private EyeViewport initViewportForEye(EyeParams eye, float xOffsetM)
{
ScreenParams screen = mHmd.getScreen();
CardboardDeviceParams cdp = mHmd.getCardboard();
float eyeToScreenDistanceM = cdp.getEyeToLensDistance() + cdp.getScreenToLensDistance();
float leftM = (float)Math.Tan(Math.ToRadians(eye.getFov().getLeft())) * eyeToScreenDistanceM;
float rightM = (float)Math.Tan(Math.ToRadians(eye.getFov().getRight())) * eyeToScreenDistanceM;
float bottomM = (float)Math.Tan(Math.ToRadians(eye.getFov().getBottom())) * eyeToScreenDistanceM;
float topM = (float)Math.Tan(Math.ToRadians(eye.getFov().getTop())) * eyeToScreenDistanceM;
EyeViewport vp = new EyeViewport();
vp.x = xOffsetM;
vp.y = 0.0F;
vp.width = (leftM + rightM);
vp.height = (bottomM + topM);
vp.eyeX = (leftM + xOffsetM);
vp.eyeY = bottomM;
float xPxPerM = screen.getWidth() / screen.getWidthMeters();
float yPxPerM = screen.getHeight() / screen.getHeightMeters();
eye.getViewport().x = Math.Round(vp.x * xPxPerM);
eye.getViewport().y = Math.Round(vp.y * xPxPerM);
eye.getViewport().width = Math.Round(vp.width * xPxPerM);
eye.getViewport().height = Math.Round(vp.height * xPxPerM);
return(vp);
}
public void onProjectionChanged(HeadMountedDisplay hmd, EyeParams leftEye, EyeParams rightEye, float zNear, float zFar)
{
mHmd = new HeadMountedDisplay(hmd);
mLeftEyeFov = new FieldOfView(leftEye.getFov());
mRightEyeFov = new FieldOfView(rightEye.getFov());
ScreenParams screen = mHmd.getScreen();
CardboardDeviceParams cdp = mHmd.getCardboard();
if (mProgramHolder == null)
{
mProgramHolder = createProgramHolder();
}
EyeViewport leftEyeViewport = initViewportForEye(leftEye, 0.0F);
EyeViewport rightEyeViewport = initViewportForEye(rightEye, leftEyeViewport.width);
leftEye.getFov().toPerspectiveMatrix(zNear, zFar, leftEye.getTransform().GetPerspective(), 0);
rightEye.getFov().toPerspectiveMatrix(zNear, zFar, rightEye.getTransform().GetPerspective(), 0);
float textureWidthM = leftEyeViewport.width + rightEyeViewport.width;
float textureHeightM = Math.Max(leftEyeViewport.height, rightEyeViewport.height);
float xPxPerM = screen.getWidth() / screen.getWidthMeters();
float yPxPerM = screen.getHeight() / screen.getHeightMeters();
int textureWidthPx = Math.Round(textureWidthM * xPxPerM);
int textureHeightPx = Math.Round(textureHeightM * yPxPerM);
float xEyeOffsetMScreen = screen.getWidthMeters() / 2.0F - cdp.getInterpupillaryDistance() / 2.0F;
float yEyeOffsetMScreen = cdp.getVerticalDistanceToLensCenter() - screen.getBorderSizeMeters();
mLeftEyeDistortionMesh = createDistortionMesh(leftEye, leftEyeViewport, textureWidthM, textureHeightM, xEyeOffsetMScreen, yEyeOffsetMScreen);
xEyeOffsetMScreen = screen.getWidthMeters() - xEyeOffsetMScreen;
mRightEyeDistortionMesh = createDistortionMesh(rightEye, rightEyeViewport, textureWidthM, textureHeightM, xEyeOffsetMScreen, yEyeOffsetMScreen);
setupRenderTextureAndRenderbuffer(textureWidthPx, textureHeightPx);
}
private DistortionMesh createDistortionMesh(EyeParams eye, EyeViewport eyeViewport, float textureWidthM, float textureHeightM, float xEyeOffsetMScreen, float yEyeOffsetMScreen)
{
return(new DistortionMesh(eye, mHmd.getCardboard().getDistortion(), mHmd.getScreen().getWidthMeters(), mHmd.getScreen().getHeightMeters(), xEyeOffsetMScreen, yEyeOffsetMScreen, textureWidthM, textureHeightM, eyeViewport.eyeX, eyeViewport.eyeY, eyeViewport.x, eyeViewport.y, eyeViewport.width, eyeViewport.height));
}