private void UpdateFieldOfView(FieldOfView leftEyeFov, FieldOfView rightEyeFov)
{
CardboardDeviceParams cdp = mHmd.getCardboard();
ScreenParams screen = mHmd.getScreen();
Distortion distortion = cdp.getDistortion();
float idealFovAngle = (float)Math.ToDegrees(Math.Atan2(cdp.getLensDiameter() / 2.0F, cdp.getEyeToLensDistance()));
float eyeToScreenDist = cdp.getEyeToLensDistance() + cdp.getScreenToLensDistance();
float outerDist = (screen.getWidthMeters() - cdp.getInterpupillaryDistance()) / 2.0F;
float innerDist = cdp.getInterpupillaryDistance() / 2.0F;
float bottomDist = cdp.getVerticalDistanceToLensCenter() - screen.getBorderSizeMeters();
float topDist = screen.getHeightMeters() + screen.getBorderSizeMeters() - cdp.getVerticalDistanceToLensCenter();
float outerAngle = (float)Math.ToDegrees(Math.Atan2(distortion.distort(outerDist), eyeToScreenDist));
float innerAngle = (float)Math.ToDegrees(Math.Atan2(distortion.distort(innerDist), eyeToScreenDist));
float bottomAngle = (float)Math.ToDegrees(Math.Atan2(distortion.distort(bottomDist), eyeToScreenDist));
float topAngle = (float)Math.ToDegrees(Math.Atan2(distortion.distort(topDist), eyeToScreenDist));
leftEyeFov.setLeft(Math.Min(outerAngle, idealFovAngle));
leftEyeFov.setRight(Math.Min(innerAngle, idealFovAngle));
leftEyeFov.setBottom(Math.Min(bottomAngle, idealFovAngle));
leftEyeFov.setTop(Math.Min(topAngle, idealFovAngle));
rightEyeFov.setLeft(Math.Min(innerAngle, idealFovAngle));
rightEyeFov.setRight(Math.Min(outerAngle, idealFovAngle));
rightEyeFov.setBottom(Math.Min(bottomAngle, idealFovAngle));
rightEyeFov.setTop(Math.Min(topAngle, idealFovAngle));
}
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);
}
public void OnDrawFrame(IGL10 gl)
{
if ((mShuttingDown) || (mInvalidSurfaceSize))
{
return;
}
ScreenParams screen = mHmd.getScreen();
CardboardDeviceParams cdp = mHmd.getCardboard();
mView.mHeadTracker.getLastHeadView(mHeadTransform.getHeadView(), 0);
float halfInterpupillaryDistance = cdp.getInterpupillaryDistance() * 0.5F;
if (mVRMode)
{
Android.Opengl.Matrix.SetIdentityM(mLeftEyeTranslate, 0);
Android.Opengl.Matrix.SetIdentityM(mRightEyeTranslate, 0);
Android.Opengl.Matrix.TranslateM(mLeftEyeTranslate, 0, halfInterpupillaryDistance, 0.0F, 0.0F);
Android.Opengl.Matrix.TranslateM(mRightEyeTranslate, 0, -halfInterpupillaryDistance, 0.0F, 0.0F);
Android.Opengl.Matrix.MultiplyMM(mLeftEye.getTransform().GetEyeView(), 0, mLeftEyeTranslate, 0, mHeadTransform.getHeadView(), 0);
Android.Opengl.Matrix.MultiplyMM(mRightEye.getTransform().GetEyeView(), 0, mRightEyeTranslate, 0, mHeadTransform.getHeadView(), 0);
}
else
{
//Java.Lang.JavaSystem.Arraycopy(mHeadTransform.getHeadView(), 0, mMonocular.getTransform().GetEyeView(), 0, mHeadTransform.getHeadView().Length);
Array.Copy(mHeadTransform.getHeadView(), 0, mMonocular.getTransform().GetEyeView(), 0, mHeadTransform.getHeadView().Length);
}
if (mProjectionChanged)
{
mMonocular.getViewport().setViewport(0, 0, screen.getWidth(), screen.getHeight());
if (!mVRMode)
{
float aspectRatio = screen.getWidth() / screen.getHeight();
Android.Opengl.Matrix.PerspectiveM(mMonocular.getTransform().GetPerspective(), 0, cdp.getFovY(), aspectRatio, mZNear, mZFar);
}
else if (mDistortionCorrectionEnabled)
{
UpdateFieldOfView(mLeftEye.getFov(), mRightEye.getFov());
mView.mDistortionRenderer.onProjectionChanged(mHmd, mLeftEye, mRightEye, mZNear, mZFar);
}
else
{
float distEyeToScreen = cdp.getVisibleViewportSize() / 2.0F / (float)Math.Tan(Math.ToRadians(cdp.getFovY()) / 2.0D);
float left = screen.getWidthMeters() / 2.0F - halfInterpupillaryDistance;
float right = halfInterpupillaryDistance;
float bottom = cdp.getVerticalDistanceToLensCenter() - screen.getBorderSizeMeters();
float top = screen.getBorderSizeMeters() + screen.getHeightMeters() - cdp.getVerticalDistanceToLensCenter();
FieldOfView leftEyeFov = mLeftEye.getFov();
leftEyeFov.setLeft((float)Math.ToDegrees(Math.Atan2(left, distEyeToScreen)));
leftEyeFov.setRight((float)Math.ToDegrees(Math.Atan2(right, distEyeToScreen)));
leftEyeFov.setBottom((float)Math.ToDegrees(Math.Atan2(bottom, distEyeToScreen)));
leftEyeFov.setTop((float)Math.ToDegrees(Math.Atan2(top, distEyeToScreen)));
FieldOfView rightEyeFov = mRightEye.getFov();
rightEyeFov.setLeft(leftEyeFov.getRight());
rightEyeFov.setRight(leftEyeFov.getLeft());
rightEyeFov.setBottom(leftEyeFov.getBottom());
rightEyeFov.setTop(leftEyeFov.getTop());
leftEyeFov.toPerspectiveMatrix(mZNear, mZFar, mLeftEye.getTransform().GetPerspective(), 0);
rightEyeFov.toPerspectiveMatrix(mZNear, mZFar, mRightEye.getTransform().GetPerspective(), 0);
mLeftEye.getViewport().setViewport(0, 0, screen.getWidth() / 2, screen.getHeight());
mRightEye.getViewport().setViewport(screen.getWidth() / 2, 0, screen.getWidth() / 2, screen.getHeight());
}
mProjectionChanged = false;
}
if (mVRMode)
{
if (mDistortionCorrectionEnabled)
{
mView.mDistortionRenderer.beforeDrawFrame();
if (mDistortionCorrectionScale == 1.0F)
{
mRenderer.OnDrawFrame(mHeadTransform, mLeftEye, mRightEye);
}
else
{
int leftX = mLeftEye.getViewport().x;
int leftY = mLeftEye.getViewport().y;
int leftWidth = mLeftEye.getViewport().width;
int leftHeight = mLeftEye.getViewport().height;
int rightX = mRightEye.getViewport().x;
int rightY = mRightEye.getViewport().y;
int rightWidth = mRightEye.getViewport().width;
int rightHeight = mRightEye.getViewport().height;
mLeftEye.getViewport().setViewport((int)(leftX * mDistortionCorrectionScale), (int)(leftY * mDistortionCorrectionScale), (int)(leftWidth * mDistortionCorrectionScale), (int)(leftHeight * mDistortionCorrectionScale));
mRightEye.getViewport().setViewport((int)(rightX * mDistortionCorrectionScale), (int)(rightY * mDistortionCorrectionScale), (int)(rightWidth * mDistortionCorrectionScale), (int)(rightHeight * mDistortionCorrectionScale));
mRenderer.OnDrawFrame(mHeadTransform, mLeftEye, mRightEye);
mLeftEye.getViewport().setViewport(leftX, leftY, leftWidth, leftHeight);
mRightEye.getViewport().setViewport(rightX, rightY, rightWidth, rightHeight);
}
mView.mDistortionRenderer.afterDrawFrame();
}
else
{
mRenderer.OnDrawFrame(mHeadTransform, mLeftEye, mRightEye);
}
}
else
{
mRenderer.OnDrawFrame(mHeadTransform, mMonocular, null);
}
mRenderer.OnFinishFrame(mMonocular.getViewport());
}