import java.io.*;
import java.lang.*;

/** 
  * Material describes the surface properties of an object using
  * ambient, diffuse and specular components.
  *
  * @author Anthony Steed
  * @version 1.0
  */

public class Material {

  /** 
    * Holds the ambient component of this surface
    */
  public Colour Ambient;

  /** 
    * Holds the ambient component of this surface
    */
  public Colour Diffuse;

  /** 
    * Holds the specular component of this surface
    */
  public Colour Specular;

  /** 
    * Holds the shininess factor this surface
    */
  public double Shininess;

  /**
    * Create a default material
    */
  public Material() {
    Ambient = new Colour();
    Diffuse = new Colour();
    Specular = new Colour();
    Shininess = 0.0;
  }

 
  /** 
    * Create a new material by copying an existing material.
    * @param m the material to copy
    */
  public Material(Material m) {
    Ambient = new Colour(m.Ambient);
    Diffuse = new Colour(m.Diffuse);
    Specular = new Colour(m.Specular);
    Shininess = m.Shininess;
  }

  /**
    * Read the material from the given source
    * @param is the source to read from
    * @exception java.io.IOException
    * if the light can not be read
    * @exception java.io.NumberFormatException
    * if there a number format error is encountered
    */
  public void read(SceneReader is) 
    throws IOException, NumberFormatException {
      Ambient.read(is);
      Diffuse.read(is);
      Specular.read(is);
      Shininess = is.readDouble();
  }

  /**
    * Write the material to the given destination
    * @param os  the destination to write to
    * @exception java.io.IOException
    * if the write fails.
    */
  public void write(SceneWriter os) throws IOException {
    Ambient.write(os);
    Diffuse.write(os);
    Specular.write(os);
    os.writeDouble(Shininess);
    os.writeChar(' ');
  }

  /** 
    * Print a human readable version of the material definition to the
    * given destination
    * @param os  the destination to write to
    * @exception java.io.IOException
    * if the write fails.
    */
  public void print(SceneWriter os) throws IOException {
    os.writeString("Material: ambient ");
    Ambient.print(os);
    os.writeString(" diffuse ");
    Diffuse.print(os);
    os.writeString(" specular ");
    Specular.print(os);
    os.writeString(" shininess ");
    os.writeDouble(Shininess);
    os.writeString("\n");
  }
}