ca.blarg.gdx.graphics

Class AlphaTestCameraGroupStrategy

java.lang.Object

ca.blarg.gdx.graphics.AlphaTestCameraGroupStrategy

All Implemented Interfaces:

com.badlogic.gdx.graphics.g3d.decals.GroupStrategy, com.badlogic.gdx.utils.Disposable

public class AlphaTestCameraGroupStrategy
extends Object
implements com.badlogic.gdx.graphics.g3d.decals.GroupStrategy, com.badlogic.gdx.utils.Disposable

Note:
This is almost exactly the same as CameraGroupStrategy except that this version requires shader support and it's shader has been slightly modified to perform a simple alpha-test in the fragment shader.

Minimalistic grouping strategy that splits decals into opaque and transparent ones enabling and disabling blending as needed. Opaque decals are rendered first (decal color is ignored in opacity check).
Use this strategy only if the vast majority of your decals are opaque and the few transparent ones are unlikely to overlap.

Can produce invisible artifacts when transparent decals overlap each other.

Needs to be explicitely disposed as it might allocate a ShaderProgram when GLSL 2.0 is used.

States (* = any, EV = entry value - same as value before flush):

	expects	exits on
glDepthMask	true	EV
GL_DEPTH_TEST	enabled	EV
glDepthFunc	GL_LESS | GL_LEQUAL	EV
GL_BLEND	disabled	EV | disabled
glBlendFunc	*	*
GL_TEXTURE_2D	*	disabled

Constructor Summary

Constructors

Constructor and Description
AlphaTestCameraGroupStrategy(com.badlogic.gdx.graphics.Camera camera)
AlphaTestCameraGroupStrategy(com.badlogic.gdx.graphics.Camera camera, Comparator<com.badlogic.gdx.graphics.g3d.decals.Decal> sorter)

Method Summary

Modifier and Type	Method and Description
void	afterGroup(int group)
void	afterGroups()
void	beforeGroup(int group, com.badlogic.gdx.utils.Array<com.badlogic.gdx.graphics.g3d.decals.Decal> contents)
void	beforeGroups()
int	decideGroup(com.badlogic.gdx.graphics.g3d.decals.Decal decal)
void	dispose()
com.badlogic.gdx.graphics.Camera	getCamera()
com.badlogic.gdx.graphics.glutils.ShaderProgram	getGroupShader(int group)
void	setCamera(com.badlogic.gdx.graphics.Camera camera)

Methods inherited from class java.lang.Object

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

Constructor Detail

AlphaTestCameraGroupStrategy

public AlphaTestCameraGroupStrategy(com.badlogic.gdx.graphics.Camera camera)

AlphaTestCameraGroupStrategy

public AlphaTestCameraGroupStrategy(com.badlogic.gdx.graphics.Camera camera,
                                    Comparator<com.badlogic.gdx.graphics.g3d.decals.Decal> sorter)

Method Detail

setCamera

public void setCamera(com.badlogic.gdx.graphics.Camera camera)

getCamera

public com.badlogic.gdx.graphics.Camera getCamera()

decideGroup

public int decideGroup(com.badlogic.gdx.graphics.g3d.decals.Decal decal)

Specified by:

decideGroup in interface com.badlogic.gdx.graphics.g3d.decals.GroupStrategy

beforeGroup

public void beforeGroup(int group,
                        com.badlogic.gdx.utils.Array<com.badlogic.gdx.graphics.g3d.decals.Decal> contents)

Specified by:

beforeGroup in interface com.badlogic.gdx.graphics.g3d.decals.GroupStrategy

afterGroup

public void afterGroup(int group)

Specified by:

afterGroup in interface com.badlogic.gdx.graphics.g3d.decals.GroupStrategy

beforeGroups

public void beforeGroups()

Specified by:

beforeGroups in interface com.badlogic.gdx.graphics.g3d.decals.GroupStrategy

afterGroups

public void afterGroups()

Specified by:

afterGroups in interface com.badlogic.gdx.graphics.g3d.decals.GroupStrategy

getGroupShader

public com.badlogic.gdx.graphics.glutils.ShaderProgram getGroupShader(int group)

Specified by:

getGroupShader in interface com.badlogic.gdx.graphics.g3d.decals.GroupStrategy

dispose

public void dispose()

Specified by:

dispose in interface com.badlogic.gdx.utils.Disposable