From d91179f8ab50b608b2dfc04bccbddbd2cd9b68e5 Mon Sep 17 00:00:00 2001
From: Max Danielsson <max@autious.net>
Date: Sun, 25 Mar 2018 18:49:15 +0200
Subject: [PATCH] Add orthographic projection example

---
 .../models/models_orthographic_projection.c   | 109 ++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 examples/models/models_orthographic_projection.c

diff --git a/examples/models/models_orthographic_projection.c b/examples/models/models_orthographic_projection.c
new file mode 100644
index 000000000..214fc969f
--- /dev/null
+++ b/examples/models/models_orthographic_projection.c
@@ -0,0 +1,109 @@
+/*******************************************************************************************
+*
+*   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 1.0 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2014 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    int screenWidth = 800;
+    int screenHeight = 450;
+    bool view_ortho = true;
+
+    InitWindow(screenWidth, screenHeight, "raylib [models] example - geometric shapes");
+
+    // Define the camera to look into our 3d world
+    Camera camera; 
+
+    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
+        //----------------------------------------------------------------------------------
+        // TODO: Update your variables here
+        //----------------------------------------------------------------------------------
+        //
+
+        // Input
+        //----------------------------------------------------------------------------------
+        if(IsKeyPressed(KEY_SPACE)) 
+        {
+            view_ortho = !view_ortho;
+        }
+
+
+        // Draw
+        //----------------------------------------------------------------------------------
+
+        if(view_ortho) 
+        {
+            camera = (Camera){{ 0.0f, 10.0f, 10.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 1.0f, 0.0f }, 10.0f, CAMERA_ORTHOGRAPHIC };
+        } 
+        else 
+        {
+            camera = (Camera){{ 0.0f, 10.0f, 10.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 1.0f, 0.0f }, 45.0f, CAMERA_PERSPECTIVE };
+        }
+
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            Begin3dMode(camera);
+
+                DrawCube((Vector3){-4.0f, 0.0f, 2.0f}, 2.0f, 5.0f, 2.0f, RED);
+                DrawCubeWires((Vector3){-4.0f, 0.0f, 2.0f}, 2.0f, 5.0f, 2.0f, GOLD);
+                DrawCubeWires((Vector3){-4.0f, 0.0f, -2.0f}, 3.0f, 6.0f, 2.0f, MAROON);
+
+                DrawSphere((Vector3){-1.0f, 0.0f, -2.0f}, 1.0f, GREEN);
+                DrawSphereWires((Vector3){1.0f, 0.0f, 2.0f}, 2.0f, 16, 16, LIME);
+
+                DrawCylinder((Vector3){4.0f, 0.0f, -2.0f}, 1.0f, 2.0f, 3.0f, 4, SKYBLUE);
+                DrawCylinderWires((Vector3){4.0f, 0.0f, -2.0f}, 1.0f, 2.0f, 3.0f, 4, DARKBLUE);
+                DrawCylinderWires((Vector3){4.5f, -1.0f, 2.0f}, 1.0f, 1.0f, 2.0f, 6, BROWN);
+
+                DrawCylinder((Vector3){1.0f, 0.0f, -4.0f}, 0.0f, 1.5f, 3.0f, 8, GOLD);
+                DrawCylinderWires((Vector3){1.0f, 0.0f, -4.0f}, 0.0f, 1.5f, 3.0f, 8, PINK);
+
+                DrawGrid(10, 1.0f);        // Draw a grid
+
+            End3dMode();
+
+            DrawFPS(10, 10);
+
+            DrawText("Press Spacebar to switch camera type", 10, 40, 24, BLACK);
+
+            if(view_ortho)
+            {
+                DrawText("Orthographic", 10, 65, 24, BLACK);
+            }
+            else
+            {
+                DrawText("Perspective", 10, 65, 24, BLACK);
+            }
+
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}