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 CardboardDeviceParams()
{
mVendor = DEFAULT_VENDOR;
mModel = DEFAULT_MODEL;
mVersion = DEFAULT_VERSION;
mInterpupillaryDistance = DEFAULT_INTERPUPILLARY_DISTANCE;
mVerticalDistanceToLensCenter = DEFAULT_VERTICAL_DISTANCE_TO_LENS_CENTER;
mLensDiameter = DEFAULT_LENS_DIAMETER;
mScreenToLensDistance = DEFAULT_SCREEN_TO_LENS_DISTANCE;
mEyeToLensDistance = DEFAULT_EYE_TO_LENS_DISTANCE;
mVisibleViewportSize = DEFAULT_VISIBLE_VIEWPORT_MAX_SIZE;
mFovY = DEFAULT_FOV_Y;
mDistortion = new Distortion();
}
public CardboardDeviceParams(CardboardDeviceParams @params)
{
mNfcTagContents = @params.mNfcTagContents;
mVendor = @params.mVendor;
mModel = @params.mModel;
mVersion = @params.mVersion;
mInterpupillaryDistance = @params.mInterpupillaryDistance;
mVerticalDistanceToLensCenter = @params.mVerticalDistanceToLensCenter;
mLensDiameter = @params.mLensDiameter;
mScreenToLensDistance = @params.mScreenToLensDistance;
mEyeToLensDistance = @params.mEyeToLensDistance;
mVisibleViewportSize = @params.mVisibleViewportSize;
mFovY = @params.mFovY;
mDistortion = new Distortion(@params.mDistortion);
}
public bool equals(Object other)
{
if (other == null)
{
return(false);
}
if (other == this)
{
return(true);
}
if (!(other is Distortion))
{
return(false);
}
Distortion o = (Distortion)other;
return((mCoefficients[0] == o.mCoefficients[0]) && (mCoefficients[1] == o.mCoefficients[1]));
}
public Distortion(Distortion other)
{
mCoefficients = new float[2];
mCoefficients[0] = other.mCoefficients[0];
mCoefficients[1] = other.mCoefficients[1];
}
public DistortionMesh(EyeParams eye, Distortion distortion, float screenWidthM, float screenHeightM, float xEyeOffsetMScreen, float yEyeOffsetMScreen, float textureWidthM, float textureHeightM, float xEyeOffsetMTexture, float yEyeOffsetMTexture, float viewportXMTexture, float viewportYMTexture, float viewportWidthMTexture, float viewportHeightMTexture)
{
float mPerUScreen = screenWidthM;
float mPerVScreen = screenHeightM;
float mPerUTexture = textureWidthM;
float mPerVTexture = textureHeightM;
float[] vertexData = new float[8000];
int vertexOffset = 0;
for (int row = 0; row < 40; row++)
{
for (int col = 0; col < 40; col++)
{
float uTexture = col / 39.0F * (viewportWidthMTexture / textureWidthM) + viewportXMTexture / textureWidthM;
float vTexture = row / 39.0F * (viewportHeightMTexture / textureHeightM) + viewportYMTexture / textureHeightM;
float xTexture = uTexture * mPerUTexture;
float yTexture = vTexture * mPerVTexture;
float xTextureEye = xTexture - xEyeOffsetMTexture;
float yTextureEye = yTexture - yEyeOffsetMTexture;
float rTexture = (float)Math.Sqrt(xTextureEye * xTextureEye + yTextureEye * yTextureEye);
float textureToScreen = rTexture > 0.0F ? distortion.distortInverse(rTexture) / rTexture : 1.0F;
float xScreen = xTextureEye * textureToScreen + xEyeOffsetMScreen;
float yScreen = yTextureEye * textureToScreen + yEyeOffsetMScreen;
float uScreen = xScreen / mPerUScreen;
float vScreen = yScreen / mPerVScreen;
float vignetteSizeMTexture = 0.002F / textureToScreen;
float dxTexture = xTexture - DistortionRenderer.clamp(xTexture, viewportXMTexture + vignetteSizeMTexture, viewportXMTexture + viewportWidthMTexture - vignetteSizeMTexture);
float dyTexture = yTexture - DistortionRenderer.clamp(yTexture, viewportYMTexture + vignetteSizeMTexture, viewportYMTexture + viewportHeightMTexture - vignetteSizeMTexture);
float drTexture = (float)Math.Sqrt(dxTexture * dxTexture + dyTexture * dyTexture);
float vignette = 1.0F - DistortionRenderer.clamp(drTexture / vignetteSizeMTexture, 0.0F, 1.0F);
vertexData[(vertexOffset + 0)] = (2.0F * uScreen - 1.0F);
vertexData[(vertexOffset + 1)] = (2.0F * vScreen - 1.0F);
vertexData[(vertexOffset + 2)] = vignette;
vertexData[(vertexOffset + 3)] = uTexture;
vertexData[(vertexOffset + 4)] = vTexture;
vertexOffset += 5;
}
}
nIndices = 3158;
int[] indexData = new int[nIndices];
int indexOffset = 0;
vertexOffset = 0;
for (int row = 0; row < 39; row++)
{
if (row > 0)
{
indexData[indexOffset] = indexData[(indexOffset - 1)];
indexOffset++;
}
for (int col = 0; col < 40; col++)
{
if (col > 0)
{
if (row % 2 == 0)
{
vertexOffset++;
}
else
{
vertexOffset--;
}
}
indexData[(indexOffset++)] = vertexOffset;
indexData[(indexOffset++)] = (vertexOffset + 40);
}
vertexOffset += 40;
}
FloatBuffer vertexBuffer = ByteBuffer.AllocateDirect(vertexData.Length * 4).Order(ByteOrder.NativeOrder()).AsFloatBuffer();
vertexBuffer.Put(vertexData).Position(0);
IntBuffer indexBuffer = ByteBuffer.AllocateDirect(indexData.Length * 4).Order(ByteOrder.NativeOrder()).AsIntBuffer();
indexBuffer.Put(indexData).Position(0);
int[] bufferIds = new int[2];
GLES20.GlGenBuffers(2, bufferIds, 0);
mArrayBufferId = bufferIds[0];
mElementBufferId = bufferIds[1];
GLES20.GlBindBuffer(34962, mArrayBufferId);
GLES20.GlBufferData(34962, vertexData.Length * 4, vertexBuffer, 35044);
GLES20.GlBindBuffer(34963, mElementBufferId);
GLES20.GlBufferData(34963, indexData.Length * 4, indexBuffer, 35044);
GLES20.GlBindBuffer(34962, 0);
GLES20.GlBindBuffer(34963, 0);
}
private float computeDistortionScale(Distortion distortion, float screenWidthM, float interpupillaryDistanceM)
{
return(distortion.distortionFactor((screenWidthM / 2.0F - interpupillaryDistanceM / 2.0F) / (screenWidthM / 4.0F)));
}
