RoundedCylinder.java

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package eu.mihosoft.vrl.v3d;
 
import java.util.ArrayList;
import java.util.List;
 
import eu.mihosoft.vrl.v3d.ext.quickhull3d.HullUtil;
 
// TODO: Auto-generated Javadoc
public class RoundedCylinder extends Primitive {
 
    private final PropertyStorage properties = new PropertyStorage();
 
    private double cornerRadius = 2;
    
    private int resolution = 30;
 
    private double startRadius;
 
    private double endRadius;
 
    private double height;
    
    private int numCornerSlices;
 
    public RoundedCylinder(double startRadius, double endRadius, double height, int numSlices) {
        this.startRadius = startRadius;
        this.endRadius = endRadius;
        this.height = height;
        this.resolution = numSlices;
        setNumCornerSlices(6);
    }
 
    public RoundedCylinder(double startRadius,  double height) {
        this.startRadius = startRadius;
        this.endRadius = startRadius;
        this.height = height;
        this.resolution = 30;
        setNumCornerSlices(6);
    }
 
    
    /* (non-Javadoc)
     * @see eu.mihosoft.vrl.v3d.Primitive#toPolygons()
     */
    @Override
    public List<Polygon> toPolygons() {
        double minHeight = height-cornerRadius*2;
        ArrayList<CSG> cylParts =new ArrayList<>();
 
        for(int i=0;i<numCornerSlices;i++){
            double radIncs = startRadius-cornerRadius+Math.sin(Math.PI/2*((double)i/(double)numCornerSlices))*cornerRadius;
            double radInce = endRadius-cornerRadius+Math.sin(Math.PI/2*((double)i/(double)numCornerSlices))*cornerRadius;
 
            double heightInc = (Math.cos(Math.PI/2*((double)i/(double)(numCornerSlices)))*cornerRadius);
            cylParts.add(
                new Cylinder(radIncs, // Radius at the bottom
                            radInce, // Radius at the top
                            heightInc*2+minHeight, // Height
                            (int)resolution //resolution
                            )
                            .toCSG()
                            .movez(-heightInc)
            );
        }
        return HullUtil.hull(cylParts).toZMin().getPolygons();
    }
 
    /* (non-Javadoc)
     * @see eu.mihosoft.vrl.v3d.Primitive#getProperties()
     */
    @Override
    public PropertyStorage getProperties() {
        return properties;
    }
 
 
    public int getResolution() {
        return resolution;
    }
    
    public RoundedCylinder resolution(int resolution) {
        this.resolution = resolution;
        return this;
    }
 
    public double getCornerRadius() {
        return cornerRadius;
    }
    
    public RoundedCylinder cornerRadius(double cornerRadius) {
        this.cornerRadius = cornerRadius;
        return this;
    }
 
 
 
    public int getNumCornerSlices() {
        return numCornerSlices;
    }
 
 
 
    public RoundedCylinder setNumCornerSlices(int numCornerSlices) {
        this.numCornerSlices = numCornerSlices;
        return this;
    }
 
}