Create models_third_person

examples/models/models_third_person.c

@@ -0,0 +1,144 @@
+/*******************************************************************************************
+*
+*   raylib [models] example - Third Person Camera
+*
+*   This example has been created using raylib 2.5 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2019 Ramon Santamaria (@raysan5) and @PompPenguin
+*
+*
+* 
+********************************************************************************************/
+
+#include "raylib.h"
+#include "raymath.h"
+
+
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    int screenWidth = 800;
+    int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib example - models_third_person");
+
+    // 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.materials[0].maps[MAP_DIFFUSE].texture = texture; // Bind texture to model
+    
+    Vector3 position = { 0.0f, 0.0f, 0.0f };                   // Set model position
+
+    SetCameraMode(camera, CAMERA_THIRD_PERSON);     // Set a third person camera mode
+
+    //Used for camera forward
+    Vector3 CameraPerspective = { 0.0f, 0.0f, 0.0f };
+    //Used for Vector3 calculations
+    Vector3 tempVec3 = { 0.0f, 0.0f, 0.0f };
+    //Used for camera right
+    Vector3 v3Right ={ 0.0f, 0.0f, 0.0f };
+    //Rotation    
+    float angle = 0.0f;
+
+    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
+        //----------------------------------------------------------------------------------
+        camera.target = (Vector3){ position.x, position.y, position.z };
+        camera.position = (Vector3){ position.x, position.y, position.z };
+
+        UpdateCamera(&camera);
+
+
+        //Get the camera foward
+        CameraPerspective = Vector3Subtract(camera.position,camera.target);
+        
+        //Move model and rotate Y axis in Cardinal Directions
+        if (IsKeyDown(KEY_W)){
+            //Move based on camera forward
+            tempVec3 = Vector3Multiply(Vector3Negate(CameraPerspective),1.0f);
+            tempVec3 = Vector3Multiply(tempVec3,GetFrameTime());
+            position = Vector3Add(position, (Vector3){tempVec3.x,0.0f,tempVec3.z});
+            
+            //rotate the model
+            angle = atan2 (CameraPerspective.z, CameraPerspective.x);
+            model.transform =  MatrixRotateY(angle);
+        }
+        if (IsKeyDown(KEY_A)){
+            //Get right of camera forward
+            v3Right = Vector3CrossProduct(camera.up,CameraPerspective);
+            
+            //Move based on camera forward
+            tempVec3 = Vector3Multiply(Vector3Negate(v3Right),1.0f);
+            tempVec3 = Vector3Multiply(tempVec3,GetFrameTime());
+            position = Vector3Add(position, (Vector3){tempVec3.x,0.0f,tempVec3.z});
+            
+            //rotate the model
+            angle = atan2 (-(v3Right.z), -(v3Right.x));
+            model.transform =  MatrixRotateY(angle);
+        }
+        if (IsKeyDown(KEY_D)){
+            //Get right of camera forward
+            v3Right = Vector3CrossProduct(camera.up,CameraPerspective);
+            //Move based on camera forward
+            tempVec3 = Vector3Multiply(v3Right,1.0f);
+            tempVec3 = Vector3Multiply(tempVec3,GetFrameTime());
+            position = Vector3Add(position, (Vector3){tempVec3.x,0.0f,tempVec3.z});
+            
+            //rotate the model
+            angle = atan2 (v3Right.z, v3Right.x);
+            model.transform =  MatrixRotateY(angle);
+        }
+        if (IsKeyDown(KEY_S)){
+            //Move based on camera forward
+            tempVec3 = Vector3Multiply(CameraPerspective,1.0f);
+            tempVec3 = Vector3Multiply(tempVec3,GetFrameTime());
+            position = Vector3Add(position, (Vector3){tempVec3.x,0.0f,tempVec3.z});
+        
+            //rotate the model
+            CameraPerspective = Vector3Negate(CameraPerspective);
+            angle = atan2 (CameraPerspective.z, CameraPerspective.x);
+            model.transform =  MatrixRotateY(angle);
+        }
+
+     
+        //----------------------------------------------------------------------------------
+
+        // 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
+
+            EndMode3D();
+            
+            DrawText("(c) Turret 3D model by Alberto Cano", screenWidth - 200, screenHeight - 20, 10, GRAY);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    UnloadModel(model);         // Unload model
+    UnloadTexture(texture);     // Unload model
+
+    CloseWindow();              // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}