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parser:: regangle now works with inf edges

This commit is contained in:
Zeno Rogue 2022-04-23 00:39:44 +02:00
parent 32ff898cd1
commit 3f8e9dde2b
1 changed files with 14 additions and 8 deletions
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22
util.cpp
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@ -279,14 +279,20 @@ cld exp_parser::parse(int prio) {
ld edges = rparse(0);
force_eat(")");
ld alpha = M_PI / edges;
ld c = asin_auto(sin_auto(validate_real(edgelen)/2) / sin(alpha));
hyperpoint h = xpush(c) * spin(M_PI - 2*alpha) * xpush0(c);
ld result = 2 * atan2(h);
if(result < 0) result = -result;
while(result > 2 * M_PI) result -= 2 * M_PI;
if(result > M_PI) result = 2 * M_PI - result;
res = result;
if(isinf(edges)) {
ld u = sqrt(cosh(validate_real(edgelen)) * 2 - 2);
ld a = atan2(1, u/2);
res = 2 * a;
}
else {
ld c = asin_auto(sin_auto(validate_real(edgelen)/2) / sin(alpha));
hyperpoint h = xpush(c) * spin(M_PI - 2*alpha) * xpush0(c);
ld result = 2 * atan2(h);
if(result < 0) result = -result;
while(result > 2 * M_PI) result -= 2 * M_PI;
if(result > M_PI) result = 2 * M_PI - result;
res = result;
}
if (auto *angleunit = hr::at_or_null(extra_params, "angleunit"))
res /= *angleunit;