MGDrawParam クラス

Defines parameters to draw MGObject, maily to approximate by lines and facets. [詳解]

公開メンバ関数
	MGDrawParam (double curve_tolerance=-1., double surface_tolerance=-1., double maximum_edge_length=-1., double span_length_wire=20, int line_desity_wire_face=1)
	MGDrawParam (const MGObject &obj, double span_length_wire=20)
	Construct from a object(box) data and the span length to draw object. [詳解]
	MGDrawParam (const MGContext &contx, double span_length_wire=20)
	Constructor. [詳解]
	MGDrawParam (const mgTLInputParam &tlpara)
	Conversion constructor. [詳解]
double	span_length_wire () const
int	line_desity_wire_face () const
double	curve_tolerance_tess () const
double	surface_tolerance_tess () const
double	maximum_edge_length_tess () const
void	set_line_density (int line_density=1)
void	set_span_length (double span_length)
void	set_maximum_edge_length_tess (double maximum_edge_length)

フレンド
MG_DLL_DECLR friend std::ostream &	operator<< (std::ostream &out, const MGDrawParam &para)
MG_DLL_DECLR friend MGOfstream &	operator<< (MGOfstream &buf, const MGDrawParam &para)
MG_DLL_DECLR friend MGIfstream &	operator>> (MGIfstream &buf, MGDrawParam &para)

詳解

Defines parameters to draw MGObject, maily to approximate by lines and facets.

1. To approximate the objects to draw in wire mode. m_span_length_wire and m_line_desity_wire_face are used for the wire mode.
2. To approoximate the objects(faces or surfaces) to draw in shding mode. m_curve_tolerance, m_surface_tolerance, and m_maximum_edge_length are used for the shading mode.

(1) m_span_length_wire: Used for the approximation of a curve by a polyline. m_span_length_wire is the maximum length of the one line segment of the polyline. (2) m_line_desity_wire_face: Used for the approximation of a surface by polylines. All of the curves(boundary or inner lines) are approximated by m_span_length_wire. And m_line_desity_wire_face indicates how many wires be drawn for the inner lines of the wire representation of the face. (3) m_curve_tolerance: The maximum deviation from a curve allowed for the tessellaiton of a surface. The length of the one line segment of this approximation is limitted by m_maximum_edge_length. (4) m_surface_tolerance: The maximum deviation allowed of a traiangle from surfaces forn the tessellation. (5) m_maximum_edge_length: The maximum length of a triangle of the tessellation.

The minimum parameter to construct MGDrawParam object is m_line_desity_wire_face. All of the other parameters can be derived from objects to draw and m_line_desity_wire_face.

構築子と解体子

MGDrawParam::MGDrawParam	(	double	curve_tolerance = -1.,
		double	surface_tolerance = -1.,
		double	maximum_edge_length = -1.,
		double	span_length_wire = 20,
		int	line_desity_wire_face = 1
	)

引数

curve_tolerance	Maximum deviation allowed to approximate curves.
surface_tolerance	Maximum deviation allowed to approximate surfaces.
maximum_edge_length	Maximum edge length for the tessellation.
span_length_wire	length of a line segment to approximate curves.
line_desity_wire_face	Indicates how many wires be drawn for the inner lines of the wire representation of the face.

MGDrawParam::MGDrawParam	(	const MGObject &	obj,
		double	span_length_wire = 20
	)

Construct from a object(box) data and the span length to draw object.

引数

obj	Target object to get box.
span_length_wire	span length.

MGDrawParam::MGDrawParam	(	const MGContext &	contx,
		double	span_length_wire = 20
	)

Constructor.

引数

contx	Context to get from.
span_length_wire	span length.

MGDrawParam::MGDrawParam

(

const mgTLInputParam &

tlpara

)

Conversion constructor.

関数詳解

double MGDrawParam::curve_tolerance_tess ( ) const

inline

int MGDrawParam::line_desity_wire_face ( ) const

inline

double MGDrawParam::maximum_edge_length_tess ( ) const

inline

void MGDrawParam::set_line_density ( int  line_density = 1 )

inline

void MGDrawParam::set_maximum_edge_length_tess ( double  maximum_edge_length )

inline

void MGDrawParam::set_span_length ( double  span_length )

inline

double MGDrawParam::span_length_wire ( ) const

inline

double MGDrawParam::surface_tolerance_tess ( ) const

inline

フレンドと関連関数の詳解

MG_DLL_DECLR friend std::ostream& operator<< ( std::ostream &  out, const MGDrawParam &  para  )

friend

MG_DLL_DECLR friend MGOfstream& operator<< ( MGOfstream &  buf, const MGDrawParam &  para  )

friend

MG_DLL_DECLR friend MGIfstream& operator>> ( MGIfstream &  buf, MGDrawParam &  para  )

friend

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このクラス詳解は次のファイルから抽出されました:

• mg/drawParam.h