uk.ac.starlink.ttools.plot2.layer

Class SkyTileRenderer

java.lang.Object

uk.ac.starlink.ttools.plot2.layer.SkyTileRenderer

public abstract class SkyTileRenderer
extends Object

Defines the strategy for rendering HEALPix tiles to a graphics context.

Since:

16 Sep 2016

Author:

Mark Taylor

Constructor Summary

Constructors

Constructor and Description
SkyTileRenderer()

Method Summary

Modifier and Type	Method and Description
static SkyTileRenderer	createRenderer(SkySurface surface, Rotation rotation, int viewLevel, double binFactor) Returns a SkyTileRenderer suitable for use on a given sky surface.
abstract void	extendAuxRange(Ranger ranger, BinList.Result binResult) Modifies the range of aux values found within a given surface.
static void	paintBins(Graphics g, BinList.Result binResult, double binFactor, SkySurface surface, SkyPixer skyPixer, Shader shader, Scaler scaler) Given a prepared data structure, paints the results it represents onto a graphics context appropriate for this drawing.
abstract void	renderBins(Graphics g, BinList.Result binResult, Shader shader, Scaler scaler) Performs the rendering of a prepared bin list on a graphics surface.

Methods inherited from class java.lang.Object

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

Constructor Detail

SkyTileRenderer

public SkyTileRenderer()

Method Detail

extendAuxRange

public abstract void extendAuxRange(Ranger ranger,
                                    BinList.Result binResult)

Modifies the range of aux values found within a given surface.

Parameters:

ranger - range object to be modified

binResult - tile bin contents

renderBins

public abstract void renderBins(Graphics g,
                                BinList.Result binResult,
                                Shader shader,
                                Scaler scaler)

Performs the rendering of a prepared bin list on a graphics surface.

Parameters:

g - graphics context

binResult - histogram containing sky pixel values

shader - colour shading

scaler - value scaling

createRenderer

public static SkyTileRenderer createRenderer(SkySurface surface,
                                             Rotation rotation,
                                             int viewLevel,
                                             double binFactor)

Returns a SkyTileRenderer suitable for use on a given sky surface.

Parameters:

surface - sky surface

rotation - view rotation state

viewLevel - HEALPix level for view

binFactor - factor by which all bin values should be multiplied

Returns:

tile renderer

paintBins

public static void paintBins(Graphics g,
                             BinList.Result binResult,
                             double binFactor,
                             SkySurface surface,
                             SkyPixer skyPixer,
                             Shader shader,
                             Scaler scaler)

Given a prepared data structure, paints the results it represents onto a graphics context appropriate for this drawing.

Parameters:

g - graphics context

binResult - histogram containing sky pixel values

binFactor - factor by which all bin values must be multiplied

surface - plot surface

skyPixer - maps sky positions to HEALPix indices

shader - colour shading

scaler - value scaling