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Yeah, I gotta plead stupid here myself. This is the first time I have ever heard this term. When I do a search for it the only results for images I get are triangles. Is this just another word for a hollow triangle?
I did it by creating 4 datum points with all 4 dimensions equal, (using relations). Then create a prutrusion, a triangle using the 3 base points, and extruding it upto the 4th point. I then made 3 extruded cuts, "sketch plane" is "make datum" through 3 points and the "cross reference plane" is "make datum" through center axis and through the opposite point. Sketch rectangle aligning the bottom vertexes of the rectangle to the lower 2 points and the top of the rectangle to the top point. Extrude "upto" and select the top edge of the original protrusion. The whole part only has4 dimensions. By modifying the first dimension, you can create any size "tetrahedron" that you want
Can be done with a single sweep feature using the add-inner-faces option. THe trajectory will be an equilateral triangle. The section will be a line from the trajectory to the apex of the tetrahedron.
Here it is in a nutshell. Create the 3 default datum planes, then an axis through 2 of the planes, thenadd a sweep with "in faces". The trajectory of the sweep looks like:
I put the question just for discussion and academic purpose. By right way to create tetrahedron I mean the best option out the the many available options.
by now most of you must have arrived at numerous solutions. i have been posing this question and the icecube model problem to my friends and students since my autocad days.
In case of regular geometrical solids always the solid of lower order is the subset of solid of higher order. Therefore the best way of creating a solid regular therahedron (ie a tetrahedron with all edges equal to 'a' and all faces obviously equilateral triangles is to slice a cube approprriately.This way we dont have to calculate the approxc height. you could work on this hint Israr. but your method of using four spheres (one sphere on three) is mathematically more interesting. also using relations is right but,causes problem when exporting model toanother platform.but my proe2001 could not open any of the part models provided. but i would like to know if any one has better solutions.
suraj.
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