// Used to generate projection from ovrEyeDesc::Fov.
public static ovrMatrix4f GetProjection(ovrFovPort fov, float znear, float zfar, bool rightHanded)
{
return new ovrMatrix4f(ovrMatrix4f_Projection(fov, znear, zfar, rightHanded));
}
// Generate distortion mesh per eye.
// Distortion capabilities will depend on 'distortionCaps' flags; user should rely on
// appropriate shaders based on their settings.
// Distortion mesh data will be allocated and stored into the ovrDistortionMesh data structure,
// which should be explicitly freed with ovrHmd_DestroyDistortionMesh.
// Users should call ovrHmd_GetRenderScaleAndOffset to get uvScale and Offset values for rendering.
// The function shouldn't fail unless theres is a configuration or memory error, in which case
// ovrDistortionMesh values will be set to null.
// This is the only function in the SDK reliant on eye relief, currently imported from profiles,
// or overriden here.
public ovrDistortionMesh? CreateDistortionMesh(ovrEyeType eye,
ovrFovPort fov,
uint distortionCaps)
{
ovrDistortionMesh_Raw rawMesh = new ovrDistortionMesh_Raw();
if (!ovrHmd_CreateDistortionMesh(HmdPtr, eye, fov, distortionCaps, out rawMesh))
{
return null;
}
ovrDistortionMesh mesh = new ovrDistortionMesh(rawMesh);
ovrHmd_DestroyDistortionMesh(ref rawMesh);
return mesh;
}
private static extern void ovrHmd_GetRenderScaleAndOffset(ovrFovPort fov,
ovrSizei textureSize,
ovrRecti renderViewport,
[MarshalAs(UnmanagedType.LPArray, SizeConst = 2)]
[Out] out ovrVector2f[] uvScaleOffsetOut);
private static extern ovrMatrix4f_Raw ovrMatrix4f_Projection(ovrFovPort fov, float znear, float zfar, bool rightHanded);
private static extern ovrSizei ovrHmd_GetFovTextureSize(IntPtr hmd, ovrEyeType eye, ovrFovPort fov, float pixelsPerDisplayPixel);
private static extern ovrEyeRenderDesc ovrHmd_GetRenderDesc(IntPtr hmd, ovrEyeType eye, ovrFovPort fov);
// Computes updated 'uvScaleOffsetOut' to be used with a distortion if render target size or
// viewport changes after the fact. This can be used to adjust render size every frame, if desired.
public ovrVector2f[] GetRenderScaleAndOffset(ovrFovPort fov,
ovrSizei textureSize,
ovrRecti renderViewport)
{
ovrVector2f[] uvScaleOffsetOut;
ovrHmd_GetRenderScaleAndOffset(fov, textureSize, renderViewport, out uvScaleOffsetOut);
return uvScaleOffsetOut;
}
private static extern bool ovrHmd_CreateDistortionMesh(IntPtr hmd,
ovrEyeType eye,
ovrFovPort fov,
uint distortionCaps,
[Out] out ovrDistortionMesh_Raw meshData);
public ovrEyeRenderDesc GetRenderDesc(ovrEyeType eyeType, ovrFovPort fov)
{
return ovrHmd_GetRenderDesc(HmdPtr, eyeType, fov);
}
//-------------------------------------------------------------------------------------
// ***** Graphics Setup
// Calculates texture size recommended for rendering one eye within HMD, given FOV cone.
// Higher FOV will generally require larger textures to maintain quality.
// - pixelsPerDisplayPixel specifies that number of render target pixels per display
// pixel at center of distortion; 1.0 is the default value. Lower values
// can improve performance.
public ovrSizei GetFovTextureSize(ovrEyeType eye, ovrFovPort fov, float pixelsPerDisplayPixel = 1.0f)
{
return ovrHmd_GetFovTextureSize(HmdPtr, eye, fov, pixelsPerDisplayPixel);
}
/// <summary>
/// Get resolution of eye texture
/// </summary>
/// <param name="w">Width</param>
/// <param name="h">Height</param>
public static void GetResolutionEyeTexture(ref int w, ref int h)
{
if (HMD == null || !SupportedPlatform)
return;
ovrHmdDesc desc = HMD.GetDesc();
ovrFovPort[] eyeFov = new ovrFovPort[2];
eyeFov[0] = desc.DefaultEyeFov[0];
eyeFov[1] = desc.DefaultEyeFov[1];
ovrSizei recommenedTex0Size = HMD.GetFovTextureSize(ovrEyeType.ovrEye_Left, desc.DefaultEyeFov[0], 1.0f);
ovrSizei recommenedTex1Size = HMD.GetFovTextureSize(ovrEyeType.ovrEye_Left, desc.DefaultEyeFov[1], 1.0f);
w = recommenedTex0Size.w + recommenedTex1Size.w;
h = (recommenedTex0Size.h + recommenedTex1Size.h)/2;
}
public ovrEyeRenderDesc[] ConfigureRendering(ovrFovPort[] eyeFovIn, uint distortionCaps)
{
ovrEyeRenderDesc[] eyeRenderDesc = new ovrEyeRenderDesc[] { new ovrEyeRenderDesc(), new ovrEyeRenderDesc() };
ovrRenderAPIConfig renderAPIConfig = new ovrRenderAPIConfig();
if (ovrHmd_ConfigureRendering(HmdPtr, ref renderAPIConfig, distortionCaps, eyeFovIn, eyeRenderDesc))
return eyeRenderDesc;
return null;
}
private static extern bool ovrHmd_ConfigureRendering(IntPtr hmd, ref ovrRenderAPIConfig apiConfig, uint distortionCaps, ovrFovPort[] eyeFovIn, ovrEyeRenderDesc[] eyeRenderDescOut);
