附件Ⅲ:图4连杆机构动画程序!图4的动画程序SETWINDOW-22,58,-35,23！窗口的长宽比应该与屏幕窗口的一样，大约为4：3，这样画出来的图形才不会变形。OPTIONNOLETW1=10：XE=0：YE=0：XB=41：YB=0：XF=0：YF=-34：LED=14LDA=39：LBA=28：ADC=35：LDC=15：LFG=55：R=0.5FORI=0TO3600STEP2！准备转10圈，原动件每次转2度。CALLLINK(XE,YE,0,0,0,0,I*PI/180,W1,0,LED,XD,YD,VDX,VDY,ADX,ADY)CALLRRR(XD,YD,VDX,VDY,ADX,ADY,XB,YB,0,0,0,0,LDA,LBA,QDA,W3,E3,QBA,W2,E2)CALLLINK(XD,YD,VDX,VDY,ADX,ADY,QDA,W3,E3,LDA,XA,YA,VAX,VAY,AAX,AAY)！为了画动画，必须求出A点坐标QDC=QDA+ADC*PI/180CALLLINK(XD,YD,VDX,VDY,ADX,ADY,QDC,W3,E3,LDC,XC,YC,VCX,VCY,ACX,ACY)CALLRPR(0,XF,YF,0,0,0,0,XC,YC,VCX,VCY,ACX,ACY,0,QFG,W4,E4)CALLLINK(XF,YF,0,0,0,0,QFG,W4,E4,LFG,XG,YG,VGX,VGY,AGX,AGY)CLEAR!清屏幕PLOTXE,YE;XD,YD;XA,YA;XB,YB!画折线EDABPLOTXD,YD;XC,YC;XA,YA!画折线DCAPLOTXF,YF;XG,YG!画折线FGBOXCIRCLE-R,R,-R,R!在Xmin=-R,Xmax=R,Ymin=-R,Ymax=R的矩形内画椭圆,即:以(0,0)为圆心,以R为半径画圆(转动副)PLOTTEXT,ATXE+1,YE:"E"!在E处写字符EBOXCIRCLEXD-R,XD+R,YD-R,YD+R!在Xmin=XD-R,Xmax=XD+R,Ymin=YD-R,Ymax=YD+R的矩形内画椭圆,即:以(XD,YD)为圆心,以R为半径画圆.PLOTTEXT,ATXD+1,YD:"D"!在D处写字符DBOXCIRCLEXA-R,XA+R,YA-R,YA+RPLOTTEXT,ATXA+1,YA:"A"BOXCIRCLEXB-R,XB+R,YB-R,YB+RPLOTTEXT,ATXB+1,YB:"B"BOXCIRCLEXF-R,XF+R,YF-R,YF+RPLOTTEXT,ATXF+1,YF:"F"BOXCIRCLEXC-R,XC+R,YC-R,YC+RPLOTTEXT,ATXC+1,YC:"C"PLOTTEXT,ATXG+1,YG:"G"PAUSE0.2!画完每幅图后,暂停0.2秒.NEXTIENDSUBLINK(XA,YA,VAX,VAY,AAX,AAY,QAB,W,E,L,XB,YB,VBX,VBY,ABX,ABY)XB=XA+L*COS(QAB)YB=YA+L*SIN(QAB)VBX=VAX-L*SIN(QAB)*WVBY=VAY+L*COS(QAB)*WABX=AAX-L*COS(QAB)*W^2-L*SIN(QAB)*EABY=AAY-L*SIN(QAB)*W^2+L*COS(QAB)*EENDSUBSUBRRR(XA,YA,VAX,VAY,AAX,AAY,XC,YC,VCX,VCY,ACX,ACY,LAB,LCB,QAB,WAB,EAB,QCB,WCB,ECB)LAC=SQR((XC-XA)^2+(YC-YA)^2)COSQAC=(XC-XA)/LACSINQAC=(YC-YA)/LACQAC=ANGLE(COSQAC,SINQAC)COSQCBA=(LAB^2+LAC^2-LCB^2)/(2*LAB*LAC)SINQCBA=SQR(1-COSQCBA^2)QCBA=ANGLE(COSQCBA,SINQCBA)QAB=QAC-QCBAXB=XA+LAB*COS(QAB)YB=YA+LAB*SIN(QAB)COSQCB=(XB-XC)/LCBSINQCB=(YB-YC)/LCBQCB=ANGLE(COSQCB,SINQCB)WAB=((VAX-VCX)*COSQCB+(VAY-VCY)*SINQCB)/LAB/SIN(QAB-QCB)WCB=((VAX-VCX)*COS(QAB)+(VAY-VCY)*SIN(QAB))/LCB/SIN(QAB-QCB)G=AAX-ACX-LAB*COS(QAB)*WAB^2+LCB*COSQCB*WCB^2F=AAY-ACY-LAB*SIN(QAB)*WAB^2+LCB*SINQCB*WCB^2EAB=(G*COSQCB+F*SINQCB)/LAB/SIN(QAB-QCB)ECB=(G*COS(QAB)+F*SIN(QAB))/LCB/SIN(QAB-QCB)ENDSUBSUBRPR(M,XA,YA,VAX,VAY,AAX,AAY,XC,YC,VCX,VCY,ACX,ACY,LAB,QBD,W,E)LAC=SQR((XC-XA)^2+(YC-YA)^2)COSQAC=(XC-XA)/LACSINQAC=(YC-YA)/LACQAC=ANGLE(COSQAC,SINQAC)LBC=SQR(LAC^2-LAB^2)QACB=ATN(LAB/LBC)QBD=QAC+M*QACBDELTA=-(YC-YA)*SIN(QBD)-(XC-XA)*COS(QBD)DELTAW=(VCX-VAX)*SIN(QBD)-(VCY-VAY)*COS(QBD)DELTAV=-(YC-YA)*(VCY-VAY)-(XC-XA)*(VCX-VAX)W=DELTAW/DELTAVLBC=DELTAV/DELTAT1=(ACX-AAX)+(VCY-VAY)*W+SIN(QBD)*W*VLBCT2=(ACY-AAY)-(VCX-VAX)*W-COS(QBD)*W*VLBCDELTAE=T1*SIN(QBD)-T2*COS(QBD)E=DELTAE/DELTAENDSUB
