From c053de3c7def268a646ac8384cebc1c330b7ef8a Mon Sep 17 00:00:00 2001
From: Ray <raysan5@gmail.com>
Date: Thu, 20 Dec 2018 09:52:52 +0100
Subject: new example: models_obj_viewer

---
 examples/models/models_obj_viewer.c | 127 ++++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 examples/models/models_obj_viewer.c

(limited to 'examples/models/models_obj_viewer.c')

diff --git a/examples/models/models_obj_viewer.c b/examples/models/models_obj_viewer.c
new file mode 100644
index 00000000..55c583c2
--- /dev/null
+++ b/examples/models/models_obj_viewer.c
@@ -0,0 +1,127 @@
+/*******************************************************************************************
+*
+*   raylib [models] example - OBJ models viewer
+*
+*   This example has been created using raylib 2.0 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2014-2018 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#include <strings.h>        // Required for: strcpy()
+
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    int screenWidth = 800;
+    int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib example - obj viewer");
+
+    // Define the camera to look into our 3d world
+    Camera camera = {{ 30.0f, 30.0f, 30.0f }, { 0.0f, 10.0f, 0.0f }, { 0.0f, 1.0f, 0.0f }, 45.0f, 0 };
+
+    Model model = LoadModel("resources/models/turret.obj");                     // Load default model obj
+    Texture2D texture = LoadTexture("resources/models/turret_diffuse.png");     // Load default model texture
+    model.material.maps[MAP_DIFFUSE].texture = texture; // Bind texture to model
+    
+    Vector3 position = { 0.0, 0.0, 0.0 };               // Set model position
+    BoundingBox bounds = MeshBoundingBox(model.mesh);   // Set model bounds     
+    bool selected = false;                              // Selected object flag
+    
+    SetCameraMode(camera, CAMERA_FREE);                 // Set a free camera mode
+
+    char objFilename[64] = "turret.obj";
+
+    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 (IsFileDropped())
+        {
+            int count = 0;
+            char **droppedFiles = GetDroppedFiles(&count);
+            
+            if (count == 1)
+            {
+                if (IsFileExtension(droppedFiles[0], ".obj"))
+                {
+                    UnloadMesh(&model.mesh);
+                    model.mesh = LoadMesh(droppedFiles[0]);
+                    bounds = MeshBoundingBox(model.mesh);
+                }
+                else if (IsFileExtension(droppedFiles[0], ".png"))
+                {
+                    UnloadTexture(texture);
+                    texture = LoadTexture(droppedFiles[0]);
+                    model.material.maps[MAP_DIFFUSE].texture = texture;
+                }
+
+                strcpy(objFilename, GetFileName(droppedFiles[0]));
+            }
+            
+            ClearDroppedFiles();    // Clear internal buffers
+        }
+        
+        UpdateCamera(&camera);
+        
+        // Select model on mouse click
+        if (IsMouseButtonPressed(MOUSE_LEFT_BUTTON))
+        {
+            // Check collision between ray and box
+            if (CheckCollisionRayBox(GetMouseRay(GetMousePosition(), camera), bounds)) selected = !selected;
+            else selected = false;
+        }
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            BeginMode3D(camera);
+
+                DrawModel(model, position, 1.0f, WHITE);   // Draw 3d model with texture
+
+                DrawGrid(20.0, 10.0);        // Draw a grid
+                
+                if (selected) DrawBoundingBox(bounds, GREEN);
+                
+            EndMode3D();
+            
+            DrawText("Free camera default controls:", 10, 20, 10, DARKGRAY);
+            DrawText("- Mouse Wheel to Zoom in-out", 20, 40, 10, GRAY);
+            DrawText("- Mouse Wheel Pressed to Pan", 20, 60, 10, GRAY);
+            DrawText("- Alt + Mouse Wheel Pressed to Rotate", 20, 80, 10, GRAY);
+            DrawText("- Alt + Ctrl + Mouse Wheel Pressed for Smooth Zoom", 20, 100, 10, GRAY);
+            
+            DrawText("Drag & drop .obj/.png to load mesh/texture.", 10, GetScreenHeight() - 20, 10, DARKGRAY);
+            DrawText(FormatText("Current file: %s", objFilename), 250, GetScreenHeight() - 20, 10, GRAY);
+            if (selected) DrawText("MODEL SELECTED", GetScreenWidth() - 110, 10, 10, GREEN);
+            
+            DrawText("(c) Turret 3D model by Alberto Cano", screenWidth - 200, screenHeight - 20, 10, GRAY);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    UnloadModel(model);         // Unload model
+
+    ClearDroppedFiles();        // Clear internal buffers
+    
+    CloseWindow();              // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}
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