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package jogamp.opengl.glu.nurbs;
/*
** License Applicability. Except to the extent portions of this file are
** made subject to an alternative license as permitted in the SGI Free
** Software License B, Version 2.0 (the "License"), the contents of this
** file are subject only to the provisions of the License. You may not use
** this file except in compliance with the License. You may obtain a copy
** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
**
** http://oss.sgi.com/projects/FreeB
**
** Note that, as provided in the License, the Software is distributed on an
** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
**
** Original Code. The Original Code is: OpenGL Sample Implementation,
** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
** Copyright in any portions created by third parties is as indicated
** elsewhere herein. All Rights Reserved.
**
** Additional Notice Provisions: The application programming interfaces
** established by SGI in conjunction with the Original Code are The
** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
** Window System(R) (Version 1.3), released October 19, 1998. This software
** was created using the OpenGL(R) version 1.2.1 Sample Implementation
** published by SGI, but has not been independently verified as being
** compliant with the OpenGL(R) version 1.2.1 Specification.
*/
/**
* Trimming arc
* @author Tomas Hrasky
*
*/
public class Arc {
/**
* Corresponding picewise-linear arc
*/
public PwlArc pwlArc;
/**
* Arc type
*/
private long type;
/**
* Arc link in linked list
*/
public Arc link;
/**
* Previous arc
*/
Arc prev;
/**
* Next arc
*/
Arc next;
/**
* Corresponding berizer type arc
*/
private BezierArc bezierArc;
/**
* Makes new arc at specified side
*
* @param side
* which side doeas this arc form
*/
public Arc(int side) {
bezierArc = null;
pwlArc = null;
type = 0;
setside(side);
// nuid=_nuid
}
/**
* Sets side the arc is at
*
* @param side
* arc side
*/
private void setside(int side) {
// DONE
clearside();
type |= side << 8;
}
/**
* Unsets side
*/
private void clearside() {
// DONE
type &= ~(0x7 << 8);
}
// this one replaces enum arc_side
/**
* Side not specified
*/
public static final int ARC_NONE = 0;
/**
* Arc on right
*/
public static final int ARC_RIGHT = 1;
/**
* Arc on top
*/
public static final int ARC_TOP = 2;
/**
* Arc on left
*/
public static final int ARC_LEFT = 3;
/**
* Arc on bottom
*/
public static final int ARC_BOTTOM = 4;
/**
* Bezier type flag
*/
private static final long BEZIER_TAG = 1 << 13;
/**
* Arc type flag
*/
private static final long ARC_TAG = 1 << 3;
/**
* Tail type tag
*/
private static final long TAIL_TAG = 1 << 6;
/**
* Appends arc to the list
*
* @param jarc
* arc to be append
* @return this
*/
public Arc append(Arc jarc) {
// DONE
if (jarc != null) {
next = jarc.next;
prev = jarc;
next.prev = this;
prev.next = this;
} else {
next = this;
prev = this;
}
return this;
}
/**
* Unused
*
* @return true
*/
public boolean check() {
return true;
}
/**
* Sets bezier type flag
*/
public void setbezier() {
// DONE
type |= BEZIER_TAG;
}
/**
* Returns tail of linked list coords
*
* @return tail coords
*/
public float[] tail() {
// DONE
return pwlArc.pts[0].param;
}
/**
* Returns head of linked list coords
*
* @return head coords
*/
public float[] head() {
// DONE
return next.pwlArc.pts[0].param;
}
/**
* Returns whether arc is marked with arc_tag
*
* @return is arc marked with arc_tag
*/
public boolean ismarked() {
// DONE
return ((type & ARC_TAG) > 0) ? true : false;
}
/**
* Cleans arc_tag flag
*/
public void clearmark() {
// DONE
type &= (~ARC_TAG);
}
/**
* Sets arc_tag flag
*/
public void setmark() {
// DONE
type |= ARC_TAG;
}
/**
* sets tail tag
*/
public void setitail() {
// DONE
type |= TAIL_TAG;
}
/**
* Returns whether arc is marked tail
*
* @return is tail
*/
public boolean getitail() {
return false;
}
/**
* Unsets tail tag
*/
public void clearitail() {
// DONE
type &= (~TAIL_TAG);
}
}
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