// TODO: have a flag to invert the eyes (Cross Eye 3D), as mentioned in
// TODO: http://forum.terasology.org/threads/happy-coding.1018/#post-11264
private void renderFinalStereoImage(WorldRenderer.WorldRenderingStage renderingStage) {
if (renderingProcess.isNotTakingScreenshot()) {
buffers.sceneFinal.bind();
} else {
buffers.ocUndistorted.bind();
}
switch (renderingStage) {
case LEFT_EYE:
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
renderFullscreenQuad(0, 0, fullScale.width() / 2, fullScale.height());
break;
case RIGHT_EYE:
// no glClear() here: the rendering for the second eye is being added besides the first
// eye's rendering
renderFullscreenQuad(
fullScale.width() / 2 + 1, 0, fullScale.width() / 2, fullScale.height());
if (renderingProcess.isNotTakingScreenshot()) {
graphicState.bindDisplay();
applyOculusDistortion(buffers.sceneFinal);
} else {
buffers.sceneFinal.bind();
applyOculusDistortion(buffers.ocUndistorted);
renderingProcess.saveScreenshot();
// when saving a screenshot we do NOT send the image to screen,
// to avoid the brief flicker of the screenshot for one frame
}
break;
}
}
private void renderFinalMonoImage() {
if (renderingProcess.isNotTakingScreenshot()) {
graphicState.bindDisplay();
renderFullscreenQuad(0, 0, Display.getWidth(), Display.getHeight());
} else {
buffers.sceneFinal.bind();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
renderFullscreenQuad(0, 0, fullScale.width(), fullScale.height());
renderingProcess.saveScreenshot();
// when saving a screenshot we do not send the image to screen,
// to avoid the brief one-frame flicker of the screenshot
// This is needed to avoid the UI (which is not currently saved within the
// screenshot) being rendered for one frame with buffers.sceneFinal size.
setViewportToWholeDisplay();
}
}
private void updateOcShaderParametersForVP(
int vpX,
int vpY,
int vpWidth,
int vpHeight,
WorldRenderer.WorldRenderingStage renderingStage) {
float w = (float) vpWidth / fullScale.width();
float h = (float) vpHeight / fullScale.height();
float x = (float) vpX / fullScale.width();
float y = (float) vpY / fullScale.height();
float as = (float) vpWidth / vpHeight;
materials.ocDistortion.setFloat4(
"ocHmdWarpParam",
OculusVrHelper.getDistortionParams()[0],
OculusVrHelper.getDistortionParams()[1],
OculusVrHelper.getDistortionParams()[2],
OculusVrHelper.getDistortionParams()[3],
true);
float ocLensCenter =
(renderingStage == WorldRenderer.WorldRenderingStage.RIGHT_EYE)
? -1.0f * OculusVrHelper.getLensViewportShift()
: OculusVrHelper.getLensViewportShift();
materials.ocDistortion.setFloat2(
"ocLensCenter", x + (w + ocLensCenter * 0.5f) * 0.5f, y + h * 0.5f, true);
materials.ocDistortion.setFloat2("ocScreenCenter", x + w * 0.5f, y + h * 0.5f, true);
float scaleFactor = 1.0f / OculusVrHelper.getScaleFactor();
materials.ocDistortion.setFloat2(
"ocScale", (w / 2) * scaleFactor, (h / 2) * scaleFactor * as, true);
materials.ocDistortion.setFloat2("ocScaleIn", (2 / w), (2 / h) / as, true);
}
private void setViewportTo(FBO.Dimensions dimensions) {
glViewport(0, 0, dimensions.width(), dimensions.height());
}
private void setViewportToWholeDisplay() {
glViewport(0, 0, fullScale.width(), fullScale.height());
}
private void applyOculusDistortion(FBO inputBuffer) {
materials.ocDistortion.enable();
int texId = 0;
GL13.glActiveTexture(GL13.GL_TEXTURE0 + texId);
inputBuffer.bindTexture();
materials.ocDistortion.setInt("texInputBuffer", texId, true);
if (renderingProcess.isNotTakingScreenshot()) {
updateOcShaderParametersForVP(
0,
0,
fullScale.width() / 2,
fullScale.height(),
WorldRenderer.WorldRenderingStage.LEFT_EYE);
renderFullscreenQuad(0, 0, Display.getWidth(), Display.getHeight());
updateOcShaderParametersForVP(
fullScale.width() / 2 + 1,
0,
fullScale.width() / 2,
fullScale.height(),
WorldRenderer.WorldRenderingStage.RIGHT_EYE);
renderFullscreenQuad(0, 0, Display.getWidth(), Display.getHeight());
} else {
// what follows -should- work also when there is no screenshot being taken, but somehow it
// doesn't, hence the block above
updateOcShaderParametersForVP(
0,
0,
fullScale.width() / 2,
fullScale.height(),
WorldRenderer.WorldRenderingStage.LEFT_EYE);
renderFullscreenQuad(0, 0, fullScale.width(), fullScale.height());
updateOcShaderParametersForVP(
fullScale.width() / 2 + 1,
0,
fullScale.width() / 2,
fullScale.height(),
WorldRenderer.WorldRenderingStage.RIGHT_EYE);
renderFullscreenQuad(0, 0, fullScale.width(), fullScale.height());
}
}