// Jetpac remake using Irrlicht
// Copyright Gaz Davidson (gaz@bitplane.net)

#ifndef __JETPAC_ENTITY_INCLUDED__
#define __JETPAC_ENTITY_INCLUDED__

#include <ISceneNode.h>
#include <IMesh.h>

namespace irr
{
namespace scene
{

class GameEntity : public ISceneNode
{
public:
	GameEntity(ISceneManager* mgr, core::vector3df position=core::vector3df(0,0,0), 
		core::vector3df scale=core::vector3df(1,1,1))
	 : ISceneNode(mgr->getRootSceneNode(), mgr, -1, position),
	 Velocity(0,0,0), ExpiryTime(0),
	 HasGravity(false), IsDestructable(true), IsAlive(true), IsFragile(false),
	 Expires(false), Resting(false), LastTime(0), IsCarryable(false),
	 Score(0), PickUpStage(0), LevelUp(false), LeftFacing(false)
	{
		setAutomaticCulling(EAC_OFF);
	}

	virtual const core::aabbox3d<f32>& getBoundingBox() const { return Box; }
	virtual void OnAnimate(u32 timeMs)
	{
		if (!LastTime)
			LastTime=timeMs;

		f32 t = (f32)(timeMs-LastTime);
		LastTime = timeMs;
		if (!t)
			return;

		core::vector3df newP = getPosition();

		if (HasGravity && !Resting)
		{
			newP -= core::vector3df(0,Gravity*t,0);
			Velocity -= Velocity * (1-powf(Resistance,t));
		}

		newP += Velocity*t;

		// is the position off the screen?
		if (newP.X > MaxX || newP.X < -MaxX)
		{
			newP.X += (MaxX*2) * ( newP.X < 0 ? 1 : -1);
		}
		if (newP.Y < -MaxY)
		{
			newP.Y = MaxY *0.25f;
		}

		setPosition(newP);
		ISceneNode::OnAnimate(timeMs);
	}
	virtual void render() { }
	void setLeftFacing(bool facing)
	{
		LeftFacing = facing;
		setRotation(core::vector3df(0, LeftFacing ? 180.0f : 0, 0));
	}

	core::vector3df Velocity;

	bool HasGravity, // does it fall
		 IsDestructable, // can it be destroyed?
		 IsAlive, // is it playing?
		 IsFragile, // does it break if it hits something solid?
		 Expires, // does it expire?
		 Resting, // has it landed?
		 IsCarryable, // is it something you carry round?
		 LevelUp, // when it hits the ground, does the ship get more complete?
		 LeftFacing; // is it flipped?
	u32 ExpiryTime;
	s32 Score, PickUpStage;
	core::aabbox3d<f32> Box;
	u32 LastTime;
};

} // scene
} // irr

#endif