Writing a Picture Puzzle Game - Android NDK Game Development - page 285

Getting ready

Build and run the example 5_Puzzle from the supplementary materials. This example,
like others in this topic, runs on Android as well as on Windows.

How to do it…

1. We start by augmenting our 3_UIPrototype project with a new page, clPage_

Gallery . This page delegates rendering and updating to the global g_Flow object:
class clPage_Gallery: public clGUIPage
{
public:
…
virtual void Render()
{
RenderDirect( g_Flow );
}
virtual void Update(float DT)
{
g_Flow->FFlinger->Update(DT);
}
private:
void RenderDirect( clPtr<clFlowUI> Control );
};

2. The RenderDirect() method is essentially a slightly modiied version of

RenderDirect() from the Implementing the animated 3D image selector recipe
in this chapter. There are only two differences—we replace wireframe quad rendering
with the clCanvas::Rect3D() call (to render a textured 3D rectangle) and use
textures from the g_Gallery object, described recently in this chapter in the Image
gallery with Picasa downloader recipe:
void RenderDirect( clPtr<clFlowUI> Control );
{
…

3. The rendering order is left to right, to prevent incorrect overlapping of images:

int ImgOrder[] = { CurImg - 3, CurImg - 2, CurImg - 1,
CurImg + 3, CurImg + 2, CurImg + 1, CurImg };