int main()
{
// Initialization
//--------------------------------------------------------------------------------------
int screenWidth = 800;
int screenHeight = 450;
InitWindow(screenWidth, screenHeight, "raylib [core] example - mouse wheel");
int boxPositionY = screenHeight/2 - 40;
int scrollSpeed = 4; // Scrolling speed in pixels
SetTargetFPS(60);
//--------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
{
// Update
//----------------------------------------------------------------------------------
boxPositionY -= (GetMouseWheelMove()*scrollSpeed);
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(RAYWHITE);
DrawRectangle(screenWidth/2 - 40, boxPositionY, 80, 80, MAROON);
DrawText("Use mouse wheel to move the cube up and down!", 10, 10, 20, GRAY);
DrawText(FormatText("Box position Y: %03i", boxPositionY), 10, 40, 20, LIGHTGRAY);
EndDrawing();
//----------------------------------------------------------------------------------
}
// De-Initialization
//--------------------------------------------------------------------------------------
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}
int main(void)
{
// Initialization
//--------------------------------------------------------------------------------------
const int screenWidth = 800;
const int screenHeight = 450;
InitWindow(screenWidth, screenHeight, "raylib [core] example - 2d camera");
Rectangle player = { 400, 280, 40, 40 };
Rectangle buildings[MAX_BUILDINGS] = { 0 };
Color buildColors[MAX_BUILDINGS] = { 0 };
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 = { 0 };
camera.target = (Vector2){ player.x + 20, player.y + 20 };
camera.offset = (Vector2){ 0, 0 };
camera.rotation = 0.0f;
camera.zoom = 1.0f;
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
//----------------------------------------------------------------------------------
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);
BeginMode2D(camera);
DrawRectangle(-6000, 320, 13000, 8000, DARKGRAY);
for (int i = 0; i < MAX_BUILDINGS; i++) DrawRectangleRec(buildings[i], buildColors[i]);
DrawRectangleRec(player, RED);
DrawLine(camera.target.x, -screenHeight*10, camera.target.x, screenHeight*10, GREEN);
DrawLine(-screenWidth*10, camera.target.y, screenWidth*10, camera.target.y, GREEN);
EndMode2D();
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;
}
