Panda3D
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Encapsulates creation of a series of connected or disconnected line segments or points, for drawing paths or rays. More...
#include "lineSegs.h"
Classes | |
class | Point |
Public Member Functions | |
LineSegs (const string &name="lines") | |
Constructs a LineSegs object, which can be used to create any number of disconnected lines or points of various thicknesses and colors through the visible scene. | |
GeomNode * | create (bool dynamic=false) |
Creates a new GeomNode that will render the series of line segments and points described via calls to move_to() and draw_to(). | |
GeomNode * | create (GeomNode *previous, bool dynamic=false) |
Appends to an existing GeomNode a new Geom that will render the series of line segments and points described via calls to move_to() and draw_to(). | |
void | draw_to (PN_stdfloat x, PN_stdfloat y, PN_stdfloat z) |
Draws a line segment from the pen's last position (the last call to move_to or draw_to) to the indicated point. | |
void | draw_to (const LVecBase3 &v) |
Draws a line segment from the pen's last position (the last call to move_to or draw_to) to the indicated point. | |
const LVertex & | get_current_position () |
Returns the pen's current position. | |
int | get_num_vertices () const |
Returns the total number of line segment and point vertices generated by the last call to create(). | |
LVertex | get_vertex (int n) const |
Returns the nth point or vertex of the line segment sequence generated by the last call to create(). | |
LColor | get_vertex_color (int vertex) const |
Returns the color of the nth point or vertex. | |
bool | is_empty () |
Returns true if move_to() or draw_to() have not been called since the last reset() or create(), false otherwise. | |
MAKE_SEQ (get_vertices, get_num_vertices, get_vertex) | |
MAKE_SEQ (get_vertex_colors, get_num_vertices, get_vertex_color) | |
void | move_to (const LVecBase3 &v) |
Moves the pen to the given point without drawing a line. | |
void | move_to (PN_stdfloat x, PN_stdfloat y, PN_stdfloat z) |
Moves the pen to the given point without drawing a line. | |
void | reset () |
Removes any lines in progress and resets to the initial empty state. | |
void | set_color (PN_stdfloat r, PN_stdfloat g, PN_stdfloat b, PN_stdfloat a=1.0f) |
Establishes the color that will be assigned to all vertices created by future calls to move_to() and draw_to(). | |
void | set_color (const LColor &color) |
Establishes the color that will be assigned to all vertices created by future calls to move_to() and draw_to(). | |
void | set_thickness (PN_stdfloat thick) |
Establishes the line thickness or point size in pixels that will be assigned to all lines and points created by future calls to create(). | |
void | set_vertex (int vertex, PN_stdfloat x, PN_stdfloat y, PN_stdfloat z) |
Moves the nth point or vertex of the line segment sequence generated by the last call to create(). | |
void | set_vertex (int n, const LVertex &vert) |
Moves the nth point or vertex of the line segment sequence generated by the last call to create(). | |
void | set_vertex_color (int vertex, const LColor &c) |
Changes the vertex color of the nth point or vertex. | |
void | set_vertex_color (int vertex, PN_stdfloat r, PN_stdfloat g, PN_stdfloat b, PN_stdfloat a=1.0f) |
Changes the vertex color of the nth point or vertex. |
Encapsulates creation of a series of connected or disconnected line segments or points, for drawing paths or rays.
This class doesn't attempt to be the smartest it could possibly be; it's intended primarily as a visualization and editing tool.
Definition at line 36 of file lineSegs.h.
LineSegs::LineSegs | ( | const string & | name = "lines" | ) |
Constructs a LineSegs object, which can be used to create any number of disconnected lines or points of various thicknesses and colors through the visible scene.
After creating the object, call move_to() and draw_to() repeatedly to describe the path, then call create() to create a GeomNode which will render the described path.
Definition at line 36 of file lineSegs.cxx.
GeomNode * LineSegs::create | ( | bool | dynamic = false | ) | [inline] |
Creates a new GeomNode that will render the series of line segments and points described via calls to move_to() and draw_to().
The lines and points are created with the color and thickness established by calls to set_color() and set_thick().
If dynamic is true, the line segments will be created with the dynamic Geom setting, optimizing them for runtime vertex animation.
Definition at line 137 of file lineSegs.I.
Referenced by PGEntry::setup_minimal(), and PathFind::trace_path().
Appends to an existing GeomNode a new Geom that will render the series of line segments and points described via calls to move_to() and draw_to().
The lines and points are created with the color and thickness established by calls to set_color() and set_thick().
If dynamic is true, the line segments will be created with the dynamic Geom setting, optimizing them for runtime vertex animation.
Definition at line 210 of file lineSegs.cxx.
References GeomVertexWriter::add_data3(), GeomVertexWriter::add_data4(), GeomNode::add_geom(), GeomVertexFormat::get_v3cp(), and reset().
void LineSegs::draw_to | ( | PN_stdfloat | x, |
PN_stdfloat | y, | ||
PN_stdfloat | z | ||
) | [inline] |
Draws a line segment from the pen's last position (the last call to move_to or draw_to) to the indicated point.
move_to() and draw_to() only update tables; the actual drawing is performed when create() is called.
Definition at line 119 of file lineSegs.I.
Referenced by PGEntry::setup_minimal(), and PathFind::trace_path().
void LineSegs::draw_to | ( | const LVecBase3 & | v | ) |
const LVertex & LineSegs::get_current_position | ( | ) |
Returns the pen's current position.
The next call to draw_to() will draw a line segment from this point.
Definition at line 186 of file lineSegs.cxx.
References move_to().
int LineSegs::get_num_vertices | ( | ) | const [inline] |
Returns the total number of line segment and point vertices generated by the last call to create().
The positions of these vertices may be read and adjusted through get_vertex() and set_vertex().
Definition at line 151 of file lineSegs.I.
LVertex LineSegs::get_vertex | ( | int | n | ) | const |
Returns the nth point or vertex of the line segment sequence generated by the last call to create().
The first move_to() generates vertex 0; subsequent move_to() and draw_to() calls generate consecutively higher vertex numbers.
Definition at line 128 of file lineSegs.cxx.
References GeomVertexReader::get_data3(), GeomVertexReader::set_row_unsafe(), and LPoint3f::zero().
LColor LineSegs::get_vertex_color | ( | int | vertex | ) | const |
Returns the color of the nth point or vertex.
Definition at line 158 of file lineSegs.cxx.
References GeomVertexReader::get_data4(), GeomVertexReader::set_row_unsafe(), and LVecBase4f::zero().
bool LineSegs::is_empty | ( | ) |
void LineSegs::move_to | ( | PN_stdfloat | x, |
PN_stdfloat | y, | ||
PN_stdfloat | z | ||
) | [inline] |
Moves the pen to the given point without drawing a line.
When followed by draw_to(), this marks the first point of a line segment; when followed by move_to() or create(), this creates a single point.
Definition at line 105 of file lineSegs.I.
Referenced by draw_to(), get_current_position(), PGEntry::setup_minimal(), and PathFind::trace_path().
void LineSegs::move_to | ( | const LVecBase3 & | v | ) |
Moves the pen to the given point without drawing a line.
When followed by draw_to(), this marks the first point of a line segment; when followed by move_to() or create(), this creates a single point.
Definition at line 72 of file lineSegs.cxx.
void LineSegs::reset | ( | ) |
Removes any lines in progress and resets to the initial empty state.
Definition at line 58 of file lineSegs.cxx.
Referenced by create().
void LineSegs::set_color | ( | PN_stdfloat | r, |
PN_stdfloat | g, | ||
PN_stdfloat | b, | ||
PN_stdfloat | a = 1.0f |
||
) | [inline] |
Establishes the color that will be assigned to all vertices created by future calls to move_to() and draw_to().
Definition at line 68 of file lineSegs.I.
Referenced by PGEntry::setup_minimal().
void LineSegs::set_color | ( | const LColor & | color | ) | [inline] |
Establishes the color that will be assigned to all vertices created by future calls to move_to() and draw_to().
Definition at line 80 of file lineSegs.I.
void LineSegs::set_thickness | ( | PN_stdfloat | thick | ) | [inline] |
Establishes the line thickness or point size in pixels that will be assigned to all lines and points created by future calls to create().
Definition at line 92 of file lineSegs.I.
void LineSegs::set_vertex | ( | int | n, |
const LVertex & | vert | ||
) |
Moves the nth point or vertex of the line segment sequence generated by the last call to create().
The first move_to() generates vertex 0; subsequent move_to() and draw_to() calls generate consecutively higher vertex numbers.
Definition at line 145 of file lineSegs.cxx.
References GeomVertexWriter::set_data3(), and GeomVertexWriter::set_row_unsafe().
Referenced by set_vertex().
void LineSegs::set_vertex | ( | int | n, |
PN_stdfloat | x, | ||
PN_stdfloat | y, | ||
PN_stdfloat | z | ||
) | [inline] |
Moves the nth point or vertex of the line segment sequence generated by the last call to create().
The first move_to() generates vertex 0; subsequent move_to() and draw_to() calls generate consecutively higher vertex numbers.
Definition at line 168 of file lineSegs.I.
References set_vertex().
void LineSegs::set_vertex_color | ( | int | n, |
PN_stdfloat | r, | ||
PN_stdfloat | g, | ||
PN_stdfloat | b, | ||
PN_stdfloat | a = 1.0f |
||
) | [inline] |
Changes the vertex color of the nth point or vertex.
See set_vertex().
Definition at line 179 of file lineSegs.I.
References set_vertex_color().
void LineSegs::set_vertex_color | ( | int | n, |
const LColor & | c | ||
) |
Changes the vertex color of the nth point or vertex.
See set_vertex().
Definition at line 172 of file lineSegs.cxx.
References GeomVertexWriter::set_data4(), and GeomVertexWriter::set_row_unsafe().
Referenced by set_vertex_color().