lib-server.TraceLines.Trace Class Reference

Class which handles the creation and updating of the trace lines. More...

Public Member Functions
def	__init__
	Default constructor. More...
def	calc_transform_mat
	Calculates the transformation matrix of a line segment node in the scene graph. More...
def	clear
	Clears the traces and starts drawing again from the current position. More...
def	update
	Update function that updates the point list whenever the time_offset was reached. More...

Public Attributes
	num_lines
	The number of line segments that are used. More...
	distance_trigger
	After this distance a new line segment is created. More...
	lines
	A list of scene graph nodes where each respresents a line segment. More...
	transform_node
	A transform node that is the parent of all line segments. More...
	crrnt_idx
	The index of the current point in the list of lines. More...
	crrnt_point
	The end point of the last drawn line segment that is used as start point for the next line segment. More...

Detailed Description

Class which handles the creation and updating of the trace lines.

Is used by Navigation instances to draw the trace of their movement.

Constructor & Destructor Documentation

def lib-server.TraceLines.Trace.__init__	(		self,
			PARENT_NODE,
			ID,
			NUM_LINES,
			LINE_DISTANCE,
			INITIAL_MAT,
			TRACE_MATERIAL
	)

Default constructor.

Parameters

PARENT_NODE	A node in the scene graph to which the line segments are appended.
ID	A numerical ID that is appended to the scene graph name to separate the line segments of multiple instances of this class.
NUM_LINES	The number of line segments to be used.
LINE_DISTANCE	The overall distance of all line segments together. Determines how long the trace lines are kept before they are overwritten.
INITIAL_MAT	This matrix is used as initial position of all line segments.
TRACE_MATERIAL	The material to be used to display the trace.

Member Function Documentation

def lib-server.TraceLines.Trace.calc_transform_mat	(		self,
			START_VEC,
			END_VEC
	)

Calculates the transformation matrix of a line segment node in the scene graph.

def lib-server.TraceLines.Trace.clear	(		self,
			CURRENT_MAT
	)

Clears the traces and starts drawing again from the current position.

def lib-server.TraceLines.Trace.update	(		self,
			ABS_MAT
	)

Update function that updates the point list whenever the time_offset was reached.

Member Data Documentation

lib-server.TraceLines.Trace.crrnt_idx

The index of the current point in the list of lines.

lib-server.TraceLines.Trace.crrnt_point

The end point of the last drawn line segment that is used as start point for the next line segment.

It is initialized with the translation of the INITIAL_MATRIX parameter.

lib-server.TraceLines.Trace.distance_trigger

After this distance a new line segment is created.

This value is calculated with the given parameters and determines the resolution the trace line.

lib-server.TraceLines.Trace.lines

A list of scene graph nodes where each respresents a line segment.

lib-server.TraceLines.Trace.num_lines

The number of line segments that are used.

lib-server.TraceLines.Trace.transform_node

A transform node that is the parent of all line segments.

It groups the line segments in the scene graph as the given ID is added to it's name and therefore allows multiple instances of this class.

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The documentation for this class was generated from the following file:

• lib-server/TraceLines.py