7377d411b4
around the volume. We generate a tight mesh around the active voxels of the volume in order to effectively skip empty space, and start volume ray marching as close to interesting volume data as possible. See code comments for details on how the mesh generation algorithm works. This gives up to 2x speedups in some scenes. Reviewed by: brecht, dingto Reviewers: #cycles Subscribers: lvxejay, jtheninja, brecht Differential Revision: https://developer.blender.org/D3038
100 lines
2.6 KiB
C
100 lines
2.6 KiB
C
/*
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* Copyright 2011-2017 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the 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 License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __UTIL_MATH_INT3_H__
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#define __UTIL_MATH_INT3_H__
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#ifndef __UTIL_MATH_H__
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# error "Do not include this file directly, include util_types.h instead."
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#endif
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CCL_NAMESPACE_BEGIN
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/*******************************************************************************
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* Declaration.
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*/
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#ifndef __KERNEL_OPENCL__
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ccl_device_inline int3 min(int3 a, int3 b);
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ccl_device_inline int3 max(int3 a, int3 b);
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ccl_device_inline int3 clamp(const int3& a, int mn, int mx);
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ccl_device_inline int3 clamp(const int3& a, int3& mn, int mx);
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#endif /* !__KERNEL_OPENCL__ */
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/*******************************************************************************
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* Definition.
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*/
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#ifndef __KERNEL_OPENCL__
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ccl_device_inline int3 min(int3 a, int3 b)
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{
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#if defined(__KERNEL_SSE__) && defined(__KERNEL_SSE41__)
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return int3(_mm_min_epi32(a.m128, b.m128));
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#else
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return make_int3(min(a.x, b.x), min(a.y, b.y), min(a.z, b.z));
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#endif
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}
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ccl_device_inline int3 max(int3 a, int3 b)
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{
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#if defined(__KERNEL_SSE__) && defined(__KERNEL_SSE41__)
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return int3(_mm_max_epi32(a.m128, b.m128));
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#else
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return make_int3(max(a.x, b.x), max(a.y, b.y), max(a.z, b.z));
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#endif
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}
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ccl_device_inline int3 clamp(const int3& a, int mn, int mx)
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{
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#ifdef __KERNEL_SSE__
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return min(max(a, make_int3(mn)), make_int3(mx));
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#else
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return make_int3(clamp(a.x, mn, mx), clamp(a.y, mn, mx), clamp(a.z, mn, mx));
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#endif
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}
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ccl_device_inline int3 clamp(const int3& a, int3& mn, int mx)
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{
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#ifdef __KERNEL_SSE__
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return min(max(a, mn), make_int3(mx));
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#else
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return make_int3(clamp(a.x, mn.x, mx),
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clamp(a.y, mn.y, mx),
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clamp(a.z, mn.z, mx));
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#endif
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}
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#endif /* !__KERNEL_OPENCL__ */
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ccl_device_inline bool operator==(const int3 &a, const int3 &b)
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{
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return a.x == b.x && a.y == b.y && a.z == b.z;
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}
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ccl_device_inline bool operator!=(const int3 &a, const int3 &b)
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{
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return !(a == b);
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}
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ccl_device_inline bool operator<(const int3 &a, const int3 &b)
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{
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return a.x < b.x && a.y < b.y && a.z < b.z;
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}
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CCL_NAMESPACE_END
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#endif /* __UTIL_MATH_INT3_H__ */
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