import Point3D;
import java.awt.Color;
import Vector3D;

public class Vertex3D extends Point3D {

public float w;           // coordinate of vertex
public float nx, ny, nz;        // vertex normal
public boolean hasNormal;

  public Vertex3D()
  {
    nx = ny = nz = 0;
    hasNormal = false;
  }

  public Vertex3D(Vector3D v) {
    x = v.x;
    y = v.y;
    z = v.z;
    w = 1;
    nx = ny = nz = 0;
    hasNormal = false;
  }
  
  public Vertex3D(float xval, float yval, float zval)
  {
    x = xval;
    y = yval;
    z = zval;
    w = 1;
    nx = ny = nz = 0;
    hasNormal = false;
  }
  
  public void copy(Vertex3D v)
  {
    x = v.x;        y = v.y;        z = v.z;    w = v.w;
    nx = v.nx;      ny = v.ny;      nz = v.nz;
    hasNormal = v.hasNormal;
  }
  
  public void setNormal(float xval, float yval, float zval) {
    float l = (float) (1 / Math.sqrt(xval*xval + yval*yval + zval*zval));
    xval *= l;
    yval *= l;
    zval *= l;
    nx = xval;
    ny = yval;
    nz = zval;
    hasNormal = true;
  }
  

  public void normalize( )
  {
    if (w != 1) {
      w = 1 / w;
      x *= w;
      y *= w;
      z *= w;
      w = 1;
    }
  }
  
  public String toString()
  {
    return new String(" ["+x+", "+y+", "+z+", "+w+"]");
  }

}