// --------------------------------------------------------------------------
//
// Copyright (c) 2003 Thomas D. Marsh. All rights reserved.
//
// "SSC" is free software; you can redistribute it
// and/or use it and/or modify it under the terms of
// the "GNU General Public License" (GPL).
//
// --------------------------------------------------------------------------

#include "object.h"
#include "model.h"
#include "common.h"
#include "global.h"

bool ScreenObject::onScreen()
{
	return ((square(mPosition.x-Global::ship->mPosition.x)+
                 square(mPosition.y-Global::ship->mPosition.y))
		 <= square(600));
}

ScreenObject::ScreenObject(ObjectType t,
			   int nradius, double nmass, double ms,
			   double x, double y, double z,
			   double fx, double fy, double fz)
	: PhysicsObject(nradius, nmass, x, y, z, fx, fy, fz, (void*) this),
	  rotation(0),
	  radius(nradius),
	  mFlocking(false),
	  mGravity(false),
	  mGravityAffect(0,0),
	  mType(t), mState(CREATE),
	  mMaxSpeed(ms),
	  next(0), prev(0),
	  mDecelFlag(false)
{
	Model::getInstance()->addObject(this);
	reset();
}


void ScreenObject::behave() {}



// ------------------------------------------------------------------
//
// CTOR & DTOR
//
// ------------------------------------------------------------------

ScreenObject::~ScreenObject()
{
}

void ScreenObject::accelerate(double dt)
{
	sync();
	double fx =  sin(rotation)*dt*10,
	       fy = -cos(rotation)*dt*10;

	PhysicsObject::accelerate(fx, fy, 0);
}

void ScreenObject::decelerate(double dt)
{
	double rot = atan2(mVelocity.x, -mVelocity.y)+M_PI;
	double tmp = rotation;
	rotation = rot;
	mDecelFlag = true;
	accelerate(speed*.05*dt);
	mDecelFlag = false;
	rotation = tmp;
}


void ScreenObject::move(double dt)
{
	sync();
	double amt = mass * mVelocity.z * dt * .1;
	if (mVelocity.z < 0) PhysicsObject::accelerate(0.0, 0.0, -amt);
	if (mVelocity.z > 0) PhysicsObject::accelerate(0.0, 0.0,  amt);
	if (speed > mMaxSpeed)
		decelerate(dt);
	reset();
}

void ScreenObject::rotate(double dir)
{
	rotation += dir;
	while (rotation > D_PI)    rotation -= D_PI;
	while (rotation < 0)       rotation += D_PI;
}


void ScreenObject::reset()
{
	mGravityAffect.set(0, 0);
}