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forked: 画像を三角分割でユラユラ

y.kurage

2017-02-06 20:23:32

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画像を三角分割でユラユラと物理エンジンMatter.jsを組み合わせてみた。
適当に作ったのでY方向に隙間ができちゃった……

forked: 画像を三角分割でユラユラ
jQuery v1.6.2

// 三角形分割による、独学テクスチャMapping
// by Hidetaro7
// これの元となった、シンプル三角形分割の考え方はブログに上げてます。
// http://akibahideki.com/blog/html5-canvas-1/canvas.html
// 独学のため、もっと効率のよい方法があればぜひお教えください。（数学はとても苦手です,JSも苦手ですが…）

var ctx, canvas, img;
var w = 0, h = 0, seg = 10, meshToggle = false;
var cn = new Coordinates();

var cloth = null;
var small_body_size = 2;

jQuery(function ($){
	
	canvas = $("canvas#canvas");
	ctx = $(canvas).get(0).getContext("2d");
	
	img = new Image();
	img.src = "http://jsdo.it/img/common/side/bnr_html5_01.png";
	img.onload = function (){
		w = img.width / seg;
		h = img.height / seg;
		cn.setOrigin(40, 40);
		cn.init();
		wave();
	}
	
	$("p#switch a").click(function (){
			if(meshToggle) {
				meshToggle = false;
				$(this).text("メッシュ表示");
			}else{
				meshToggle = true;
				$(this).text("メッシュ非表示");
			}
		});
	
}); //ready

function Mesh (_x, _y, _corner) { //個別管理用
	this.x = _x;
	this.y = _y;
	this.corner = _corner;
	this.pivotX = _x;
	this.pivotY = _y;
}

this.geometry = [];
	this.addPoint = function (_x, _y, corner) {
		ctx.beginPath();
		ctx.fillRect((_x+pivot.x)-this.pointSize*.5, (_y+pivot.y)-this.pointSize*.5, this.pointSize, this.pointSize);
		ctx.closePath();
		var p = new Mesh((_x+pivot.x), (_y+pivot.y) , corner);
		this.meshes.push(p);
	}
	this.setOrigin = function (_x, _y) {
		pivot.x = _x;
		pivot.y = _y;
	}
	this.getOrigin = function () {
		return {"x":pivot.x, "y":pivot.y}
	}
	
	
	
	this.drawMesh = function (){
		ctx.clearRect(0,0, canvas.width(), canvas.height());
		var l = this.meshes.length;
		v = this.meshes;
		
		for( var i=0; i<l; i++ ) {
			if(!v[i].corner) {
				//segment1
				ctx.save();
				ctx.beginPath();
				ctx.moveTo(v[i].x,   v[i].y);
				ctx.lineTo(v[i+1].x, v[i+1].y);
				ctx.lineTo(v[i+seg+2].x,   v[i+seg+1].y); //追加
				ctx.lineTo(v[i+seg+1].x,   v[i+seg+1].y);
				ctx.closePath();
				ctx.clip();
				var t1 = (v[i+1].x - v[i].x)/w;
				var t2 = (v[i+1].y - v[i].y)/w;
				var t3 = (v[i+seg+1].x - v[i].x)/h;
				var t4 = (v[i+seg+1].y - v[i].y)/h;
				ctx.setTransform(t1,t2,t3,t4, v[i].x, v[i].y);
				ctx.drawImage(img, v[i].pivotX-_this.getOrigin().x, v[i].pivotY-_this.getOrigin().y ,w, h, 0, 0 ,w, h);
				
				ctx.restore();
				if (meshToggle) ctx.stroke();
				
				//segment2
				ctx.save();
				ctx.beginPath();
				ctx.lineTo(v[i+1].x, v[i+1].y);
				ctx.lineTo(v[i+seg+1].x, v[i+seg+1].y);
				ctx.lineTo(v[i+seg+2].x+10, v[i+seg+2].y+10);
				ctx.closePath();
				
				t1 = (v[i+seg+2].x - v[i+seg+1].x)/w;
				t2 = (v[i+seg+2].y - v[i+seg+1].y)/w;
				t3 = (v[i+seg+2].x - v[i+1].x)/h;
				t4 = (v[i+seg+2].y - v[i+1].y)/h;

ctx.setTransform(t1,t2,t3,t4, v[i+seg+1].x, v[i+seg+1].y);
				
				
				if(!v[i+1].corner) { 
				//端っこ以外
					ctx.clip();
					ctx.drawImage(img, v[i].pivotX-_this.getOrigin().x, v[i].pivotY-_this.getOrigin().y ,w+10, h, 0, -h ,w+10, h);
				}else{
					ctx.clip();
					ctx.drawImage(img, v[i].pivotX-_this.getOrigin().x, v[i].pivotY-_this.getOrigin().y ,w, h, 0, -h ,w, h);

}
				ctx.restore();
				if (meshToggle) ctx.stroke();
				
			}
		}
	}
	this.matterInit = function () {
    var Engine = Matter.Engine,
        Render = Matter.Render,
        Runner = Matter.Runner,
        Body = Matter.Body,
        Events = Matter.Events,
        Composites = Matter.Composites,
        World = Matter.World,
        Bodies = Matter.Bodies;

// create engine
    var engine = Engine.create(),
        world = engine.world;

/*
    // create renderer
    var render = Render.create({
        element: document.body,
        engine: engine,
        options: {
            width: Math.min(document.documentElement.clientWidth, 800),
            height: Math.min(document.documentElement.clientHeight, 600),
            showAngleIndicator: false
        }
    });
    Render.run(render);
    */

// create runner
    var runner = Runner.create();
    Runner.run(runner, engine);

// add bodies
    var particleOptions = { 
        friction: 0.05,
        frictionStatic: 0.1,
        render: { visible: true } 
    };

// add bodies

group = Body.nextGroup(true);
    cloth = Composites.stack(0, 0, seg+1, seg+1, w - small_body_size, h - small_body_size, function(x, y) {
        return Bodies.rectangle(x, y, small_body_size, small_body_size, { collisionFilter: { group: group } });
    });
    Composites.mesh(cloth, seg+1, seg+1, false, { stiffness: 0.8 });

for (var i = 0; i < 11; i++) {
        cloth.bodies[i].isStatic = true;
    }
    cloth.bodies[ cloth.bodies.length-1 ].isStatic = true;
    World.add(world, [cloth]);

Events.on(engine, 'beforeUpdate', function(event) {
        var py = 201 + 50 * Math.sin(engine.timing.timestamp * 0.002);
        var last_body = cloth.bodies[ cloth.bodies.length-1 ];
        Body.setVelocity(last_body, { x: py - last_body.position.x, y: 0 });
        Body.setPosition(last_body, { x: py , y:201});
    });
  }
}
Coordinates.prototype.meshes = [];
Coordinates.prototype.pointSize = 10;

forked: 画像を三角分割でユラユラ

画像を三角分割でユラユラと物理エンジンMatter.jsを組み合わせてみた。適当に作ったのでY方向に隙間ができちゃった……// 三角形分割による、独学テクスチャMapping // by Hidetaro7 // これの元となった、シンプル三角形分割の考え方はブログに上げてます。 // http://akibahideki.com/blog/html5-canvas-1/canvas.html // 独学のため、もっと効率のよい方法があればぜひお教えください。（数学はとても苦手です,JSも苦手ですが…） var ctx, canvas, img; var w = 0, h = 0, seg = 10, meshToggle = false; var cn = new Coordinates(); var cloth = null; var small_body_size = 2; jQuery(function ($){ canvas = $("canvas#canvas"); ctx = $(canvas).get(0).getContext("2d"); img = new Image(); img.src = "http://jsdo.it/img/common/side/bnr_html5_01.png"; img.onload = function (){ w = img.width / seg; h = img.height / seg; cn.setOrigin(40, 40); cn.init(); wave(); } $("p#switch a").click(function (){ if(meshToggle) { meshToggle = false; $(this).text("メッシュ表示"); }else{ meshToggle = true; $(this).text("メッシュ非表示"); } }); }); //ready function wave () { var mesh = cn.getMesh(), deg = 0, step = Math.floor(360/seg); ctx.strokeStyle = "green"; var enterframe = setInterval(function () { for (var i=0; i<cloth.bodies.length; i++) { mesh[i].x = cloth.bodies[i].position.x; mesh[i].y = cloth.bodies[i].position.y; } cn.drawMesh(); }, 1000/100); } function Mesh (_x, _y, _corner) { //個別管理用 this.x = _x; this.y = _y; this.corner = _corner; this.pivotX = _x; this.pivotY = _y; } function Coordinates() { //　全体管理用 var pivot = {x: 0, y: 0}; var _this = this; var getVertices = function (){ var results = []; for (var i=0, l=_this.meshes.length; i<l; i++) { results.push({"x":_this.meshes[i].x, "y":_this.meshes[i].y}) } return results; } this.getMesh = function (){ return _this.meshes; } this.init = function () { this.matterInit(); var len = Math.pow( seg, 2 ) + seg*2 + 1; var _x = _y = 0; for (var i=0; i<cloth.bodies.length; i++) { var mx = cloth.bodies[i].position.x, my = cloth.bodies[i].position.y, corner = false; if(my >= img.height) {corner = true;} if(mx >= img.width) { _x = 0; _y++; corner = true; } else { _x++; } cn.addPoint(mx, my, corner); } cn.drawMesh(); } this.geometry = []; this.addPoint = function (_x, _y, corner) { ctx.beginPath(); ctx.fillRect((_x+pivot.x)-this.pointSize*.5, (_y+pivot.y)-this.pointSize*.5, this.pointSize, this.pointSize); ctx.closePath(); var p = new Mesh((_x+pivot.x), (_y+pivot.y) , corner); this.meshes.push(p); } this.setOrigin = function (_x, _y) { pivot.x = _x; pivot.y = _y; } this.getOrigin = function () { return {"x":pivot.x, "y":pivot.y} } this.drawMesh = function (){ ctx.clearRect(0,0, canvas.width(), canvas.height()); var l = this.meshes.length; v = this.meshes; for( var i=0; i<l; i++ ) { if(!v[i].corner) { //segment1 ctx.save(); ctx.beginPath(); ctx.moveTo(v[i].x, v[i].y); ctx.lineTo(v[i+1].x, v[i+1].y); ctx.lineTo(v[i+seg+2].x, v[i+seg+1].y); //追加 ctx.lineTo(v[i+seg+1].x, v[i+seg+1].y); ctx.closePath(); ctx.clip(); var t1 = (v[i+1].x - v[i].x)/w; var t2 = (v[i+1].y - v[i].y)/w; var t3 = (v[i+seg+1].x - v[i].x)/h; var t4 = (v[i+seg+1].y - v[i].y)/h; ctx.setTransform(t1,t2,t3,t4, v[i].x, v[i].y); ctx.drawImage(img, v[i].pivotX-_this.getOrigin().x, v[i].pivotY-_this.getOrigin().y ,w, h, 0, 0 ,w, h); ctx.restore(); if (meshToggle) ctx.stroke(); //segment2 ctx.save(); ctx.beginPath(); ctx.lineTo(v[i+1].x, v[i+1].y); ctx.lineTo(v[i+seg+1].x, v[i+seg+1].y); ctx.lineTo(v[i+seg+2].x+10, v[i+seg+2].y+10); ctx.closePath(); t1 = (v[i+seg+2].x - v[i+seg+1].x)/w; t2 = (v[i+seg+2].y - v[i+seg+1].y)/w; t3 = (v[i+seg+2].x - v[i+1].x)/h; t4 = (v[i+seg+2].y - v[i+1].y)/h; ctx.setTransform(t1,t2,t3,t4, v[i+seg+1].x, v[i+seg+1].y); if(!v[i+1].corner) { //端っこ以外 ctx.clip(); ctx.drawImage(img, v[i].pivotX-_this.getOrigin().x, v[i].pivotY-_this.getOrigin().y ,w+10, h, 0, -h ,w+10, h); }else{ ctx.clip(); ctx.drawImage(img, v[i].pivotX-_this.getOrigin().x, v[i].pivotY-_this.getOrigin().y ,w, h, 0, -h ,w, h); } ctx.restore(); if (meshToggle) ctx.stroke(); } } } this.matterInit = function () { var Engine = Matter.Engine, Render = Matter.Render, Runner = Matter.Runner, Body = Matter.Body, Events = Matter.Events, Composites = Matter.Composites, World = Matter.World, Bodies = Matter.Bodies; // create engine var engine = Engine.create(), world = engine.world; /* // create renderer var render = Render.create({ element: document.body, engine: engine, options: { width: Math.min(document.documentElement.clientWidth, 800), height: Math.min(document.documentElement.clientHeight, 600), showAngleIndicator: false } }); Render.run(render); */ // create runner var runner = Runner.create(); Runner.run(runner, engine); // add bodies var particleOptions = { friction: 0.05, frictionStatic: 0.1, render: { visible: true } }; // add bodies group = Body.nextGroup(true); cloth = Composites.stack(0, 0, seg+1, seg+1, w - small_body_size, h - small_body_size, function(x, y) { return Bodies.rectangle(x, y, small_body_size, small_body_size, { collisionFilter: { group: group } }); }); Composites.mesh(cloth, seg+1, seg+1, false, { stiffness: 0.8 }); for (var i = 0; i < 11; i++) { cloth.bodies[i].isStatic = true; } cloth.bodies[ cloth.bodies.length-1 ].isStatic = true; World.add(world, [cloth]); Events.on(engine, 'beforeUpdate', function(event) { var py = 201 + 50 * Math.sin(engine.timing.timestamp * 0.002); var last_body = cloth.bodies[ cloth.bodies.length-1 ]; Body.setVelocity(last_body, { x: py - last_body.position.x, y: 0 }); Body.setPosition(last_body, { x: py , y:201}); }); } } Coordinates.prototype.meshes = []; Coordinates.prototype.pointSize = 10;  <script src="http://jsrun.it/assets/G/U/9/Q/GU9Qf"></script> <div id="wrapper"> <canvas id="canvas" width="300" height="300"></canvas> <p id="switch"><a href="javascript:void(0);">メッシュ表示</a></p> </div> * { padding: 0; margin: 0; } canvas { } #wrapper { width: 500px; text-align: center; } p#switch { text-align: center; } p#switch a { font-family: "ヒラギノ角ゴ Pro W3", "Hiragino Kaku Gothic Pro", "メイリオ", Meiryo, Osaka, "ＭＳＰゴシック", "MS PGothic", sans-serif; font-size: 16px; font-weight: bold; display: inline-block; padding: 8px 10px; line-height: 1; border-radius: 4px; background: -webkit-gradient(linear, left top, left bottom, color-stop(1.00, #ff7400), color-stop(0.00, #ffa443)); background: -webkit-linear-gradient(top, #ffa443 0%, #ff7400 100%); background: -moz-linear-gradient(top, #ffa443 0%, #ff7400 100%); background: -o-linear-gradient(top, #ffa443 0%, #ff7400 100%); background: -ms-linear-gradient(top, #ffa443 0%, #ff7400 100%); background: linear-gradient(top, #ffa443 0%, #ff7400 100%); text-decoration: none; color: white; text-shadow: 0 -1px 0px rgba(0,0,0,.4); -webkit-font-smoothing: antialiased; }

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