exact formula is inside /lib/skybright.cal if this can help you to find the name.
{ RCSid: $Id$ } { Sky brightness function for sunny and cloudy skies.
Additional arguments required for calculation of skybright:
A1 - 1 for CIE clear, 2 for CIE overcast, 3 for uniform, 4 for CIE intermediate A2 - zenith brightness A3 - ground plane brightness A4 - normalization factor based on sun direction A5,A6,A7 - sun direction }
cosgamma = Dx*A5 + Dy*A6 + Dz*A7;
gamma = Acos(cosgamma); { angle from sun to this point in sky }
zt = Acos(A7); { angle from zenith to sun }
eta = Acos(Dz); { angle from zenith to this point in sky }
wmean(a, x, b, y) : (a*x + b*y) / (a + b);
skybr = wmean((Dz+1.01)^10, select(A1, sunnysky, cloudysky, unifsky, intersky), (Dz+1.01)^-10, A3);
sunnysky = A2 * (.91 + 10*exp(-3*gamma) + .45*cosgamma*cosgamma) * if( Dz - .01, 1.0 - exp(-.32/Dz), 1.0) / A4;
cloudysky = A2 * (1 + 2*Dz)/3;
unifsky = A2;
intersky = A2 * ( (1.35*sin(5.631-3.59*eta)+3.12)*sin(4.396-2.6*zt) + 6.37 - eta ) / 2.326 * exp(gamma*-.563*((2.629-eta)*(1.562-zt)+.812)) / A4;
…
by its own tangent vector on the curve... and this happens to the last item. Here's the algorithm:
B0 ----> B1
B1 ----> B2
B2 ----> B3
B3 ----> B4
...
…
KangaMark Score: 98 PC model: @xi MTower Operating system: Windows 7 PROFESSIONAL Processor model and speed: Intel core i7-x990 @3.47 GHz Amount and speed of RAM: 24 GB DDR3 @ 1333 MHz
rom two surface offsets. I did a merge list to create a pattern from an wavy surface. I obtained several surfaces made of two toggle boolean.
Capture%20d%E2%80%99e%CC%81cran%202016-05-18%20a%CC%80%2016.26.16.png
How can i simplify those surfaces (made of two surfaces)?
Capture%20d%E2%80%99e%CC%81cran%202016-05-18%20a%CC%80%2016.26.38.png
Also, how can i link the two offset surfaces in a closed volume?
Thank you guys!
Best,
Rémy…
If all of the strips are similar to the one in your image, maybe try TT Toolbox's unroll component?
http://www.grasshopper3d.com/video/tt-toolbox-unfold-component ;