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;
…
do it? can someone help me out?
here, i tried listing out all the divided points of the 3 curves to get a list of values to interpolate. but, if i try that, i am able to only list out the points of AB and CD. so, i used two lists to get divided points, first list of AB, CD and second of CD, EF. but, then, how do i join the list and interpolate the curves?…
generations of 50 individuals) of the same model that I got NaN's on before. As far as I can tell, it shouldn't be a division by zero problem, I'm solving the following formula: (a/10*b)-(c*d)-(e*f)-(g*h). I did save the text outcome of the run but I'm not sure which gene is what so I'm not sure how to recreate the exact situation... Is there something you want me to try?
BTW, what is a collision?
cheers,
wim
Genome[24], Fitness=-300.29, Genes [3% · 33% · 98% · 7%]
{
Record: Point Mutation at index 3: 0.0465 -> 0.0497
}
Genome[25], Fitness=NaN, Genes [3% · 33% · 98% · 9%]
{
Record: Genome was mutated to avoid collision…
inal surface, creating buckling.
http://www.grasshopper3d.com/forum/topics/differential-growth-in-curves?id=2985220%3ATopic%3A1313465&page=1#comments
I experimented with many different texture effects. In the end I decided i liked the idea of the outer surface being eroded smooth. With the articulate texture protected within folds.
Full GH (Kangaroo - Meshmachine - Weaverbird - Millipede)…
Added by Nick Tyrer at 5:25am on December 10, 2015
ase to give the same result using a graph mapper with a parabola as in the attached file
Unfortunately it never gave the same result ..... is it a mistake in the book ?!…