mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
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c399655dcc
Sync'ing the 'dev' branch with the 'feature_3.0dev' branch at commit 68c6d11fc36761ae1a5e6cdc3457be16f2e9704a The branch 'feature_3.0dev' is now locked and preserved for historical purposes.
83 lines
2.7 KiB
C++
83 lines
2.7 KiB
C++
//
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// Copyright 2013 Pixar
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//
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// Licensed under the Apache License, Version 2.0 (the "Apache License")
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// with the following modification; you may not use this file except in
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// compliance with the Apache License and the following modification to it:
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// Section 6. Trademarks. is deleted and replaced with:
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//
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// 6. Trademarks. This License does not grant permission to use the trade
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// names, trademarks, service marks, or product names of the Licensor
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// and its affiliates, except as required to comply with Section 4(c) of
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// the License and to reproduce the content of the NOTICE file.
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//
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// You may obtain a copy of the Apache License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the Apache License with the above modification is
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// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the Apache License for the specific
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// language governing permissions and limitations under the Apache License.
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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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#include <string.h>
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namespace OpenSubdiv {
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namespace OPENSUBDIV_VERSION {
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namespace Osd {
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/// \brief Describes vertex elements in interleaved data buffers
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struct VertexBufferDescriptor {
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/// Default Constructor
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VertexBufferDescriptor() : offset(0), length(0), stride(0) { }
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/// Constructor
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VertexBufferDescriptor(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<stride) and (length<=stride-offset));
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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( VertexBufferDescriptor const & other ) const {
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return (IsValid() and
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other.IsValid() and
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(length==other.length));
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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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/// True if the descriptors are identical
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bool operator == ( VertexBufferDescriptor const other ) const {
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return (offset == other.offset and
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length == other.length and
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stride == other.stride);
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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 Osd
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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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