private static extern void ovrHmd_DestroyDistortionMesh(ref DistortionMesh_Raw meshData);
internal DistortionMesh(DistortionMesh_Raw raw)
{
this.VertexCount = raw.VertexCount;
this.pVertexData = new DistortionVertex[this.VertexCount];
this.IndexCount = raw.IndexCount;
this.pIndexData = new short[this.IndexCount];
// Copy data
System.Type vertexType = typeof(DistortionVertex);
Int32 vertexSize = Marshal.SizeOf(vertexType);
Int32 indexSize = sizeof(short);
Int64 pvertices = raw.pVertexData.ToInt64();
Int64 pindices = raw.pIndexData.ToInt64();
// TODO: Investigate using Marshal.Copy() or Buffer.BlockCopy() for improved performance
for (int i = 0; i < raw.VertexCount; i++)
{
pVertexData[i] = (DistortionVertex)Marshal.PtrToStructure(new IntPtr(pvertices), vertexType);
pvertices += vertexSize;
}
// Indices are stored as shorts.
for (int j = 0; j < raw.IndexCount; j++)
{
pIndexData[j] = Marshal.ReadInt16(new IntPtr(pindices));
pindices += indexSize;
}
}
/// <summary>
/// Generate distortion mesh per eye.
/// Distortion capabilities will depend on 'distortionCaps' flags. Users should
/// render using the appropriate shaders based on their settings.
/// Distortion mesh data will be allocated and written 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 overridden here.
/// </summary>
public DistortionMesh? CreateDistortionMesh(Eye eye, FovPort fov, uint distortionCaps)
{
DistortionMesh_Raw rawMesh = new DistortionMesh_Raw();
bool result = ovrHmd_CreateDistortionMesh(HmdPtr, eye, fov, distortionCaps, out rawMesh) != 0;
if (!result)
{
return null;
}
DistortionMesh mesh = new DistortionMesh(rawMesh);
ovrHmd_DestroyDistortionMesh(ref rawMesh);
return mesh;
}
public DistortionMesh? CreateDistortionMeshDebug(Eye eye, FovPort fov, uint distortionCaps, float debugEyeReliefOverrideInMeters)
{
DistortionMesh_Raw rawMesh = new DistortionMesh_Raw();
bool result = ovrHmd_CreateDistortionMeshDebug(
HmdPtr,
eye,
fov,
distortionCaps,
out rawMesh,
debugEyeReliefOverrideInMeters) != 0;
if (!result)
{
return null;
}
DistortionMesh mesh = new DistortionMesh(rawMesh);
ovrHmd_DestroyDistortionMesh(ref rawMesh);
return mesh;
}