125 lines
3.6 KiB
C++
125 lines
3.6 KiB
C++
// Copyright 2009-2020 Intel Corporation
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// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include "rtcore_scene.h"
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RTC_NAMESPACE_BEGIN
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/* Opaque BVH type */
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typedef struct RTCBVHTy* RTCBVH;
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/* Input build primitives for the builder */
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struct RTC_ALIGN(32) RTCBuildPrimitive
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{
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float lower_x, lower_y, lower_z;
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unsigned int geomID;
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float upper_x, upper_y, upper_z;
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unsigned int primID;
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};
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/* Opaque thread local allocator type */
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typedef struct RTCThreadLocalAllocatorTy* RTCThreadLocalAllocator;
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/* Callback to create a node */
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typedef void* (*RTCCreateNodeFunction) (RTCThreadLocalAllocator allocator, unsigned int childCount, void* userPtr);
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/* Callback to set the pointer to all children */
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typedef void (*RTCSetNodeChildrenFunction) (void* nodePtr, void** children, unsigned int childCount, void* userPtr);
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/* Callback to set the bounds of all children */
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typedef void (*RTCSetNodeBoundsFunction) (void* nodePtr, const struct RTCBounds** bounds, unsigned int childCount, void* userPtr);
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/* Callback to create a leaf node */
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typedef void* (*RTCCreateLeafFunction) (RTCThreadLocalAllocator allocator, const struct RTCBuildPrimitive* primitives, size_t primitiveCount, void* userPtr);
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/* Callback to split a build primitive */
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typedef void (*RTCSplitPrimitiveFunction) (const struct RTCBuildPrimitive* primitive, unsigned int dimension, float position, struct RTCBounds* leftBounds, struct RTCBounds* rightBounds, void* userPtr);
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/* Build flags */
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enum RTCBuildFlags
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{
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RTC_BUILD_FLAG_NONE = 0,
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RTC_BUILD_FLAG_DYNAMIC = (1 << 0),
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};
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enum RTCBuildConstants
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{
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RTC_BUILD_MAX_PRIMITIVES_PER_LEAF = 32
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};
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/* Input for builders */
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struct RTCBuildArguments
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{
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size_t byteSize;
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enum RTCBuildQuality buildQuality;
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enum RTCBuildFlags buildFlags;
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unsigned int maxBranchingFactor;
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unsigned int maxDepth;
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unsigned int sahBlockSize;
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unsigned int minLeafSize;
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unsigned int maxLeafSize;
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float traversalCost;
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float intersectionCost;
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RTCBVH bvh;
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struct RTCBuildPrimitive* primitives;
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size_t primitiveCount;
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size_t primitiveArrayCapacity;
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RTCCreateNodeFunction createNode;
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RTCSetNodeChildrenFunction setNodeChildren;
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RTCSetNodeBoundsFunction setNodeBounds;
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RTCCreateLeafFunction createLeaf;
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RTCSplitPrimitiveFunction splitPrimitive;
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RTCProgressMonitorFunction buildProgress;
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void* userPtr;
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};
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/* Returns the default build settings. */
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RTC_FORCEINLINE struct RTCBuildArguments rtcDefaultBuildArguments()
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{
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struct RTCBuildArguments args;
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args.byteSize = sizeof(args);
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args.buildQuality = RTC_BUILD_QUALITY_MEDIUM;
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args.buildFlags = RTC_BUILD_FLAG_NONE;
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args.maxBranchingFactor = 2;
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args.maxDepth = 32;
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args.sahBlockSize = 1;
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args.minLeafSize = 1;
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args.maxLeafSize = RTC_BUILD_MAX_PRIMITIVES_PER_LEAF;
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args.traversalCost = 1.0f;
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args.intersectionCost = 1.0f;
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args.bvh = NULL;
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args.primitives = NULL;
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args.primitiveCount = 0;
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args.primitiveArrayCapacity = 0;
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args.createNode = NULL;
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args.setNodeChildren = NULL;
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args.setNodeBounds = NULL;
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args.createLeaf = NULL;
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args.splitPrimitive = NULL;
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args.buildProgress = NULL;
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args.userPtr = NULL;
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return args;
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}
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/* Creates a new BVH. */
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RTC_API RTCBVH rtcNewBVH(RTCDevice device);
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/* Builds a BVH. */
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RTC_API void* rtcBuildBVH(const struct RTCBuildArguments* args);
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/* Allocates memory using the thread local allocator. */
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RTC_API void* rtcThreadLocalAlloc(RTCThreadLocalAllocator allocator, size_t bytes, size_t align);
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/* Retains the BVH (increments reference count). */
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RTC_API void rtcRetainBVH(RTCBVH bvh);
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/* Releases the BVH (decrements reference count). */
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RTC_API void rtcReleaseBVH(RTCBVH bvh);
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RTC_NAMESPACE_END
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