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lp
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hello, pixl.

Lucas Stadler 12 anos atrás
pai
a437349cf0
commit
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1 arquivos alterados com 143 adições e 0 exclusões
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  1. 143 0
      js/pixl/index.html

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js/pixl/index.html
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<!doctype html>
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<html>
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<head>
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	<title>.pixl</title>
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	<meta charset="utf-8" />
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	<style type="text/css">
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		body { overflow: hidden; }
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		canvas {
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			position: absolute;
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			top: 0;
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			left: 0;
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		}
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	</style>
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</head>
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<body>
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	<canvas id="stage"></canvas>
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	<script>
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		window.polyfill = {};
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		polyfill.movement = function(ev) {
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			ev.movementX = ev.movementX || ev.mozMovementX || ev.webkitMovementX;
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			ev.movementY = ev.movementY || ev.mozMovementY || ev.webkitMovementY;
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			return ev;
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		};
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	</script>
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	<script>
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		window.pixl = {};
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		pixl.stage = document.querySelector("#stage");
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		pixl.ctx = stage.getContext("2d");
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		pixl.window = {w: window.innerWidth, h: window.innerHeight};
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		pixl.world = {"0,0": {}, "-1,0": {}};
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		pixl.pos = {x: 0, y: 0};
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		pixl.size = 20;
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		pixl.stage.width = pixl.window.w;
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		pixl.stage.height = pixl.window.h;
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		pixl.to_world = function(screen_pos) {
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			return {x: Math.floor((screen_pos.x - pixl.window.w / 2 + pixl.pos.x * pixl.size) / pixl.size),
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					y: Math.floor((screen_pos.y - pixl.window.h / 2 + pixl.pos.y * pixl.size) / pixl.size)};
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		}
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		pixl.to_screen = function(world_pos) {
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			return {x: pixl.window.w / 2 + (world_pos.x - pixl.pos.x) * pixl.size,
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					y: pixl.window.h / 2 + (world_pos.y - pixl.pos.y) * pixl.size};
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		}
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		pixl.draw_pixl = function(pos, color) {
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			pixl.ctx.fillStyle = color || "black";
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			var screen_pos = pixl.to_screen(pos);
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			pixl.ctx.fillRect(screen_pos.x, screen_pos.y, pixl.size, pixl.size);
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			pixl.world[pos.x + "," + pos.y] = {};
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		}
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		pixl.redraw = function() {
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			pixl.ctx.clearRect(0, 0, pixl.window.w, pixl.window.h);
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			var w2 = Math.round(pixl.window.w / pixl.size / 2);
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			var h2 = Math.round(pixl.window.h / pixl.size / 2);
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			pixl.ctx.fillStyle = "black";
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			for (var x = -w2; x < w2; x++) {
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				for (var y = -h2; y < h2; y++) {
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					var pt = pixl.world[[x, y]];
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					if (pt !== undefined) {
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						pixl.draw_pixl({x: x, y: y}, pt.color);
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					}
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				}
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			}
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		}
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		pixl.redraw();
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		pixl.stage.addEventListener("wheel", function(ev) {
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			ev.preventDefault();
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			pixl.size += (pixl.size / 10) * Math.sign(ev.deltaY);
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			if (pixl.size < 5) {
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				pixl.size = 5;
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			} else if (pixl.size > pixl.window.w / 2) {
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				pixl.size = Math.round(pixl.window.w / 2);
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			}
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			pixl.redraw();
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		});
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		window.addEventListener("resize", function(ev) {
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			pixl.window.w = window.innerWidth;
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			pixl.window.h = window.innerHeight;
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			pixl.stage.width = pixl.window.w;
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			pixl.stage.height = pixl.window.h;
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			pixl.redraw();
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		});
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		pixl.drag = {start: undefined, current: undefined};
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		pixl.stage.addEventListener("mousedown", function(ev) {
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			/*if (document.mozPointerLockElement === null) {
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				document.addEventListener("mozpointerlockerror", console.log.bind(console));
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				pixl.stage.mozRequestPointerLock();
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			}*/
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			pixl.drag.start = {x: ev.clientX, y: ev.clientY};
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			pixl.drag.pos = pixl.pos;
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		});
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		pixl.stage.addEventListener("mousemove", function(ev) {
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			if (pixl.drag.start !== undefined) {
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				pixl.drag.current = {x: ev.clientX, y: ev.clientY};
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			}
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		});
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		pixl.stage.addEventListener("mouseup", function(ev) {
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			if (pixl.drag.current === undefined) {
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				var ev = polyfill.movement(ev);
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				pixl.draw_pixl(pixl.to_world({x: ev.clientX, y: ev.clientY}));
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			} else {
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				console.error("drag not implemented");
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			}
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			pixl.drag = {};
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		});
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		document.addEventListener("keydown", function(ev) {
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			if (ev.keyCode >= 37 && ev.keyCode <= 40) {
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				switch (ev.keyCode) {
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					case 37: // left
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						pixl.pos.x -= 1;
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						break;
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					case 38: // up
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						pixl.pos.y -= 1;
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						break;
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					case 39: // right
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						pixl.pos.x += 1;
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						break;
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					case 40: // down
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						pixl.pos.y += 1;
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						break;
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				}
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				pixl.redraw();
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			}
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		});
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	</script>
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</body>
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</html>