Browse Source

Added new THREE.CombinedCamera. Added orthographic + perspective example

zz85 14 years ago
parent
commit
149c20d177
3 changed files with 246 additions and 0 deletions
  1. 185 0
      examples/canvas_camera_orthographic2.html
  2. 60 0
      src/extras/cameras/CombinedCamera.js
  3. 1 0
      utils/build.py

+ 185 - 0
examples/canvas_camera_orthographic2.html

@@ -0,0 +1,185 @@
+<!doctype html>
+<html lang="en">
+	<head>
+		<title>three.js canvas - combo camera - orthographic + perspective</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 {
+				font-family: Monospace;
+				background-color: #f0f0f0;
+				margin: 0px;
+				overflow: hidden;
+				color: purple;
+			}
+			
+			a {
+				color: red;
+			}
+		</style>
+	</head>
+	<body>
+
+		<script src="../build/Three.js"></script>
+		<script src="../src/extras/cameras/CombinedCamera.js"></script>
+
+		<script src="js/RequestAnimationFrame.js"></script>
+		<script src="js/Stats.js"></script>
+
+		<script>
+
+			var container, stats;
+			var camera, scene, renderer;
+
+			init();
+			animate();
+			
+			function setFov(fov) {
+				camera.setFov(fov);
+				
+				document.getElementById('fov').innerHTML = 'FOV '+ fov.toFixed(2) +'&deg;' ;
+			}
+			
+			function setLens(lens) {
+				// try adding a tween effect while changing focal length, and it'd be even cooler!
+				var fov = camera.setLens(lens);
+				
+				document.getElementById('fov').innerHTML = 'Converted ' + lens + 'mm lens to FOV '+ fov.toFixed(2) +'&deg;' ;
+			}
+			
+			function setOrthographic() {
+				camera.toOrthographic();
+				
+				document.getElementById('fov').innerHTML = 'Orthographic mode' ;
+			}
+			
+			function setPerspective() {
+				camera.toPerspective();
+				
+				document.getElementById('fov').innerHTML = 'Perspective mode' ;
+			}
+
+			function init() {
+
+				container = document.createElement( 'div' );
+				document.body.appendChild( container );
+
+				var info = document.createElement( 'div' );
+				info.style.position = 'absolute';
+				info.style.top = '10px';
+				info.style.width = '100%';
+				info.style.textAlign = 'center';
+				info.innerHTML = '<a href="http://github.com/mrdoob/three.js" target="_blank">three.js</a> - Combo Camera' +
+				'<br/>View: <a href="#" onclick="setOrthographic();return false;"> Orthographic</a> | <a href="#" onclick="setPerspective();return false;">Perspective</a>' +
+				'<br/>Lens: <a href="#" onclick="setLens(12);return false;">12mm</a> | <a href="#" onclick="setLens(16);return false;">16mm</a> | <a href="#" onclick="setLens(24);return false;">24mm</a> | ' +
+				'<a href="#" onclick="setLens(35);return false;">35mm</a> | <a href="#" onclick="setLens(50);return false;">50mm</a> | <a href="#" onclick="setLens(60);return false;">60mm</a> |' +
+				' <a href="#" onclick="setLens(85);return false;">85mm</a> | <a href="#" onclick="setLens(105);return false;">105mm</a>' +
+				'<br/>Fov: <a href="#" onclick="setFov(30);return false;">30&deg;</a> | <a href="#" onclick="setFov(50);return false;">50&deg;</a> | <a href="#" onclick="setFov(70);return false;">70&deg;</a> | <a href="#" onclick="setFov(100);return false;">100&deg;</a> <br/><div id="fov"/>';
+				container.appendChild( info );
+
+				
+				camera = new THREE.CombinedCamera( window.innerWidth, window.innerHeight, 70, 1, 1000, -1000, 1000, 1000 );
+				
+				camera.position.x = 200;
+				camera.position.y = 100;
+				camera.position.z = 200;
+
+				scene = new THREE.Scene();
+
+				// Grid
+
+				var geometry = new THREE.Geometry();
+				geometry.vertices.push( new THREE.Vertex( new THREE.Vector3( - 500, 0, 0 ) ) );
+				geometry.vertices.push( new THREE.Vertex( new THREE.Vector3( 500, 0, 0 ) ) );
+
+				for ( var i = 0; i <= 20; i ++ ) {
+
+					var line = new THREE.Line( geometry, new THREE.LineBasicMaterial( { color: 0x000000, opacity: 0.2 } ) );
+					line.position.z = ( i * 50 ) - 500;
+					scene.add( line );
+
+					var line = new THREE.Line( geometry, new THREE.LineBasicMaterial( { color: 0x000000, opacity: 0.2 } ) );
+					line.position.x = ( i * 50 ) - 500;
+					line.rotation.y = 90 * Math.PI / 180;
+					scene.add( line );
+
+				}
+
+				// Cubes
+
+				var geometry = new THREE.CubeGeometry( 50, 50, 50 );
+				var material = new THREE.MeshLambertMaterial( { color: 0xffffff, shading: THREE.FlatShading } );
+
+				for ( var i = 0; i < 100; i ++ ) {
+
+					var cube = new THREE.Mesh( geometry, material );
+					cube.overdraw = true;
+
+					cube.scale.y = Math.floor( Math.random() * 2 + 1 );
+
+					cube.position.x = Math.floor( ( Math.random() * 1000 - 500 ) / 50 ) * 50 + 25;
+					cube.position.y = ( cube.scale.y * 50 ) / 2;
+					cube.position.z = Math.floor( ( Math.random() * 1000 - 500 ) / 50 ) * 50 + 25;
+
+					scene.add(cube);
+
+				}
+
+				// Lights
+
+				var ambientLight = new THREE.AmbientLight( Math.random() * 0x10 );
+				scene.add( ambientLight );
+
+				var directionalLight = new THREE.DirectionalLight( Math.random() * 0xffffff );
+				directionalLight.position.x = Math.random() - 0.5;
+				directionalLight.position.y = Math.random() - 0.5;
+				directionalLight.position.z = Math.random() - 0.5;
+				directionalLight.position.normalize();
+				scene.add( directionalLight );
+
+				var directionalLight = new THREE.DirectionalLight( Math.random() * 0xffffff );
+				directionalLight.position.x = Math.random() - 0.5;
+				directionalLight.position.y = Math.random() - 0.5;
+				directionalLight.position.z = Math.random() - 0.5;
+				directionalLight.position.normalize();
+				scene.add( directionalLight );
+
+				renderer = new THREE.CanvasRenderer();
+				renderer.setSize( window.innerWidth, window.innerHeight );
+
+				container.appendChild( renderer.domElement );
+
+				stats = new Stats();
+				stats.domElement.style.position = 'absolute';
+				stats.domElement.style.top = '0px';
+				container.appendChild( stats.domElement );
+
+			}
+
+			//
+
+			function animate() {
+
+				requestAnimationFrame( animate );
+
+				render();
+				stats.update();
+
+			}
+
+			function render() {
+
+				var timer = new Date().getTime() * 0.0001;
+
+				camera.position.x = Math.cos( timer ) * 200;
+				camera.position.z = Math.sin( timer ) * 200;
+				camera.lookAt( scene.position );
+
+				renderer.render( scene, camera );
+
+			}
+
+		</script>
+
+	</body>
+</html>

+ 60 - 0
src/extras/cameras/CombinedCamera.js

@@ -0,0 +1,60 @@
+/*
+ *	@author zz85 / http://twitter.com/blurspline / http://www.lab4games.net/zz85/blog 
+ * 
+ *	A handy general perpose camera, for setting FOV, Lens Focal Length,  
+ *		and switching between perspective and orthographic views easily.
+ *
+ */
+
+
+THREE.CombinedCamera = function ( width, height, fov, near, far, orthonear, orthofar ) {
+
+	THREE.Camera.call( this );
+	
+	// We could also handle the projectionMatrix internally, but just wanted to test nested camera objects
+	this.cameraO = new THREE.OrthographicCamera( width / - 2, width / 2, height / 2, height / - 2, 	orthonear, orthofar );
+	this.cameraP = new THREE.PerspectiveCamera( fov, width/height, near, far );
+	
+	this.toPerspective();
+
+};
+
+THREE.CombinedCamera.prototype = new THREE.Camera();
+THREE.CombinedCamera.prototype.constructor = THREE.CoolCamera;
+
+THREE.CombinedCamera.prototype.toPerspective = function () {
+
+	this.near = this.cameraP.near;
+	this.far = this.cameraP.far;
+	this.projectionMatrix = this.cameraP.projectionMatrix;
+
+};
+
+THREE.CombinedCamera.prototype.toOrthographic = function () {
+	this.near = this.cameraO.near;
+	this.far = this.cameraO.far;
+	this.projectionMatrix = this.cameraO.projectionMatrix;
+};
+
+THREE.CombinedCamera.prototype.setFov = function(fov) {
+	this.cameraP.fov = fov;
+	this.cameraP.updateProjectionMatrix();
+	this.toPerspective();
+	
+};
+
+/*
+* Uses Focal Length (in mm) to estimate and set FOV
+* 35mm (fullframe) camera is used if frame size is not specified;
+* Formula based on http://www.bobatkins.com/photography/technical/field_of_view.html
+*/
+THREE.CombinedCamera.prototype.setLens = function(focalLength, framesize) {
+
+    if (!framesize) framesize = 43.25; // 36x24mm
+
+    var fov = 2 * Math.atan( framesize / (focalLength * 2));
+    fov = 180 / Math.PI * fov;
+	this.setFov(fov);
+	
+	return fov;
+};

+ 1 - 0
utils/build.py

@@ -100,6 +100,7 @@ EXTRAS_FILES = [
 'extras/cameras/FlyCamera.js',
 'extras/cameras/RollCamera.js',
 'extras/cameras/TrackballCamera.js',
+'extras/cameras/CombinedCamera.js',
 'extras/controls/FirstPersonControls.js',
 'extras/controls/PathControls.js',
 'extras/controls/FlyControls.js',