SLPolygon creates a convex polyon mesh. More...

#include <SLPolygon.h>

Inheritance diagram for SLPolygon:

Public Member Functions
	SLPolygon (SLAssetManager assetMgr, const SLVVec3f &corner, const SLstring &name="polygon mesh", SLMaterial mat=nullptr)
	ctor for generic convex polygon More...

	SLPolygon (SLAssetManager assetMgr, const SLVVec3f &corners, const SLVVec2f &texcoords, const SLstring &name="polygon mesh", SLMaterial mat=nullptr)
	ctor for generic convex polygon with texCoords More...

	SLPolygon (SLAssetManager assetMgr, SLfloat width, SLfloat height, const SLstring &name, SLMaterial mat=nullptr)
	ctor for centered rectangle in x-y-plane (N=-z) More...

void	buildMesh (SLMaterial *mat)
	SLPolygon::buildMesh fills in the underlying arrays from the SLMesh object. More...

Public Member Functions inherited from SLMesh
	SLMesh (SLAssetManager *assetMgr, const SLstring &name="Mesh")
	Construct a new SLMesh::SLMesh object. More...

	~SLMesh () override
	The destructor deletes everything by calling deleteData. More...

virtual void	init (SLNode *node)
	SLMesh::shapeInit sets the transparency flag of the AABB. More...

virtual void	draw (SLSceneView sv, SLNode node, SLuint intances=0)

void	drawIntoDepthBuffer (SLSceneView sv, SLNode node, SLMaterial *depthMat)
	Simplified drawing method for shadow map creation. More...

void	addStats (SLNodeStats &stats)

virtual void	buildAABB (SLAABBox &aabb, const SLMat4f &wmNode)

void	updateAccelStruct ()

SLbool	hit (SLRay ray, SLNode node)

virtual void	preShade (SLRay *ray)

virtual void	deleteData ()
	SLMesh::deleteData deletes all mesh data and vbo's. More...

virtual void	deleteDataGpu ()

void	deleteSelected (SLNode *node)
	Deletes the rectangle selected vertices and the dependent triangles. More...

void	deleteUnused ()
	Deletes unused vertices (= vertices that are not indexed in I16 or I32) More...

virtual void	calcMinMax ()

virtual void	calcNormals ()
	SLMesh::calcNormals recalculates vertex normals for triangle meshes. More...

void	calcCenterRad (SLVec3f &center, SLfloat &radius)

SLbool	hitTriangleOS (SLRay ray, SLNode node, SLuint iT)

virtual void	generateVAO (SLGLVertexArray &vao)
	Generate the Vertex Array Object for a specific shader program. More...

void	computeHardEdgesIndices (float angleRAD, float epsilon)
	computes the hard edges and stores the vertex indexes separately More...

void	transformSkin (bool forceCPUSkinning, const std::function< void(SLMesh *)> &cbInformNodes)
	Transforms the vertex positions and normals with by joint weights. More...

void	deselectPartialSelection ()

SLMaterial *	mat () const

SLMaterial *	matOut () const

SLGLPrimitiveType	primitive () const

const SLAnimSkeleton *	skeleton () const

SLuint	numI () const

SLGLVertexArray &	vao ()

SLbool	isSelected () const

SLfloat	edgeAngleDEG () const

SLfloat	edgeWidth () const

SLCol4f	edgeColor () const

SLVec3f	finalP (SLuint i)

SLVec3f	finalN (SLuint i)

SLbool	accelStructIsOutOfDate ()

void	mat (SLMaterial *m)

void	matOut (SLMaterial *m)

void	primitive (SLGLPrimitiveType pt)

void	skeleton (SLAnimSkeleton *skel)

void	isSelected (bool isSelected)

void	edgeWidth (SLfloat ew)

void	edgeAngleDEG (SLfloat ea)

void	edgeColor (const SLCol4f &ec)

void	vertexPosEpsilon (SLfloat eps)

Public Member Functions inherited from SLObject
	SLObject (const SLstring &Name="", const SLstring &url="")

virtual	~SLObject ()

void	name (const SLstring &Name)

void	url (const SLstring &url)

const SLstring &	name () const

const SLstring &	url () const

Protected Attributes
SLVVec3f	_corners
	corners in ccw order More...

SLVVec2f	_uv1
	texture coords for corners More...

Protected Attributes inherited from SLMesh
SLGLPrimitiveType	_primitive
	Primitive type (default triangles) More...

SLMaterial *	_mat
	Pointer to the inside material. More...

SLMaterial *	_matOut
	Pointer to the outside material. More...

SLGLVertexArray	_vao
	Main OpenGL Vertex Array Object for drawing. More...

SLGLVertexArrayExt	_vaoN
	OpenGL VAO for optional normal drawing. More...

SLGLVertexArrayExt	_vaoT
	OpenGL VAO for optional tangent drawing. More...

SLGLVertexArrayExt	_vaoS
	OpenGL VAO for optional selection drawing. More...

SLbool	_isSelected
	Flag if mesh is partially of fully selected. More...

SLfloat	_edgeAngleDEG
	Edge crease angle in degrees between face normals (30 deg. default) More...

SLfloat	_edgeWidth
	Line width for hard edge drawing. More...

SLCol4f	_edgeColor
	Color for hard edge drawing. More...

SLfloat	_vertexPosEpsilon
	Vertex position epsilon used in computeHardEdgesIndices. More...

SLbool	_isVolume
	Flag for RT if mesh is a closed volume. More...

SLAccelStruct *	_accelStruct
	KD-tree or uniform grid. More...

SLbool	_accelStructIsOutOfDate
	Flag if accel. struct needs update. More...

SLAnimSkeleton *	_skeleton
	The skeleton this mesh is bound to. More...

SLVMat4f	_jointMatrices
	Joint matrix vector for this mesh. More...

SLbool	_isCPUSkinned
	Flag if mesh has been skinned on CPU during update. More...

SLVVec3f *	_finalP
	Pointer to final vertex position vector. More...

SLVVec3f *	_finalN
	pointer to final vertex normal vector More...

Protected Attributes inherited from SLObject
SLstring	_name
	name of an object More...

SLstring	_url
	uniform resource locator More...

Additional Inherited Members
Static Public Member Functions inherited from SLMesh
static void	calcTex3DMatrix (SLNode *node)

Public Attributes inherited from SLMesh
SLVVec3f	P
	Vector for vertex positions layout (location = 0) More...

SLVVec3f	N
	Vector for vertex normals (opt.) layout (location = 1) More...

SLVVec2f	UV [2]
	Array of 2 Vectors for tex. coords. (opt.) layout (location = 2) More...

SLVCol4f	C
	Vector of vertex colors (opt.) layout (location = 4) More...

SLVVec4f	T
	Vector of vertex tangents (opt.) layout (location = 5) More...

SLVVuchar	Ji
	2D Vector of per vertex joint ids (opt.) layout (location = 6) More...

SLVVfloat	Jw
	2D Vector of per vertex joint weights (opt.) layout (location = 7) More...

SLVVec3f	skinnedP
	temp. vector for CPU skinned vertex positions More...

SLVVec3f	skinnedN
	temp. vector for CPU skinned vertex normals More...

SLVushort	I16
	Vector of vertex indices 16 bit. More...

SLVuint	I32
	Vector of vertex indices 32 bit. More...

SLVuint	IS32
	Vector of rectangle selected vertex indices 32 bit. More...

SLVushort	IE16
	Vector of hard edges vertex indices 16 bit (see computeHardEdgesIndices) More...

SLVuint	IE32
	Vector of hard edges vertex indices 32 bit (see computeHardEdgesIndices) More...

SLVec3f	minP
	min. vertex in OS More...

SLVec3f	maxP
	max. vertex in OS More...

Detailed Description

SLPolygon creates a convex polyon mesh.

The SLPolygon node draws a convex polygon with. The normale vector is calculated from the first 3 vertices.

Remarks: It is important that during instantiation NO OpenGL functions (gl*) get called because this constructor will be most probably called in a parallel thread from within an SLScene::registerAssetsToLoad or SLScene::assemble function. All objects that get rendered have to do their OpenGL initialization when they are used the first time during rendering in the main thread. For this mesh it means that the objects for OpenGL drawing (_vao, _vaoP, _vaoN, _vaoT and _vaoS) remain unused until the first frame is rendered.

Definition at line 28 of file SLPolygon.h.

Constructor & Destructor Documentation

◆ SLPolygon() [1/3]

SLPolygon::SLPolygon	(	SLAssetManager *	assetMgr,
		const SLVVec3f &	corner,
		const SLstring &	name = `"polygon mesh"`,
		SLMaterial *	mat = `nullptr`
	)

ctor for generic convex polygon

SLPolygon ctor with corner points vector.

Definition at line 14 of file SLPolygon.cpp.

   : SLMesh(assetMgr, name)
 {
     assert(corners.size() > 2);
     _corners = corners;
     buildMesh(mat);
 }

◆ SLPolygon() [2/3]

SLPolygon::SLPolygon	(	SLAssetManager *	assetMgr,
		const SLVVec3f &	corners,
		const SLVVec2f &	texcoords,
		const SLstring &	name = `"polygon mesh"`,
		SLMaterial *	mat = `nullptr`
	)

ctor for generic convex polygon with texCoords

SLPolygon ctor with corner points and its texture coords vector.

Definition at line 26 of file SLPolygon.cpp.

                                           : SLMesh(assetMgr, name)
 {
     assert(corners.size() > 2 && texCoords.size() == corners.size());
     _corners = corners;
     _uv1     = texCoords;
     buildMesh(mat);
 }

◆ SLPolygon() [3/3]

SLPolygon::SLPolygon	(	SLAssetManager *	assetMgr,
		SLfloat	width,
		SLfloat	height,
		const SLstring &	name,
		SLMaterial *	mat = `nullptr`
	)

ctor for centered rectangle in x-y-plane (N=-z)

SLPolygon ctor for centered light rectangle in x/y-plane w. N=-z.

Definition at line 39 of file SLPolygon.cpp.

                                           : SLMesh(assetMgr, name)
 {
     assert(width > 0 && height > 0);
     SLfloat hw = width * 0.5f;
     SLfloat hh = height * 0.5f;
     _corners.push_back(SLVec3f(hw, hh));
     _corners.push_back(SLVec3f(hw, -hh));
     _corners.push_back(SLVec3f(-hw, -hh));
     _corners.push_back(SLVec3f(-hw, hh));
     buildMesh(mat);
 }

Member Function Documentation

◆ buildMesh()

void SLPolygon::buildMesh ( SLMaterial * mat )

SLPolygon::buildMesh fills in the underlying arrays from the SLMesh object.

Definition at line 56 of file SLPolygon.cpp.

 {
     _isVolume = false;
  
     deleteData();
  
     // Check max. allowed no. of verts
     if (_corners.size() >= 65535)
         SL_EXIT_MSG("SLPolygon::buildMesh: NO. of vertices exceeds the maximum (65535) allowed.");
  
     // allocate vectors of SLMesh
     P.clear();
     P.resize(_corners.size());
     N.clear();
     N.resize(P.size());
     if (!_uv1.empty())
     {
         UV[0].clear();
         UV[0].resize(P.size());
     }
     UV[1].clear();
     I16.clear();
     I16.resize((P.size() - 2) * 3);
  
     // Calculate normal from the first 3 corners
     SLVec3f v1(_corners[0] - _corners[1]);
     SLVec3f v2(_corners[0] - _corners[2]);
     SLVec3f n(v1 ^ v2);
     n.normalize();
  
     // Set one default material index
     mat(material);
  
     // Copy vertices and normals
     for (SLushort i = 0; i < (SLushort)P.size(); ++i)
     {
         P[i] = _corners[i];
         N[i] = n;
         if (!UV[0].empty()) UV[0][i] = _uv1[i];
     }
  
     // Build face vertex indices
     for (SLushort f = 0; f < (SLushort)_corners.size() - 2; ++f)
     {
         SLuint i   = f * 3;
         I16[i]     = 0;
         I16[i + 1] = f + 1;
         I16[i + 2] = f + 2;
     }
 }

Member Data Documentation

◆ _corners

SLVVec3f SLPolygon::_corners

protected

corners in ccw order

Definition at line 54 of file SLPolygon.h.

◆ _uv1

SLVVec2f SLPolygon::_uv1

protected

texture coords for corners

Definition at line 55 of file SLPolygon.h.

The documentation for this class was generated from the following files:

Public Member Functions

Protected Attributes

Additional Inherited Members