Dominic Szablewski
84 lines
1.9 KiB
JavaScript
Executable File
84 lines
1.9 KiB
JavaScript
Executable File
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// We use the ev.code for keyboard input. This contains a string like "KeyW"
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// or "ArrowLeft", which is awkward to use, but it's keyboard layout neutral,
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// so that WASD should work with any layout.
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// We detect the 6th or 3rd char for each of those strings and map them to an
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// in-game button.
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// Movement, Action, Prev/Next, Jump
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let keymap = {
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W: 1, p: 1, // Key[W] or ArrowU[p]
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A: 2, e: 2, // Key[A] or ArrowL[e]ft
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S: 3, o: 3, // Key[S] or ArrowD[o]wn
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D: 4, i: 4, // Key[D] or ArrowR[i]ght
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Q: 5, // Key[Q]
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E: 6, // Key[E]
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c: 9, // KeySpa[c]e
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},
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keys = [
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// Unused zeroth key, so we can test the keymap result for truthiness
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0,
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// WASD/Arrow Keys and prev next have to be set to zero, because we use
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// the value (0 or 1) to calculate the move direction or weapon switch
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0,0,0,0,
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0,0
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// Following Keys (action, jump) to not have to be set here
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// as they are just tested for truthiness
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],
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key_up = 1,
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key_down = 3,
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key_left = 2,
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key_right = 4,
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key_prev = 5,
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key_next = 6,
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key_action = 7, // ev.button = 0
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key_jump = 9, // ev.button = 2
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mouse_x = 0,
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mouse_y = 0,
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last_wheel_event = 0;
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document.onkeydown = (ev) => {
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let k = keymap[ev.code[6] || ev.code[3]];
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if (k) {
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ev.preventDefault();
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keys[k] = 1;
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}
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};
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document.onkeyup = (ev) => {
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let k = keymap[ev.code[6] || ev.code[3]];
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if (k) {
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ev.preventDefault();
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keys[k] = 0;
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}
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};
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document.onwheel = (ev) => {
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// Allow for one wheel event every 0.1s. This sucks, but prevents free
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// spinning or touch scrolling mouses (eg. Apple Magic Mouse) from doing
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// wild things.
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if (game_time - last_wheel_event > 0.1) {
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keys[key_prev + (ev.deltaY > 1 ? 1 : 0)] = 1;
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last_wheel_event = game_time;
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}
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};
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c.onmousemove = (ev) => {
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mouse_x += ev.movementX;
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mouse_y += ev.movementY;
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};
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c.onmousedown = (ev) => {
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ev.preventDefault();
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keys[key_action + ev.button] = 1;
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};
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c.onmouseup = (ev) => {
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ev.preventDefault();
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keys[key_action + ev.button] = 0;
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};
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