GLMeshRender.h

/*This file is part of the FEBio Studio source code and is licensed under the MIT license
listed below.

See Copyright-FEBio-Studio.txt for details.

Copyright (c) 2021 University of Utah, The Trustees of Columbia University in
the City of New York, and others.

Permission is hereby granted, free of charge, to any person obtaining a copy
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in the Software without restriction, including without limitation the rights
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The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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SOFTWARE.*/

#pragma once
#include <FSCore/color.h>
#include <functional>
#include "GLMesh.h"
#include <MeshLib/GMesh.h>

class FEElement_;
class FSNode;
class FSEdge;
class FSFace;
class FSLineMesh;
class FSCoreMesh;
class FSMeshBase;
class GMesh;
class CGLContext;
class FSMesh;
class Transform;

class GLMeshRender
{
public:
	enum RenderMode {
		DefaultMode,
		SelectionMode,
		OutlineMode
	};
public:
	GLMeshRender();

	void ShowShell2Hex(bool b) { m_bShell2Solid = b; }
	bool ShowShell2Hex() { return m_bShell2Solid; }

	void SetSolidBeamRadiusScale(float f) { m_bSolidBeamRadius = f; }
	float GetSolidBeamRadiusScale() const { return m_bSolidBeamRadius; }

	void ShowBeam2Hex(bool b) { m_bBeam2Solid = b; }
	bool ShowBeam2Hex() { return m_bBeam2Solid; }

	void SetPointSize(float f) { m_pointSize = f; }

	void SetDivisions(int ndivs) { m_ndivs = ndivs; }

public:
	void SetRenderMode(RenderMode mode);

	void PushState();
	void PopState();

public:
	void RenderGLMesh(GMesh* pm);
	void RenderGLMesh(GMesh& pm, GLColor c);
	void RenderGLMesh(GMesh* pm, std::function<void(const GMesh::FACE& face)> f);

	void RenderGLMesh(GMesh* pm, int surfID);
	void RenderGLEdges(GMesh* pm);
	void RenderGLEdges(GMesh* pm, int nedge);
	void RenderOutline(CGLContext& rc, GMesh* pm, const Transform& T, bool outline = false);
	void RenderSurfaceOutline(CGLContext& rc, GMesh* pm, const Transform& T, int surfID);

public:
	void RenderFENodes(FSLineMesh* mesh);
	void RenderFENodes(FSLineMesh& mesh, std::function<bool(const FSNode& node)> f);
	void RenderFENodes(FSLineMesh& mesh, std::vector<int>& nodeList);

public:
	void RenderFEEdges(FSLineMesh& mesh, std::function<bool(const FSEdge& edge)> f);

	void RenderSelectedFEEdges(FSLineMesh* pm);
	void RenderUnselectedFEEdges(FSLineMesh* pm);

	void RenderMeshLines(const GMesh& m);

	void RenderMeshLines(FSMeshBase* pm);
	void RenderGMeshLines(GMesh* pm);
	void RenderMeshLines(FSMesh& mesh, std::function<bool(const FEElement_& el)> f);

	void RenderFEFaces(FSMeshBase* pm, const std::vector<int>& faceList);
	void RenderFEFaces(FSMeshBase* pm, const std::vector<FSFace>& faceList, std::function<bool(const FSFace& face)> f);
	void RenderFEFaces(FSMeshBase* pm, std::function<bool(const FSFace& face)> f);
	void RenderFEFaces(FSMeshBase* pm, const std::vector<int>& faceList, std::function<bool(const FSFace& face)> f);
	void RenderFEFaces(FSCoreMesh* pm, const std::vector<int>& faceList, std::function<bool(const FSFace& face, GLColor* c)> f);

	void RenderFEFaces(FSCoreMesh* pm, std::function<bool(const FSFace& face, GLColor* c)> f);

	void RenderFESurfaceMeshFaces(FSMeshBase* pm, std::function<bool(const FSFace& face, GLColor* c)> f);

	void RenderFEFacesOutline(FSMeshBase* pm, const std::vector<int>& faceList);
	void RenderFEFacesOutline(FSCoreMesh* pm, const std::vector<FSFace*>& faceList);
	void RenderFEFacesOutline(FSMeshBase* pm, std::function<bool(const FSFace& face)> f);

	void RenderFEElementsOutline(FSMesh& mesh, const std::vector<int>& elemList);
	void RenderFEElementsOutline(FSCoreMesh* pm, const std::vector<FEElement_*>& elemList);

private:
	void RenderElementOutline(FEElement_& el, FSCoreMesh* pm);

public:
	void RenderFEElements(FSMesh& mesh, const std::vector<int>& elemList, bool bsel = false);
	void RenderFEElements(FSMesh& mesh, std::function<bool(const FEElement_& el)> f);
	void RenderFEElements(FSMesh& mesh, std::function<bool(const FEElement_& el, GLColor* c)> f);
	void RenderFEElements(FSMesh& mesh, const std::vector<int>& elemList, std::function<bool(const FEElement_& el)> f);

	void RenderNormals(FSMeshBase* pm, float scale, int tag);

public:
	void RenderBEAM2(FEElement_* pe, FSCoreMesh* pm, bool bsel);
	void RenderBEAM3(FEElement_* pe, FSCoreMesh* pm, bool bsel);

private:
	// drawing routines for faces
	void RenderFEFace(const FSFace& face, FSMeshBase* pm);
	void RenderFace(FSFace& face, FSCoreMesh* pm);
	void RenderFace(FSFace& face, FSCoreMesh* pm, GLColor c[4]);

	void RenderFESurfaceMeshFace(FSFace& face, FSMeshBase* pm, GLColor c[4]);

public:
	void RenderFaceOutline(FSFace& face, FSCoreMesh* pm);

	void SetFaceColor(bool b);
	bool GetFaceColor() const;

private:
	// special render routines for thick shells
	void RenderThickShell(const FSFace& face, FSCoreMesh* pm);
	void RenderThickQuad(const FSFace& face, FSCoreMesh* pm);
	void RenderThickTri(const FSFace& face, FSCoreMesh* pm);
	void RenderThickShellOutline(FSFace& face, FSCoreMesh* pm);

public:
	int			m_ndivs;			//!< divisions for smooth render
	bool		m_bShell2Solid;		//!< render shells as solid
	bool		m_bBeam2Solid;		//!< render beams (truss, line elements) as solid
	float		m_bSolidBeamRadius;	//!< radius scale factor when rendering beams as solid
	int			m_nshellref;		//!< shell reference surface
	float		m_pointSize;		//!< size of points
	bool		m_bfaceColor;		//!< use face colors when rendering
	RenderMode	m_renderMode;

private:
	GLTriMesh	m_glmesh;
};