ufo.h

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/*****************************************************************************
 * $Id: ufo.h,v 1.5 2003/07/16 11:42:15 schou Exp $
 * Author: Jakob Schou Jensen <schou@sourceforge.net>
 * Licence: GPL
 *
 * Description: Ufo
 *
 ****************************************************************************/

#ifndef UFO_H
#define UFO_H

#include <adsotexture.h>
#include <adsomath.h>
#include "camera.h"
#include "rigidbody.h"
#include "object.h"
#include "animation.h"

class FlashRand {
  unsigned int random_state, init_state;

public:
  float uni(){
    double r;
    unsigned long l;

    random_state = random_state+0x12345;
    l = (random_state+0x12345)*random_state;
    random_state = l;
    r = (double)random_state/(double)0x100000000;
    return (float)r;
  }

  float norm(){
    return tan((uni()-0.5f)*2.0f);
  }
  
  void next(){ init_state = random_state; }
  void reset(){ random_state = init_state; }
  void set(unsigned int s) { init_state = s; reset(); }

  FlashRand(){ init_state = 0; random_state = 0; }
};


class Ufo : public RigidBody, public PhysicalAnimation {
  Camera *eye;
  v3f targetPos;
  float appearTimer;
  float disappearTimer;
  float flashTimer;
  float attackTimer;
  float shootTimer;

  FlashRand flashRand;

  // state
  int active, targetOpponent;

  // Drawing
  static AdsoTexture *ufoTex;
  GLuint ufoTI;
  GLuint flashTI;

 public: 
  static void setTexture(AdsoTexture *t){ ufoTex = t; }

  void appear();
  void disappear();
  void kill();
  int isActive(){ return active; }
  void activate() { appearTimer = (float)frandom(30.0f)+2.0f; }
  void draw(DrawHint);
  void update(double deltaTime);
  Ufo();
};

#endif

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