55 lines
2.2 KiB
JavaScript
55 lines
2.2 KiB
JavaScript
// 用真实引擎（Player/Level）测量跳跃水平距离，核对求解器的物理近似是否可信
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const handlers = {};
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const addL = (t, fn) => { (handlers[t] = handlers[t] || []).push(fn); };
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globalThis.addEventListener = addL;
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globalThis.window = { addEventListener: addL };
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const key = (t, c) => (handlers[t] || []).forEach(fn => fn({ code: c, preventDefault() { }, repeat: false }));
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const { Level } = await import('../js/level.js');
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const { Player } = await import('../js/player.js');
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const { Input } = await import('../js/input.js');
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// 一块 40 格长的平地，右端断开
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const flat = {
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id: 'test', name: 'T', type: 'jump', width: 44,
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grid: (() => {
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const rows = [];
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rows.push('#'.repeat(44));
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for (let i = 0; i < 16; i++) rows.push('#' + '.'.repeat(42) + '#');
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rows.push('#' + '#'.repeat(42) + '#'); // 整条实心平台
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rows.push('#'.repeat(44));
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return rows;
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})(),
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};
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function measure(djFrame) {
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const L = new Level(flat);
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const P = new Player(L);
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P.x = 8 * 32; P.y = 16 * 32 - P.h; // 站在 row17 平台上（平台行 17）
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P.vx = 0; P.vy = 0; P.grounded = true; P.jumps = 0;
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const x0 = P.x;
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key('keydown', 'ArrowRight');
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key('keydown', 'ShiftLeft');
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let f = 0, landed = -1, released = false;
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for (let i = 0; i < 200; i++) {
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f++;
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// 二段跳需要先松开再按下（跨帧），否则不算一次新的按下
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if (djFrame && f === djFrame) { key('keyup', 'ShiftLeft'); released = true; }
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if (released && f === djFrame + 1) { key('keydown', 'ShiftLeft'); released = false; }
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L.update(1, P, null);
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P.update(1);
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Input.endFrame();
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if (i > 2 && P.grounded) { landed = P.x; break; }
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if (P.dead) break;
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}
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key('keyup', 'ArrowRight'); key('keyup', 'ShiftLeft');
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Input.endFrame();
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return { dist: landed >= 0 ? landed - x0 : null, f };
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}
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console.log('真实引擎跳跃水平距离（起跳点 x 到落点 x，单位 px / 格）');
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for (const dj of [0, 6, 12, 18, 24, 30]) {
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const r = measure(dj);
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console.log(` 二段跳时机=${String(dj).padStart(2)} 帧 -> ${r.dist === null ? '未落地' : r.dist.toFixed(1) + 'px = ' + (r.dist / 32).toFixed(2) + ' 格 (' + r.f + ' 帧)'}`);
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}
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