org.lwjgl.opengles.EXTPolygonOffsetClamp Maven / Gradle / Ivy
Show all versions of lwjgl-opengles Show documentation
/*
* Copyright LWJGL. All rights reserved.
* License terms: https://www.lwjgl.org/license
* MACHINE GENERATED FILE, DO NOT EDIT
*/
package org.lwjgl.opengles;
import org.lwjgl.system.*;
/**
* Native bindings to the EXT_polygon_offset_clamp extension.
*
* This extension adds a new parameter to the polygon offset function that clamps the calculated offset to a minimum or maximum value. The clamping
* functionality is useful when polygons are nearly parallel to the view direction because their high slopes can result in arbitrarily large polygon
* offsets. In the particular case of shadow mapping, the lack of clamping can produce the appearance of unwanted holes when the shadow casting polygons
* are offset beyond the shadow receiving polygons, and this problem can be alleviated by enforcing a maximum offset value.
*/
public class EXTPolygonOffsetClamp {
static { GLES.initialize(); }
/** Accepted by the {@code pname} parameters of GetBooleanv, GetIntegerv, GetInteger64v, GetFloatv, and GetDoublev. */
public static final int GL_POLYGON_OFFSET_CLAMP_EXT = 0x8E1B;
protected EXTPolygonOffsetClamp() {
throw new UnsupportedOperationException();
}
// --- [ glPolygonOffsetClampEXT ] ---
/**
* The depth values of all fragments generated by the rasterization of a polygon may be offset by a single value that is computed for that polygon. The
* function that determines this value is specified with this command.
*
* {@code factor} scales the maximum depth slope of the polygon, and {@code units} scales an implementation-dependent constant that relates to the usable
* resolution of the depth buffer. The resulting values are summed to produce the polygon offset value, which may then be clamped to a minimum or maximum
* value specified by {@code clamp}. The values {@code factor}, {@code units}, and {@code clamp} may each be positive, negative, or zero. Calling the
* command {@link GLES20#glPolygonOffset PolygonOffset} is equivalent to calling the command PolygonOffsetClampEXT with {@code clamp} equal to zero.
*
* @param factor scales the maximum depth slope of the polygon
* @param units scales an implementation-dependent constant that relates to the usable resolution of the depth buffer
* @param clamp the minimum or maximum clamp value
*/
public static native void glPolygonOffsetClampEXT(@NativeType("GLfloat") float factor, @NativeType("GLfloat") float units, @NativeType("GLfloat") float clamp);
}