Unified transition patch drawing affects the calculation of
tessellation level metrics. Because a single edge of a shader
patch might be split into two halfs along a transition edge,
the effective maximum number of spans along any adaptive edge
is limited to half of the device maximum.
- Fix crashes on glEvalLimit and glStencilViewer with CLEW
- Currently GPU patch evaluation only supports BSpline patches.
raise an error message in glEvalLimit for the unsupported combinations
until GregoryBasis evaluation will be added to them.
Although valence 2 gregory patch is not well supported yet, this fix
mitigates artifacts around such a vertex.
Adding a shape catmark_gregory_test8 to see this issue.
stb - potential use of uninitialized variable (this may have been safe)
farViewer - unused variable
patchTableFactory - _channelIndices potentially used uninitialized
FVarLevel - valueIndexInFace0 potentially used used uninitialized (was safe)
We'll restore this code and finish it up for the next release.
For now, removing this code restores parity with the 3.0 beta,
i.e. face-varying patches are always all bilinear.
Besides we've not been computing accurate derivatives on gregory patch,
there was a separate bug in shaders which gives completely bogus dUdV on
corner vertices. This change fixes that significant artifact, however,
is still approximating derivatives by ignoring rational components.
- moved TopologyRefiner out of the RefinerFactoryBase into Far
- moved implementation of its Factory<MESH> to far/topologyDescriptor.*
- updated examples and tutorials (no more references to FactoryBase)
There's a lot of good foundational work here to eventually support
smooth interpolation of face-varying patches. Unfortunately, this
is not quite ready to release. Therefore, we've decided to defer this
feature until a later release.
This change hides this code behind the FAR_FVAR_SMOOTH_PATCH macro.
Now the channel specifier is the last parameter in a method's
parameter list with a default of 0. This is consistent with the
topological face-varying queries and also simplifies the common
case of just a single face-varying channel.
- add HLSL equivalents of the previous GLSL change
- rename OsdGetSingleCreaseSegmentParameter to
OsdGetPatchSingleCreaseSegmentParameter.
- add shadingMode UI for dxViewer similar to glViewer
use boundaryMask to identify the crease edge from 4 edges.
with this change, single-crease patch no longer needs to be rotated on
its population.
In shader, experimentally use same infinite sharp matrix for both
boundary and single-crease patch.
