port from perforce

evoke-64k/bp10/flockspline.h

@@ -0,0 +1,61 @@
+#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 );