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Sped up HSV() slightly.

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Garth Minette 2021-07-30 13:38:25 -07:00
parent 7e75d03f6a
commit b5e6a08f51
1 changed files with 19 additions and 9 deletions
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28
mutators.scad
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@ -105,7 +105,7 @@ module bounding_box(excess=0, planar=false) {
// a normal vector. The s parameter is needed for the module
// version to control the size of the masking cube, which affects preview display.
// When called as a function, you must supply a vnf, path or region in p. If planar is set to true for the module version the operation
// is performed in and UP and DOWN are treated as equivalent to BACK and FWD respectively.
// is performed in and UP and DOWN are treated as equivalent to BACK and FWD respectively.
//
// Arguments:
// p = path, region or VNF to slice. (Function version)
@ -163,7 +163,7 @@ function half_of(p, v=UP, cp) =
let(
v = (v==UP)? BACK : (v==DOWN)? FWD : v,
cp = is_undef(cp) ? [0,0]
: is_num(cp) ? v*cp
: is_num(cp) ? v*cp
: assert(is_vector(cp,2) || (is_vector(cp,3) && cp.z==0),"Centerpoint must be 2-vector")
cp
)
@ -179,7 +179,7 @@ function half_of(p, v=UP, cp) =
intersection(box,p)
: assert(false, "Input must be a region, path or VNF");
/* This code cut 3d paths but leaves behind connecting line segments
is_path(p) ?
@ -824,13 +824,23 @@ module HSL(h,s=1,l=0.5,a=1) color(HSL(h,s,l),a) children();
// rgb = HSV(h=270,s=0.75,v=0.9);
// color(rgb) cube(60, center=true);
function HSV(h,s=1,v=1) =
assert(s>=0 && s<=1)
assert(v>=0 && v<=1)
let(
h=posmod(h,360),
v2=v*(1-s),
r=lookup(h,[[0,v], [60,v], [120,v2], [240,v2], [300,v], [360,v]]),
g=lookup(h,[[0,v2], [60,v], [180,v], [240,v2], [360,v2]]),
b=lookup(h,[[0,v2], [120,v2], [180,v], [300,v], [360,v2]])
) [r,g,b];
h = posmod(h,360),
c = v * s,
hprime = h/60,
x = c * (1- abs(hprime % 2 - 1)),
rgbprime = hprime <=1 ? [c,x,0]
: hprime <=2 ? [x,c,0]
: hprime <=3 ? [0,c,x]
: hprime <=4 ? [0,x,c]
: hprime <=5 ? [x,0,c]
: hprime <=6 ? [c,0,x]
: [0,0,0],
m=v-c
)
rgbprime+[m,m,m];
module HSV(h,s=1,v=1,a=1) color(HSV(h,s,v),a) children();