贝塞尔点.doc

贝塞尔点 #include StdAfx.h #include Mathaide.h #include math.h //构造函数 CMathAide::CMathAide(void) { } //析构函数 CMathAide::~CMathAide(void) { } //计算阶乘 LONG CMathAide::Factorial(int nNumber) { int nFactorial=1; int nTemp=nNumber; for(int nIndex=0; nIndexnNumber; nIndex++) { nFactorial*=nTemp; nTemp--; } return nFactorial; } //计算组合 LONG CMathAide::Combination(int nCount,int nR) { LONG lResult; lResult=Factorial(nCount)/((Factorial(nR))*Factorial(nCount-nR)); return lResult; } //计算距离 LONG CMathAide::CalcDistance(int nX1, int nY1, int nX2, int nY2) { LONG lSqure=(nX1-nX2)*(nX1-nX2)+(nY1-nY2)*(nY1-nY2); float fTmpValue=sqrt(float(lSqure)); return LONG(fTmpValue); } //建立直线 void CMathAide::BuildLinear(int nInitX[], int nInitY[], int nInitCount, POINT ptLinear[], int nBuffertCount, WORD nLinearCount, int nDistance, CRect rcBound) { //设置变量 nLinearCount=0; //合法判断 if (nInitCount2) return ; if (nDistance=0) return ; //计算角度 LONG lDisTotal=CalcDistance(nInitX[nInitCount-1],nInitY[nInitCount-1],nInitX[0],nInitY[0]); if (lDisTotal=0) return; float fCos=(labs(nInitY[nInitCount-1]-nInitY[0])*1.f)/lDisTotal; float fAngle=float(acos(double(fCos))); //计算坐标 nLinearCount=1; ptLinear[0].x=nInitX[0]; ptLinear[0].y=nInitY[0]; LONG lDis=0; float fTmpValue=0.f; while (lDislDisTotal nLinearCountnBuffertCount) { if (nInitX[nInitCount-1]nInitX[0]) fTmpValue=ptLinear[0].x-sin(fAngle)*(nDistance*nLinearCount); else fTmpValue=ptLinear[0].x+sin(fAngle)*(nDistance*nLinearCount); if (LONG(fTmpValue)=rcBound.right || LONG(fTmpValue)=rcBound.left) break; ptLinear[nLinearCount].x=LONG(fTmpValue); if (nInitY[nInitCount-1]nInitY[0]) fTmpValue=ptLinear[0].y-cos(fAngle)*(nDistance*nLinearCount); else fTmpValue=ptLinear[0].y+cos(fAngle)*(nDistance*nLinearCount); if (LONG(fTmpValue)=rcBound.bottom || LONG(fTmpValue)=rcBound.top) break; ptLinear[nLinearCount].y=LONG(fTmpValue); ++nLinearCount; lDis=CalcDistance(ptLinear[nLi