66 |
|
bound(a,x,b) : if(a-x, a, if(x-b, b, x)); |
67 |
|
Acos(x) : acos(bound(-1,x,1)); |
68 |
|
Asin(x) : asin(bound(-1,x,1)); |
69 |
< |
Exp(x) : if(-x-60, 0, exp(x)); |
69 |
> |
Exp(x) : if(-x-100, 0, exp(x)); |
70 |
|
Sqrt(x) : if(x, sqrt(x), 0); |
71 |
|
|
72 |
|
{ Useful constants } |
91 |
|
|
92 |
|
noop(v) = v; |
93 |
|
clip(v) = bound(0,v,1); |
94 |
< |
noneg(v) = max(0,v); |
95 |
< |
red(r,g,b) = r; |
96 |
< |
green(r,g,b) = g; |
97 |
< |
blue(r,g,b) = b; |
94 |
> |
noneg(v) = if(v,v,0); |
95 |
> |
red(r,g,b) = if(r,r,0); |
96 |
> |
green(r,g,b) = if(g,g,0); |
97 |
> |
blue(r,g,b) = if(b,b,0); |
98 |
|
grey(r,g,b) = .3*r + .59*g + .11*b; |
99 |
|
clip_r(r,g,b) = bound(0,r,1); |
100 |
|
clip_g(r,g,b) = bound(0,g,1); |
135 |
|
|
136 |
|
un2`private(t) : t - (2.515517+t*(.802853+t*.010328))/ |
137 |
|
(1+t*(1.432788+t*(.189269+t*.001308))) ; |
138 |
< |
un1`private(p) : un2`private(sqrt(log(1/p/p))) ; |
138 |
> |
un1`private(p) : un2`private(sqrt(-2*log(p))) ; |
139 |
|
|
140 |
|
unif2norm(p) : if( .5-p, un1`private(p), -un1`private(1-p) ) ; |
141 |
|
|