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Basic 3D Question
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* January 28, 2016, 05:15:19 AM
In general 3D operation:  Is the common practice to create blocks in the isometric view,
and then drag them around in the Front, Right, and World Plan views until they all agree?
Or do you set a zero point in the Isometric view and draw all the objects relative to it (the zero point)?

( While Turbocad allows dragging, it seems to be predisposed to relocate objects
  through the values entered in the positioning X, Y, & Z boxes at the bottom of the screen. )

Any daylight is appreciated.



* January 28, 2016, 11:23:12 AM
No.  There's  very little dragging anything around in feature-based or parametric CAD.  In TC, shift + tab puts you in the coordinate boxes, where you enter the exact coordinate that you want to place a point, or a line end, or a circle's centre or perimeter marker.  Then you add things relative to the objects that you've placed before.   Even dragging points and faces around as you do in freeform modeling like TC's subdivision modeling capability isn't moving objects around, it's moving features relative to a base object.  CAD programs have snaps, which is the provision to move objects by explicitly describing "this feature of this object is going to be attached to this other feature in the drawing or model" and makes those features "magnetic" or  indexed to each other for that action.  Isometric view and ortho views are traditional views that exist so that people looking at paper drawing sheets would know what angle they're looking at objects from, but they're not so relevant in CAD until you need to set out paperspaces to create sheets.   Working in the computer's model space, you can look at the model from any angle at any zoom, with nothing obscured.  People who're migrating from drawing boards or who're familiar with iso and ortho views often use them in the workspace because they feel more comfortable with them, but they're not obligatory or necessary when you're comfortable with spatial orientation on-screen.   They're just agreed viewpoints for when you're looking at something with other people. 
There's no predisposition for the program to relocate anything, and there are a multitude of ways to reorient objects.