Mostly revert actor loop reorg
I was right the first time, and I've proven it to myself now. I originally made the change because I couldn't see any other way to fix the ICEBERG replay from Steam CC1, but now, I do!
This commit is contained in:
Eevee (Evelyn Woods)
parent
413fdce590
commit
299b1578a7
218
js/game.js
218
js/game.js
@ -37,11 +37,8 @@ export class Tile {
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}
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else {
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// For a movement speed of N, the cooldown is set to N during the tic an actor starts
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// moving, then advanced to N - 1 before the tic ends. When movement finishes, the
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// cooldown becomes 0 at the end of a tic, but the actor doesn't decide to move again
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// until the start of the next tic. Thus, actors interpolate "back in time" by up to a
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// full tic; if the cooldown is N - 1 then they interpolate from N to N - 1, and so on.
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let p = ((this.movement_speed - 1 - this.movement_cooldown) + tic_offset) / this.movement_speed;
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// moving, and we interpolate it from there to N - 1 over the course of the duration
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let p = ((this.movement_speed - this.movement_cooldown) + tic_offset) / this.movement_speed;
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return [
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(1 - p) * this.previous_cell.x + p * x,
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(1 - p) * this.previous_cell.y + p * y,
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@ -227,8 +224,6 @@ export class Cell extends Array {
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Cell.prototype.prev_powered_edges = 0;
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Cell.prototype.powered_edges = 0;
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class GameEnded extends Error {}
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// The undo stack is implemented with a ring buffer, and this is its size. One entry per tic.
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// Based on Chrome measurements made against the pathological level CCLP4 #40 (Periodic Lasers) and
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// sitting completely idle, undo consumes about 2 MB every five seconds, so this shouldn't go beyond
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@ -471,24 +466,14 @@ export class Level {
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}
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// Move the game state forwards by one tic.
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// FIXME i have absolutely definitely broken turn-based mode
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advance_tic(p1_actions) {
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if (this.state !== 'playing') {
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console.warn(`Level.advance_tic() called when state is ${this.state}`);
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return;
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}
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// TODO rip out this try/catch, it's not how the game actually works
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try {
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this.advance_tic_all(p1_actions);
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}
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catch (e) {
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if (e instanceof GameEnded) {
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// Do nothing, the game ended and we just wanted to skip the rest
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}
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else {
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throw e;
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}
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}
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// Commit the undo state at the end of each tic (pass 2)
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this.commit();
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@ -524,12 +509,54 @@ export class Level {
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this.sfx.set_player_position(this.player.cell);
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// FIRST PASS: actors decide their upcoming movement simultaneously
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// Note that we iterate in reverse order, DESPITE keeping dead actors around with null
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// FIRST PASS: actors tick their cooldowns, finish their movement, and possibly step on
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// cells they were moving into. This has a few advantages: it makes rendering interpolation
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// much easier, and doing it as a separate pass from /starting/ movement (unlike Lynx)
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// improves the illusion that everything is happening simultaneously.
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// Note that, as far as I can tell, CC2 actually runs this pass every /frame/. We do not!
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// Also Note that we iterate in reverse order, DESPITE keeping dead actors around with null
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// cells, to match the Lynx and CC2 behavior. This is actually important in some cases;
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// check out the start of CCLP3 #54, where the gliders will eat the blue key immediately if
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// they act in forward order! (More subtly, even this decision pass does things like
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// they act in forward order! (More subtly, even the decision pass does things like
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// advance the RNG, so for replay compatibility it needs to be in reverse order too.)
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for (let i = this.actors.length - 1; i >= 0; i--) {
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let actor = this.actors[i];
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// Actors with no cell were destroyed
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if (! actor.cell)
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continue;
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if (actor.movement_cooldown > 0) {
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this._set_tile_prop(actor, 'movement_cooldown', Math.max(0, actor.movement_cooldown - 1));
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if (actor.movement_cooldown <= 0) {
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if (actor.type.ttl) {
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// This is an animation that just finished, so destroy it
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this.remove_tile(actor);
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continue;
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}
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if (! this.compat.tiles_react_instantly) {
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this.step_on_cell(actor, actor.cell);
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}
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// Erase any trace of being in mid-movement, however:
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// - This has to happen after stepping on cells, because some effects care about
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// the cell we're arriving from
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// - Don't do it if stepping on the cell caused us to move again
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if (actor.movement_cooldown <= 0) {
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this._set_tile_prop(actor, 'previous_cell', null);
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this._set_tile_prop(actor, 'movement_speed', null);
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}
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}
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}
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}
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// Handle wiring, now that a bunch of buttons may have been pressed. Do it three times,
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// because CC2 runs it once per frame, not once per tic
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this.update_wiring();
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this.update_wiring();
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this.update_wiring();
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// SECOND PASS: actors decide their upcoming movement simultaneously
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for (let i = this.actors.length - 1; i >= 0; i--) {
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let actor = this.actors[i];
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@ -543,14 +570,6 @@ export class Level {
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if (actor.movement_cooldown > 0)
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continue;
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if (actor.type.ttl) {
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// This is purely an animation and it's finished now, so remove it
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this.remove_tile(actor);
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continue;
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}
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// Our cooldown is zero, so erase any trace of being in mid-movement
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this._set_tile_prop(actor, 'previous_cell', null);
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this._set_tile_prop(actor, 'movement_speed', null);
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// Only reset the player's is_pushing between movement, so it lasts for the whole push
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if (actor === this.player) {
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this._set_tile_prop(actor, 'is_pushing', false);
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@ -667,14 +686,19 @@ export class Level {
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}
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}
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// SECOND PASS: everyone actually moves, or acts, or whatever; this includes ticking down
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// their movement cooldown, even if they just started moving
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// THIRD PASS: everyone actually moves
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let swap_player1 = false;
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for (let i = this.actors.length - 1; i >= 0; i--) {
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let actor = this.actors[i];
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if (! actor.cell)
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continue;
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// Check this again, since an earlier pass may have caused us to start moving
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if (actor.movement_cooldown > 0)
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continue;
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// Check for special player actions, which can only happen when not moving
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if (actor === this.player && actor.movement_cooldown <= 0) {
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if (actor === this.player) {
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if (p1_actions.cycle) {
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this.cycle_inventory(this.player);
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}
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@ -684,12 +708,43 @@ export class Level {
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if (p1_actions.swap) {
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// This is delayed until the end of the tic to avoid screwing up anything
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// checking this.player
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// TODO is this correct? what draws at the end of the tic we do this?
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swap_player1 = true;
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}
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}
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this.take_actor_turn(actor, actor.decision);
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if (! actor.decision)
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continue;
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// Actor is allowed to move, so do so
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let old_cell = actor.cell;
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let success = this.attempt_step(actor, actor.decision);
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// Track whether the player is blocked, for visual effect
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if (actor === this.player && actor.decision && ! success) {
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this.sfx.play_once('blocked');
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actor.is_blocked = true;
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}
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// Players can also bump the tiles in the cell next to the one they're leaving
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let dir2 = actor.secondary_direction;
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if (actor.type.is_real_player && dir2 &&
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! old_cell.blocks_leaving(actor, dir2))
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{
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let neighbor = this.get_neighboring_cell(old_cell, dir2);
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if (neighbor) {
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let could_push = ! neighbor.blocks_entering(actor, dir2, this, true);
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for (let tile of Array.from(neighbor)) {
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if (tile.type.on_bump) {
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tile.type.on_bump(tile, this, actor);
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}
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if (could_push && actor.can_push(tile, dir2)) {
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// Block slapping: you can shove a block by walking past it sideways
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// TODO i think cc2 uses the push pose and possibly even turns you here?
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this.attempt_out_of_turn_step(tile, dir2);
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}
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}
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}
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}
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}
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if (this.toggle_green_objects) {
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@ -697,11 +752,6 @@ export class Level {
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this.toggle_green_objects = false;
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}
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// Now we handle wiring -- three times, because CC2 runs it once per frame, not once per tic
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this.update_wiring();
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this.update_wiring();
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this.update_wiring();
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// In the event that the player is sliding (and thus not deliberately moving) or has
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// stopped, remember their current movement direction here, too.
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// This is hokey, and doing it here is even hokier, but it seems to match CC2 behavior.
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@ -729,6 +779,7 @@ export class Level {
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this.actors.length = p;
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// Possibly switch players
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// FIXME not correct
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if (swap_player1) {
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this.player_index += 1;
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this.player_index %= this.players.length;
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@ -736,7 +787,8 @@ export class Level {
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}
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// Advance the clock
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let tic_counter = this.tic_counter;
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// TODO i suspect cc2 does this at the beginning of the tic, but even if you've won? if you
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// step on a penalty + exit you win, but you see the clock flicker 1 for a single frame
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this.tic_counter += 1;
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if (this.time_remaining !== null && ! this.timer_paused) {
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this.time_remaining -= 1;
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@ -749,65 +801,6 @@ export class Level {
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}
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}
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take_actor_turn(actor, decision) {
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let moved = false;
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if (! actor.cell)
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return moved;
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if (actor.movement_cooldown <= 0 && decision) {
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// Actor is allowed to move, so do so
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let old_cell = actor.cell;
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moved = this.attempt_step(actor, decision);
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// Track whether the player is blocked, for visual effect
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if (actor === this.player && decision && ! moved) {
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this.sfx.play_once('blocked');
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actor.is_blocked = true;
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}
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// Players can also bump the tiles in the cell next to the one they're leaving
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let dir2 = actor.secondary_direction;
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if (actor.type.is_real_player && dir2 &&
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! old_cell.blocks_leaving(actor, dir2))
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{
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let neighbor = this.get_neighboring_cell(old_cell, dir2);
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if (neighbor) {
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let could_push = ! neighbor.blocks_entering(actor, dir2, this, true);
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for (let tile of Array.from(neighbor)) {
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if (tile.type.on_bump) {
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tile.type.on_bump(tile, this, actor);
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}
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if (could_push && actor.can_push(tile, dir2)) {
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// Block slapping: you can shove a block by walking past it sideways
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// TODO i think cc2 uses the push pose and possibly even turns you here?
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this.attempt_out_of_turn_step(tile, dir2);
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}
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}
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}
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}
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}
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// Tick down cooldowns, unless we already had a forced move this tic
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if (actor.forced_turn_tic === this.tic_counter) {
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return moved;
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}
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if (actor.movement_cooldown > 0) {
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this._set_tile_prop(actor, 'movement_cooldown', actor.movement_cooldown - 1);
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if (actor.movement_cooldown <= 0) {
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// Note that we don't clear movement_speed and previous_cell (or remove animations)
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// until the start of the next tic, because animation interpolation still needs to
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// know that we're finishing animating here, AND a couple effects (like blobs
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// spreading slime) need to know about the previous cell in on_arrive
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if (! actor.type.ttl && ! this.compat.tiles_react_instantly) {
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this.step_on_cell(actor, actor.cell);
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}
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}
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}
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return moved;
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}
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// Try to move the given actor one tile in the given direction and update their cooldown.
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// Return true if successful.
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attempt_step(actor, direction) {
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@ -936,16 +929,9 @@ export class Level {
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return true;
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}
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// FIXME delete this
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attempt_out_of_turn_step(actor, direction) {
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if (! this.attempt_step(actor, direction))
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return false;
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// Movement ALWAYS advances by one by the end of the tic. Either this actor has already had
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// a turn, and we're responsible for advancing this new move, or their turn is coming up,
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// and we use this property to prevent them from advancing a second time
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this._set_tile_prop(actor, 'forced_turn_tic', this.tic_counter);
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this._set_tile_prop(actor, 'movement_cooldown', actor.movement_cooldown - 1);
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return true;
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return this.attempt_step(actor, direction);
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}
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// Move the given actor to the given position and perform any appropriate
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@ -1531,16 +1517,15 @@ export class Level {
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// Untimed levels become timed levels with 0 seconds remaining
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this.time_remaining = Math.max(0, (this.time_remaining ?? 0) + dt * 20);
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if (this.time_remaining <= 0) {
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if (this.timer_paused) {
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// If the timer isn't paused, this will kill the player at the end of the tic
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this.time_remaining = 1;
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}
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else {
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this.fail('time');
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}
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}
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}
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fail(reason) {
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if (this.state !== 'playing')
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return;
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if (reason === 'time') {
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this.sfx.play_once('timeup');
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}
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@ -1555,14 +1540,15 @@ export class Level {
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this.state = 'failure';
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this.fail_reason = reason;
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this.player.fail_reason = reason;
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throw new GameEnded;
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}
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win() {
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if (this.state !== 'playing')
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return;
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this.sfx.play_once('win');
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this.state = 'success';
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this._set_tile_prop(this.player, 'exited', true);
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throw new GameEnded;
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}
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get_scorecard() {
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@ -1617,7 +1603,6 @@ export class Level {
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// normal actor behavior of decrementing one's own cooldown at the end of one's turn
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this._set_tile_prop(tile, 'movement_speed', tile.type.ttl);
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this._set_tile_prop(tile, 'movement_cooldown', tile.type.ttl - 1);
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this._set_tile_prop(tile, 'forced_turn_tic', this.tic_counter);
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cell._add(tile);
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this.actors.push(tile);
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this.pending_undo.push(() => {
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@ -1639,7 +1624,6 @@ export class Level {
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this._set_tile_prop(tile, 'previous_cell', null);
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this._set_tile_prop(tile, 'movement_speed', tile.type.ttl);
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this._set_tile_prop(tile, 'movement_cooldown', tile.type.ttl - 1);
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this._set_tile_prop(tile, 'forced_turn_tic', this.tic_counter);
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}
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}
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@ -1099,7 +1099,7 @@ class Player extends PrimaryView {
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if (this.turn_mode === 2) {
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// We're dawdling between tics, so nothing is actually animating, but the clock hasn't
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// advanced yet; pretend whatever's currently animating has finished
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tic_offset = 1;
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tic_offset = 0.999;
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}
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else if (this.use_interpolation) {
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tic_offset = Math.min(0.9999, (performance.now() - this.last_advance) / 1000 * TICS_PER_SECOND * this.play_speed);
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@ -1108,7 +1108,7 @@ class Player extends PrimaryView {
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}
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}
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else {
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tic_offset = 0;
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tic_offset = 0.999;
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}
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this._redraw(tic_offset);
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@ -919,7 +919,7 @@ export class Tileset {
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// first half; if it started on tics 5-8, play the second half. They could get
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// out of sync if the player hesitates, but no one will notice that, and this
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// approach minimizes storing extra state.
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let i = ((tile.movement_speed - 1 - tile.movement_cooldown) + tic % 1) / tile.movement_speed;
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let i = ((tile.movement_speed - tile.movement_cooldown) + tic % 1) / tile.movement_speed;
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// But do NOT do this for explosions or splashes, which have a fixed duration
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// and only play once
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if (this.animation_slowdown > 1 && ! tile.type.ttl) {
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@ -1225,7 +1225,7 @@ export class Tileset {
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// first half; if it started on tics 5-8, play the second half. They could get
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// out of sync if the player hesitates, but no one will notice that, and this
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// approach minimizes storing extra state.
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let i = ((tile.movement_speed - 1 - tile.movement_cooldown) + tic % 1) / tile.movement_speed;
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let i = ((tile.movement_speed - tile.movement_cooldown) + tic % 1) / tile.movement_speed;
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// But do NOT do this for explosions or splashes, which have a fixed duration
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// and only play once
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if (this.animation_slowdown > 1 && ! tile.type.ttl) {
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