/**
* Part of the deferred lighting technique, this method applies lighting through screen-space
* calculations to the previously flat-lit world rendering stored in the primary FBO. // TODO:
* rename sceneOpaque* FBOs to primaryA/B
*
* <p>See http://en.wikipedia.org/wiki/Deferred_shading as a starting point.
*/
public void applyLightBufferPass() {
int texId = 0;
GL13.glActiveTexture(GL13.GL_TEXTURE0 + texId);
buffers.sceneOpaque.bindTexture();
materials.lightBufferPass.setInt("texSceneOpaque", texId++);
GL13.glActiveTexture(GL13.GL_TEXTURE0 + texId);
buffers.sceneOpaque.bindDepthTexture();
materials.lightBufferPass.setInt("texSceneOpaqueDepth", texId++);
GL13.glActiveTexture(GL13.GL_TEXTURE0 + texId);
buffers.sceneOpaque.bindNormalsTexture();
materials.lightBufferPass.setInt("texSceneOpaqueNormals", texId++);
GL13.glActiveTexture(GL13.GL_TEXTURE0 + texId);
buffers.sceneOpaque.bindLightBufferTexture();
materials.lightBufferPass.setInt("texSceneOpaqueLightBuffer", texId, true);
buffers.sceneOpaquePingPong.bind();
graphicState.setRenderBufferMask(buffers.sceneOpaquePingPong, true, true, true);
setViewportTo(buffers.sceneOpaquePingPong.dimensions());
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // TODO: verify this is necessary
renderFullscreenQuad();
graphicState.bindDisplay(); // TODO: verify this is necessary
setViewportToWholeDisplay(); // TODO: verify this is necessary
renderingProcess.swapSceneOpaqueFBOs();
buffers.sceneOpaque.attachDepthBufferTo(buffers.sceneReflectiveRefractive);
}
private void generateSkyBand(FBO skyBand) {
materials.blur.enable();
materials.blur.setFloat("radius", 8.0f, true);
materials.blur.setFloat2("texelSize", 1.0f / skyBand.width(), 1.0f / skyBand.height(), true);
if (skyBand == buffers.sceneSkyBand0) {
buffers.sceneOpaque.bindTexture();
} else {
buffers.sceneSkyBand0.bindTexture();
}
skyBand.bind();
graphicState.setRenderBufferMask(skyBand, true, false, false);
setViewportTo(skyBand.dimensions());
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // TODO: verify this is necessary
renderFullscreenQuad();
graphicState.bindDisplay(); // TODO: verify this is necessary
setViewportToWholeDisplay(); // TODO: verify this is necessary
}