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utils.js
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utils.js
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var THREE = require('three');
function Utils() {
function dataURItoBlob(dataURI) {
var binary = atob(dataURI.split(',')[1]);
var array = [];
for(var i = 0; i < binary.length; i++) {
array.push(binary.charCodeAt(i));
}
return array;
// return new Blob([new Uint8Array(array)], {type: 'image/jpeg'});
}
this.equal = function (a, b, error) {
return (Math.abs(a-b) <= error);
};
this.radiansToDegrees = function (radians) {
return radians * 180 / Math.PI;
};
this.degreesToRadians = function (degree) {
return (degree * Math.PI)/180;
};
this.angleBetween = function (a, b) {
// console.log(radiansToDegrees(Math.atan2(b.y, b.x) - Math.atan2(a.y, a.x)));
var angle = Math.atan2(b.y, b.x) - Math.atan2(a.y, a.x);
if (angle < 0) {
angle += Math.PI * 2;
}
return angle;
};
this.signedAngleBetween = function (a, b) {
return Math.atan2(b.y, b.x) - Math.atan2(a.y, a.x);
};
this.angleToTable = function (domino) {
// Get face normal, take rotation into consideration
var mat = new THREE.Matrix4().extractRotation( domino.matrixWorld );
var normal = domino.geometry.faces[4].normal.clone()
normal.applyMatrix4(mat);
normal.normalize();
// Project vector to table.
var tableVector = new THREE.Vector3(normal.x, 0, normal.z);
// Angle to table
return normal.angleTo(tableVector);
};
this.screenToWorld = function (x, y, camera) {
var v = new THREE.Vector3(
( x / window.innerWidth ) * 2 - 1,
-( y / window.innerHeight ) * 2 + 1,
1
);
return v.unproject(camera);
};
this.drawArch = function () {
var radius = block_length*3;
var tube = block_length/2;
var radialSegments = 7;
var tubularSegments = 30;
var arc = Math.PI/2;
var geometry = new THREE.TorusGeometry(radius, tube, radialSegments, tubularSegments, arc);
// var material = new THREE.MeshBasicMaterial( { color: 0xff0000 } );
var material = new THREE.MeshBasicMaterial( { map: arrowTexture, transparent: true} );
var torus = new THREE.Mesh( geometry, material );
return torus;
};
this.createdArrows = function () {
var material = new THREE.MeshBasicMaterial( { map: arrowTexture, transparent: true} );
var geometry = new THREE.SphereGeometry(1.4, 16, 8, Math.PI/6, 2, 1, 1.2);
rightArrow = new THREE.Mesh(geometry, material);
var geometry = new THREE.SphereGeometry(1.4, 16, 8, Math.PI/6 + Math.PI, 2, 1, 1.2);
leftArrow = new THREE.Mesh(geometry, material);
};
this.drawAxes = function (size, position, rotation) {
size = size || 1;
var vertices = new Float32Array( [
0, 0, 0, size, 0, 0,
0, 0, 0, 0, size, 0,
0, 0, 0, 0, 0, size
] );
var colors = new Float32Array( [
1, 0, 0, 1, 0.6, 0,
0, 1, 0, 0.6, 1, 0,
0, 0, 1, 0, 0.6, 1
] );
var geometry = new THREE.BufferGeometry();
geometry.addAttribute( 'position', new THREE.BufferAttribute( vertices, 3 ) );
geometry.addAttribute( 'color', new THREE.BufferAttribute( colors, 3 ) );
var material = new THREE.LineBasicMaterial( { vertexColors: THREE.VertexColors } );
var mesh = new THREE.Line(geometry, material, THREE.LinePieces );
mesh.position.set(position.x, position.y, position.z);
mesh.rotation.set(rotation.x, rotation.y, rotation.z);
return mesh;
};
this.takeScreenShot = function(renderer) {
var dataUri = renderer.domElement.toDataURL("image/jpeg");
// var dataUri = renderer.domElement.toDataURL("image/webp");
var binaryImage = dataURItoBlob(dataUri);
return binaryImage;
};
this.getPageId = function() {
// search for ID in query string.
var url = window.location.href;
var startIdx = url.indexOf("l=");
if(startIdx === -1) {
return;
}
startIdx += "l=".length;
var endIdx = (url.indexOf("&") !== -1) ? url.indexOf("&") : url.length;
var id = url.substr(startIdx, endIdx - startIdx);
return id;
}
this.tweet = function (url) {
var windowOptions = 'scrollbars=yes,resizable=yes,toolbar=no,location=yes',
width = 550,
height = 420,
winHeight = screen.height,
winWidth = screen.width;
var left = Math.round((winWidth / 2) - (width / 2));
var top = 0;
if (winHeight > height) {
top = Math.round((winHeight / 2) - (height / 2));
}
window.open(url, 'intent', windowOptions + ',width=' + width +
',height=' + height + ',left=' + left + ',top=' + top);
return false;
};
}
module.exports = new Utils();