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// This code contains NVIDIA Confidential Information and is disclosed to you
// under a form of NVIDIA software license agreement provided separately to you.
//
// Notice
// NVIDIA Corporation and its licensors retain all intellectual property and
// proprietary rights in and to this software and related documentation and
// any modifications thereto. Any use, reproduction, disclosure, or
// distribution of this software and related documentation without an express
// license agreement from NVIDIA Corporation is strictly prohibited.
//
// ALL NVIDIA DESIGN SPECIFICATIONS, CODE ARE PROVIDED "AS IS.". NVIDIA MAKES
// NO WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR OTHERWISE WITH RESPECT TO
// THE MATERIALS, AND EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF NONINFRINGEMENT,
// MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
//
// Information and code furnished is believed to be accurate and reliable.
// However, NVIDIA Corporation assumes no responsibility for the consequences of use of such
// information or for any infringement of patents or other rights of third parties that may
// result from its use. No license is granted by implication or otherwise under any patent
// or patent rights of NVIDIA Corporation. Details are subject to change without notice.
// This code supersedes and replaces all information previously supplied.
// NVIDIA Corporation products are not authorized for use as critical
// components in life support devices or systems without express written approval of
// NVIDIA Corporation.
//
// Copyright (c) 2016-2018 NVIDIA Corporation. All rights reserved.
#ifndef NVBLASTEXTAUTHORINGMESHNOISER_H
#define NVBLASTEXTAUTHORINGMESHNOISER_H
#include <vector>
#include <map>
#include "NvBlastExtAuthoringInternalCommon.h"
namespace Nv
{
namespace Blast
{
class SimplexNoise;
/**
Structure used on tesselation stage. Maps edge to two neighboor triangles
*/
struct EdgeToTriangles
{
int32_t tr[2];
int32_t c;
EdgeToTriangles()
{
c = 0;
}
/**
Add triangle to edge. Should not be called more than twice for one edge!!!!.
*/
void add(int32_t t)
{
tr[c] = t;
++c;
}
/**
Replaces mapping from one triangle to another.
*/
void replace(int32_t from, int32_t to)
{
if (tr[0] == from)
{
tr[0] = to;
}
else
{
if (c == 2 && tr[1] == from)
{
tr[1] = to;
}
}
}
/**
Get triangle which is mapped by this edge and which index is different than provided.
*/
int32_t getNot(int32_t id)
{
if (tr[0] != id)
{
return tr[0];
}
if (c == 2 && tr[1] != id)
{
return tr[1];
}
return -1;
}
};
/**
Tool for graphic mesh tesselation and adding noise to internal surface. Each triangle must have initialized
Triangle::userInfo field (0 for external surface triangles and != 0 for internal)
*/
class MeshNoiser
{
public:
MeshNoiser()
{
reset();
}
void reset();
/**
Edge flags
*/
enum EdgeFlag { INTERNAL_EDGE, EXTERNAL_BORDER_EDGE, INTERNAL_BORDER_EDGE, EXTERNAL_EDGE, NONE };
/**
Set mesh to tesselate and apply noise
*/
void setMesh(const std::vector<Triangle>& mesh);
/**
Tesselate internal surface.
\param[in] maxLen - maximal length of edge on internal surface.
*/
void tesselateInternalSurface(float maxLen);
/**
Apply noise to internal surface. Must be called only after tesselation!!!
\param[in] noise - noise generator
\param[in] falloff - damping of noise around of external surface
\param[in] relaxIterations - number of smoothing iterations before applying noise
\param[in] relaxFactor - amount of smooting before applying noise.
*/
void applyNoise(SimplexNoise& noise, float falloff, int32_t relaxIterations, float relaxFactor);
std::vector<Triangle> getMesh();
private:
physx::PxVec3 mOffset;
float mScale;
bool isTesselated;
/**
Mesh data
*/
std::vector<Vertex> mVertices;
std::vector<TriangleIndexed> mTriangles;
std::vector<Edge> mEdges;
std::map<Vertex, int32_t, VrtComp> mVertMap;
std::map<Edge, int32_t> mEdgeMap;
/**
Final triangles.
*/
std::vector<Triangle> mResultTriangles;
int32_t addVerticeIfNotExist(const Vertex& p);
int32_t addEdge(const Edge& e);
int32_t findEdge(const Edge& e);
void collapseEdge(int32_t id);
void divideEdge(int32_t id);
void updateVertEdgeInfo();
void updateEdgeTriangleInfo();
void relax(int32_t iterations, float factor, std::vector<Vertex>& vertices);
void recalcNoiseDirs();
std::vector<bool> mRestrictionFlag;
std::vector<EdgeFlag> mEdgeFlag;
std::vector<EdgeToTriangles> mTrMeshEdToTr;
std::vector<int32_t> mVertexValence;
std::vector<std::vector<int32_t> > mVertexToTriangleMap;
std::vector<float> mVerticesDistances;
std::vector<physx::PxVec3> mVerticesNormalsSmoothed;
std::vector<uint32_t> mPositionMappedVrt;
std::vector<std::vector<int32_t> > mGeometryGraph;
void prebuildEdgeFlagArray();
void computePositionedMapping();
void computeFalloffAndNormals();
void prebuildTesselatedTriangles();
};
} // namespace Blast
} // namespace Nv
#endif // ! NVBLASTEXTAUTHORINGMESHNOISER_H
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