#local fn_B=function{abs(z)-3/16/2};
#local fn_C=function{abs(y)-.5};
#local N=.25;
#local fn_Smooth=function(x){x*x*x*(10+x*(6*x-15))};
#local fn_twistY=function{z*sin(fn_Smooth(x)*2*pi*N) + y*cos(fn_Smooth(x)*2*pi*N)};
#local fn_twistZ=function{z*cos(fn_Smooth(x)*2*pi*N) - y*sin(fn_Smooth(x)*2*pi*N)};
#local fn_twist_Box=function{max(
fn_A(x-.5),
fn_B(x,fn_twistY(x,y,z),fn_twistZ(x,y,z)),
fn_C(x,fn_twistY(x,y,z),fn_twistZ(x,y,z)))
};
isosurface {
function {
fn_twist_Box(x-.5,y,z)
}
contained_by {box{<.5,-.5,-.5>,<1.5,.5,.5>}}
threshold 0
accuracy 0.001
max_gradient 1.58
max_trace 5
}
Twist_90degree_iso.mdl
#local fn_A=function{sqrt(x*x+ y*y) - 1};
isosurface {
function {
max(
fn_A(x,y,z),
z-f_th(x,z,y)*H/pi,
-fn_A(x*1.5,y*1.5,z)
)
}
contained_by {box{<-1,-1,-1>,<1,1,1>}}
threshold 0
accuracy 0.01
max_gradient 399
max_trace 5
}
Cylindrical_ramp.mdl