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1、化学工程与工艺专业制图-点线面投影（Chemicalengineeringandtechnologyprofessionalgraphics-pointprojection）ThisarticlecontributesbywanderinginwinterPptdocumentsmayexperiencepoorbrowsingontheWAPside.ItisrecommendedthatyoufirstselectTXT,ordownloadthesourcefiletothelocalview.3.pointline.3.point.Line.P
2、laneprojectionTheprojectionof3.1points,theprojectionof3.2lines,andtheprojectionof3.3planesReturnProjectionsof3and1pointsPoints,lines,planesarethebasicgeometricelementsthatformthebody,APointDBCTheintersectionlineofthreeplaneprojectionprojectionthreeplaneprojectionpointthreeplanep
3、rojectionpointthreeplaneprojectionpoint3.1.13.1.1pointinthespaceofAprojectionlinespacepointsandtheprojectionsurfacePisthepointofintersectionistheintersectionpointofAandprojectionistheprojectionpointonthesurface.ProjectiononthePsurface.Projectiononsurface,P,PAA'BB1B2B'Theprojecti
4、onofapointonaprojectionsurfacecannotdeterminethespatialpositionofthepoint.Thespatiallocationofthepointscannotbedetermined.TermsofsettlementPolyhedralprojection.Polyhedralprojection.Theprojectionofthethreesidesoftheprojectionpointonthethreesurfaceofa3.1.1pointProjectionplaneandpr
5、ojectionaxisZVVsurfaceandsurfaceintersectionsurfaceandHsurfaceintersectionsurfaceandsurfaceintersectionofOXaxisHsurfaceandsurfacesurfaceintersectionandWsurfaceintersectionsurfaceandsurfaceintersectionofOYaxisVsurfaceandsurfacesurfaceintersectionandWsurfaceintersectionsurfaceands
6、urfaceintersectionofOZaxisXOYThreeplaneprojectionspacethreeplaneprojectionpoint3.1.1andthepositionoftheCartesiancoordinatespacepositionbythespaceposition,theCartesiancoordinatesdetermined,Cartesiancoordinatevaluestodetermine,ingeneralthefollowingform:A(x,y,Z).Form:A(x,y,Z).Thedi
7、stancefrompointtoprojectionsurfaceisthecorrespondingcoordinatevalueX,numericalvalueX,Y,Z.Alpha-spacespacepointApointA;spacepointlevel(H)levelprojectionpointprojectiona-A(V);thepositivefrontprojectionprojectionprojectionofa'-A;thelateralprojection(W).Projection。Sideprojectionofth
8、esidepointofa"-dotA"TheVsurfacedoesnotmoveVa'A,
