2018 Max Danielsson & Ramon Santamaria (@raysan5)
    *
    ********************************************************************************************/
    
    
    public const #define FOVY_PERSPECTIVE    45.0f
public const #define WIDTH_ORTHOGRAPHIC  10.0f

    public static void Main()
    {
        // Initialization
        //--------------------------------------------------------------------------------------
        int screenWidth = 800;
        int screenHeight = 450;
    
        InitWindow(screenWidth, screenHeight, "raylib [models] example - geometric shapes");
    
        // Define the camera to look into our 3d world
        Camera camera = {{ 0.0f, 10.0f, 10.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 1.0f, 0.0f }, FOVY_PERSPECTIVE, CAMERA_PERSPECTIVE };
    
        SetTargetFPS(60);   // Set our game to run at 60 frames-per-second
        //--------------------------------------------------------------------------------------
    
        // Main game loop
        while (!WindowShouldClose())    // Detect window close button or ESC key
        {
            // Update
            //----------------------------------------------------------------------------------
            if (IsKeyPressed((int)Key.SPACE)) 
            {
                if (camera.type == CAMERA_PERSPECTIVE) 
                {
                    camera.fovy = WIDTH_ORTHOGRAPHIC;
                    camera.type = CAMERA_ORTHOGRAPHIC;
                } 
                else 
                {
                    camera.fovy = FOVY_PERSPECTIVE;
                    camera.type = CAMERA_PERSPECTIVE;
                }
            }
            //----------------------------------------------------------------------------------
    
            // Draw
            //----------------------------------------------------------------------------------
            BeginDrawing();
    
                ClearBackground(RAYWHITE);
    
                BeginMode3D(camera);
    
                    DrawCube(new Vector3(-4.0f, 0.0f, 2.0f);, 2.0f, 5.0f, 2.0f, RED);
                    DrawCubeWires(new Vector3(-4.0f, 0.0f, 2.0f);, 2.0f, 5.0f, 2.0f, GOLD);
                    DrawCubeWires(new Vector3(-4.0f, 0.0f, -2.0f);, 3.0f, 6.0f, 2.0f, MAROON);
    
                    DrawSphere(new Vector3(-1.0f, 0.0f, -2.0f);, 1.0f, GREEN);
                    DrawSphereWires(new Vector3(1.0f, 0.0f, 2.0f);, 2.0f, 16, 16, LIME);
    
                    DrawCylinder(new Vector3(4.0f, 0.0f, -2.0f);, 1.0f, 2.0f, 3.0f, 4, SKYBLUE);
                    DrawCylinderWires(new Vector3(4.0f, 0.0f, -2.0f);, 1.0f, 2.0f, 3.0f, 4, DARKBLUE);
                    DrawCylinderWires(new Vector3(4.5f, -1.0f, 2.0f);, 1.0f, 1.0f, 2.0f, 6, BROWN);
    
                    DrawCylinder(new Vector3(1.0f, 0.0f, -4.0f);, 0.0f, 1.5f, 3.0f, 8, GOLD);
                    DrawCylinderWires(new Vector3(1.0f, 0.0f, -4.0f);, 0.0f, 1.5f, 3.0f, 8, PINK);
    
                    DrawGrid(10, 1.0f);        // Draw a grid
    
                EndMode3D();
    
                DrawText("Press Spacebar to switch camera type", 10, GetScreenHeight() - 30, 20, DARKGRAY);
    
                if (camera.type == CAMERA_ORTHOGRAPHIC) DrawText("ORTHOGRAPHIC", 10, 40, 20, BLACK);
                else if (camera.type == CAMERA_PERSPECTIVE) DrawText("PERSPECTIVE", 10, 40, 20, BLACK);
    
                DrawFPS(10, 10);
    
            EndDrawing();
            //----------------------------------------------------------------------------------
        }
    
        // De-Initialization
        //--------------------------------------------------------------------------------------
        CloseWindow();        // Close window and OpenGL context
        //--------------------------------------------------------------------------------------
    
        return 0;
    }
        
+}