more logical, half-parallel movement of the camera.

as in, pressing multiple keys works. more or less, there is a short stop
when you press an additional key.

js/pixl/public/trixl.html

@@ -189,30 +189,40 @@
		trixl.start();
		trixl.input = {};
		trixl.input.keys = new Set();
		document.addEventListener("keydown", function(ev) {
			switch (ev.keyCode) {
			case 32:
			trixl.input.keys.add(ev.keyCode);
			var isPressed = function(keyCode) {
				return trixl.input.keys.has(keyCode);
			}
			if (isPressed(32)) { // space
				if (trixl.step.reqId == null) {
					trixl.start();
				} else {
					trixl.stop();
				}
				break;
			case 37: // left
				trixl.pos.x -= 0.1;
				break;
			case 38: // up
				trixl.pos.z -= 0.1;
				break;
			case 39: // right
			}
			if (isPressed(37)) {
				trixl.pos.x += 0.1;
				break;
			case 40: // down
			}
			if (isPressed(38)) {
				trixl.pos.z -= 0.1;
			}
			if (isPressed(39)) {
				trixl.pos.x -= 0.1;
			}
			if (isPressed(40)) {
				trixl.pos.z += 0.1;
				break;
			}
		});
		document.addEventListener("keyup", function(ev) {
			trixl.input.keys.delete(ev.keyCode);
		});
		window.onresize = function() {
			trixl.window.w = window.innerWidth;
			trixl.window.h = window.innerHeight;