Sprites

The gplay::SpriteBatch class is used to draw 2D sprites for both 2D and 3D games.

Drawing Sprites

void MyGame::initialize()
{
    // Create your sprite batch from a PNG image
    _batch = SpriteBatch::create("res/image.png");
}

void MyGame::render(float elapsedTime)
{
    // Clear the frame buffer
    clear(CLEAR_COLOR_DEPTH, Vector4(0, 0, 0, 1), 1.0f, 0);
 
    // Draw your sprites
    _batch->start();
    _batch->draw(Rectangle(0, 0, WINDOW_WIDTH, WINDOW_HEIGHT), 
                 Rectangle(0, 0, WINDOW_WIDTH, WINDOW_HEIGHT), Vector4::one());
    // SpriteBatch::draw() can be called multiple times between start() and finish()
    _batch->finish();
}
 
void MyGame::finalize()
{
    // Use built-in macros to clean up our resources.
    SAFE_DELETE(_batch);
}

Batching

It is possible to use SpriteBatch with a Sprite Sheet or Texture Atlas and call SpriteBatch::draw() multiple times between SpriteBatch::start() and SpriteBatch::finish() with different source and destination regions.

Enabling depth testing

Some of the SpriteBatch::draw() methods take a Z coordinate. If you want SpriteBatch draw behind other objects then make sure depth test is enable.

spriteBatch->getStateBlock()->setDepthTest(true);

Custom Projection (Billboards)

SpriteBatch uses an orthographic projection by default but you can specify a different projection matrix using SpriteBatch::setProjectionMatrix(). This can be used to draw billboards.

Example

• samples/browser/src/SpriteBatchSample.cpp