Package org.lwjgl.opengl

Class 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