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package common;
import com.sun.j3d.utils.image.*;
import javax.media.j3d.*;
import javax.vecmath.*;
@SuppressWarnings("restriction")
public class Circle extends Polygon {
public Circle(float radius, Vector3f position, Vector3f normal) {
this(1, radius, position, normal);
}
public Circle(float mass, float radius, Vector3f position, Vector3f normal) {
super(mass, position, normal);
setShape(createShape(radius, 22));
if (inverseMass != 0) {
inverseInertiaTensor.m00 = 1f / 4 / inverseMass * radius * radius;
inverseInertiaTensor.m11 = 2 * inverseInertiaTensor.m00;
inverseInertiaTensor.m22 = inverseInertiaTensor.m00;
inverseInertiaTensor.invert();
}
updateTransformGroup();
}
protected Node createShape(float radius, int divisions) {
TriangleFanArray geometry = new TriangleFanArray(divisions, TriangleFanArray.COORDINATES | TriangleFanArray.TEXTURE_COORDINATE_2, new int[] {divisions});
for (int i = 0; i < divisions; i++) {
float baseX = (float)Math.cos(2 * Math.PI * i / divisions);
float baseZ = -(float)Math.sin(2 * Math.PI * i / divisions);
geometry.setCoordinate(i, new Point3f(radius * baseX, 0, radius * baseZ));
geometry.setTextureCoordinate(0, i, new TexCoord2f((baseX + 1) / 2, (-baseZ + 1) / 2));
}
TextureLoader tl = new TextureLoader("wood.jpg", null);
ImageComponent2D image = tl.getImage();
int width = image.getWidth();
int height = image.getHeight();
Texture2D texture = new Texture2D(Texture.MULTI_LEVEL_MIPMAP, Texture.RGB, width, height);
int imageLevel = 0;
texture.setImage(imageLevel, image);
while (width > 1 || height > 1) {
imageLevel++;
if (width > 1) width /= 2;
if (height > 1) height /= 2;
texture.setImage(imageLevel, tl.getScaledImage(width, height));
}
texture.setMagFilter(Texture2D.NICEST);
texture.setMinFilter(Texture2D.NICEST);
Appearance appearance = new Appearance();
appearance.setTexture(texture);
PolygonAttributes polyAttr = new PolygonAttributes(PolygonAttributes.POLYGON_FILL, PolygonAttributes.CULL_NONE, 0);
appearance.setPolygonAttributes(polyAttr);
return new Shape3D(geometry, appearance);
}
}
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