Hello,
I^m new here , so I bought yesterday the licence for CorelCad 2018 .
Im trying to draw an 3d object.
I tride the simplyest way i draw a rectangle and then i wanted to extrude it but i receve every time this measge : Unable to extrude the selected entity.
I aslo tried to draw an solid Box but after i started i couldent see anithing on my display. Could be something from settings?
There is extrude face, which only works on a 3D face, and extrude, which works on closed 2D spaces. If you draw a box, then click on it, then click solids-draw-extrude, that should do it. you can also just type in extrude and press enter. After that, you can give it a Z-height to extrude to, or drag it with the mouse. Don't forget to select a 3D quartering view to best see it extrude. I suspect you're selecting the wrong extrude command. Or you've drawn a non-closed rectangle with polylines ( there's a bug in 2018 that results in this outcome when you try to extrude ). If you draw a rectangle or other polyline shape, don't manually close it by clicking on the starting point - When you've ready to close it, just hit the "C" key and let CorelCAD close it. This bug is new to 2018... There is a workaround, but easier to remember to close things with the command than manually.
The easiest object to draw and extrude is a cylinder. Make sure you have the 2018.5 update ( download if you don't ) and draw two cylinders in the same space, one smaller than the other diameter wise and make a tube with extrude and subtract. Once you get that far, the rest of the commands make a lot more sense. That little bit doesn't seem like much, but it took me hours to work out when I started... On the second day, I made a complex design, but the first day was just figuring out how to make two shapes and do Boolean operations on them properly.
Make sure you don't have another effect already applied e.g. drop shadow or other. Is so, break the graphic apart and then apply the extrusion
Okay I am ready to close it. I have many nodes and "C" key does nothing. I do know that if an object has square nodes I can extrude it but if it has a round node it can not be extruded. I have had 4 objects, identical, and tried to close them. Half closed the other other half did not by welding. I can not weld anymore and it does not want to extrude.
C-Key only works when closing a polyline object in a single drawing. If you're using lots of curves, that means you're probably using a few operations.
There's three ways I've found to work with that.
1. Convert everything back to polylines with PEDIT and then reweld. Sometimes this works.
2. Redraw all the main parts again from scratch. Sometimes this works and allows you to quickly redo a shape since you're only retracing the outline.
3. In cases where 1 & 2 don't work, I find I can draw a circle around a curve, and draw circles for each curve, and straight boxes for the rest in a single operation. Then I extrude all shapes and use operators to add/subtract/XOR etc until I have the 3D shape. This is a slow, time consuming work around, but I have never had this method fail. Sometimes I have to create quite a few shapes to do what I want, but it always works. Generally I do this in another document using the damaged shape as a base drawing for the new one, created out of other basic, but already closed, shapes.
Also, make sure you have ALL the updates installed. Sometimes there are bugs in first-release versions that are quickly fixed, but unless you go looking for the new update, it doesn't tell you there's one there.
David