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This commit is contained in:
Justin Lin 2020-04-14 15:28:22 +08:00
parent 1bd71893bc
commit a60da4a227
2 changed files with 17 additions and 17 deletions
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30
src/experimental/_impl/_lsystem2_impl.scad
View File

@ -7,35 +7,35 @@ function _join(strs) =
let(leng = len(strs))
[for(i = 0, s = strs[0]; i < leng; i = i + 1, s = str(s, strs[i])) s][leng - 1];
function c_or_v(c, v, rule, rule_pr, leng, i = 0) =
function c_or_v(c, v, rules, rules_pr, leng, i = 0) =
i == leng ? c : (
let(idx = search([v[i]], rule, num_returns_per_match=0, index_col_num = 1)[0][0])
rand(0, 1) <= rule_pr[idx] ? v[i] : c_or_v(c, v, rule, rule_pr, leng, i + 1)
let(idx = search([v[i]], rules, num_returns_per_match=0, index_col_num = 1)[0][0])
rand(0, 1) <= rules_pr[idx] ? v[i] : c_or_v(c, v, rules, rules_pr, leng, i + 1)
);
function _derive1_p(base, rule, rule_pr) =
function _derive1_p(base, rules, rules_pr) =
_join([
for(c = base)
let(v = [for(r = rule) if(r[0] == c) r[1]])
let(v = [for(r = rules) if(r[0] == c) r[1]])
v == [] ? c :
c_or_v(c, v, rule, rule_pr, len(v))
c_or_v(c, v, rules, rules_pr, len(v))
]);
function _derive_p(base, rule, rule_pr, n, i = 0) =
i == n ? base : _derive_p(_derive1_p(base, rule, rule_pr), rule, rule_pr, n, i + 1);
function _derive_p(base, rules, rules_pr, n, i = 0) =
i == n ? base : _derive_p(_derive1_p(base, rules, rules_pr), rules, rules_pr, n, i + 1);
function _derive1(base, rule) = _join([
function _derive1(base, rules) = _join([
for(c = base)
let(v = assoc_lookup(rule, c))
let(v = assoc_lookup(rules, c))
is_undef(v) ? c : v
]);
function _derive(base, rule, n, i = 0) =
i == n ? base : _derive(_derive1(base, rule), rule, n, i + 1);
function _derive(base, rules, n, i = 0) =
i == n ? base : _derive(_derive1(base, rules), rules, n, i + 1);
function _lsystem2_derive(rule, n, rule_pr) =
is_undef(rule_pr) ? _derive(rule[0][1], rule, n) :
rand() <= rule_pr[0] ? _derive_p(rule[0][1], rule, rule_pr, n) : "";
function _lsystem2_derive(rules, n, rules_pr) =
is_undef(rules_pr) ? _derive(rules[0][1], rules, n) :
rand() <= rules_pr[0] ? _derive_p(rules[0][1], rules, rules_pr, n) : "";
function _next_stack(t, code, stack) =
code == "[" ? concat([t], stack) :

4
src/experimental/lsystem2.scad
View File

@ -1,9 +1,9 @@
use <experimental/_impl/_lsystem2_impl.scad>;
use <turtle/turtle2d.scad>;
function lsystem2(rule, n, angle, leng = 1, heading = 0, start = [0, 0], forward_chars = "F", rule_pr) =
function lsystem2(rules, n, angle, leng = 1, heading = 0, start = [0, 0], forward_chars = "F", rules_pr) =
let(
derived = _lsystem2_derive(rule, n, rule_pr),
derived = _lsystem2_derive(rules, n, rules_pr),
codes = forward_chars == "F" ? derived : _join([
for(c = derived)
let(idx = search(c, forward_chars))