?? colouredtile.java
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// ColouredTile.java
// Andrew Davison, March 2002, dandrew@ratree.psu.ac.th
// ColouredTile creates a coloured quad array of 4 vertices.
import javax.media.j3d.*;
import javax.vecmath.*;
public class ColouredTile extends Shape3D
{
private static final int NUM_VERTS = 4;
private QuadArray plane;
public ColouredTile(Point3f p1, Point3f p2, Point3f p3, Point3f p4,
Color3f col)
{
plane = new QuadArray(NUM_VERTS,
GeometryArray.COORDINATES | GeometryArray.COLOR_3 );
createGeometry(p1, p2, p3, p4, col);
createAppearance();
}
private void createGeometry(Point3f p1, Point3f p2, Point3f p3,
Point3f p4, Color3f col)
{ // counter-clockwise point specification
plane.setCoordinate(0, p1);
plane.setCoordinate(1, p2);
plane.setCoordinate(2, p3);
plane.setCoordinate(3, p4);
Color3f cols[] = new Color3f[NUM_VERTS];
for (int i=0; i < NUM_VERTS; i++)
cols[i] = col;
plane.setColors(0, cols);
setGeometry(plane);
} // end of createGeometry()
private void createAppearance()
{
Appearance app = new Appearance();
PolygonAttributes pa = new PolygonAttributes();
pa.setCullFace(PolygonAttributes.CULL_NONE);
// so can see the ColouredTile from both sides
app.setPolygonAttributes(pa);
setAppearance(app);
} // end of createAppearance()
} // end of ColouredTile class
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