#include <c4d_baseobject.h>

Detailed Description

Represents a polygon that can be either a triangle or a quadrangle.

Public Member Functions
	CPolygon ()

	CPolygon (Int32 t_a, Int32 t_b, Int32 t_c)

	CPolygon (Int32 t_a, Int32 t_b, Int32 t_c, Int32 t_d)

Int32 &	operator[] (Int32 index) const

Bool	IsTriangle (void) const

Int32	Find (Int32 index) const

Int32	FindEdge (Int32 index1, Int32 index2) const

void	EdgePoints (Int32 edge, Int32 &p1, Int32 &p2) const

Int32 &	GetPoint (Int32 index) const

Public Attributes
Int32	a

Int32	b

Int32	c

Int32	d

Constructor & Destructor Documentation

◆ CPolygon() [1/3]

CPolygon ( )

Constructs a polygon by default.

◆ CPolygon() [2/3]

CPolygon	(	Int32	t_a,
		Int32	t_b,
		Int32	t_c
	)

Constructs a triangle.

Parameters

[in]	t_a	Index of the first point in the polygon.
[in]	t_b	Index of the second point in the polygon.
[in]	t_c	Index of the third point in the polygon.

◆ CPolygon() [3/3]

CPolygon	(	Int32	t_a,
		Int32	t_b,
		Int32	t_c,
		Int32	t_d
	)

Constructs a quadrangle.

Parameters

[in]	t_a	Index of the first point in the polygon.
[in]	t_b	Index of the second point in the polygon.
[in]	t_c	Index of the third point in the polygon.
[in]	t_d	Index of the fourth point in the polygon.

Member Function Documentation

◆ operator[]()

Int32& operator[] ( Int32 index ) const

Vertex index array operator.
Accesses the polygon's vertex indices through their polygon vertex numbers (0 - 3) instead of a, b, c, d.

Parameters

[in] index The vertex index (0 - 3) to retrieve in the polygon.

Returns: The vertex index.

◆ IsTriangle()

Bool IsTriangle ( void ) const

Checks if the polygon is a triangle.

Returns: true if the polygon is a triangle, otherwise false.

◆ Find()

Int32 Find ( Int32 index ) const

Checks if one of the polygon vertex indices is equal to index and returns the found polygon vertex number (0 - 3, equals a - d).

Parameters

[in] index The vertex index to check.

Returns: The matching polygon vertex number (0 - 3, equals a - d). NOTOK is returned if there is no match.

◆ FindEdge()

Int32 FindEdge	(	Int32	index1,
		Int32	index2
	)		const

Checks if the vertex indices index1 and index2 form an edge in the polygon. If so the polygon edge number is returned (0 - 3).

Parameters

[in]	index1	The vertex index of the first edge point.
[in]	index2	The vertex index of the second edge point.

Returns: The found polygon edge number (0 - 3), or NOTOK if there is no match.

◆ EdgePoints()

void EdgePoints	(	Int32	edge,
		Int32 &	p1,
		Int32 &	p2
	)		const

Gets the point indices for an edge index.

Parameters

[in]	edge	The edge index.
[out]	p1	Assigned the index of the first edge point.
[out]	p2	Assigned the index of the second edge point.

◆ GetPoint()

Int32& GetPoint ( Int32 index ) const

Gets the point with modulo for the number of points in the polygon.
If the polygon is a triangle it goes a, b, c, a, b , c etc thus point 3 will be point a again, but with a quad it goes a, b, c, d, a, b, c, d... so point 3 will be d.