mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
synced 2024-11-30 07:10:07 +00:00
043369485c
- minor refactoring of the LimitEvalContext to accomodate all the data buffers - pushing some minor sub-patch functionality back to FarPatchParams - extend example code with randomly generated varying vertex colors
244 lines
9.0 KiB
C++
244 lines
9.0 KiB
C++
//
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// Copyright (C) Pixar. All rights reserved.
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//
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// This license governs use of the accompanying software. If you
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// use the software, you accept this license. If you do not accept
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// the license, do not use the software.
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//
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// 1. Definitions
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// The terms "reproduce," "reproduction," "derivative works," and
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// "distribution" have the same meaning here as under U.S.
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// copyright law. A "contribution" is the original software, or
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// any additions or changes to the software.
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// A "contributor" is any person or entity that distributes its
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// contribution under this license.
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// "Licensed patents" are a contributor's patent claims that read
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// directly on its contribution.
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//
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// 2. Grant of Rights
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// (A) Copyright Grant- Subject to the terms of this license,
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// including the license conditions and limitations in section 3,
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// each contributor grants you a non-exclusive, worldwide,
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// royalty-free copyright license to reproduce its contribution,
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// prepare derivative works of its contribution, and distribute
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// its contribution or any derivative works that you create.
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// (B) Patent Grant- Subject to the terms of this license,
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// including the license conditions and limitations in section 3,
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// each contributor grants you a non-exclusive, worldwide,
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// royalty-free license under its licensed patents to make, have
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// made, use, sell, offer for sale, import, and/or otherwise
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// dispose of its contribution in the software or derivative works
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// of the contribution in the software.
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//
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// 3. Conditions and Limitations
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// (A) No Trademark License- This license does not grant you
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// rights to use any contributor's name, logo, or trademarks.
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// (B) If you bring a patent claim against any contributor over
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// patents that you claim are infringed by the software, your
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// patent license from such contributor to the software ends
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// automatically.
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// (C) If you distribute any portion of the software, you must
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// retain all copyright, patent, trademark, and attribution
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// notices that are present in the software.
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// (D) If you distribute any portion of the software in source
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// code form, you may do so only under this license by including a
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// complete copy of this license with your distribution. If you
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// distribute any portion of the software in compiled or object
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// code form, you may only do so under a license that complies
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// with this license.
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// (E) The software is licensed "as-is." You bear the risk of
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// using it. The contributors give no express warranties,
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// guarantees or conditions. You may have additional consumer
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// rights under your local laws which this license cannot change.
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// To the extent permitted under your local laws, the contributors
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// exclude the implied warranties of merchantability, fitness for
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// a particular purpose and non-infringement.
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//
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#ifndef OSD_CPU_VERTEX_DESCRIPTOR_H
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#define OSD_CPU_VERTEX_DESCRIPTOR_H
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#include "../version.h"
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namespace OpenSubdiv {
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namespace OPENSUBDIV_VERSION {
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struct OsdVertexDescriptor {
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/// Constructor
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OsdVertexDescriptor() : numVertexElements(0), numVaryingElements(0) {}
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/// Constructor
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///
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/// @param numVertexElem number of vertex-interpolated data elements (floats)
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///
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/// @param numVaryingElem number of varying-interpolated data elements (floats)
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///
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OsdVertexDescriptor(int numVertexElem, int numVaryingElem)
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: numVertexElements(numVertexElem),
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numVaryingElements(numVaryingElem) { }
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/// Sets descriptor
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///
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/// @param numVertexElem number of vertex-interpolated data elements (floats)
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///
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/// @param numVaryingElem number of varying-interpolated data elements (floats)
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///
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void Set(int numVertexElem, int numVaryingElem) {
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numVertexElements = numVertexElem;
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numVaryingElements = numVaryingElem;
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}
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/// Resets the descriptor
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void Reset() {
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numVertexElements = numVaryingElements = 0;
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}
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/// Returns the total number of elements (vertex + varying)
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int GetNumElements() const {
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return numVertexElements + numVaryingElements;
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}
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bool operator == (OsdVertexDescriptor const & other) {
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return (numVertexElements == other.numVertexElements and
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numVaryingElements == other.numVaryingElements);
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}
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/// Resets the contents of vertex & varying primvar data buffers for a given
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/// vertex.
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///
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/// @param vertex The float array containing the vertex-interpolated primvar
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/// data that needs to be reset.
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///
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/// @param varying The float array containing the varying-interpolated primvar
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/// data that needs to be reset.
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///
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/// @param index Vertex index in the buffer.
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///
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void Clear(float *vertex, float *varying, int index) const {
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if (vertex) {
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for (int i = 0; i < numVertexElements; ++i)
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vertex[index*numVertexElements+i] = 0.0f;
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}
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if (varying) {
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for (int i = 0; i < numVaryingElements; ++i)
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varying[index*numVaryingElements+i] = 0.0f;
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}
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}
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/// Applies "dst += src*weight" to "vertex" primvar data in a vertex buffer.
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///
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/// @param vertex The VertexData buffer
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///
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/// @param dstIndex Index of the destination vertex.
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///
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/// @param srcIndex Index of the origin vertex.
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///
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/// @param weight Weight applied to the primvar data.
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///
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void AddWithWeight(float *vertex, int dstIndex, int srcIndex, float weight) const {
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int d = dstIndex * numVertexElements;
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int s = srcIndex * numVertexElements;
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for (int i = 0; i < numVertexElements; ++i)
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vertex[d++] += vertex[s++] * weight;
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}
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/// Applies "dst += src*weight" to "varying" primvar data in a vertex buffer.
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///
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/// @param varying The VaryingData buffer
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///
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/// @param dstIndex Index of the destination vertex.
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///
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/// @param srcIndex Index of the source vertex.
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///
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/// @param weight Weight applied to the primvar data.
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///
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void AddVaryingWithWeight(float *varying, int dstIndex, int srcIndex, float weight) const {
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int d = dstIndex * numVaryingElements;
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int s = srcIndex * numVaryingElements;
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for (int i = 0; i < numVaryingElements; ++i)
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varying[d++] += varying[s++] * weight;
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}
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/// Applies an "add" vertex edit
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///
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/// @param vertex The primvar data buffer.
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///
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/// @param primVarOffset Offset to the primvar datum.
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///
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/// @param primVarWidth Length of the primvar datum.
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///
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/// @param editIndex The location of the vertex in the buffer.
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///
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/// @param editValues The values to add to the primvar datum.
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///
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void ApplyVertexEditAdd(float *vertex, int primVarOffset, int primVarWidth, int editIndex, const float *editValues) const {
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int d = editIndex * numVertexElements + primVarOffset;
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for (int i = 0; i < primVarWidth; ++i) {
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vertex[d++] += editValues[i];
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}
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}
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/// Applies a "set" vertex edit
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///
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/// @param vertex The primvar data buffer.
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///
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/// @param primVarOffset Offset to the primvar datum.
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///
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/// @param primVarWidth Length of the primvar datum.
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///
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/// @param editIndex The location of the vertex in the buffer.
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///
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/// @param editValues The values to add to the primvar datum.
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///
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void ApplyVertexEditSet(float *vertex, int primVarOffset, int primVarWidth, int editIndex, const float *editValues) const {
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int d = editIndex * numVertexElements + primVarOffset;
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for (int i = 0; i < primVarWidth; ++i) {
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vertex[d++] = editValues[i];
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}
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}
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int numVertexElements;
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int numVaryingElements;
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};
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/// \brief Describes vertex elements in interleaved data buffers
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struct OsdVertexBufferDescriptor {
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/// Default Constructor
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OsdVertexBufferDescriptor() : offset(0), length(0), stride(0) { }
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/// Constructor
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OsdVertexBufferDescriptor(int o, int l, int s) : offset(o), length(l), stride(s) { }
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/// True if the descriptor values are internally consistent
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bool IsValid() const {
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return (length>0) and (offset<length) and (stride>=length);
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}
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/// True if the 'other' descriptor can be used as a destination for
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/// data evaluations.
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bool CanEval( OsdVertexBufferDescriptor const & other ) const {
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return IsValid() and
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other.IsValid() and
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(length==other.length) and
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(other.length <= (stride-offset));
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}
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/// Resets the descriptor to default
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void Reset() {
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offset = length = stride = 0;
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}
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int offset; // offset to desired element data
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int length; // number or length of the data
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int stride; // stride to the next element
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};
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} // end namespace OPENSUBDIV_VERSION
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using namespace OPENSUBDIV_VERSION;
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} // end namespace OpenSubdiv
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#endif /* OSD_CPU_VERTEX_DESCRIPTRO_H */
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