#pragma once

#include "defines.h"
#include <d3d9.h> 
#include <d3dx9math.h>

struct Boid
{
	int m_iTimeOffset;
	int m_iLength;
	float m_fRotOffset;
	D3DXVECTOR3 m_RotFunc;
	D3DXVECTOR3 m_DistFunc;
	float m_fWidth;
	float m_fColor;
};

struct Flock
{
	static const int m_iTimeResolution= 128;
	D3DXVECTOR3* m_vecSplineData;
	D3DXVECTOR3* m_vecSplineDataUp;
	D3DXVECTOR3* m_vecSplineDataRight;
	int m_iSplineLength;

	static const int m_iMaxBoidCount= 256;
	Boid m_BoidData[ m_iMaxBoidCount ];
	int m_iBoidCount;
	
	float m_fTimeOffset;
	float m_fMaxTimeAdd;

	float	m_fColorIncrement;
	int		m_iTesselation;

	void Init();

	void GeneratePreSpline(	D3DXVECTOR3* pBase, 
							int iCountpoints,
							float fDistStep,
							float fMaxOffset);
	void GenerateUpVectors();
	void GenerateSplinePoints( int iTicksPerPrePoint );
	void GenerateBoids01( int iCount );
	void GenerateBoids02( int iCount );
	void GenerateBoids03( int iCount );
	void GenerateBoidsText( int iCount );
	bool IsActive( float fTime );
	void AddToScene( float fTime, int iObject );

	static int GenerateSplineBands();

	static void CreateBaseUpVector( D3DXVECTOR3& vec3In, D3DXVECTOR3& vec3Out );
};

static const int g_iFlockCount= 1024;
extern Flock g_Flocks[ g_iFlockCount ];

void PrepareFlockObjects();

void AddFlockObjectsToScene( float fTime );