//-----------------------------------------------------------------------------
// Shield implementation.
//-----------------------------------------------------------------------------

#include "NetWars.h"

//-----------------------------------------------------------------------------
// The Shield class constructor.
//-----------------------------------------------------------------------------
Shield::Shield( float x, float y, float radius ) 
{	

	m_objectType = "Shield";

	m_shieldRadius = 10.0f;
	m_weaponRadius = 3.0f;

	UpdateShieldRadius( radius );
}

//-----------------------------------------------------------------------------
// The Shield UpdateShieldRadius creates the vetex buffer with 
// the vertexes for the defined radius. 
//-----------------------------------------------------------------------------
void Shield::UpdateShieldRadius( float radius )
{

	static float shortDist = 0.5f;
	static float longDist = 0.866f;
	m_radius = radius;

	simplevertex vertices[] =
	{
		{ 1.0f * m_radius, 0.0f, 0.0f }, 
		{ longDist * m_radius, shortDist * m_radius, 0.0f, },
		{ shortDist * m_radius, longDist * m_radius, 0.0f, }, 
		{ 0.0f,  1.0f * m_radius, 0.0f, }, 
		{ -shortDist * m_radius, longDist * m_radius, 0.0f }, 
		{ -longDist * m_radius, shortDist * m_radius, 0.0f, },
		{ -1.0f * m_radius, 0.0f, 0.0f }, 
		{ -longDist * m_radius, -shortDist * m_radius, 0.0f, },
		{ -shortDist * m_radius, -longDist * m_radius, 0.0f, }, 
		{ 0.0f, -1.0f * m_radius, 0.0f }, 
		{ shortDist * m_radius, -longDist * m_radius, 0.0f, },
		{ longDist * m_radius, -shortDist * m_radius, 0.0f, }, 
		{ 1.0f * m_radius, 0.0f, 0.0f },
	};


	int numberOfVerticies = (int) sizeof( vertices ) / sizeof( simplevertex );
	CreateVertexBuffer( vertices, numberOfVerticies );

	//m_shieldRadius = 10.0f;

}

//-----------------------------------------------------------------------------
// The Shield Method that creates the Physical body.
//-----------------------------------------------------------------------------
void Shield::SetUpPhysics( float x, float y )
{
	// The Shield's Physics are not set up yet.
	m_physicalBody = false;
}

//-----------------------------------------------------------------------------
// The SpaceShip Method that creates the Shield Weapon Body.
//-----------------------------------------------------------------------------
void Shield::Fire( float x, float y, float angle )
{
	UpdateShieldRadius( m_weaponRadius );
	SetUpWeaponBody( x, y );
	m_Body->SetLinearVelocity( 10000.0f * b2Vec2( -cos(angle), sin(angle)));

}

//-----------------------------------------------------------------------------
// The SpaceShip Method that re-attaches the Shield Body to the ship.
//-----------------------------------------------------------------------------
void Shield::Attach( )
{
	UpdateShieldRadius( m_shieldRadius );
	DestroyWeaponBody( );
}

//-----------------------------------------------------------------------------
// The SpaceShip Method that creates the Shield Weapon Body.
//-----------------------------------------------------------------------------
void Shield::DestroyWeaponBody(  )
{
	g_Engine->GetB2D()->RemoveBody( m_Body );
}

//-----------------------------------------------------------------------------
// The SpaceShip Method that creates the Shield Weapon Body.
//-----------------------------------------------------------------------------
void Shield::SetUpWeaponBody( float x, float y )
{
	// Set up the b2D Body Def:
	b2BodyDef bodyDef;
	bodyDef.position.Set(-x, y);
	bodyDef.allowSleep = false;
	
	// Set up the b2D Body Def:
	b2CircleDef circleDef;
	circleDef.radius = 3.0f;
	circleDef.density = 1.0f;
	circleDef.friction = 0.0f;
	circleDef.restitution = 1.0f;

	g_Engine->GetB2D()->AddBody( &m_Body, &bodyDef, &circleDef );

	m_physicalBody = true;
}