Scene Interface

Only sceneRender(PGraphicsOpenGL) is abstract. Every lifecycle and event method has a default implementation, preserving source compatibility for minimal scenes.

class ExampleScene implements Scene {
  public void setupScene() {
    // Allocate or reset scene-owned state.
  }

  public void update() {
    // Advance state once per Processing frame.
  }

  public void sceneRender(PGraphicsOpenGL pg) {
    // Draw only. Do not call beginDraw() or endDraw().
  }

  public void keyEvent(processing.event.KeyEvent event) {}
  public void mouseEvent(processing.event.MouseEvent event) {}
  public void controlEvent(controlP5.ControlEvent event) {}

  public void dispose() {
    // Release resources created by setupScene().
  }

  public String getName() {
    return "Example";
  }
}

Ownership Rules

• The library owns every render target draw lifecycle.
• update() is the place for once-per-frame mutation.
• sceneRender() may run against Standard and multiple cubemap faces in one frame.
• setupScene() may run again after a scene is deactivated and later reactivated.
• dispose() must release resources that setupScene() will recreate.
• Input callbacks are forwarded automatically; the main sketch must not forward them again.