Task 4 -

This definition contains 2 parts. The base parametric tower was created following a series of tutorials on Grasshopper3d.com called "Build a parametric Tower" by Jonas Bredel (http://www.grasshopper3d.com/video/video/search?q=build+a+parametric+tower). What this part does is create the base parametric tower; the floor height, number of floors, the size of the floors, the rotation of the building, the movement in the X and Y axis, the scale of the floors and the thickness of the floor slab can be changed via number sliders and graph mappers.
The other part of this definition is the weaving part, created by Alireza Akhoundi on Grasshopper3D.com's discussion boards (http://www.grasshopper3d.com/profiles/blogs/weaving-patern-on-surface), which creates the weaving pattern facade on the tower.

Viewport screen shot of the above definition.

The above definition consist of 2 parts. The base part is Alex Hogrefre's weaving definition (http://www.alexhogrefe.com/generative-weave-grasshopper-r/) which creates 2 sets of "threads" going in the X and Y axis but also causes the at points when the 2 sets of threads intersect to undulate in the Z axis (2 points for X and Y).
The 2nd part of this definition was added by me, based on the example in the Grasshopper Primer 2nd Ed. called "Uneven Surface Diagram". What this part does is to make the distribution of the threads uneven, essential creating an illusion of the threads bee "zoomed" in an out at parts of the surface.

Viewport screen shot of the above definition.