Aula 2

 Starting the class by continuing the work made on the end of last class that is basicly create an Octagon.
Using the comands learned on last class -3DARRAY- to rotate the single triangle made using the -3DPOLY- et voilá, we get the pyramid shape we want. -MIRROR- it and its finished.
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The next step is doing a ''decaedro'', wich is a result on 5 pentagon faces.
We find the intersections of the circles in order to rotate the outter faces up in order to place them to face them correctly. After, we can just -3DARRAY- them to arrange in order. Next we should mirror everything that we privously made on the XY plane and align the convalent points to merge the two poles of the shape.
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The next shape is a ...edron, it has the same form but is made by triangles instead of a pentagon.
We start by designing a pentagon and, from there, at each segment of the shape draw another -POLYGON- with 3 lines ( triangle ) inscripted on the outlines of the pentagon. Again, draw a circle upwards on the UCS, draw a vertical line in the center of the original pentagon in order to create the top part of the ...edron. -3DARRAY- it and we get the shape we want.
Afterward we can erase 1 face from the top in order to create a -ARRAYCLASSIC- to create the other regions of the solid.
with that done we can visualise where this other pyramids are going to sit on and we can do a series of POLYGONS w 5 sides placed on the lines to make the ''chair'' of the pyramids.
Find the center spots of those pentagons and array a face of the pyramid acording to the center spot and we get it. -MIRROR- the top side to the bottom and from that we can just -3DPOLY- all the missing faces of the ... edron.
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To do the cone section, first we create a simple cone and mirror it orthogonaly.
The sections will be a -circle-, -elypse-, -hyperbole-, -parabole-.
To do it we got to work on the -SECTION- functions and points so we can arrange every type of section we chose to make.