Merge pull request #125 from raysan5/develop

Develop branch integration

1 files changed, 139 insertions, 0 deletions

diff --git a/examples/core_2d_camera.c b/examples/core_2d_camera.c
new file mode 100644
index 00000000..73e1d65f
--- /dev/null
+++ b/examples/core_2d_camera.c
@@ -0,0 +1,139 @@
+/*******************************************************************************************
+*
+*   raylib [core] example - 2d camera
+*
+*   This example has been created using raylib 1.5 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2016 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#define MAX_BUILDINGS   100
+
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    int screenWidth = 800;
+    int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [core] example - 2d camera");
+    
+    Rectangle player = { 400, 280, 40, 40 };
+    Rectangle buildings[MAX_BUILDINGS] = { 0, 0, 0, 0 };
+    Color buildColors[MAX_BUILDINGS] = { 80, 80, 80, 255 };
+    
+    int spacing = 0;
+    
+    for (int i = 0; i < MAX_BUILDINGS; i++)
+    {
+        buildings[i].width = GetRandomValue(50, 200);
+        buildings[i].height = GetRandomValue(100, 800);
+        buildings[i].y = screenHeight - 130 - buildings[i].height;
+        buildings[i].x = -6000 + spacing;
+
+        spacing += buildings[i].width;
+        
+        buildColors[i] = (Color){ GetRandomValue(200, 240), GetRandomValue(200, 240), GetRandomValue(200, 250), 255 };
+    }
+    
+    Camera2D camera;
+    
+    camera.target = (Vector2){ player.x + 20, player.y + 20 };
+    camera.offset = (Vector2){ 0, 0 };
+    camera.rotation = 0.0f;
+    camera.zoom = 1.0f;
+    
+    SetTargetFPS(60);
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        if (IsKeyDown(KEY_RIGHT))
+        {
+            player.x += 2;              // Player movement
+            camera.offset.x -= 2;       // Camera displacement with player movement
+        }
+        else if (IsKeyDown(KEY_LEFT))
+        {
+            player.x -= 2;              // Player movement
+            camera.offset.x += 2;       // Camera displacement with player movement
+        }
+        
+        // Camera target follows player
+        camera.target = (Vector2){ player.x + 20, player.y + 20 };
+        
+        // Camera rotation controls
+        if (IsKeyDown(KEY_A)) camera.rotation--;
+        else if (IsKeyDown(KEY_S)) camera.rotation++;
+        
+        // Limit camera rotation to 80 degrees (-40 to 40)
+        if (camera.rotation > 40) camera.rotation = 40;         
+        else if (camera.rotation < -40) camera.rotation = -40;
+        
+        // Camera zoom controls
+        camera.zoom += ((float)GetMouseWheelMove()*0.05f);
+        
+        if (camera.zoom > 3.0f) camera.zoom = 3.0f;
+        else if (camera.zoom < 0.1f) camera.zoom = 0.1f;
+        
+        // Camera reset (zoom and rotation)
+        if (IsKeyPressed(KEY_R)) 
+        {
+            camera.zoom = 1.0f;
+            camera.rotation = 0.0f;
+        }
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+        
+            ClearBackground(RAYWHITE);
+        
+            Begin2dMode(camera);
+
+                DrawRectangle(-6000, 320, 13000, 8000, DARKGRAY);
+                
+                for (int i = 0; i < MAX_BUILDINGS; i++) DrawRectangleRec(buildings[i], buildColors[i]);
+                
+                DrawRectangleRec(player, RED);
+                
+                DrawRectangle(camera.target.x, -500, 1, screenHeight*4, GREEN);
+                DrawRectangle(-500, camera.target.y, screenWidth*4, 1, GREEN);
+                
+            End2dMode();
+            
+            DrawText("SCREEN AREA", 640, 10, 20, RED);
+            
+            DrawRectangle(0, 0, screenWidth, 5, RED);
+            DrawRectangle(0, 5, 5, screenHeight - 10, RED);
+            DrawRectangle(screenWidth - 5, 5, 5, screenHeight - 10, RED);
+            DrawRectangle(0, screenHeight - 5, screenWidth, 5, RED);
+            
+            DrawRectangle( 10, 10, 250, 113, Fade(SKYBLUE, 0.5f));
+            DrawRectangleLines( 10, 10, 250, 113, BLUE);
+            
+            DrawText("Free 2d camera controls:", 20, 20, 10, BLACK);
+            DrawText("- Right/Left to move Offset", 40, 40, 10, DARKGRAY);
+            DrawText("- Mouse Wheel to Zoom in-out", 40, 60, 10, DARKGRAY);
+            DrawText("- A / S to Rotate", 40, 80, 10, DARKGRAY);
+            DrawText("- R to reset Zoom and Rotation", 40, 100, 10, DARKGRAY);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------   
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}
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