Biplab

Yes, we have tapered extrude along path in our future plans. So is the split screen. Thanks.

Thanks for the feedback.

You can add the surfaces to create a solid using Add Solids command. But you cannot create a single surface out of the two surfaces as they do not have geometric continuity at the boundary of the first surface where they join. Incidentally, to be more precise you could extract the curves out of the boundaries of the first surface and compose them into a single NURBS curve and use that for trimming.

The NURBS surfaces are represented by control vertices - these are the points you see when you invoke the 3D reshape tool or when you check the show vertices checkbox in the OI Palette. The surface geometry may or may not (most cases) pass thru these vertices. The weight at a vertex is a way to pull the surface geometry towards or away from a vertex. If you input any weight between 1-100, it should pull the surface locally more towards that vertex. If you input any weight between .01 - 1, you will essentially push the geometry away from the vertex.

What you are referring to is "thickening" of a surface. We have plans for this command in the future. There is a roundabout way to do this however. You can create a copy and move the copy of the surface in a specified direction. Then join the corresponding ends by drawing NURBS curves. Now extract boundary curves of the surfaces and create Surface from curves from boundary curves and curves joining the ends. Add the surfaces thus created with the original surfaces using Add Solid. Yet another way is this. Create a block such that the surface intersects the block completely i.e. the surface extends beyond the extent of the block. Create a copy of the surface and move it in the specified thickness direction. Now section the block with the two surfaces one after the other keeping the proper side (using Reverse section side from the OI palette). You should be able to get a thickened surface.