Data Members

bool line_switch

Protected variable

true if the Path was created using the constructor Path(const Point& p0, const Point& p1), directly or indirectly. See Path Reference; Constructors and Setting Functions. Point p0; Point p1(1, 1); Point p2(2, 3); Path q0(p0, p1); cout << q0.get_line_switch(); -| 1 Path q1; q1 = q0; cout << q1.get_line_switch(); -| 1 Path q2 = p0.draw(p1); cout << q2.get_line_switch(); -| 1 Path q3("..", false, &p1, &p2, &p0, 0); cout << q3.get_line_switch(); -| 0 Fig. 109. Some Path functions only work on linear Paths, so it's necessary to be able to distinguish them from non-linear ones. The function is_linear() should be enough to ensure that all of these functions work, so I plan to make line_switch obsolete soon. However, at the moment, it's still needed. See Path Reference; Querying.

bool cycle_switch

Protected variable

true if the Path is cyclical, otherwise false.

bool on_free_store

Protected variable

true if the Path was dynamically allocated on the free store. Otherwise false. Set to true only in create_new<Path>(), which should be the only way Paths are ever dynamically allocated. See Path Reference; Constructors and Setting Functions.

bool do_output

Protected variable

Used in Picture::output(). Set to false if the Path isn't projectable using the arguments passed to Picture::output(). See Picture Reference; Outputting.

signed short fill_draw_value

Protected variable

Set in the drawing and filling functions, and used in Path::output(), to determine what MetaPost code to write to out_stream. See Path Reference; Drawing and Filling, and Path Reference; Outputting.

const Color* draw_color

Protected variable

Pointer to the Color used if the Path is drawn.

const Color* fill_color

Protected variable

Pointer to the Color used if the Path is filled.

string dashed

Protected variable

String written to out_stream for the "dash pattern" in a MetaPost draw or undraw command. If and only if dashed is not the empty string, "dashed <dash pattern>" is written to out_stream. Dash patterns have no meaning inside 3DLDF; dashed, if non-empty, is written unchanged to out_stream. I may change this in the future.

string pen

Protected variable

String written to out_stream for the pen to be used in a MetaPost draw, undraw, filldraw, or unfilldraw command. If and only if pen is not the empty string, "withpen <...>" is written to out_stream. Pens have no meaning inside 3DLDF; pen, if non-empty, is written unchanged to out_stream. I may change this in the future.

bool arrow

Protected variable

Indicates whether an arrow should be drawn when outputting a Path. Set to true on a Path created on the free store and put onto a Picture by drawarrow().

valarray<real> projective_extremes

Protected variable

Contains the maxima and minima of the x, y, and z-coordinates of the projections of Points on a Path using a particular Focus. Set in set_extremes() and used in Picture::output() for surface hiding.

vector<Point*> points

Protected variable

Pointers to the Points on the Path.

vector<string> connectors

Protected variable

The connectors between the Points on the Path. Connectors are simply strings in 3DLDF, they are written unchanged to out_stream.

const Color* help_color

Public static variable

Pointer to a const Color, which becomes the default for draw_help(). See Path Reference; Drawing and Filling. Please note that help_color is a pointer to a const Color, not a const pointer to a Color or a const pointer to a const Color! It's easy to get confused by the syntax for these types of pointers.1

string help_dash_pattern

Public static variable

The default dash pattern for draw_help().

bool do_help_lines

Public static variable

true if help lines should be output, otherwise false. If false, a call to draw_help() does not cause a copy of the Path to be created and put onto a Picture. See Path Reference; Drawing and Filling.