[Bf-funboard] Suggested list of precision modeling tools

[Karl Kühberger]

1+


2013/5/11 Raindrops From Sky <raindrops.fromsky at gmail.com>

> Here is a list of precision modeling tools.
>
> 1. Draw a line that passes through a point in 3D space, and constrain it to
> be parallel to another line in 3D space.
> 2. Draw a line that passes through a point in 3D space, and constrain it to
> be parallel to a plane in 3D space.
> 3. Draw a line that passes through a point in 3D space, and ends on any
> point that is on plane in 3D space.
> 4. Draw a line that passes through a point in 3D space, and constrain it to
> be perpendicular to a line.
> 5. Draw a line that passes through a point in 3D space, and constrain it to
> be perpendicular to a plane.
> 6. Extend a line till it “locks” on another point in 3D space.
>     (i.e., when its end-point has one or two coordinates common with the
> reference point).
> 7. Extend a line beyond its end-point by x units.
> 8. Extend two lines till they meet (to form a V joint).
> 9. Shorten a line by moving its end-point by x units.
> 10. If we are given a face, extend a plane from it.
> 11. Draw an arc that passes from three given points in 3D space.
> 12. Draw an arc that passes through two points and with a given diameter.
>
> I don't know if Blender would allow some of these features, because they
> are based on SketchUp and SweetHome 3D) where the design philosophy is
> quite different (since they do not have distinct Object and Edit modes; so
> they are able to make use of vertices and edges from any object in the
> scene; which is not the case in Blender.).
>
> There are some other features worth emulating also:
>
> 1.  When we move the mouse in SketchUp, it continuously looks for
> inferences to surrounding vertices/edges/planes/objects. When the mouse
> finds an alignment, it is displayed instantly with two different methods:
>
>     (a) A dot with different shapes+colors appears at the mouse pointer
> when it reaches specific points.
>           For example-
>           * it will display a green circle for end-points or mid-points on
> a edge,
>           * It will display a red square for any other point on an edge;
> and
>           * It will display an indigo diamond for point on face.
>
>           Without such facility, we have to build a lot of temporary
> geometry to achieve the same result.
>
>      (b) When the mouse pointer sligns with any vertex in the scene, a
> dotted line of appropriate color (Red/Green/Blue)
>            appears between the pointer to that vertex. This inference helps
> build planes, rectangles and boxes.
>
> 2. In the perspective view, the pointer carries a set of three
> red/green/blue dotted lines (to represent the x, y and z axes).
>           This gives a better idea of the pointer's true position in 3D
> space.
>
> 3. A PENCIl TOOL that is able to draw lines in 3D space using geometry from
> all objects in the scene.
>     Currently the knife tool has this functionality, but within a given
> object. This is a major limitation.
>     Another limitation is it can divide an existing geometry, but cannot
> create new geometry in space.
>
> All these mechanisms will allow us to speed model mechanical objects with
> precision.
>
> It would be great to have such features for mechanical shapes
> (engineering/archviz projects).
>
> Could be included in GSOC 2013.
>
> *If any of the items are not clear, I can send a simulation/video to
> explain.
>
>
> *
> *Regards,
> Narayan
> *
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