Thiết kế flash - Auxiliary views

Auxiliary ViewsMotivationOne view of the surface seen on edgeTwo views seen as a foreshortened (i.e., not true size) surface Multiview drawing set of an inclined surface shows: Sometimes need a view of inclined surface that shows its true size and shape From Descriptive GeometryLine of sight is normal to the face, or, equivalently,View plane is parallel to the face True size and shape of a planar face (or true length of a line) can only be represented in an orthographic projection if:DefinitionsAn auxiliary view is an orthographic view that is projected onto any plane other than one of the principal planesA primary auxiliary view is an auxiliary view projected from one of the six principal viewsUsed to find true size of an inclined surfaceA secondary auxiliary view is a view projected from a primary auxiliary viewUsed to find true size of an oblique surfaceAuxiliary View Projection Theory - 1Object with inclined surface placed inside glass boxAdditional plane added to glass box - parallel to inclined surfaceInclined surface projected onto inclined plane Auxiliary View Projection Theory - 2Inclined projection plane hinged to principal projection plane (Horizontal, Frontal, Profile) that shows inclined surface as an edgeAuxiliary View Projection Theory - 3Views unfolded - auxiliary view shows true size and shape of inclined surface Distance from hinge to edge of inclined surface same for all views, principal or auxiliary Convention is to only show inclined surface in an auxiliary viewAuxiliary Views: 3 CasesDepending upon where the inclined surface appears on edge, primary auxiliary views can be projected from either the:Horizontal PlaneFrontal PlaneProfile PlaneAuxiliary ViewsOver and Out