org.jogamp.glg2d.impl.gl2

Class FastLineVisitor

java.lang.Object

org.jogamp.glg2d.impl.SimplePathVisitor

org.jogamp.glg2d.impl.gl2.FastLineVisitor

All Implemented Interfaces:

PathVisitor

public class FastLineVisitor
extends SimplePathVisitor

Draws a line using the native GL implementation of a line. This is only appropriate if the width of the line is less than a certain number of pixels (not coordinate units) so that the user cannot see that the join and endpoints are different. See isValid(BasicStroke) for a set of useful criteria.

Field Summary

Fields inherited from class org.jogamp.glg2d.impl.SimplePathVisitor

CURVE_STEPS

Constructor Summary

Constructors

Constructor and Description
FastLineVisitor()

Method Summary

Methods

Modifier and Type	Method and Description
void	beginPoly(int windingRule) Starts the polygon or polyline.
void	closeLine() Specifies that the preceding subpath should be closed by appending a line segment back to the point corresponding to the most recent call to #moveTo(float[]).
void	endPoly() Signifies that the polygon or polyline has ended.
boolean	isValid(BasicStroke stroke) Returns true if this class can reasonably render the line.
void	lineTo(float[] vertex) Specifies the end point of a line to be drawn from the most recently specified point.
void	moveTo(float[] vertex) Specifies the starting location for a new subpath.
void	setGLContext(GL context) Sets the GL context to be used for the next drawing session.
void	setStroke(BasicStroke stroke) Sets the stroke to be used when drawing a path.

Methods inherited from class org.jogamp.glg2d.impl.SimplePathVisitor

cubicTo, getNumCurveSteps, quadTo, setNumCurveSteps

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FastLineVisitor

public FastLineVisitor()

Method Detail

setGLContext

public void setGLContext(GL context)

Description copied from interface: PathVisitor

Sets the GL context to be used for the next drawing session.

Parameters:

context - The GL context

setStroke

public void setStroke(BasicStroke stroke)

Description copied from interface: PathVisitor

Sets the stroke to be used when drawing a path. It's not needed for visitors that fill.

isValid

public boolean isValid(BasicStroke stroke)

Returns true if this class can reasonably render the line. This takes into account whether or not the transform will blow the line width out of scale and it obvious that we aren't drawing correct corners and line endings.

Note: This must be called before setStroke(BasicStroke). If this returns false then this renderer should not be used.

moveTo

public void moveTo(float[] vertex)

Description copied from interface: PathVisitor

Specifies the starting location for a new subpath.

Parameters:

vertex - An array where the first two values are the x,y coordinates of the start of the subpath.

lineTo

public void lineTo(float[] vertex)

Description copied from interface: PathVisitor

Specifies the end point of a line to be drawn from the most recently specified point.

Parameters:

vertex - An array where the first two values are the x,y coordinates of the next point in the subpath.

closeLine

public void closeLine()

Description copied from interface: PathVisitor

Specifies that the preceding subpath should be closed by appending a line segment back to the point corresponding to the most recent call to #moveTo(float[]).

beginPoly

public void beginPoly(int windingRule)

Description copied from interface: PathVisitor

Starts the polygon or polyline.

Parameters:

windingRule - The winding rule for the polygon.

endPoly

public void endPoly()

Description copied from interface: PathVisitor

Signifies that the polygon or polyline has ended. All cleanup should occur and there will be no more calls for this shape.