left l2
down l1
right l1
up l2
back l1
down l1
forward l2
left l1
back l1
right l2
up l1
left l1
down l2
forward l1
up l1
back l2
right l1
The SGI logo is generated as follows:
Given two lengths l1 and l2, the "turtle graphics" instructions
along with the resulting wire frame result are given below.
In what follows, left and right refer to moving towards the negative
numbers or positive numbers respectively. Up and down is movement along
the z axis, back and forward refer to the y axis.
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forward l1 left l2 down l1 right l1 up l2 back l1 down l1 forward l2 left l1 back l1 right l2 up l1 left l1 down l2 forward l1 up l1 back l2 right l1 |
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In the example above l1 = 1 and l2 = 0.7
Turning the line segments into cylinder/sphere pairs is shown below with its geometric description in Radiance
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s cylinder cyl 0 0 7 -0.5 -0.5 0.5 0.5 -0.5 0.5 0.13 s cylinder cyl 0 0 7 0.5 -0.5 0.5 0.5 0.5 0.5 0.13 s cylinder cyl 0 0 7 -0.2 -0.8 -0.8 -0.2 0.2 -0.8 0.13 s cylinder cyl 0 0 7 -0.2 0.2 -0.8 0.8 0.2 -0.8 0.13 s cylinder cyl 0 0 7 0.8 0.2 -0.8 0.8 -0.5 -0.8 0.13 s cylinder cyl 0 0 7 0.8 -0.5 -0.8 0.8 -0.5 0.2 0.13 s cylinder cyl 0 0 7 0.8 -0.5 0.2 0.8 0.5 0.2 0.13 s cylinder cyl 0 0 7 0.8 0.5 0.2 0.8 0.5 -0.5 0.13 s cylinder cyl 0 0 7 0.8 0.5 -0.5 -0.2 0.5 -0.5 0.13 s cylinder cyl 0 0 7 -0.2 0.5 -0.5 -0.2 0.5 0.5 0.13 s cylinder cyl 0 0 7 0.5 0.5 0.5 -0.2 0.5 0.5 0.13 s cylinder cyl 0 0 7 -0.5 -0.5 0.5 -0.5 0.2 0.5 0.13 s cylinder cyl 0 0 7 -0.5 0.2 0.5 -0.5 0.2 -0.5 0.13 s cylinder cyl 0 0 7 -0.5 0.2 -0.5 -0.5 -0.8 -0.5 0.13 s cylinder cyl 0 0 7 -0.5 -0.8 -0.5 -0.5 -0.8 0.2 0.13 s cylinder cyl 0 0 7 -0.5 -0.8 0.2 0.5 -0.8 0.2 0.13 s cylinder cyl 0 0 7 0.5 -0.8 0.2 0.5 -0.8 -0.8 0.13 s cylinder cyl 0 0 7 0.5 -0.8 -0.8 -0.2 -0.8 -0.8 0.13 s sphere sph 0 0 4 -0.5 -0.5 0.5 0.13 s sphere sph 0 0 4 0.5 -0.5 0.5 0.13 s sphere sph 0 0 4 0.5 0.5 0.5 0.13 s sphere sph 0 0 4 -0.2 0.2 -0.8 0.13 s sphere sph 0 0 4 0.8 0.2 -0.8 0.13 s sphere sph 0 0 4 0.8 -0.5 -0.8 0.13 s sphere sph 0 0 4 0.8 -0.5 0.2 0.13 s sphere sph 0 0 4 0.8 0.5 0.2 0.13 s sphere sph 0 0 4 0.8 0.5 -0.5 0.13 s sphere sph 0 0 4 -0.2 0.5 -0.5 0.13 s sphere sph 0 0 4 -0.2 0.5 0.5 0.13 s sphere sph 0 0 4 -0.2 0.5 0.5 0.13 s sphere sph 0 0 4 -0.5 0.2 0.5 0.13 s sphere sph 0 0 4 -0.5 0.2 -0.5 0.13 s sphere sph 0 0 4 -0.5 -0.8 -0.5 0.13 s sphere sph 0 0 4 -0.5 -0.8 0.2 0.13 s sphere sph 0 0 4 0.5 -0.8 0.2 0.13 s sphere sph 0 0 4 0.5 -0.8 -0.8 0.13 s sphere sph 0 0 4 -0.2 -0.8 -0.8 0.13 |
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