org.lwjgl.opengl

Class NVPointSprite

java.lang.Object

org.lwjgl.opengl.NVPointSprite

public class NVPointSprite
extends java.lang.Object

Native bindings to the NV_point_sprite extension.

Applications such as particle systems usually must 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 quite expensive, since it quadruples the amount of geometry required, and it may also require the application to do extra processing to compute the location of each vertex.

The goal of this extension is to allow such apps to use points rather than quads. When POINT_SPRITE_NV 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. Finally, the app can set a global parameter for the way to generate the R coordinate for point sprites; the R coordinate can either be zero, the input S coordinate, or the input R coordinate. This allows applications to use a 3D texture to represent a point sprite that goes through an animation, with filtering between frames, for example.

Requires EXT_point_parameters.

Field Summary

Fields

Modifier and Type	Field and Description
static int	GL_COORD_REPLACE_NV When the target parameter of TexEnvf, TexEnvfv, TexEnvi, TexEnviv, GetTexEnvfv, or GetTexEnviv is POINT_SPRITE_NV, then the value of pname may be.
static int	GL_POINT_SPRITE_NV 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.
static int	GL_POINT_SPRITE_R_MODE_NV Accepted by the pname parameter of PointParameteriNV, PointParameterfEXT, PointParameterivNV, PointParameterfvEXT, GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev.

Method Summary

Modifier and Type	Method and Description
static void	glPointParameteriNV(int pname, int param)
static void	glPointParameterivNV(int pname, int[] params) Array version of: PointParameterivNV
static void	glPointParameterivNV(int pname, java.nio.IntBuffer params)
static void	nglPointParameterivNV(int pname, long params)

Methods inherited from class java.lang.Object

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

Field Detail

GL_POINT_SPRITE_NV

public static final int GL_POINT_SPRITE_NV

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_NV

public static final int GL_COORD_REPLACE_NV

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

See Also:

Constant Field Values

GL_POINT_SPRITE_R_MODE_NV

public static final int GL_POINT_SPRITE_R_MODE_NV

Accepted by the pname parameter of PointParameteriNV, PointParameterfEXT, PointParameterivNV, PointParameterfvEXT, GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev.

See Also:

Constant Field Values

Method Detail

glPointParameteriNV

public static void glPointParameteriNV(int pname,
                                       int param)

nglPointParameterivNV

public static void nglPointParameterivNV(int pname,
                                         long params)

glPointParameterivNV

public static void glPointParameterivNV(int pname,
                                        java.nio.IntBuffer params)

glPointParameterivNV

public static void glPointParameterivNV(int pname,
                                        int[] params)

Array version of: PointParameterivNV