org.lwjgl.opengl

Class ARBPointParameters

java.lang.Object

org.lwjgl.opengl.ARBPointParameters

public class ARBPointParameters
extends java.lang.Object

Native bindings to the ARB_point_parameters extension.

This extension supports additional geometric characteristics of points. It can be used to render particles or tiny light sources, commonly referred to as "Light points".

The raster brightness of a point is a function of the point area, point color, point transparency, and the response of the display's electron gun and phosphor. The point area and the point transparency are derived from the point size, currently provided with the size parameter of PointSize.

The primary motivation is to allow the size of a point to be affected by distance attenuation. When distance attenuation has an effect, the final point size decreases as the distance of the point from the eye increases.

The secondary motivation is a mean to control the mapping from the point size to the raster point area and point transparency. This is done in order to increase the dynamic range of the raster brightness of points. In other words, the alpha component of a point may be decreased (and its transparency increased) as its area shrinks below a defined threshold.

Promoted to core in OpenGL 1.4.

Field Summary

Fields

Modifier and Type	Field and Description
static int	GL_POINT_DISTANCE_ATTENUATION_ARB Accepted by the pname parameter of PointParameterfvARB, and the pname of Get.
static int	GL_POINT_FADE_THRESHOLD_SIZE_ARB Accepted by the pname parameter of PointParameterfvARB, and the pname of Get.
static int	GL_POINT_SIZE_MAX_ARB Accepted by the pname parameter of PointParameterfvARB, and the pname of Get.
static int	GL_POINT_SIZE_MIN_ARB Accepted by the pname parameter of PointParameterfvARB, and the pname of Get.

Method Summary

Modifier and Type	Method and Description
static void	glPointParameterfARB(int pname, float param) Sets the float value of a pointer parameter.
static void	glPointParameterfvARB(int pname, float[] params) Array version of: PointParameterfvARB
static void	glPointParameterfvARB(int pname, java.nio.FloatBuffer params) Pointer version of PointParameterfARB.
static void	nglPointParameterfvARB(int pname, long params) Unsafe version of: PointParameterfvARB

Methods inherited from class java.lang.Object

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

Field Detail

GL_POINT_SIZE_MIN_ARB

public static final int GL_POINT_SIZE_MIN_ARB

Accepted by the pname parameter of PointParameterfvARB, and the pname of Get.

See Also:

Constant Field Values

GL_POINT_SIZE_MAX_ARB

public static final int GL_POINT_SIZE_MAX_ARB

Accepted by the pname parameter of PointParameterfvARB, and the pname of Get.

See Also:

Constant Field Values

GL_POINT_FADE_THRESHOLD_SIZE_ARB

public static final int GL_POINT_FADE_THRESHOLD_SIZE_ARB

Accepted by the pname parameter of PointParameterfvARB, and the pname of Get.

See Also:

Constant Field Values

GL_POINT_DISTANCE_ATTENUATION_ARB

public static final int GL_POINT_DISTANCE_ATTENUATION_ARB

Accepted by the pname parameter of PointParameterfvARB, and the pname of Get.

See Also:

Constant Field Values

Method Detail

glPointParameterfARB

public static void glPointParameterfARB(int pname,
                                        float param)

Sets the float value of a pointer parameter.

Parameters:

pname - the parameter to set. One of:

POINT_SIZE_MIN_ARB

POINT_SIZE_MAX_ARB

POINT_FADE_THRESHOLD_SIZE_ARB

param - the parameter value

nglPointParameterfvARB

public static void nglPointParameterfvARB(int pname,
                                          long params)

Unsafe version of: PointParameterfvARB

glPointParameterfvARB

public static void glPointParameterfvARB(int pname,
                                         java.nio.FloatBuffer params)

Pointer version of PointParameterfARB.

Parameters:

pname - the parameter to set. Must be:

POINT_DISTANCE_ATTENUATION_ARB

params - the parameter value

glPointParameterfvARB

public static void glPointParameterfvARB(int pname,
                                         float[] params)

Array version of: PointParameterfvARB