Game Development Reference
In-Depth Information
gl.glEnable(GL10.
GL_TEXTURE_2D
);
batcher.beginBatch(Assets.
background
);
batcher.drawSprite(240, 160, 480, 320, Assets.
backgroundRegion
);
batcher.endBatch();
gl.glDisable(GL10.
GL_TEXTURE_2D
);
renderer.render(world, deltaTime);
switch
(state) {
case
GAME_RUNNING
:
presentRunning();
break
;
case
GAME_PAUSED
:
presentPaused();
break
;
case
GAME_OVER
:
presentGameOver();
}
fpsCounter.logFrame();
}
The
present()
method is actually pretty simple, as well. As always, we start off by clearing
the framebuffer. Also, we clear the z buffer, since we are going to render some 3D objects for
which we need z testing. Next, we set up the projection matrix so that we can render our 2D
background image, just as we did in the
MainMenuScreen
or
SettingsScreen
classes. Once
that is done, we tell the
WorldRenderer
member to render our game world. Finally, we
delegate the rendering of the UI elements depending on the current state. Note that the
WorldRenderer.render()
method is responsible for setting up all things needed to render
the 3D world!
private void
presentPaused() {
GL10 gl = glGraphics.getGL();
guiCam.setViewportAndMatrices();
gl.glEnable(GL10.
GL_BLEND
);
gl.glBlendFunc(GL10.
GL_SRC_ALPHA
, GL10.
GL_ONE_MINUS_SRC_ALPHA
);
gl.glEnable(GL10.
GL_TEXTURE_2D
);
batcher.beginBatch(Assets.
items
);
Assets.
font
.drawText(batcher, scoreString, 10, 320-20);
batcher.drawSprite(240, 160, 160, 64, Assets.
pauseRegion
);
batcher.endBatch();
gl.glDisable(GL10.
GL_TEXTURE_2D
);
gl.glDisable(GL10.
GL_BLEND
);
}
The
presentPaused()
method just renders the
scoreString
via the
Font
instance we stored in the
Assets
class, as well as the Pause menu. Note that, at this point, we have already rendered the
background image, as well as the 3D world. All the UI elements will thus overlay the 3D world.
