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nilrider:: consistent replays
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@ -80,6 +80,7 @@ bool turn(int delta) {
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if(!paused && !view_replay && !backing) for(int i=0; i<delta; i++) {
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curlev->history.push_back(curlev->current);
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curlev->current.be_consistent();
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bool b = curlev->current.tick(curlev);
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if(b) timer += 1. / tps;
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else curlev->history.pop_back();
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@ -24,6 +24,7 @@ struct timestamp {
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void draw_instruments(ld t);
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ld energy_in_squares();
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bool collect(level*);
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void be_consistent();
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};
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struct planpoint {
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@ -52,6 +52,7 @@ bool level::simulate() {
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at.heading_angle = atan2(h[1] - at.where[1], h[0] - at.where[0]);
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history.back() = at;
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at.be_consistent();
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if(!at.tick(this)) return false;
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at.t = goal_t;
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history.push_back(at);
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@ -89,6 +89,26 @@ bool timestamp::collect(level *lev) {
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return true;
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}
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/* convert heading to integral units, to make saved replays consistent */
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constexpr ld h_units = 360 * 60 * 60;
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constexpr ld h_mul = h_units / 2 / M_PI;
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int heading_to_int(ld a) {
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a = a * h_mul;
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int ai = floor(a + .5);
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ai = gmod(ai, h_units);
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return ai;
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}
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ld int_to_heading(ld a) {
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return a / h_mul;
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}
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void timestamp::be_consistent() {
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heading_angle = int_to_heading(heading_to_int(heading_angle));
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}
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bool timestamp::tick(level *lev) {
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if(!collect(lev)) return false;
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