Projectionofapoint点的投影Relativepositionoftwopointsonasolid立体上二点的相对位置Identificationandlabelingofcoincidentpoint重影点的判别与标注Exercises练习题O（2）AccordingtocoordinateofpointA,constructprojectiona',a;DrawprojectionofpointD投影在W面上重合时，左遮右(X坐标大的可见)。aa"OYThewidthequality,Yequal.DrawprojectionofpointA已知C点距W面5mm、距V面10mm、距H面10mm,D点距W面15mm、距V面10mm、距H面5mm，求C、D二点的三面投影,并判别其可见性。pointswillbethesamepointandthetwopointsareDrawprojectionofpointB求C点投影RelativepositionsofpointAB(A与B两点的相对位置)DrawprojectionofpointASteps作图步骤：A(20、15、10)；Relativepositionoftwopoints二点的相对位置请点击鼠标左键显示后面内容DrawprojectionofpointA已知各点的坐标,画出点A、B、C、D的三面投影。Drawthethird-viewfromitstwootherviewsshown.aa"OYThewidthequality,Yequal.ProjectionofthepointA空间A点的投影Steps作图步骤：DrawprojectionofpointAIdentificationandlabelingofcoincidentpointExercises练习题即高平齐,Z相等Example2.投影在V面上重合时，前遮后(Y坐标大的可见)。到投影面的距离,画出点A、B、C、D的三面投影。投影在W面上重合时，左遮右(X坐标大的可见)。ConstructthethreeprojectionsofpointsA,B,C,D.Identification判别Drawthethird-viewfromitstwootherviewsshown.已知各点的两个投影，求其第三投影。本小节结束b"(c")2.ConstructthethreeprojectionsofpointsA,B,C,D.fromitscoordinateanddistance.根据所给定的点的坐标或点到投影面的距离，画出点A、B、C、D的三面投影。3.ThepointA(30,15,0).accordingtorequestdrawthethreeprojectionsofpointsA,B,C.已知A点的坐标为(30,15,0)，按下述要求画出点A、B、C的三面投影。projectionsofpointsA,B,C.ThepointA(30,15,0).Drawthethirdviewfromitstwootherviewsshown.WhenprojectedtotheW-Plane,leftcoveringright.ConstructthethreeprojectionsofpointsA,B,C,D.请点击鼠标左键显示后面内容D(10、25、10)。DrawprojectionofpointCThepointA(30,15,0),accordingtorequestdrawthethree（2）Constructprojectionb".按下述要求画出点A、B、C的三面投影。A(20、15、10)；重影点的判别与标注Steps作图步骤：ThepointA(30,15,0).whentwopointsonthesolidareonthesame请点击鼠标左键显示后面内容dc'c'b()