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//
// Copyright (C) 2009-2021 Intel Corporation
//
// SPDX-License-Identifier: MIT
//
//
#include "GRLGen12.h"
#pragma once
#define sizeof_Quad 64
#define sizeof_Procedural 64
#define sizeof_PrimRef 32
#define sizeof_PresplitItem 8
#define sizeof_HwInstanceLeaf 128
#define MORTON_BUILDER_SUBTREE_THRESHOLD 256
#define MORTON_BUILDER_P2_ELEMENTS_IN_SLM 16 * 1024 / 32
// Temporarily disable localized phase2 due to issues in ELG presi
// This implementation would be replaced with bottom_up + bounding box approach without the need for phase2 refit
#define MORTON_BUILDER_P2_SINGLE_WG_THRESHOLD /*100000*/ 0
#define BVH_QUAD_NODE 4
#define BVH_INSTANCE_NODE 1
#define BVH_INTERNAL_NODE 0
#define BVH_PROCEDURAL_NODE 3
#define BUILDRECORD_STACK_SIZE 48
#define BINS 16
GRL_NAMESPACE_BEGIN(GRL)
GRL_NAMESPACE_BEGIN(RTAS)
GRL_NAMESPACE_BEGIN(GPUBVHBuilder)
struct AABB
{
float4 lower;
float4 upper;
};
typedef struct BlockAllocator
{
unsigned int start;
unsigned int cur;
} BlockAllocator;
struct Globals
{
struct AABB centroidBounds;
unsigned int build_record_start;
unsigned int numPrimitives;
unsigned int leafPrimType;
unsigned int leafSize;
unsigned int numSplittedPrimitives;
unsigned int numBuildRecords;
// spatial split sate
unsigned int numOriginalPrimitives;
float presplitPrioritySum;
float probThreshold;
// binned-sah bfs state
unsigned int counter;
unsigned int numBuildRecords_extended;
// sync variable used for global-sync on work groups
unsigned int sync;
/* morton code builder state */
unsigned int shift; // used by adaptive mc-builder
unsigned int shift_mask; // used by adaptive mc-builder
unsigned int binary_hierarchy_root;
unsigned int p0_allocated_num;
unsigned int p0_created_num;
unsigned int morton_sort_in_flight;
unsigned int sort_iterations;
gpuva_t binary_hierarchy_buffer; // pointer to the binary morton code hierarchy. Stashed here as a debug aid
};
struct Range
{
unsigned int start, end;
};
struct Triangle
{
unsigned int vtx[3];
//unsigned int primID;
//unsigned int geomID;
};
struct MortonCodePrimitive
{
uint64_t index_code; // 64bit code + index combo
};
struct BuildRecord
{
struct AABB centroidBounds;
unsigned int start, end;
__global void *current;
};
struct BinaryMortonCodeHierarchy
{
struct Range range;
unsigned int leftChild;
unsigned int rightChild;
// unsigned int flag;
};
typedef struct MortonFlattenedBoxlessNode {
uint binary_hierarchy_index; // only needed when type != BVH_INTERNAL_NODE
uint childOffset_type; // childOffset : 26, type : 6
uint backPointer; // same usage as in bvh
} MortonFlattenedBoxlessNode;
struct StatStackEntry
{
struct AABB aabb;
unsigned int node;
unsigned int type;
unsigned int depth;
float area;
};
struct BuildRecordMorton
{
unsigned int nodeID;
unsigned int items;
unsigned int current_index;
unsigned int parent_index;
};
struct Split
{
float sah;
int dim;
int pos;
};
struct BinMapping
{
float4 ofs, scale;
};
struct BinInfo
{
struct AABB3f boundsX[BINS];
struct AABB3f boundsY[BINS];
struct AABB3f boundsZ[BINS];
uint3 counts[BINS];
};
struct BinInfo2
{
struct AABB3f boundsX[BINS * 2];
struct AABB3f boundsY[BINS * 2];
struct AABB3f boundsZ[BINS * 2];
uint3 counts[BINS * 2];
};
struct GlobalBuildRecord
{
struct BinInfo2 binInfo;
struct BinMapping binMapping;
struct Split split;
struct Range range;
struct AABB leftCentroid;
struct AABB rightCentroid;
struct AABB leftGeometry;
struct AABB rightGeometry;
unsigned int atomicCountLeft;
unsigned int atomicCountRight;
unsigned int buildRecordID;
};
GRL_NAMESPACE_END(GPUBVHBuilder)
GRL_NAMESPACE_END(RTAS)
GRL_NAMESPACE_END(GRL)
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