Method Draw

src/RenderEngine.cpp:78–125

Render one frame using the current state of every object in the world */

 Render one frame using the current state of every object in the world
 */
void RenderEngine::Draw(){
	//get the active camera
    auto worldOwning = Ref<World>(world);
	auto components = worldOwning->Components();
	auto allcams = components.GetAllComponentsOfType<CameraComponent>();

	//set the view transform - all entities drawn will use this matrix
	for (auto& cam : allcams) {
		auto owning = Ref<CameraComponent>(cam);
		if (owning->isActive()) {
			//TODO: set projection
			auto size = surface->GetDrawableArea();
			owning->SetTargetSize(size.width, size.height);
            MaterialManager::SetProjectionMatrix(cam->GenerateProjectionMatrix());
            MaterialManager::SetViewMatrix(cam->GenerateViewMatrix());
			break;
		}
	}

    //apply transforms for only entities that need to be rendered
    auto toDraw = components.GetAllComponentsOfSubclass<RenderableComponent>();

    // Begin recording commands
    commands->Begin();

    // Clear buffers
    commands->Clear(LLGL::ClearFlags::Color | LLGL::ClearFlags::Depth);

    // Set the render context as the initial render target
    commands->BeginRenderPass(*surface->GetContext());

    // Set viewport and scissor rectangle
    commands->SetViewport(surface->GetContext()->GetResolution());

    //iterate through renderables and call Draw
    for (auto& e : toDraw) {
        e->Draw(commands);
    }

    commands->EndRenderPass();

    commands->End();
    queue->Submit(*commands);
    // Present the result on the screen
    surface->GetContext()->Present();

	//iterate through materials to draw each one
}

/**
@return the name of the current rendering API