D3DMATH.H

/*========================================================================== 
 * 
 *  Copyright (C) 1995, 1996 Microsoft Corporation. All Rights Reserved. 
 * 
 *  File: d3dmath.h 
 * 
 ***************************************************************************/ 
#ifndef __D3DMATH_H__ 
#define __D3DMATH_H__ 
 
#include <math.h> 
 
#ifdef __cplusplus 
extern "C" { 
#endif 
/* 
 * Normalises the vector v 
 */ 
LPD3DVECTOR D3DVECTORNormalise(LPD3DVECTOR v); 
 
/* 
 * Calculates cross product of a and b. 
 */ 
LPD3DVECTOR D3DVECTORCrossProduct(LPD3DVECTOR lpd, LPD3DVECTOR lpa, LPD3DVECTOR lpb); 
 
/* 
 * lpDst = lpSrc1 * lpSrc2 
 * lpDst can be equal to lpSrc1 or lpSrc2 
 */ 
LPD3DMATRIX MultiplyD3DMATRIX(LPD3DMATRIX lpDst, LPD3DMATRIX lpSrc1,  
                              LPD3DMATRIX lpSrc2); 
/* 
 * -1 d = a 
 */ 
LPD3DMATRIX D3DMATRIXInvert(LPD3DMATRIX d, LPD3DMATRIX a); 
 
/* 
 * Set the rotation part of a matrix such that the vector lpD is the new 
 * z-axis and lpU is the new y-axis. 
 */ 
LPD3DMATRIX D3DMATRIXSetRotation(LPD3DMATRIX lpM, LPD3DVECTOR lpD, LPD3DVECTOR lpU); 
 
/* 
 * Calculates a point along a B-Spline curve defined by four points. p 
 * n output, contain the point. t Position 
 * along the curve between p2 and p3.  This position is a float between 0 
 * and 1. p1, p2, p3, p4    Points defining spline curve. p, at parameter 
 * t along the spline curve 
 */ 
void spline(LPD3DVECTOR p, float t, LPD3DVECTOR p1, LPD3DVECTOR p2, 
            LPD3DVECTOR p3, LPD3DVECTOR p4); 
 
#ifdef __cplusplus 
}; 
#endif 
 
#endif // __D3DMATH_H__