class polyhedronFace

polyhedronFace - polygon representation used by the mpoly class.

Public Fields

triple n

the face's normal; computed by process

double d

distance from the origin; computed by process

mpoly* mp

the mpoly owning the face

int npts

the number of vertices in the face

int* indices

indices into mp->pts indicating which vertices are used by the face.

triple* narr

an array of normals, one per vertex; can be NULL, in which case n is used

double zinv

used by process

unsigned char noDisplay

1 if the face should not be displayed

float color[3]

RGB color of the face,

void* appearance

other appearance data

Public Methods

inline polyhedronFace(void)

constructor

inline ~polyhedronFace(void)

destructor

int process(mpoly* MP)

computes the plane equation (n, d, and zinv)

inline void setColor(const float* Color)

copies the color information from Color to color

Documentation

polyhedronFace - polygon representation used by the mpoly class. A polyhedronFace represents a single face of a polyhedron. It is an indexed representation: rather than storing the vertices themselves, the index of each vertex (in the mpoly's array of vertices) is stored. The indices should be ordered counter-clockwise when looking at the face from outside the mpoly. The vertices should be coplanar; don't count on anything if they're not.

For convenience, each face has several members associated with the face's appearance:

• color: an array of 3 floats for RGB color information
• appearance: a generic (void) pointer for other appearance: data (e.g. material properties)
• narr: a pointer to an array of surface normals; this may be NULL, indicating that the computed normal should be used, or it can point to an array of npts surface normals, one per vertex.

triple n

the face's normal; computed by process

double d

distance from the origin; computed by process

mpoly* mp

the mpoly owning the face

int npts

the number of vertices in the face

int* indices

indices into mp->pts indicating which vertices are used by the face. vertices should be ordered counter-clockwise when viewed from the outside of the polyhedron.

triple* narr

an array of normals, one per vertex; can be NULL, in which case n is used

double zinv

used by process

unsigned char noDisplay

1 if the face should not be displayed

float color[3]

RGB color of the face,

void* appearance

other appearance data

inline polyhedronFace(void)

constructor

inline ~polyhedronFace(void)

destructor

int process(mpoly* MP)

computes the plane equation (n, d, and zinv)

inline void setColor(const float* Color)

copies the color information from Color to color

This class has no child classes.

Friends:

mpoly
link

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