import java.awt.Color;

public class Vertex3D {
  public float x, y, z, w;           // coordinate of vertex
  public float nx, ny, nz;        // vertex normal
  public boolean hasNormal;
  public int argb;
  
  public Vertex3D()
    {
      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+"]");
    }
}