From c8e0d487886dbec1e3a994ea36724bbf59f5122a Mon Sep 17 00:00:00 2001
From: Kenneth Russel <kbrussel@alum.mit.edu>
Date: Tue, 9 Oct 2007 07:38:25 +0000
Subject: Integration of Tomas Hrasky's port of basic GLU NURBS functionality
 from C++ to Java, plus example applications, done as part of his Bachelor of
 Science degree at the University of Hradec Králové, Faculty of Informatics
 and Management.
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Current state of code is documented in
src/classes/com/sun/opengl/impl/nurbs/README.txt.

Example applications require Java 1.5 and are not currently built by
default. Specify -Djogl.nurbs=1 during jogl-demos build with a 1.5
javac on the PATH to build them. Dependent jars are copied to build
output directory.

Deleted old partially-complete GLU NURBS port.


git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/../svn-server-sync/jogl-demos/trunk@223 3298f667-5e0e-4b4a-8ed4-a3559d26a5f4
---
 .../nurbs/knotslidercomponent/KnotPolygon.java     | 159 +++++++++++++++++++++
 1 file changed, 159 insertions(+)
 create mode 100755 src/demos/nurbs/knotslidercomponent/KnotPolygon.java

(limited to 'src/demos/nurbs/knotslidercomponent/KnotPolygon.java')

diff --git a/src/demos/nurbs/knotslidercomponent/KnotPolygon.java b/src/demos/nurbs/knotslidercomponent/KnotPolygon.java
new file mode 100755
index 0000000..5665392
--- /dev/null
+++ b/src/demos/nurbs/knotslidercomponent/KnotPolygon.java
@@ -0,0 +1,159 @@
+package demos.nurbs.knotslidercomponent;
+
+import java.awt.Polygon;
+
+/**
+ * Object representing knot
+ * Objekt reprezentující uzel v uzlovém vektoru
+ * @author Tomáš Hráský
+ *
+ */
+@SuppressWarnings("serial")
+class KnotPolygon extends Polygon implements Comparable {
+	/**
+	 * Knot value
+	 * Hodnota uzlu
+	 */
+	private Double value;
+
+	/**
+	 * Size of change when moved by one pixel
+	 * Velikost změny při posunu o jeden pixel
+	 */
+	private double oneStep;
+
+	/**
+	 * Top space
+	 * Horní mezera osy
+	 */
+	private int top;
+
+	/**
+	 * Side space
+	 * Boční mezera osy
+	 */
+	private int side;
+
+	/**
+	 * Knot multiplicity
+	 * Násobnost uzlu
+	 */
+	private int multi;
+	
+	/**
+	 * Creates new instance with given values
+	 * Vytvoří instanci se zadanými hodnotami
+	 * @param d knot value
+	 * @param oneStep change of one pixel movement
+	 * @param top top space
+	 * @param side side space
+	 */
+	public KnotPolygon(Double d, double oneStep, int top, int side) {
+		this.value = d;
+		xpoints = new int[3];
+		ypoints = new int[3];
+		npoints = 3;
+		multi=1;
+		makeCoords(oneStep, top, side);
+	}
+
+	/**
+	 * Computes coords of polygon representing knot
+	 * Vypočte souřadnice polygonu reprezentujícího uzel
+	 * @param oneStep change of one pixel movement
+	 * @param top top space
+	 * @param side side space
+	 */
+	private void makeCoords(double oneStep, int top, int side) {
+		this.oneStep = oneStep;
+		this.top = top;
+		this.side = side;
+
+		int x = (int) (value / oneStep);
+		x += side;
+
+		xpoints[0] = x;
+		xpoints[1] = x - 4;
+		xpoints[2] = x + 4;
+		ypoints[0] = top + 2;
+		ypoints[1] = top + 12;
+		ypoints[2] = top + 12;
+		
+		invalidate();
+	}
+
+	/**
+	 * Computes coords from set values
+	 * Vypočte souřadnice podle nastavených hodont
+	 */
+	private void makeCoords() {
+		makeCoords(oneStep, top, side);
+	}
+
+	/**
+	 * Computes coords from given values
+	 * Vypočte souřadnice podle zadaných hodont
+	 * @param oneStep step of one pixel movement
+	 * @param top top space
+	 * @param side side space
+	 */
+	public void update(double oneStep, int top, int side) {
+		makeCoords(oneStep, top, side);
+	}
+
+	/**
+	 * Updates coords from given coord of polygon top
+	 * Upraví souřadnice podle nové zadané souřadnice vrcholu polygonu
+	 * @param x nová souřadnice vrcholu
+	 */
+	public void updateByX(int x) {
+		value = oneStep * (x - side);
+		makeCoords();
+	}
+	
+	/**
+	 * Updates coords from given value of knot
+	 * Upraví souřadnice polygonu podle nové hodnoty
+	 * @param d nová hodnota
+	 */
+	public void updateByValue(Double d){
+		value=d;
+		makeCoords();
+	}
+
+	public int compareTo(Object o) {
+		if (o instanceof KnotPolygon) {
+			KnotPolygon kp = (KnotPolygon) o;
+			return getValue().compareTo(kp.getValue());
+		} else
+			return 0;
+	}
+
+	/**
+	 * Returns knot value
+	 * Vrací hodnotu uzlu
+	 * @return knot value
+	 */
+	public Double getValue() {
+		return value;
+	}
+
+	/**
+	 * Returns knot multiplicity
+	 * Vrací násobnost uzlu
+	 * @return knot multiplicity
+	 */
+	public int getMulti() {
+		return multi;
+	}
+
+	/**
+	 * Sets knot multiplicity
+	 * Nastavuje násobnost uzlu
+	 * @param multi knot multiplicity
+	 */
+	public void setMulti(int multi) {
+		this.multi = multi;
+	}
+
+}
-- 
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