Mario,
a sugestion to change material:
public void setSphereAppearance(Material newmat)
{
mySphere.getAppearance().setMaterial(newmat);
}
and add this capability to Sphere :
sphere.setCapability(ENABLE_APPEARANCE_MODIFY );
--- "ZACZEK, MARIUSZ P. (MARIO) (JSC-DM) (NASA)"
<[EMAIL PROTECTED]> escreveu: > Hi,
> I've been racking my brain for over a day on this
> and can't figure out
> what I'm doing wrong or not doing.
>
> I place a 3D Sphere into my scenegraph, and later I
> want to change the
> color of it. But when I press the button to reset
> it's appearance to the
> new color/material:
> public void setSphereAppearance(Material newmat) {
> planetApp.setMaterial(newmat);
> mySphere.setAppearance(planetApp);
> }
>
> I get a error saying: Shape3D: no capability to set
> appearance
> Although...it changes the color...wierd. I'm pretty
> sure I set all
> the needed capability flags but maybe I'm missing
> something. I've copied
> the code for my 3D sphere below...it's a BranchGroup
> so it can be
> added to a live scenegraph.
>
> I'd appreciate any suggestions..
>
> Mario
>
>
>
> CODE:
> ==================================================
> // Import the 3D API libraries for viewing 3D
> environments.
> import com.sun.j3d.utils.geometry.*;
> import javax.media.j3d.*;
> import javax.vecmath.*;
>
> // Import the math library.
> import java.lang.Math.*;
>
>
> /**
> *
> */
> public class Sphere3d extends BranchGroup {
>
> //
> // Variable declarations
> //
> private double _scaleValue = 1.0f;
> private Vector3f _transValue = new Vector3f(0.0f,
> 0.0f, 0.0f);
> private Transform3D _scaleTran; // Scale
> transform
> private Transform3D _transTran; // Translation
> transform
> private Transform3D _oldTrans = new Transform3D();
> private TransformGroup mainTG = new
> TransformGroup();
> private boolean _solid = false;
> private Color3f _color = new Color3f();
> private Vector3f _base = new Vector3f();
> private float _scale = 1.0f;
> private float _dim1 = 0.0f;
> private Appearance planetApp;
> private Sphere mySphere;
> Color3f black = new Color3f(0.20f, 0.20f,
> 0.20f);
>
>
> /**
> * Calls the 'defineVrml' function to define the
> VRML model
> * by setting the initial scale, translation and
> rotation.
> *
> */
> public Sphere3d(boolean solid, Color3f color,
> Vector3f base, float scale,
> float dim1){
>
> this.addChild(mainTG);
>
this.setCapability(BranchGroup.ALLOW_CHILDREN_WRITE);
>
>
> System.out.println("\n Cannot simply define
> blank Sphere3d");
>
> setVariables(solid, color, base, scale, dim1);
> definePrimitive();
>
> drawSphere(solid,dim1);
>
> setPosition(base.x, base.y, base.z);
> setScale(scale);
> }
>
>
>
> /**
> *
> *
> *
> */
> private void setVariables(boolean solid, Color3f
> color, Vector3f base,
> float scale, float dim1) {
> _solid = solid;
> _color = color;
> _base = base;
> _scale = scale;
> _dim1 = dim1;
> }
>
>
>
> public boolean getSolid() {
> return _solid;
> }
>
> public Color3f getColor() {
> return _color;
> }
>
> public Vector3f getBase() {
> return _base;
> }
>
> public float getScaleVal() {
> return _scale;
> }
>
> public float getDim1() {
> return _dim1;
> }
>
>
>
>
>
>
> /**
> *
> *
> *
> */
> private void drawSphere(boolean solid, float
> radius) {
> if (!solid) {
> ColoringAttributes ca = new
> ColoringAttributes();
> ca.setColor(_color);
>
> PolygonAttributes pa = new
> PolygonAttributes();
> pa.setPolygonMode
> (PolygonAttributes.POLYGON_LINE);
>
> Appearance ap = new Appearance();
> ap.setColoringAttributes (ca);
> ap.setPolygonAttributes (pa);
>
> mainTG.addChild(new Sphere(radius,ap));
> } else if (solid) {
> planetApp = new Appearance();
>
>
planetApp.setCapability(Appearance.ALLOW_MATERIAL_WRITE);
>
>
planetApp.setCapability.Appearance.ALLOW_COLORING_ATTRIBUTES_WRITE);
> TransparencyAttributes _transAttrs;
> float _transparency = 0.0f;
> float _curtransparency = 0.0f;
>
> Transform3D _transTrans = new
> Transform3D();
> _transAttrs = new
> TransparencyAttributes(TransparencyAttributes.NONE,
> _transparency);
> // Allow the transparency value to be
> overwritten.
>
>
_transAttrs.setCapability(TransparencyAttributes.ALLOW_VALUE_WRITE);
> // Allow the transparency mode to be
> overwritten.
>
>
_transAttrs.setCapability(TransparencyAttributes.ALLOW_MODE_WRITE);
>
> planetApp.setTransparencyAttributes(_transAttrs);
>
>
> Material m = new
> Material(_color,black,_color,black,64.0f);
> planetApp.setMaterial(m);
>
> // Draw the sphere for the planet and add the
> texture to it
> mainTG.addChild(mySphere = new Sphere(radius,
> Sphere.GENERATE_TEXTURE_COORDS |
>
> Sphere.GENERATE_NORMALS,
>
=== message truncated ===
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