new example added: models_plane_rotations

examples/models/models_plane_rotations.c

@@ -0,0 +1,198 @@
+/*******************************************************************************************
+*
+*   raylib [models] example - Plane rotations (pitch, roll, yaw)
+*
+*   This example has been created using raylib 1.8 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Example based on Berni work on Raspberry Pi: 
+*   http://forum.raylib.com/index.php?p=/discussion/124/line-versus-triangle-drawing-order
+*
+*   Copyright (c) 2017 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+#include "raymath.h"
+
+// Draw angle gauge controls
+void DrawAngleGauge(Texture2D angleGauge, int x, int y, float angle, char title[], Color color);
+
+//----------------------------------------------------------------------------------
+// Main entry point
+//----------------------------------------------------------------------------------
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [models] example - plane rotations (pitch, roll, yaw)");
+
+    Texture2D texAngleGauge = LoadTexture("resources/angle_gauge.png"); 
+    Texture2D texBackground = LoadTexture("resources/background.png");
+    Texture2D texPitch = LoadTexture("resources/pitch.png");   
+    Texture2D texPlane = LoadTexture("resources/plane.png");
+
+    RenderTexture2D framebuffer = LoadRenderTexture(192, 192);
+    
+    // Model loading
+    Model model = LoadModel("resources/plane.obj");      // Load OBJ model
+    model.material.maps[MAP_DIFFUSE].texture = LoadTexture("resources/plane_diffuse.png"); // Set map diffuse texture
+    
+    GenTextureMipmaps(&model.material.maps[MAP_DIFFUSE].texture);
+    
+    Camera camera = { 0 };
+    camera.position = (Vector3){ 0.0f, 60.0f, -120.0f };// Camera position perspective
+    camera.target = (Vector3){ 0.0f, 12.0f, 0.0f };     // Camera looking at point
+    camera.up = (Vector3){ 0.0f, 1.0f, 0.0f };          // Camera up vector (rotation towards target)
+    camera.fovy = 30.0f;                                // Camera field-of-view Y
+    
+    float pitch = 0.0f;
+    float roll = 0.0f;
+    float yaw = 0.0f;
+
+    SetTargetFPS(60);
+    //--------------------------------------------------------------------------------------
+
+
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        
+        // Plane roll (x-axis) controls
+        if (IsKeyDown(KEY_LEFT)) roll += 1.0f;
+        else if (IsKeyDown(KEY_RIGHT)) roll -= 1.0f;
+        else
+        {
+            if (roll > 0.0f) roll -= 0.5f;
+            else if (roll < 0.0f) roll += 0.5f;
+        }
+        
+        // Plane pitch (z-axis) controls
+        if (IsKeyDown(KEY_DOWN)) pitch += 0.6f;
+        else if (IsKeyDown(KEY_UP)) pitch -= 0.6f;
+        else
+        {
+            if (pitch > 0.3f) pitch -= 0.3f;
+            else if (pitch < -0.3f) pitch += 0.3f;
+        }
+        
+        // Wraps the phase of an angle to fit between -180 and +180 degrees
+        int pitchOffset = pitch;
+        while (pitchOffset > 180) pitchOffset -= 360;
+        while (pitchOffset < -180) pitchOffset += 360;
+        pitchOffset *= 10;
+        
+        // Plane yaw (y-axis) controls
+        if (IsKeyDown(KEY_S)) yaw += 1.0f;
+        else if (IsKeyDown(KEY_A)) yaw -= 1.0f;
+        else
+        {
+            if (yaw > 0.0f) yaw -= 0.5f;
+            else if (yaw < 0.0f) yaw += 0.5f;
+        }
+
+        Matrix transform = MatrixIdentity();
+    
+        transform = MatrixMultiply(transform, MatrixRotateZ(DEG2RAD*roll));
+        transform = MatrixMultiply(transform, MatrixRotateX(DEG2RAD*pitch));
+        transform = MatrixMultiply(transform, MatrixRotateY(DEG2RAD*yaw));
+        
+        model.transform = transform;
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+        
+            ClearBackground(RAYWHITE);
+        
+            // Draw framebuffer texture (Ahrs Display)
+            int centerX = framebuffer.texture.width/2;
+            int centerY = framebuffer.texture.height/2;
+            float scaleFactor = 0.5f;
+
+            BeginTextureMode(framebuffer);
+
+                BeginBlendMode(BLEND_ALPHA);
+
+                DrawTexturePro(texBackground, (Rectangle){0,0,texBackground.width, texBackground.height},
+                               (Rectangle){ centerX, centerY, texBackground.width*scaleFactor, texBackground.height*scaleFactor},
+                               (Vector2){texBackground.width/2*scaleFactor, texBackground.height/2*scaleFactor + pitchOffset*scaleFactor}, roll, WHITE);
+
+                DrawTexturePro(texPitch, (Rectangle){ 0, 0, texPitch.width, texPitch.height },
+                               (Rectangle){ centerX, centerY, texPitch.width*scaleFactor, texPitch.height*scaleFactor },
+                               (Vector2){ texPitch.width/2*scaleFactor, texPitch.height/2*scaleFactor + pitchOffset*scaleFactor }, roll, WHITE);
+            
+                DrawTexturePro(texPlane, (Rectangle){0,0,texPlane.width, texPlane.height },
+                               (Rectangle){ centerX, centerY, texPlane.width*scaleFactor, texPlane.height*scaleFactor }, 
+                               (Vector2){texPlane.width/2*scaleFactor, texPlane.height/2*scaleFactor }, 0, WHITE);
+                                
+                EndBlendMode();
+
+            EndTextureMode();
+
+            // Draw 3D model (recomended to draw 3D always before 2D)
+            Begin3dMode(camera);
+
+                DrawModel(model, (Vector3){ 0, 6.0f, 0 }, 1.0f, WHITE);   // Draw 3d model with texture
+                DrawGrid(10, 10.0f);
+
+            End3dMode();
+
+            // Draw 2D GUI stuff
+            DrawAngleGauge(texAngleGauge, 80, 80, roll, "roll", RED);
+            DrawAngleGauge(texAngleGauge, 190, 80, pitch, "pitch", GREEN);
+            DrawAngleGauge(texAngleGauge, 300, 80, yaw, "yaw", SKYBLUE);
+            
+            DrawRectangle(30, 360, 260, 70, Fade(SKYBLUE, 0.5f));
+            DrawRectangleLines(30, 360, 260, 70, Fade(DARKBLUE, 0.5f));
+            DrawText("Pitch controlled with: KEY_UP / KEY_DOWN", 40, 370, 10, DARKGRAY);
+            DrawText("Roll controlled with: KEY_LEFT / KEY_RIGHT", 40, 390, 10, DARKGRAY);
+            DrawText("Yaw controlled with: KEY_A / KEY_S", 40, 410, 10, DARKGRAY);
+
+            // Draw framebuffer texture
+            DrawTextureRec(framebuffer.texture, (Rectangle){ 0, 0, framebuffer.texture.width, -framebuffer.texture.height }, 
+                           (Vector2){ screenWidth - framebuffer.texture.width - 20, 20 }, Fade(WHITE, 0.8f));
+            
+            DrawRectangleLines(screenWidth - framebuffer.texture.width - 20, 20, framebuffer.texture.width, framebuffer.texture.height, DARKGRAY);
+        
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    
+    // Unload all loaded data
+    UnloadModel(model);
+    
+    UnloadRenderTexture(framebuffer);
+    
+    UnloadTexture(texAngleGauge); 
+    UnloadTexture(texBackground);
+    UnloadTexture(texPitch);  
+    UnloadTexture(texPlane);
+    
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+    
+    return 0;
+}
+
+// Draw angle gauge controls
+void DrawAngleGauge(Texture2D angleGauge, int x, int y, float angle, char title[], Color color)
+{
+    Rectangle srcRec = { 0, 0, angleGauge.width, angleGauge.height };
+    Rectangle dstRec = { x, y, angleGauge.width, angleGauge.height };
+    Vector2 origin = { angleGauge.width/2, angleGauge.height/2};
+    int textSize = 20;
+
+    DrawTexturePro(angleGauge, srcRec, dstRec, origin, angle, color);
+  
+    DrawText(FormatText("%5.1f°", angle), x - MeasureText(FormatText("%5.1f°", angle), textSize) / 2, y + 10, textSize, DARKGRAY); 
+    DrawText(title, x - MeasureText(title, textSize) / 2, y + 60, textSize, DARKGRAY);  
+}