javascript
/
three.js
şunun yansıması https://github.com/tazdij/three.js.git


			
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js ray cast - texture - canvas</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<style>
			body {
				color: #808080;
				font-family:Monospace;
				font-size:13px;
				text-align:center;

				background-color: #ffffff;
				margin: 0px;
				overflow: hidden;
			}

			#info {
				position: absolute;
				top: 0px; width: 100%;
				padding: 5px;
			}

			#controls {
				position: absolute;
				text-align:left;
				top: 40px;
				left: 5px;
				padding: 5px;
			}

			.control {
				margin-bottom: 3px;
			}

			input {
				width: 50px;
			}
		</style>
	</head>
	<body>
		<div id="container"></div>
		<div id="info"><a href="http://threejs.org" target="_blank">three.js</a> - texture intersection<br>Left to right: buffer geometry - geometry - indexed buffer geometry</div>
		<fieldset id="controls">
			<legend>Circle</legend>
			<div class="control">
				WrapS : <select onchange="setwrapS(this)">
					<option value="ClampToEdgeWrapping">ClampToEdgeWrapping</option>
					<option value="RepeatWrapping">RepeatWrapping</option>
					<option value="MirroredRepeatWrapping">MirroredRepeatWrapping</option>
				</select>
			</div>
			<div class="control">
				WrapT : <select onchange="setwrapT(this)">
					<option value="ClampToEdgeWrapping">ClampToEdgeWrapping</option>
					<option value="RepeatWrapping">RepeatWrapping</option>
					<option value="MirroredRepeatWrapping">MirroredRepeatWrapping</option>
				</select>
			</div>
			<div class="control">
				Offset : X <input type="number" value="0" step="0.05" onchange="setOffsetU(this)" />
				Y <input type="number" value="0" step="0.05" onchange="setOffsetV(this)" /><br />
			</div>
			<div class="control">
				Repeat : X <input type="number" value="1" step="0.1" onchange="setRepeatU(this)" />
				Y <input type="number" value="1" step="0.1" onchange="setRepeatV(this)" />
			</div>
		</fieldset>
		<script src="../build/three.min.js"></script>
		<script>

			CanvasTexture = function (parentTexture) {

				this._canvas = document.createElement("canvas");
				this._context2D = this._canvas.getContext("2d");

				if (parentTexture) {

					this._parentTexture.push(parentTexture);
					parentTexture.image = this._canvas;

				}

				var that = this;
				this._background = document.createElement("img");
				this._background.addEventListener("load", function (event) {

					that._canvas.width = that._background.naturalWidth;
					that._canvas.height = that._background.naturalHeight;

					that._rayonviseur = Math.ceil(Math.min(that._canvas.width, that._canvas.height / 30));
					that._exterieurCroix = Math.ceil(0.70710678 * that._rayonviseur);
					that._interieurCroix = Math.ceil(that._exterieurCroix / 10);
					that._epaisseurViseur = Math.ceil(that._exterieurCroix / 10);

					that._draw();

				}, false);
				this._background.crossOrigin = '';
				this._background.src = "textures/UV_Grid_Sm.jpg";

				this._draw();

			}


			CanvasTexture.prototype = {

				constructor: CanvasTexture,

				_canvas: null,
				_context2D: null,
				_xCross: 0,
				_yCross: 0,

				_rayonviseur: 57,
				_exterieurCroix: 40,
				_interieurCroix: 4,
				_epaisseurViseur: 4,

				_parentTexture: [],

				addParent: function (parentTexture) {

					if (this._parentTexture.indexOf(parentTexture) === -1) {

						this._parentTexture.push(parentTexture);
						parentTexture.image = this._canvas;

					}

				},

				setCrossPosition: function (x, y) {

					this._xCross = x * this._canvas.width;
					this._yCross = y * this._canvas.height;

					this._draw();

				},

				_draw: function () {

					if (!this._context2D) return;

					this._context2D.clearRect(0, 0, this._canvas.width, this._canvas.height)

					// Background.
					this._context2D.drawImage(this._background, 0, 0);

					// Yellow cross.
					this._context2D.lineWidth = this._epaisseurViseur * 3;
					this._context2D.strokeStyle = "#FFFF00";

					this._context2D.beginPath();
					this._context2D.moveTo(this._xCross - this._exterieurCroix - 2, this._yCross - this._exterieurCroix - 2);
					this._context2D.lineTo(this._xCross - this._interieurCroix, this._yCross - this._interieurCroix);

					this._context2D.moveTo(this._xCross + this._interieurCroix, this._yCross + this._interieurCroix);
					this._context2D.lineTo(this._xCross + this._exterieurCroix + 2, this._yCross + this._exterieurCroix + 2);

					this._context2D.moveTo(this._xCross - this._exterieurCroix - 2, this._yCross + this._exterieurCroix + 2);
					this._context2D.lineTo(this._xCross - this._interieurCroix, this._yCross + this._interieurCroix);

					this._context2D.moveTo(this._xCross + this._interieurCroix, this._yCross - this._interieurCroix);
					this._context2D.lineTo(this._xCross + this._exterieurCroix + 2, this._yCross - this._exterieurCroix - 2);

					this._context2D.stroke();

					for (var i = 0; i < this._parentTexture.length; i++) {
					
						//this._parentTexture[i].image = this._canvas;
						this._parentTexture[i].needsUpdate = true;

					}

				}

			}

		</script>
		<script>

			var width = window.innerWidth;
			var height = window.innerHeight;

			var canvas;
			var objects = [];
			var planeTexture, cubeTexture, circleTexture;

			var container;

			var camera, scene, renderer;

			var raycaster = new THREE.Raycaster();
			var mouse = new THREE.Vector2();
			var onClickPosition = new THREE.Vector2();

			init();
			render();
			
			function init() {

				container = document.getElementById("container");

				scene = new THREE.Scene();

				camera = new THREE.PerspectiveCamera(45, width / height, 1, 1000);
				camera.position.x = -30;
				camera.position.y = 40;
				camera.position.z = 50;
				camera.lookAt(scene.position);
			
				renderer = new THREE.WebGLRenderer();
				renderer.setClearColor(new THREE.Color(0xEEEEEE, 1.0));
				renderer.setSize(width, height);
				container.appendChild(renderer.domElement);

				// A cube, in the middle.
				cubeTexture = new THREE.Texture(undefined, THREE.UVMapping, THREE.RepeatWrapping, THREE.RepeatWrapping);
				canvas = new CanvasTexture(cubeTexture);
				var cubeMaterial = new THREE.MeshBasicMaterial({ map: cubeTexture });
				var cubeGeometry = new THREE.BoxGeometry(20, 20, 20);
				// Set a specific texture mapping.
				var uvs;
				for (var i = 0; i < cubeGeometry.faceVertexUvs[0].length; i++) {

					uvs = cubeGeometry.faceVertexUvs[0][i];
					for (var j = 0; j < 3; j++) {

						if (uvs[j].x < 0.1) uvs[j].x = -1;
						if (uvs[j].y < 0.1) uvs[j].y = -1;

					}

				}
				var cube = new THREE.Mesh(cubeGeometry, cubeMaterial);
				cube.position.x = 4;
				cube.position.y = -5;
				cube.position.z = 0;
				objects.push(cube);
				scene.add(cube);

				// A plane on the left.
				planeTexture = new THREE.Texture(undefined, THREE.UVMapping, THREE.MirroredRepeatWrapping, THREE.MirroredRepeatWrapping);
				canvas.addParent(planeTexture);
				var planeMaterial = new THREE.MeshBasicMaterial({ map: planeTexture });
				var planeGeometry = new THREE.PlaneBufferGeometry(25, 25, 1, 1);
				var uvs = planeGeometry.attributes.uv.array;
				for (var i = 0; i < uvs.length; i++) {

					uvs[i] *= 2;

				}
				var plane = new THREE.Mesh(planeGeometry, planeMaterial);
				plane.position.x = -16;
				plane.position.y = -5;
				plane.position.z = 0;
				objects.push(plane);
				scene.add(plane);

				// A circle on the right.
				circleTexture = new THREE.Texture(undefined, THREE.UVMapping, THREE.ClampToEdgeWrapping, THREE.ClampToEdgeWrapping);
				canvas.addParent(circleTexture);
				var circleMaterial = new THREE.MeshBasicMaterial({ map: circleTexture });
				var circleGeometry = new THREE.CircleBufferGeometry(25, 40, 0, Math.PI * 2);
				var uvs = circleGeometry.attributes.uv.array;
				for (var i = 0; i < uvs.length; i++) {

					uvs[i] = (uvs[i] - 0.25) * 2;

				}
				var circle = new THREE.Mesh(circleGeometry, circleMaterial);
				circle.position.x = 24;
				circle.position.y = -5;
				circle.position.z = 0;
				objects.push(circle);
				scene.add(circle);

				window.addEventListener('resize', onWindowResize, false);
				container.addEventListener('click', onClick, false);

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize(window.innerWidth, window.innerHeight);

			};

			function onClick(evt) {

				evt.preventDefault();

				var array = getMousePosition(container, evt.clientX, evt.clientY);
				onClickPosition.fromArray(array);

				var intersects = getIntersects(onClickPosition, objects);
				if (intersects.length > 0 && intersects[0].uv) {

					var uv = intersects[0].uv;
					intersects[0].object.material.map.transformUv(uv);
					canvas.setCrossPosition(uv.x, uv.y);

				}

			};

			var getMousePosition = function (dom, x, y) {

				var rect = dom.getBoundingClientRect();
				return [(x - rect.left) / rect.width, (y - rect.top) / rect.height];

			};

			var getIntersects = function (point, objects) {

				mouse.set((point.x * 2) - 1, -(point.y * 2) + 1);

				raycaster.setFromCamera(mouse, camera);

				return raycaster.intersectObjects(objects);

			};

			function render() {

				requestAnimationFrame(render);
				renderer.render(scene, camera);

			};

			function setwrapS(that) {

				circleTexture.wrapS = THREE[that.value];
				circleTexture.needsUpdate = true;

			};

			function setwrapT(that) {

				circleTexture.wrapT = THREE[that.value];
				circleTexture.needsUpdate = true;

			};

			function setOffsetU(that) {

				circleTexture.offset.x = parseFloat(that.value);

			};

			function setOffsetV(that) {

				circleTexture.offset.y = parseFloat(that.value);

			};

			function setRepeatU(that) {

				circleTexture.repeat.x = parseFloat(that.value);

			};

			function setRepeatV(that) {

				circleTexture.repeat.y = parseFloat(that.value);

			};
		</script>
	</body>
</html>