From 4cda4b70dbcd21cf57e1e253ddba32b88bcaec18 Mon Sep 17 00:00:00 2001
From: Sven Gothel <sgothel@jausoft.com>
Date: Tue, 8 Feb 2011 06:20:35 +0100
Subject: Move implementation private files from com.jogamp.<module>.impl. to
jogamp.<module> (1/2) - rename task
- com.jogamp.opengl.impl -> jogamp.opengl
- com.jogamp.opengl.util.glsl.fixedfunc.impl -> jogamp.opengl.util.glsl.fixedfunc
- com.jogamp.nativewindow.impl -> jogamp.nativewindow
- com.jogamp.newt.impl -> jogamp.newt
This sorts implementation details from the top level, ie skipping the public 'com',
allowing a better seperation of public classes and implementation details
and also reduces strings.
This approach of public/private seperation is also used in the OpenJDK.
---
.../jogamp/opengl/glu/nurbs/Knotvector.java | 179 +++++++++++++++++++++
1 file changed, 179 insertions(+)
create mode 100644 src/jogl/classes/jogamp/opengl/glu/nurbs/Knotvector.java
(limited to 'src/jogl/classes/jogamp/opengl/glu/nurbs/Knotvector.java')
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/Knotvector.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/Knotvector.java
new file mode 100644
index 000000000..658a1cbda
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/Knotvector.java
@@ -0,0 +1,179 @@
+package com.jogamp.opengl.impl.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.
+ */
+
+/**
+ * Knot vector used in curve specification
+ *
+ * @author Tomas Hrasky
+ *
+ */
+public class Knotvector {
+
+ /**
+ * Tolerance used when comparing knots - when difference is smaller, knots
+ * are considered equal
+ */
+ public static final float TOLERANCE = 1.0e-5f;
+
+ /**
+ * Maximum curve order
+ */
+ private static final int MAXORDER = 24;
+
+ /**
+ * Number of knots
+ */
+ int knotcount;
+
+ /**
+ * Number of control points' coordinates
+ */
+ int stride;
+
+ /**
+ * Curve order
+ */
+ int order;
+
+ /**
+ * Knots
+ */
+ float[] knotlist;
+
+ /**
+ * Makes new knotvector
+ *
+ * @param nknots
+ * number of knots
+ * @param stride
+ * number of ctrl points' corrdinates
+ * @param order
+ * curve order
+ * @param knot
+ * knots
+ */
+ public Knotvector(int nknots, int stride, int order, float[] knot) {
+ // DONE
+ init(nknots, stride, order, knot);
+ }
+
+ /**
+ * Initializes knotvector
+ *
+ * @param nknots
+ * number of knots
+ * @param stride
+ * number of ctrl points' corrdinates
+ * @param order
+ * curve order
+ * @param knot
+ * knots
+ */
+ public void init(int nknots, int stride, int order, float[] knot) {
+ // DONE
+ this.knotcount = nknots;
+ this.stride = stride;
+ this.order = order;
+ this.knotlist = new float[nknots];
+ for (int i = 0; i < nknots; i++) {
+ this.knotlist[i] = knot[i];
+ }
+
+ }
+
+ /**
+ * Validates knot vector parameters
+ *
+ * @return knot vector validity
+ */
+ public int validate() {
+ int kindex = knotcount - 1;
+ if (order < 1 || order > MAXORDER) {
+ return 1;
+ }
+ if (knotcount < 2 * order) {
+ return 2;
+ }
+ if (identical(knotlist[kindex - (order - 1)], knotlist[order - 1])) {
+ return 3;
+ }
+ for (int i = 0; i < kindex; i++) {
+ if (knotlist[i] > knotlist[i + 1])
+ return 4;
+ }
+ int multi = 1;
+ for (; kindex >= 1; kindex--) {
+ if (knotlist[kindex] - knotlist[kindex - 1] < TOLERANCE) {
+ multi++;
+ continue;
+ }
+ if (multi > order) {
+ return 5;
+ }
+ multi = 1;
+ }
+ if (multi > order) {
+ return 5;
+ }
+
+ return 0;
+ }
+
+ /**
+ * Show specified message
+ *
+ * @param msg
+ * message to be shown
+ */
+ public void show(String msg) {
+ // TODO Auto-generated method stub
+ // System.out.println("TODO knotvector.show");
+
+ }
+
+ /**
+ * Compares two knots for equality
+ *
+ * @param a
+ * first knot
+ * @param b
+ * second knot
+ * @return knots are/are not equal
+ */
+ public static boolean identical(float a, float b) {
+ return ((a - b) < TOLERANCE) ? true : false;
+ }
+}
--
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