How to use

setDiffuseColor

method

in

javax.media.j3d.Material

  private void setColor (Appearance ap, Color c) {
    Material m = ap.getMaterial();
    m.setAmbientColor(new Color3f(c));
    m.setDiffuseColor(new Color3f(c));
    float alpha = ((float)c.getAlpha()) / 255;
    if (alpha < 1.0) {
      TransparencyAttributes t = new TransparencyAttributes();
      t.setTransparencyMode(TransparencyAttributes.BLENDED);
      t.setTransparency(1 - alpha);
      ap.setTransparencyAttributes(t);
    } else ap.setTransparencyAttributes(null);
  }
}

  private void setColor (Appearance ap, Color c) {
    Material m = ap.getMaterial();
    m.setAmbientColor(new Color3f(c));
    m.setDiffuseColor(new Color3f(c));
    float alpha = ((float)c.getAlpha()) / 255;
    if (alpha < 1.0) {
      TransparencyAttributes t = new TransparencyAttributes();
      t.setTransparencyMode(TransparencyAttributes.BLENDED);
      t.setTransparency(1 - alpha);
      ap.setTransparencyAttributes(t);
    } else ap.setTransparencyAttributes(null);
  }
}

float b = color.getBlue() / 255.f;
mat.setDiffuseColor(r, g, b);

float b = color.getBlue() / 255.f;
mat.setDiffuseColor(r, g, b);

float b = color.getBlue() / 255.f;
mat.setDiffuseColor(r, g, b);

mat.setDiffuseColor(r, g, b); 

mat.setDiffuseColor(r, g, b);

/**
 * Returns a solid appearance.
 * @return the appearance
 */
private Appearance getColoredAppearance() {
  Appearance a = new Appearance();
  PolygonAttributes pa = new PolygonAttributes();
  pa.setCullFace(PolygonAttributes.CULL_NONE);  // see both sides of shape
  pa.setPolygonMode(PolygonAttributes.POLYGON_FILL);
  pa.setBackFaceNormalFlip(true);
  a.setPolygonAttributes(pa);
  LineAttributes la = new LineAttributes();
  la.setLineAntialiasingEnable(true);
  la.setLineWidth(1.f);
  a.setLineAttributes(la);
  Material mat = new Material();
  mat.setSpecularColor(1.f, 1.f, 0.8f);
  mat.setDiffuseColor(1.f, 0.4f, 0.1f);
  mat.setShininess(20.f);
  mat.setLightingEnable(true);
  a.setMaterial(mat);
  return a;
}