recastnavigation/RecastDemo/Include/InputGeom.h

//
// Copyright (c) 2009-2010 Mikko Mononen memon@inside.org
//
// This software is provided 'as-is', without any express or implied
// warranty.  In no event will the authors be held liable for any damages
// arising from the use of this software.
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
// 1. The origin of this software must not be misrepresented; you must not
//    claim that you wrote the original software. If you use this software
//    in a product, an acknowledgment in the product documentation would be
//    appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
//    misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.
//

#pragma once

#include "ChunkyTriMesh.h"
#include "MeshLoaderObj.h"

static const int MAX_CONVEXVOL_PTS = 12;
struct ConvexVolume
{
	float verts[MAX_CONVEXVOL_PTS * 3];
	float hmin;
	float hmax;
	int nverts;
	int area;
};

struct BuildSettings
{
	/// Cell size in world units
	float cellSize = 0;
	/// Cell height in world units
	float cellHeight = 0;
	/// Agent height in world units
	float agentHeight = 0;
	/// Agent radius in world units
	float agentRadius = 0;
	/// Agent max climb in world units
	float agentMaxClimb = 0;
	/// Agent max slope in degrees
	float agentMaxSlope = 0;
	/// Region minimum size in voxels.
	/// regionMinSize = sqrt(regionMinArea)
	float regionMinSize = 0;
	/// Region merge size in voxels. regionMergeSize = sqrt(regionMergeArea)
	float regionMergeSize = 0;
	/// Edge max length in world units
	float edgeMaxLen = 0;
	/// Edge max error in voxels
	float edgeMaxError = 0;
	float vertsPerPoly = 0;
	/// Detail sample distance in voxels
	float detailSampleDist = 0;
	/// Detail sample max error in voxel heights.
	float detailSampleMaxError = 0;
	/// Partition type, see SamplePartitionType
	int partitionType = 0;
	/// Bounds of the area to mesh
	float navMeshBMin[3] {};
	float navMeshBMax[3] {};
	/// Size of the tiles in voxels
	float tileSize = 0;
};

class InputGeom
{
	rcChunkyTriMesh* m_chunkyMesh = nullptr;
	rcMeshLoaderObj* m_mesh = nullptr;
	float m_meshBMin[3] = {};
	float m_meshBMax[3] = {};
	BuildSettings m_buildSettings;
	bool m_hasBuildSettings = false;

	/// @name Off-Mesh connections.
	///@{
	static const int MAX_OFFMESH_CONNECTIONS = 256;
	float m_offMeshConVerts[MAX_OFFMESH_CONNECTIONS * 3 * 2];
	float m_offMeshConRads[MAX_OFFMESH_CONNECTIONS];
	unsigned char m_offMeshConDirs[MAX_OFFMESH_CONNECTIONS];
	unsigned char m_offMeshConAreas[MAX_OFFMESH_CONNECTIONS];
	unsigned short m_offMeshConFlags[MAX_OFFMESH_CONNECTIONS];
	unsigned int m_offMeshConId[MAX_OFFMESH_CONNECTIONS];
	int m_offMeshConCount = 0;
	///@}

	/// @name Convex Volumes.
	///@{
	static const int MAX_VOLUMES = 256;
	ConvexVolume m_volumes[MAX_VOLUMES];
	int m_volumeCount = 0;
	///@}

	bool loadMesh(class rcContext* ctx, const std::string& filepath);
	bool loadGeomSet(class rcContext* ctx, const std::string& filepath);
public:
	InputGeom() = default;
	~InputGeom()
	{
		delete m_chunkyMesh;
		delete m_mesh;
	}
	InputGeom(const InputGeom&) = delete;
	InputGeom& operator=(const InputGeom&) = delete;
	InputGeom(InputGeom&&) = delete;
	InputGeom& operator=(InputGeom&&) = delete;

	bool load(class rcContext* ctx, const std::string& filepath);
	bool saveGeomSet(const BuildSettings* settings);

	/// Method to return static mesh data.
	const rcMeshLoaderObj* getMesh() const { return m_mesh; }
	const float* getMeshBoundsMin() const { return m_meshBMin; }
	const float* getMeshBoundsMax() const { return m_meshBMax; }
	const float* getNavMeshBoundsMin() const { return m_hasBuildSettings ? m_buildSettings.navMeshBMin : m_meshBMin; }
	const float* getNavMeshBoundsMax() const { return m_hasBuildSettings ? m_buildSettings.navMeshBMax : m_meshBMax; }
	const rcChunkyTriMesh* getChunkyMesh() const { return m_chunkyMesh; }
	const BuildSettings* getBuildSettings() const { return m_hasBuildSettings ? &m_buildSettings : 0; }
	bool raycastMesh(float* src, float* dst, float& tmin);

	/// @name Off-Mesh connections.
	///@{
	int getOffMeshConnectionCount() const { return m_offMeshConCount; }
	const float* getOffMeshConnectionVerts() const { return m_offMeshConVerts; }
	const float* getOffMeshConnectionRads() const { return m_offMeshConRads; }
	const unsigned char* getOffMeshConnectionDirs() const { return m_offMeshConDirs; }
	const unsigned char* getOffMeshConnectionAreas() const { return m_offMeshConAreas; }
	const unsigned short* getOffMeshConnectionFlags() const { return m_offMeshConFlags; }
	const unsigned int* getOffMeshConnectionId() const { return m_offMeshConId; }
	void addOffMeshConnection(
		const float* spos, const float* epos, const float rad,
		unsigned char bidir, unsigned char area, unsigned short flags);
	void deleteOffMeshConnection(int i);
	void drawOffMeshConnections(struct duDebugDraw* dd, bool hilight = false);
	///@}

	/// @name Box Volumes.
	///@{
	int getConvexVolumeCount() const { return m_volumeCount; }
	const ConvexVolume* getConvexVolumes() const { return m_volumes; }
	void addConvexVolume(
		const float* verts, const int nverts,
		const float minh, const float maxh, unsigned char area);
	void deleteConvexVolume(int i);
	void drawConvexVolumes(struct duDebugDraw* dd, bool hilight = false);
	///@}
};