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improved matrix parser

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This commit is contained in:
Zeno Rogue 2023-08-09 14:35:47 +02:00
parent f212f6173b
commit fe6d7abec2
1 changed files with 13 additions and 4 deletions
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17
util.cpp
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@ -491,6 +491,7 @@ ld angle_unit(char ch) {
transmatrix exp_parser::parsematrix(int prio) {
skip_white();
transmatrix res;
if(s[at] && s[at+1] && s[at+2] && s[at+3] == '(') {
ld unit = angle_unit(s[at]);
int c0 = coord_id(s[at+1]);
@ -498,12 +499,17 @@ transmatrix exp_parser::parsematrix(int prio) {
if(c0 >= 0 && c1 >= 0 && c0 != c1 && unit) {
at += 4;
ld angle = validate_real(parsepar());
if(unit == -1) return lorentz(c0, c1, angle);
else return cspin(c0, c1, unit * angle);
if(unit == -1) res = lorentz(c0, c1, angle);
else res = cspin(c0, c1, unit * angle);
goto mulwhile;
}
}
transmatrix res;
if(next() == '(') {
if(eat("inv(")) {
res = parsematrix();
force_eat(")");
res = inverse(res);
}
else if(next() == '(') {
at++;
res = parsematrix();
force_eat(")");
@ -512,11 +518,14 @@ transmatrix exp_parser::parsematrix(int prio) {
string token = next_token();
if(token == "id") res = Id;
else if(token == "view") res = View;
else if(token == "mori") res = pconf.mori().get();
else throw hr_parse_exception("unknown matrix: " + token);
}
mulwhile:
while(true) {
skip_white();
if(next() == '*' && prio <= 20) at++, res = res * parsematrix(30);
else break;
}
return res;
}