Extrude again

I created another example with extrude, here is every face extruded once with a random length x=[1 .. 1.78]. The initial primitive is an icosahedron subdivided once.

Extrude

I have started to work on face extrude. In the example provided there is an icosahedron with one random face extruded 8 times with extrusion-length 1 and tilt vector {1.1, 1.5, 1.0}. I will add support for growing and shrinking extrusion.

Vertex displacement

Today I have implemented a vertex displacer for generative modeling.

For this example I have created a octahedron with size 8 which is subdivided once. One fourth of the vertices are selected and translated 0.9 in y direction. The model is subdivided one more time and 1/32 of the vertices are selected and translated 2.9 in x direction. Then the model is subdivided three more times and the result looks like this.

Anyways

I made a screenshot anyway. “t7.0s1.1s1.3s-1.1sss”

Design and report writing

The last days I have been spending on meetings here at the company, but I have managed to do some work with the report, because Frank have sent me some good comments.

I have investigated some tools for modeling, and seen that it might be good with a vertex selector and a possibility to transform these selected vertices. A face selector with the possibility to extrude should be really nice as well.

No fuzzy screenshots this time.

Smoothness

It is now possible to variate the smoothness in subdivision. By providing the subdivision with an extreme value for smoothing some interesting results can be obtained. Default is 1.0 that applies normal smoothing to the vertex displacement in subdivision.

An example is created: “o8.0s1.4s1.8ss” An octahedron which is subdivided with parameters 1.4 and 1.8 the two first passes and 1.0 the two last passes. The result is depicted as well.

Corkscrew

Corkscrew, generated with the L-system
0.7
1.7
5
25
L
1
L
LF+F+FL
1
L
F

Subdivided three times. Final size is 3411KB.

Another generated model

L-system generated with:

0.5
0.7
4
15
L
2
L
L/R+
R
L+FR
2
L
F
R
F


Generated algebra

It is now possible to generate an algebra from a grammar: For example this grammar
5
45
L
2
L
L\RFF++F
R
RFL//F^RL
2
R
F
L
F

Generates the algebra:
FFFF++FFFF//F^FFFFF//F^FFFFFF++FFFF//F^FFFFFF++FFFF//F^FFFFFF++FFFF//F^FFFFFF++FFFFF++FFFF//F^FFFFF//F^FFFFFF++FFFF//F^FFFFFF++FFFFF++FFFF//F^FFFFF//F^FFFFFF++FFFF//F^FFFFFF++FFFFF++FFFF//F^FFFFF//F^FFFFFF++FFFF//F^FFFFFF++FFFFF++FFFF//F^FFFFFF++FFFF//F^FFFFF//F^FFFFFF++FFFF//F^FFFFFF++FFFF//F^FFFFFF++FFFF//F^FFFFFF++FFFFF++FFFF//F^FFFFF//F^FFFFFF++FFFF//F^FFFFFF++FFFFF++FFFF//F^FFFFFF++FFFF//F^FFFFF//F^FFFFFF++FFFF//F^FFFFFF++F

Which generates a model which subdivided once has the size 1720.16KB

Turtle algebra

Turtle algebra for 3d L-system is now done. This is the model “F1.0+1.7F1.0^0.1-0.1F1.0\1.0F3.0\6.0F0.1//1.0F0.5″ subdivided a few times.