org.lwjgl.opengl

Class ARBPointSprite

java.lang.Object

org.lwjgl.opengl.ARBPointSprite

public final class ARBPointSprite
extends java.lang.Object

Native bindings to the ARB_point_sprite extension.

Applications such as particle systems have tended to use OpenGL quads rather than points to render their geometry, since they would like to use a custom-drawn texture for each particle, rather than the traditional OpenGL round antialiased points, and each fragment in a point has the same texture coordinates as every other fragment.

Unfortunately, specifying the geometry for these quads can be expensive, since it quadruples the amount of geometry required, and may also require the application to do extra processing to compute the location of each vertex.

The purpose of this extension is to allow such applications to use points rather than quads. When POINT_SPRITE_ARB is enabled, the state of point antialiasing is ignored. For each texture unit, the app can then specify whether to replace the existing texture coordinates with point sprite texture coordinates, which are interpolated across the point.

Promoted to core in OpenGL 2.0.

Field Summary

Fields

Modifier and Type	Field and Description
static int	GL_COORD_REPLACE_ARB When the target parameter of TexEnvf, TexEnvfv, TexEnvi, TexEnviv, GetTexEnvfv, or GetTexEnviv is POINT_SPRITE_ARB, then the value of pname may be.
static int	GL_POINT_SPRITE_ARB Accepted by the cap parameter of Enable, Disable, and IsEnabled, by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev, and by the target parameter of TexEnvi, TexEnviv, TexEnvf, TexEnvfv, GetTexEnviv, and GetTexEnvfv.

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

GL_POINT_SPRITE_ARB

public static final int GL_POINT_SPRITE_ARB

Accepted by the cap parameter of Enable, Disable, and IsEnabled, by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev, and by the target parameter of TexEnvi, TexEnviv, TexEnvf, TexEnvfv, GetTexEnviv, and GetTexEnvfv.

See Also:

Constant Field Values

GL_COORD_REPLACE_ARB

public static final int GL_COORD_REPLACE_ARB

When the target parameter of TexEnvf, TexEnvfv, TexEnvi, TexEnviv, GetTexEnvfv, or GetTexEnviv is POINT_SPRITE_ARB, then the value of pname may be.

See Also:

Constant Field Values