> From: "Donald W. Doherty" <[EMAIL PROTECTED]>
>
> Has anyone written classes for creating visible coordinate axes (and
> that they are will to share)? That is, classes that make it easy to
> display text, numbers, tick marks, etc. along visible x, y, and z axes.
Here is one. It creates a coordSys with x=Red, y=Green, z=Blue, with an initial
scale and translation settable in the constructor. No text or tick marks, but
it's a start.
Doug Gehringer
Sun Microsystems
/*
* @(#)CoordSys.java 1.3 98/12/22 15:33:59
*
* Copyright (c) 1996-1998 Sun Microsystems, Inc. All Rights Reserved.
*
* Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
* modify and redistribute this software in source and binary code form,
* provided that i) this copyright notice and license appear on all copies of
* the software; and ii) Licensee does not utilize the software in a manner
* which is disparaging to Sun.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
* IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
* NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
* LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
* OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
* LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
* INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
* CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
* OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* This software is not designed or intended for use in on-line control of
* aircraft, air traffic, aircraft navigation or aircraft communications; or in
* the design, construction, operation or maintenance of any nuclear
* facility. Licensee represents and warrants that it will not use or
* redistribute the Software for such purposes.
*/
import javax.media.j3d.*;
import javax.vecmath.*;
public class CoordSys extends TransformGroup {
double scale = 1.0;
Vector3f translation = new Vector3f();
Point3d origin = new Point3d(0.0, 0.0, 0.0);
Point3d plusX = new Point3d(1.0, 0.0, 0.0);
Point3d plusY = new Point3d(0.0, 1.0, 0.0);
Point3d plusZ = new Point3d(0.0, 0.0, 1.0);
Point3d arrowRight = new Point3d();
Point3d arrowLeft = new Point3d();
Point3d arrowUp = new Point3d();
Point3d arrowDown = new Point3d();
Point3d[] line = new Point3d[10];
public CoordSys(double scale) {
this.scale = scale;
setup();
}
public CoordSys(double scale, Vector3d translation) {
this.scale = scale;
this.translation.set(translation);
setup();
}
public CoordSys() {
setup();
}
private void setup() {
// Can be used to make coordSys smaller TODO: specify in constructor
Transform3D coordTrans = new Transform3D();
coordTrans.setTranslation(translation);
coordTrans.setScale(scale);
setTransform(coordTrans);
RenderingAttributes ra = new RenderingAttributes();
ra.setDepthBufferEnable(true);
LineArray xGeom = new LineArray(10, LineArray.COORDINATES);
setupArrow(plusX, plusY, plusZ);
xGeom.setCoordinates(0, line);
ColoringAttributes xColoringAttributes = new ColoringAttributes(
1.0f, 0.0f, 0.0f, ColoringAttributes.SHADE_FLAT);
Appearance xAppearance = new Appearance();
xAppearance.setColoringAttributes(xColoringAttributes);
xAppearance.setRenderingAttributes(ra);
Shape3D xShape = new Shape3D(xGeom, xAppearance);
addChild(xShape);
LineArray yGeom = new LineArray(10, LineArray.COORDINATES);
setupArrow(plusY, plusX, plusZ);
yGeom.setCoordinates(0, line);
ColoringAttributes yColoringAttributes = new ColoringAttributes(
0.0f, 1.0f, 0.0f, ColoringAttributes.SHADE_FLAT);
Appearance yAppearance = new Appearance();
yAppearance.setColoringAttributes(yColoringAttributes);
yAppearance.setRenderingAttributes(ra);
Shape3D yShape = new Shape3D(yGeom, yAppearance);
addChild(yShape);
LineArray zGeom = new LineArray(10, LineArray.COORDINATES);
setupArrow(plusZ, plusX, plusY);
zGeom.setCoordinates(0, line);
ColoringAttributes zColoringAttributes = new ColoringAttributes(
0.0f, 0.0f, 1.0f, ColoringAttributes.SHADE_FLAT);
Appearance zAppearance = new Appearance();
zAppearance.setColoringAttributes(zColoringAttributes);
zAppearance.setRenderingAttributes(ra);
Shape3D zShape = new Shape3D(zGeom, zAppearance);
addChild(zShape);
}
private void setupArrow(Point3d forward, Point3d right, Point3d up) {
line[0] = origin;
line[1] = forward;
line[2] = forward;
arrowRight.x = forward.x * 0.9 + right.x * 0.03;
arrowRight.y = forward.y * 0.9 + right.y * 0.03;
arrowRight.z = forward.z * 0.9 + right.z * 0.03;
line[3] = arrowRight;
line[4] = forward;
arrowLeft.x = forward.x * 0.9 - right.x * 0.03;
arrowLeft.y = forward.y * 0.9 - right.y * 0.03;
arrowLeft.z = forward.z * 0.9 - right.z * 0.03;
line[5] = arrowLeft;
line[6] = forward;
arrowUp.x = forward.x * 0.9 + up.x * 0.03;
arrowUp.y = forward.y * 0.9 + up.y * 0.03;
arrowUp.z = forward.z * 0.9 + up.z * 0.03;
line[7] = arrowUp;
line[8] = forward;
arrowDown.x = forward.x * 0.9 - up.x * 0.03;
arrowDown.y = forward.y * 0.9 - up.y * 0.03;
arrowDown.z = forward.z * 0.9 - up.z * 0.03;
line[9] = arrowDown;
}
}
