code: public void lineTo(double x, double y, double z) {
  		ensureSlots(true, 3);
  		this.types[this.numTypes++] = PathElementType.LINE_TO;
  		this.coords[this.numCoords++] = x;
  		this.coords[this.numCoords++] = y;
  		this.coords[this.numCoords++] = z;
  		this.isEmpty = null;
  		this.graphicalBounds = null;
  		this.logicalBounds = null;
  	}
docs: Adds a point to the path by drawing a straight line from the
  current coordinates to the new specified coordinates
  specified in double precision.
  
  @param x the specified X coordinate
  @param y the specified Y coordinate
  @param z the specified Z coordinate