Opengl Libgdx中的帧缓冲区,使用glclearcolor()清除整个屏幕
我在Opengl Libgdx中的帧缓冲区,使用glclearcolor()清除整个屏幕,opengl,libgdx,framebuffer,Opengl,Libgdx,Framebuffer,我在framebuffer中使用glClearColor内部begin()和end(), 但它正在清除整个屏幕的颜色,我做错了什么吗 public class FrameBufferTest implements ApplicationListener{ OrthographicCamera camera; SpriteBatch batcher; FrameBuffer fbo; Texture tex; @Override public vo
framebuffer
中使用glClearColor
内部begin()
和end()
,
但它正在清除整个屏幕的颜色,我做错了什么吗
public class FrameBufferTest implements ApplicationListener{
OrthographicCamera camera;
SpriteBatch batcher;
FrameBuffer fbo;
Texture tex;
@Override
public void create() {
batcher = new SpriteBatch();
camera = new OrthographicCamera(800, 480);
camera.position.set(camera.viewportWidth/2f, camera.viewportHeight/2f, 0);
fbo = new FrameBuffer(Format.RGBA8888, 100, 100,false);
camera.position.set(camera.viewportWidth/2f, camera.viewportHeight/2f, 0);
tex = new Texture("data/bg.png");
}
@Override
public void render() {
GL20 gl = Gdx.graphics.getGL20();
gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
gl.glClearColor(0.5f,0.5f,0.5f,0.5f); // grey color
camera.update();
batcher.setProjectionMatrix(camera.combined);
batcher.enableBlending();
batcher.begin();
batcher.draw(tex, 0, 0, 256, 256);
batcher.end();
fbo.begin();
gl.glClearColor(1f,0,0,1f);
gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
fbo.end();
batcher.begin();
batcher.draw(fbo.getColorBufferTexture(), 512, 0, 100, 100);
batcher.end();
}
在渲染方法的开头交换这两行:
gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
gl.glClearColor(0.5f,0.5f,0.5f,0.5f); // grey color
按照您拥有它们的顺序,它将使用最近设置的“清除颜色”(clear color)清除颜色,这是您在渲染方法中较低位置设置的红色(因为这是一个循环)。有没有任何方法可以在不使用网格或形状渲染器的情况下使用帧缓冲区的颜色。这不是您已经做过的吗?您使帧缓冲区变为红色。