thanks alot visose for sharing the mathsurfaces stuff. there are a lot more formulas in explicit polar coordinates within the k3dsurf package. you can just paste and copy them into grasshopper mathsurfaces. also the klein bottle works :)
X():(3*(1+sin(v)) + 2*(1-cos(v)/2)*cos(u))*cos(v) Y():(4+2*(1-cos(v)/2)*cos(u))*sin(v) Z():-2*(1-cos(v)/2) * sin(u) [u]:0, 2*pi [v]:0, 2*pi http://k3dsurf.sourceforge.net/ this leads me to another question: the k3dsurf package contents also isosurfaces in cartesian coordinates F(x,y,z,t....)=0 e.g. the Schwartz surface: cos(x)+cos(y)+cos(z)=0; x,y,z=(-4,4) does anyone know how to set up mathsurfaces in this format? -rpict
