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diff --git a/js/photon.js b/js/photon.js
new file mode 100644
index 0000000..49e0808
--- /dev/null
+++ b/js/photon.js
@@ -0,0 +1,854 @@
+/*
+ * Photon
+ * http://photon.attasi.com
+ *
+ * Licensed under the MIT license.
+ * Copyright 2012 Tom Giannattasio
+ */
+
+
+
+var Photon = {
+ version: '0.0.1',
+
+ degToRad: function(deg) {
+ return deg * Math.PI / 180;
+ },
+
+ radToDeg: function(rad) {
+ return rad * 180 / Math.PI;
+ },
+
+ getRotationVector: function(originVector, rotations) {
+ var xVector = originVector.rotate(rotations.x, Line.create([0, 0, 0], [1, 0, 0]));
+ var yVector = xVector.rotate(rotations.y, Line.create([0, 0, 0], [0, 1, 0]));
+ var zVector = yVector.rotate(rotations.z, Line.create([0, 0, 0], [0, 0, 1]));
+ return zVector;
+ },
+
+ // converts transform matrix into a WebKitCSSMatrix object.
+ // multiplies values to avoid whackification
+ buildMatrix: function(faceTransform) {
+ var matrix = new WebKitCSSMatrix(faceTransform);
+
+ matrix.m11 = matrix.m11 * 10000000000000000;
+ matrix.m12 = matrix.m12 * 10000000000000000;
+ matrix.m13 = matrix.m13 * 10000000000000000;
+ matrix.m14 = matrix.m14 * 10000000000000000;
+
+ matrix.m21 = matrix.m21 * 10000000000000000;
+ matrix.m22 = matrix.m22 * 10000000000000000;
+ matrix.m23 = matrix.m23 * 10000000000000000;
+ matrix.m24 = matrix.m24 * 10000000000000000;
+
+ matrix.m31 = matrix.m31 * 10000000000000000;
+ matrix.m32 = matrix.m32 * 10000000000000000;
+ matrix.m33 = matrix.m33 * 10000000000000000;
+ matrix.m34 = matrix.m34 * 10000000000000000;
+
+ matrix.m41 = matrix.m41 * 10000000000000000;
+ matrix.m42 = matrix.m42 * 10000000000000000;
+ matrix.m43 = matrix.m43 * 10000000000000000;
+ matrix.m44 = matrix.m44 * 10000000000000000;
+
+ return matrix;
+ }
+};
+
+
+
+Photon.Light = function(xVal, yVal, zVal) {
+ this.moveTo(xVal || 0, yVal || 0, zVal || 100);
+ this.calculateVector();
+}
+
+Photon.Light.prototype = {
+ moveTo: function(x, y, z) {
+ this.x = x;
+ this.y = y;
+ this.z = z;
+ this.calculateVector();
+ },
+
+ // covert the light coordinates into a vector
+ calculateVector: function() {
+ this.magnitude = Math.sqrt((this.x * this.x) + (this.y * this.y) + (this.z * this.z));
+ this.vector = $V([this.x / this.magnitude, this.y / this.magnitude, this.z / this.magnitude]);
+ }
+}
+
+
+
+Photon.Face = function(element, maxShade, maxTint, isBackfaced) {
+ // set properties
+ this.element = element;
+ this.maxShade = maxShade || .5;
+ this.maxTint = maxTint || 0;
+ this.isBackfaced = isBackfaced || false;
+
+ // create shader element
+ this.shaderElement = new Photon.ShaderElement(this.element);
+ this.element.insertBefore(this.shaderElement, this.element.firstChild);
+
+ // calculate absolute rotations
+ this.getRotations();
+}
+
+Photon.Face.prototype = {
+ getRotations: function() {
+ // pull the transform property
+ var faceTransform = window.getComputedStyle(this.element).webkitTransform || 'matrix3d(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)';
+
+ // convert the transform data into a matrix
+ this.matrix = Photon.buildMatrix(faceTransform);
+
+ // extract the individual transform values
+ var faceDecomp = this.matrix.decompose();
+ this.rotations = {
+ x: faceDecomp.rotate.x,
+ y: faceDecomp.rotate.y,
+ z: faceDecomp.rotate.z
+ };
+
+ // set the face's vector
+ this.vector = Photon.getRotationVector($V([0, 0, 1]), this.rotations);
+ },
+
+ render: function(light, getNewRotations, parentRotations) {
+ if(getNewRotations) {
+ this.getRotations();
+ }
+
+ // calculate the absolute vector
+ var fullVector;
+ if(parentRotations) {
+ fullVector = Photon.getRotationVector(this.vector, parentRotations);
+ } else {
+ fullVector = this.vector;
+ }
+
+ // calculate the anglar distance from the light
+ this.angleFrom = radToDeg(light.vector.angleFrom(fullVector));
+
+ // determine the background color of the shader element
+ var background;
+
+ // var anglePercentage = this.angleFrom / 180;
+ var anglePercentage = this.isBackfaced ? this.angleFrom / 180 : this.angleFrom / 90;
+ if(this.isBackfaced && anglePercentage > .5) {
+ anglePercentage = 1 - anglePercentage;
+ }
+ var range = Math.abs(this.maxShade + this.maxTint);
+ var rangedPercentage = range * anglePercentage;
+ this.rangedPercentage = rangedPercentage;
+
+ // determine whether to shade or tint
+ if(rangedPercentage <= this.maxTint) {
+ background = 'rgba(255, 255, 255, ' + Math.abs(this.maxTint - rangedPercentage) + ')';
+ } else {
+ background = 'rgba(0, 0, 0, ' + Math.abs(rangedPercentage - this.maxTint) + ')';
+ }
+
+ // apply the shading
+ this.shaderElement.style.background = background;
+ },
+
+ setMaxShade: function(value) {
+ this.maxShade = value;
+ },
+
+ setMaxTint: function(value) {
+ this.maxTint = value;
+ }
+};
+
+
+// create the element to used for shading and tinting
+Photon.ShaderElement = function(parent) {
+ var shaderElement = document.createElement('div');
+ shaderElement.className = 'photon-shader';
+ shaderElement.style.position = 'absolute';
+ shaderElement.style.top = '0';
+ shaderElement.style.left = '0';
+ shaderElement.style.width = window.getComputedStyle(parent).width;
+ shaderElement.style.height = window.getComputedStyle(parent).height;
+
+ return shaderElement;
+}
+
+
+// a group of faces within a single parent object
+Photon.FaceGroup = function(parent, faces, maxShade, maxTint, isBackfaced) {
+ this.element = parent;
+ this.faces = [];
+
+ var childFaces;
+
+ if(faces) {
+ childFaces = faces;
+ } else {
+ childFaces = parent.children();
+ }
+
+ for(var i = 0; i < childFaces.length; i++) {
+ this.faces[i] = new Photon.Face(childFaces[i], maxShade, maxTint, isBackfaced);
+ }
+}
+
+Photon.FaceGroup.prototype = {
+ getRotations: function() {
+ var faceTransform = window.getComputedStyle(this.element).webkitTransform || 'matrix3d(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)';
+
+ this.matrix = Photon.buildMatrix(faceTransform);
+ var faceDecomp = this.matrix.decompose();
+
+ this.rotations = {
+ x: faceDecomp.rotate.x,
+ y: faceDecomp.rotate.y,
+ z: faceDecomp.rotate.z
+ };
+
+ this.vector = Photon.getRotationVector($V([0, 0, 1]), this.rotations);
+ },
+
+ render: function(light, getNewGroupRotations, getNewFaceRotations) {
+ if(getNewGroupRotations) {
+ this.getRotations();
+ }
+
+ this.angleFrom = radToDeg(light.vector.angleFrom(this.vector));
+
+ for(var i = 0, length = this.faces.length; i < length; i++) {
+ this.faces[i].render(light, getNewFaceRotations, this.rotations);
+ }
+ },
+
+ setMaxShade: function(value) {
+ for(var i = 0; i < this.faces.length; i++) {
+ this.faces[i].setMaxShade(value);
+ }
+ },
+
+ setMaxTint: function(value) {
+ for(var i = 0; i < this.faces.length; i++) {
+ this.faces[i].setMaxTint(value);
+ }
+ }
+};
+
+
+
+
+
+
+
+
+
+
+
+
+// === Sylvester ===
+// Vector and Matrix mathematics modules for JavaScript
+// Copyright (c) 2007 James Coglan
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+
+var Sylvester = {
+ version: '0.1.3',
+ precision: 1e-6
+};
+
+
+
+function Vector() {}
+Vector.prototype = {
+
+ // Returns the modulus ('length') of the vector
+ modulus: function() {
+ return Math.sqrt(this.dot(this));
+ },
+
+ // Returns a copy of the vector
+ dup: function() {
+ return Vector.create(this.elements);
+ },
+
+ // Calls the iterator for each element of the vector in turn
+ each: function(fn) {
+ var n = this.elements.length, k = n, i;
+ do { i = k - n;
+ fn(this.elements[i], i+1);
+ } while (--n);
+ },
+
+ // Returns the angle between the vector and the argument (also a vector)
+ angleFrom: function(vector) {
+ var V = vector.elements || vector;
+ var n = this.elements.length, k = n, i;
+ if (n != V.length) { return null; }
+ var dot = 0, mod1 = 0, mod2 = 0;
+ // Work things out in parallel to save time
+ this.each(function(x, i) {
+ dot += x * V[i-1];
+ mod1 += x * x;
+ mod2 += V[i-1] * V[i-1];
+ });
+ mod1 = Math.sqrt(mod1); mod2 = Math.sqrt(mod2);
+ if (mod1*mod2 === 0) { return null; }
+ var theta = dot / (mod1*mod2);
+ if (theta < -1) { theta = -1; }
+ if (theta > 1) { theta = 1; }
+ return Math.acos(theta);
+ },
+
+ // Returns the scalar product of the vector with the argument
+ // Both vectors must have equal dimensionality
+ dot: function(vector) {
+ var V = vector.elements || vector;
+ var i, product = 0, n = this.elements.length;
+ if (n != V.length) { return null; }
+ do { product += this.elements[n-1] * V[n-1]; } while (--n);
+ return product;
+ },
+
+ // Rotates the vector about the given object. The object should be a
+ // point if the vector is 2D, and a line if it is 3D. Be careful with line directions!
+ rotate: function(t, obj) {
+ var V, R, x, y, z;
+ switch (this.elements.length) {
+ case 2:
+ V = obj.elements || obj;
+ if (V.length != 2) { return null; }
+ R = Matrix.Rotation(t).elements;
+ x = this.elements[0] - V[0];
+ y = this.elements[1] - V[1];
+ return Vector.create([
+ V[0] + R[0][0] * x + R[0][1] * y,
+ V[1] + R[1][0] * x + R[1][1] * y
+ ]);
+ break;
+ case 3:
+ if (!obj.direction) { return null; }
+ var C = obj.pointClosestTo(this).elements;
+ R = Matrix.Rotation(t, obj.direction).elements;
+ x = this.elements[0] - C[0];
+ y = this.elements[1] - C[1];
+ z = this.elements[2] - C[2];
+ return Vector.create([
+ C[0] + R[0][0] * x + R[0][1] * y + R[0][2] * z,
+ C[1] + R[1][0] * x + R[1][1] * y + R[1][2] * z,
+ C[2] + R[2][0] * x + R[2][1] * y + R[2][2] * z
+ ]);
+ break;
+ default:
+ return null;
+ }
+ },
+
+ // Set vector's elements from an array
+ setElements: function(els) {
+ this.elements = (els.elements || els).slice();
+ return this;
+ }
+};
+
+// Constructor function
+Vector.create = function(elements) {
+ var V = new Vector();
+ return V.setElements(elements);
+};
+
+var $V = Vector.create;
+
+
+
+function Line() {}
+Line.prototype = {
+
+ // Returns the line's perpendicular distance from the argument,
+ // which can be a point, a line or a plane
+ distanceFrom: function(obj) {
+ if (obj.normal) { return obj.distanceFrom(this); }
+ if (obj.direction) {
+ // obj is a line
+ if (this.isParallelTo(obj)) { return this.distanceFrom(obj.anchor); }
+ var N = this.direction.cross(obj.direction).toUnitVector().elements;
+ var A = this.anchor.elements, B = obj.anchor.elements;
+ return Math.abs((A[0] - B[0]) * N[0] + (A[1] - B[1]) * N[1] + (A[2] - B[2]) * N[2]);
+ } else {
+ // obj is a point
+ var P = obj.elements || obj;
+ var A = this.anchor.elements, D = this.direction.elements;
+ var PA1 = P[0] - A[0], PA2 = P[1] - A[1], PA3 = (P[2] || 0) - A[2];
+ var modPA = Math.sqrt(PA1*PA1 + PA2*PA2 + PA3*PA3);
+ if (modPA === 0) return 0;
+ // Assumes direction vector is normalized
+ var cosTheta = (PA1 * D[0] + PA2 * D[1] + PA3 * D[2]) / modPA;
+ var sin2 = 1 - cosTheta*cosTheta;
+ return Math.abs(modPA * Math.sqrt(sin2 < 0 ? 0 : sin2));
+ }
+ },
+
+ // Returns true iff the argument is a point on the line
+ contains: function(point) {
+ var dist = this.distanceFrom(point);
+ return (dist !== null && dist <= Sylvester.precision);
+ },
+
+ // Returns the point on the line that is closest to the given point or line
+ pointClosestTo: function(obj) {
+ if (obj.direction) {
+ // obj is a line
+ if (this.intersects(obj)) { return this.intersectionWith(obj); }
+ if (this.isParallelTo(obj)) { return null; }
+ var D = this.direction.elements, E = obj.direction.elements;
+ var D1 = D[0], D2 = D[1], D3 = D[2], E1 = E[0], E2 = E[1], E3 = E[2];
+ // Create plane containing obj and the shared normal and intersect this with it
+ // Thank you: http://www.cgafaq.info/wiki/Line-line_distance
+ var x = (D3 * E1 - D1 * E3), y = (D1 * E2 - D2 * E1), z = (D2 * E3 - D3 * E2);
+ var N = Vector.create([x * E3 - y * E2, y * E1 - z * E3, z * E2 - x * E1]);
+ var P = Plane.create(obj.anchor, N);
+ return P.intersectionWith(this);
+ } else {
+ // obj is a point
+ var P = obj.elements || obj;
+ if (this.contains(P)) { return Vector.create(P); }
+ var A = this.anchor.elements, D = this.direction.elements;
+ var D1 = D[0], D2 = D[1], D3 = D[2], A1 = A[0], A2 = A[1], A3 = A[2];
+ var x = D1 * (P[1]-A2) - D2 * (P[0]-A1), y = D2 * ((P[2] || 0) - A3) - D3 * (P[1]-A2),
+ z = D3 * (P[0]-A1) - D1 * ((P[2] || 0) - A3);
+ var V = Vector.create([D2 * x - D3 * z, D3 * y - D1 * x, D1 * z - D2 * y]);
+ var k = this.distanceFrom(P) / V.modulus();
+ return Vector.create([
+ P[0] + V.elements[0] * k,
+ P[1] + V.elements[1] * k,
+ (P[2] || 0) + V.elements[2] * k
+ ]);
+ }
+ },
+
+ // Returns a copy of the line rotated by t radians about the given line. Works by
+ // finding the argument's closest point to this line's anchor point (call this C) and
+ // rotating the anchor about C. Also rotates the line's direction about the argument's.
+ // Be careful with this - the rotation axis' direction affects the outcome!
+ rotate: function(t, line) {
+ // If we're working in 2D
+ if (typeof(line.direction) == 'undefined') { line = Line.create(line.to3D(), Vector.k); }
+ var R = Matrix.Rotation(t, line.direction).elements;
+ var C = line.pointClosestTo(this.anchor).elements;
+ var A = this.anchor.elements, D = this.direction.elements;
+ var C1 = C[0], C2 = C[1], C3 = C[2], A1 = A[0], A2 = A[1], A3 = A[2];
+ var x = A1 - C1, y = A2 - C2, z = A3 - C3;
+ return Line.create([
+ C1 + R[0][0] * x + R[0][1] * y + R[0][2] * z,
+ C2 + R[1][0] * x + R[1][1] * y + R[1][2] * z,
+ C3 + R[2][0] * x + R[2][1] * y + R[2][2] * z
+ ], [
+ R[0][0] * D[0] + R[0][1] * D[1] + R[0][2] * D[2],
+ R[1][0] * D[0] + R[1][1] * D[1] + R[1][2] * D[2],
+ R[2][0] * D[0] + R[2][1] * D[1] + R[2][2] * D[2]
+ ]);
+ },
+
+ // Set the line's anchor point and direction.
+ setVectors: function(anchor, direction) {
+ // Need to do this so that line's properties are not
+ // references to the arguments passed in
+ anchor = Vector.create(anchor);
+ direction = Vector.create(direction);
+ if (anchor.elements.length == 2) {anchor.elements.push(0); }
+ if (direction.elements.length == 2) { direction.elements.push(0); }
+ if (anchor.elements.length > 3 || direction.elements.length > 3) { return null; }
+ var mod = direction.modulus();
+ if (mod === 0) { return null; }
+ this.anchor = anchor;
+ this.direction = Vector.create([
+ direction.elements[0] / mod,
+ direction.elements[1] / mod,
+ direction.elements[2] / mod
+ ]);
+ return this;
+ }
+};
+
+// Constructor function
+Line.create = function(anchor, direction) {
+ var L = new Line();
+ return L.setVectors(anchor, direction);
+};
+
+
+
+function Matrix() {}
+Matrix.prototype = {
+ // Set the matrix's elements from an array. If the argument passed
+ // is a vector, the resulting matrix will be a single column.
+ setElements: function(els) {
+ var i, elements = els.elements || els;
+ if (typeof(elements[0][0]) != 'undefined') {
+ var ni = elements.length, ki = ni, nj, kj, j;
+ this.elements = [];
+ do { i = ki - ni;
+ nj = elements[i].length; kj = nj;
+ this.elements[i] = [];
+ do { j = kj - nj;
+ this.elements[i][j] = elements[i][j];
+ } while (--nj);
+ } while(--ni);
+ return this;
+ }
+ var n = elements.length, k = n;
+ this.elements = [];
+ do { i = k - n;
+ this.elements.push([elements[i]]);
+ } while (--n);
+ return this;
+ }
+};
+
+// Constructor function
+Matrix.create = function(elements) {
+ var M = new Matrix();
+ return M.setElements(elements);
+};
+
+Matrix.Rotation = function(theta, a) {
+ if (!a) {
+ return Matrix.create([
+ [Math.cos(theta), -Math.sin(theta)],
+ [Math.sin(theta), Math.cos(theta)]
+ ]);
+ }
+ var axis = a.dup();
+ if (axis.elements.length != 3) { return null; }
+ var mod = axis.modulus();
+ var x = axis.elements[0]/mod, y = axis.elements[1]/mod, z = axis.elements[2]/mod;
+ var s = Math.sin(theta), c = Math.cos(theta), t = 1 - c;
+ // Formula derived here: http://www.gamedev.net/reference/articles/article1199.asp
+ // That proof rotates the co-ordinate system so theta
+ // becomes -theta and sin becomes -sin here.
+ return Matrix.create([
+ [ t*x*x + c, t*x*y - s*z, t*x*z + s*y ],
+ [ t*x*y + s*z, t*y*y + c, t*y*z - s*x ],
+ [ t*x*z - s*y, t*y*z + s*x, t*z*z + c ]
+ ]);
+};
+
+
+
+
+
+
+
+
+
+
+
+
+/*
+ * @preserve Morf v0.1.5
+ * http://www.joelambert.co.uk/morf
+ *
+ * Copyright 2011, Joe Lambert.
+ * Free to use under the MIT license.
+ * http://www.opensource.org/licenses/mit-license.php
+ */
+
+var CSSMatrixDecomposed = function(obj) {
+ obj === undefined ? obj = {} : null;
+ var components = {perspective: null, translate: null, skew: null, scale: null, rotate: null};
+
+ for(var i in components)
+ this[i] = obj[i] ? obj[i] : new Vector4();
+
+ /**
+ * Tween between two decomposed matrices
+ * @param {CSSMatrixDecomposed} dm The destination decomposed matrix
+ * @param {float} progress A float value between 0-1, representing the percentage of completion
+ * @param {function} fn An easing function following the prototype function(pos){}
+ * @author Joe Lambert
+ * @returns {WebKitCSSMatrix} A new matrix for the tweened state
+ */
+
+ this.tween = function(dm, progress, fn) {
+ if(fn === undefined)
+ fn = function(pos) {return pos;}; // Default to a linear easing
+
+ if(!dm)
+ dm = new CSSMatrixDecomposed(new WebKitCSSMatrix().decompose());
+
+ var r = new CSSMatrixDecomposed(),
+ i = index = null,
+ trans = '';
+
+ progress = fn(progress);
+
+ for(index in components)
+ for(i in {x:'x', y:'y', z:'z', w:'w'})
+ r[index][i] = (this[index][i] + (dm[index][i] - this[index][i]) * progress ).toFixed(5);
+
+ trans = 'matrix3d(1,0,0,0, 0,1,0,0, 0,0,1,0, '+r.perspective.x+', '+r.perspective.y+', '+r.perspective.z+', '+r.perspective.w+') ' +
+ 'translate3d('+r.translate.x+'px, '+r.translate.y+'px, '+r.translate.y+'px) ' +
+ 'rotateX('+r.rotate.x+'rad) rotateY('+r.rotate.y+'rad) rotateZ('+r.rotate.z+'rad) ' +
+ 'matrix3d(1,0,0,0, 0,1,0,0, 0,'+r.skew.z+',1,0, 0,0,0,1) ' +
+ 'matrix3d(1,0,0,0, 0,1,0,0, '+r.skew.y+',0,1,0, 0,0,0,1) ' +
+ 'matrix3d(1,0,0,0, '+r.skew.x+',1,0,0, 0,0,1,0, 0,0,0,1) ' +
+ 'scale3d('+r.scale.x+', '+r.scale.y+', '+r.scale.z+')';
+
+ try { r = new WebKitCSSMatrix(trans); return r; }
+ catch(e) { console.error('Invalid matrix string: '+trans); return '' };
+ };
+};
+
+var Vector4 = function(x, y, z, w)
+{
+ this.x = x ? x : 0;
+ this.y = y ? y : 0;
+ this.z = z ? z : 0;
+ this.w = w ? w : 0;
+
+
+ /**
+ * Ensure that values are not undefined
+ * @author Joe Lambert
+ * @returns null
+ */
+
+ this.checkValues = function() {
+ this.x = this.x ? this.x : 0;
+ this.y = this.y ? this.y : 0;
+ this.z = this.z ? this.z : 0;
+ this.w = this.w ? this.w : 0;
+ };
+
+
+ /**
+ * Get the length of the vector
+ * @author Joe Lambert
+ * @returns {float}
+ */
+
+ this.length = function() {
+ this.checkValues();
+ return Math.sqrt(this.x*this.x + this.y*this.y + this.z*this.z);
+ };
+
+
+ /**
+ * Get a normalised representation of the vector
+ * @author Joe Lambert
+ * @returns {Vector4}
+ */
+
+ this.normalise = function() {
+ var len = this.length(),
+ v = new Vector4(this.x / len, this.y / len, this.z / len);
+
+ return v;
+ };
+
+
+ /**
+ * Vector Dot-Product
+ * @param {Vector4} v The second vector to apply the product to
+ * @author Joe Lambert
+ * @returns {float} The Dot-Product of this and v.
+ */
+
+ this.dot = function(v) {
+ return this.x*v.x + this.y*v.y + this.z*v.z + this.w*v.w;
+ };
+
+
+ /**
+ * Vector Cross-Product
+ * @param {Vector4} v The second vector to apply the product to
+ * @author Joe Lambert
+ * @returns {Vector4} The Cross-Product of this and v.
+ */
+
+ this.cross = function(v) {
+ return new Vector4(this.y*v.z - this.z*v.y, this.z*v.x - this.x*v.z, this.x*v.y - this.y*v.x);
+ };
+
+
+ /**
+ * Helper function required for matrix decomposition
+ * A Javascript implementation of pseudo code available from http://www.w3.org/TR/css3-2d-transforms/#matrix-decomposition
+ * @param {Vector4} aPoint A 3D point
+ * @param {float} ascl
+ * @param {float} bscl
+ * @author Joe Lambert
+ * @returns {Vector4}
+ */
+
+ this.combine = function(aPoint, ascl, bscl) {
+ return new Vector4( (ascl * this.x) + (bscl * aPoint.x),
+ (ascl * this.y) + (bscl * aPoint.y),
+ (ascl * this.z) + (bscl * aPoint.z) );
+ }
+};
+
+WebKitCSSMatrix.prototype.determinant = function() {
+ return this.m14 * this.m23 * this.m32 * this.m41-this.m13 * this.m24 * this.m32 * this.m41 -
+ this.m14 * this.m22 * this.m33 * this.m41+this.m12 * this.m24 * this.m33 * this.m41 +
+ this.m13 * this.m22 * this.m34 * this.m41-this.m12 * this.m23 * this.m34 * this.m41 -
+ this.m14 * this.m23 * this.m31 * this.m42+this.m13 * this.m24 * this.m31 * this.m42 +
+ this.m14 * this.m21 * this.m33 * this.m42-this.m11 * this.m24 * this.m33 * this.m42 -
+ this.m13 * this.m21 * this.m34 * this.m42+this.m11 * this.m23 * this.m34 * this.m42 +
+ this.m14 * this.m22 * this.m31 * this.m43-this.m12 * this.m24 * this.m31 * this.m43 -
+ this.m14 * this.m21 * this.m32 * this.m43+this.m11 * this.m24 * this.m32 * this.m43 +
+ this.m12 * this.m21 * this.m34 * this.m43-this.m11 * this.m22 * this.m34 * this.m43 -
+ this.m13 * this.m22 * this.m31 * this.m44+this.m12 * this.m23 * this.m31 * this.m44 +
+ this.m13 * this.m21 * this.m32 * this.m44-this.m11 * this.m23 * this.m32 * this.m44 -
+ this.m12 * this.m21 * this.m33 * this.m44+this.m11 * this.m22 * this.m33 * this.m44;
+};
+
+WebKitCSSMatrix.prototype.decompose = function() {
+ var matrix = new WebKitCSSMatrix(this.toString()),
+ perspectiveMatrix = rightHandSide = inversePerspectiveMatrix = transposedInversePerspectiveMatrix =
+ perspective = translate = row = i = scale = skew = pdum3 = rotate = null;
+
+ if (matrix.m33 == 0)
+ return new CSSMatrixDecomposed(new WebKitCSSMatrix().decompose()); // Return the identity matrix
+
+ // Normalize the matrix.
+ for (i = 1; i <= 4; i++)
+ for (j = 1; j <= 4; j++)
+ matrix['m'+i+j] /= matrix.m44;
+
+ // perspectiveMatrix is used to solve for perspective, but it also provides
+ // an easy way to test for singularity of the upper 3x3 component.
+ perspectiveMatrix = matrix;
+
+ for (i = 1; i <= 3; i++)
+ perspectiveMatrix['m'+i+'4'] = 0;
+
+ perspectiveMatrix.m44 = 1;
+
+ if (perspectiveMatrix.determinant() == 0)
+ return new CSSMatrixDecomposed(new WebKitCSSMatrix().decompose()); // Return the identity matrix
+
+ // First, isolate perspective.
+ if (matrix.m14 != 0 || matrix.m24 != 0 || matrix.m34 != 0)
+ {
+ // rightHandSide is the right hand side of the equation.
+ rightHandSide = new Vector4(matrix.m14, matrix.m24, matrix.m34, matrix.m44);
+
+ // Solve the equation by inverting perspectiveMatrix and multiplying
+ // rightHandSide by the inverse.
+ inversePerspectiveMatrix = perspectiveMatrix.inverse();
+ transposedInversePerspectiveMatrix = inversePerspectiveMatrix.transpose();
+ perspective = transposedInversePerspectiveMatrix.transformVector(rightHandSide);
+
+ // Clear the perspective partition
+ matrix.m14 = matrix.m24 = matrix.m34 = 0;
+ matrix.m44 = 1;
+ }
+ else
+ {
+ // No perspective.
+ perspective = new Vector4(0,0,0,1);
+ }
+
+ // Next take care of translation
+ translate = new Vector4(matrix.m41, matrix.m42, matrix.m43);
+
+ matrix.m41 = 0;
+ matrix.m42 = 0;
+ matrix.m43 = 0;
+
+ // Now get scale and shear. 'row' is a 3 element array of 3 component vectors
+ row = [
+ new Vector4(), new Vector4(), new Vector4()
+ ];
+
+ for (i = 1; i <= 3; i++)
+ {
+ row[i-1].x = matrix['m'+i+'1'];
+ row[i-1].y = matrix['m'+i+'2'];
+ row[i-1].z = matrix['m'+i+'3'];
+ }
+
+ // Compute X scale factor and normalize first row.
+ scale = new Vector4();
+ skew = new Vector4();
+
+ scale.x = row[0].length();
+ row[0] = row[0].normalise();
+
+ // Compute XY shear factor and make 2nd row orthogonal to 1st.
+ skew.x = row[0].dot(row[1]);
+ row[1] = row[1].combine(row[0], 1.0, -skew.x);
+
+ // Now, compute Y scale and normalize 2nd row.
+ scale.y = row[1].length();
+ row[1] = row[1].normalise();
+ skew.x /= scale.y;
+
+ // Compute XZ and YZ shears, orthogonalize 3rd row
+ skew.y = row[0].dot(row[2]);
+ row[2] = row[2].combine(row[0], 1.0, -skew.y);
+ skew.z = row[1].dot(row[2]);
+ row[2] = row[2].combine(row[1], 1.0, -skew.z);
+
+ // Next, get Z scale and normalize 3rd row.
+ scale.z = row[2].length();
+ row[2] = row[2].normalise();
+ skew.y /= scale.z;
+ skew.y /= scale.z;
+
+ // At this point, the matrix (in rows) is orthonormal.
+ // Check for a coordinate system flip. If the determinant
+ // is -1, then negate the matrix and the scaling factors.
+ pdum3 = row[1].cross(row[2])
+ if (row[0].dot(pdum3) < 0)
+ {
+ for (i = 0; i < 3; i++)
+ {
+ scale.x *= -1;
+ row[i].x *= -1;
+ row[i].y *= -1;
+ row[i].z *= -1;
+ }
+ }
+
+ // Now, get the rotations out
+ rotate = new Vector4();
+ rotate.y = Math.asin(-row[0].z);
+ if (Math.cos(rotate.y) != 0)
+ {
+ rotate.x = Math.atan2(row[1].z, row[2].z);
+ rotate.z = Math.atan2(row[0].y, row[0].x);
+ }
+ else
+ {
+ rotate.x = Math.atan2(-row[2].x, row[1].y);
+ rotate.z = 0;
+ }
+
+ return new CSSMatrixDecomposed({
+ perspective: perspective,
+ translate: translate,
+ skew: skew,
+ scale: scale,
+ rotate: rotate
+ });
+};
\ No newline at end of file
diff --git a/js/photon.min.js b/js/photon.min.js
new file mode 100644
index 0000000..8c715a6
--- /dev/null
+++ b/js/photon.min.js
@@ -0,0 +1,9 @@
+/*
+ * Photon
+ * http://photon.attasi.com
+ *
+ * Licensed under the MIT license.
+ * Copyright 2012 Tom Giannattasio
+ */
+
+var Photon={version:"0.0.1",degToRad:function(a){return a*Math.PI/180},radToDeg:function(a){return a*180/Math.PI},getRotationVector:function(b,a){var e=b.rotate(a.x,Line.create([0,0,0],[1,0,0]));var c=e.rotate(a.y,Line.create([0,0,0],[0,1,0]));var d=c.rotate(a.z,Line.create([0,0,0],[0,0,1]));return d},buildMatrix:function(b){var a=new WebKitCSSMatrix(b);a.m11=a.m11*10000000000000000;a.m12=a.m12*10000000000000000;a.m13=a.m13*10000000000000000;a.m14=a.m14*10000000000000000;a.m21=a.m21*10000000000000000;a.m22=a.m22*10000000000000000;a.m23=a.m23*10000000000000000;a.m24=a.m24*10000000000000000;a.m31=a.m31*10000000000000000;a.m32=a.m32*10000000000000000;a.m33=a.m33*10000000000000000;a.m34=a.m34*10000000000000000;a.m41=a.m41*10000000000000000;a.m42=a.m42*10000000000000000;a.m43=a.m43*10000000000000000;a.m44=a.m44*10000000000000000;return a}};Photon.Light=function(c,b,a){this.moveTo(c||0,b||0,a||100);this.calculateVector()};Photon.Light.prototype={moveTo:function(a,c,b){this.x=a;this.y=c;this.z=b;this.calculateVector()},calculateVector:function(){this.magnitude=Math.sqrt((this.x*this.x)+(this.y*this.y)+(this.z*this.z));this.vector=$V([this.x/this.magnitude,this.y/this.magnitude,this.z/this.magnitude])}};Photon.Face=function(d,b,a,c){this.element=d;this.maxShade=b||0.5;this.maxTint=a||0;this.isBackfaced=c||false;this.shaderElement=new Photon.ShaderElement(this.element);this.element.insertBefore(this.shaderElement,this.element.firstChild);this.getRotations()};Photon.Face.prototype={getRotations:function(){var b=window.getComputedStyle(this.element).webkitTransform||"matrix3d(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)";this.matrix=Photon.buildMatrix(b);var a=this.matrix.decompose();this.rotations={x:a.rotate.x,y:a.rotate.y,z:a.rotate.z};this.vector=Photon.getRotationVector($V([0,0,1]),this.rotations)},render:function(b,h,g){if(h){this.getRotations()}var e;if(g){e=Photon.getRotationVector(this.vector,g)}else{e=this.vector}this.angleFrom=radToDeg(b.vector.angleFrom(e));var f;var d=this.isBackfaced?this.angleFrom/180:this.angleFrom/90;if(this.isBackfaced&&d>0.5){d=1-d}var c=Math.abs(this.maxShade+this.maxTint);var a=c*d;this.rangedPercentage=a;if(a<=this.maxTint){f="rgba(255, 255, 255, "+Math.abs(this.maxTint-a)+")"}else{f="rgba(0, 0, 0, "+Math.abs(a-this.maxTint)+")"}this.shaderElement.style.background=f},setMaxShade:function(a){this.maxShade=a},setMaxTint:function(a){this.maxTint=a}};Photon.ShaderElement=function(a){var b=document.createElement("div");b.className="photon-shader";b.style.position="absolute";b.style.top="0";b.style.left="0";b.style.width=window.getComputedStyle(a).width;b.style.height=window.getComputedStyle(a).height;return b};Photon.FaceGroup=function(f,a,c,b,d){this.element=f;this.faces=[];var g;if(a){g=a}else{g=f.children()}for(var e=0;e1){b=1}return Math.acos(b)},dot:function(b){var a=b.elements||b;var c,d=0,e=this.elements.length;if(e!=a.length){return null}do{d+=this.elements[e-1]*a[e-1]}while(--e);return d},rotate:function(c,e){var b,d,a,h,g;switch(this.elements.length){case 2:b=e.elements||e;if(b.length!=2){return null}d=Matrix.Rotation(c).elements;a=this.elements[0]-b[0];h=this.elements[1]-b[1];return Vector.create([b[0]+d[0][0]*a+d[0][1]*h,b[1]+d[1][0]*a+d[1][1]*h]);break;case 3:if(!e.direction){return null}var f=e.pointClosestTo(this).elements;d=Matrix.Rotation(c,e.direction).elements;a=this.elements[0]-f[0];h=this.elements[1]-f[1];g=this.elements[2]-f[2];return Vector.create([f[0]+d[0][0]*a+d[0][1]*h+d[0][2]*g,f[1]+d[1][0]*a+d[1][1]*h+d[1][2]*g,f[2]+d[2][0]*a+d[2][1]*h+d[2][2]*g]);break;default:return null}},setElements:function(a){this.elements=(a.elements||a).slice();return this}};Vector.create=function(b){var a=new Vector();return a.setElements(b)};var $V=Vector.create;function Line(){}Line.prototype={distanceFrom:function(e){if(e.normal){return e.distanceFrom(this)}if(e.direction){if(this.isParallelTo(e)){return this.distanceFrom(e.anchor)}var k=this.direction.cross(e.direction).toUnitVector().elements;var c=this.anchor.elements,b=e.anchor.elements;return Math.abs((c[0]-b[0])*k[0]+(c[1]-b[1])*k[1]+(c[2]-b[2])*k[2])}else{var f=e.elements||e;var c=this.anchor.elements,a=this.direction.elements;var n=f[0]-c[0],l=f[1]-c[1],g=(f[2]||0)-c[2];var m=Math.sqrt(n*n+l*l+g*g);if(m===0){return 0}var h=(n*a[0]+l*a[1]+g*a[2])/m;var d=1-h*h;return Math.abs(m*Math.sqrt(d<0?0:d))}},contains:function(a){var b=this.distanceFrom(a);return(b!==null&&b<=Sylvester.precision)},pointClosestTo:function(s){if(s.direction){if(this.intersects(s)){return this.intersectionWith(s)}if(this.isParallelTo(s)){return null}var u=this.direction.elements,t=s.direction.elements;var f=u[0],e=u[1],c=u[2],q=t[0],o=t[1],m=t[2];var r=(c*q-f*m),p=(f*o-e*q),n=(e*m-c*o);var l=Vector.create([r*m-p*o,p*q-n*m,n*o-r*q]);var h=Plane.create(s.anchor,l);return h.intersectionWith(this)}else{var h=s.elements||s;if(this.contains(h)){return Vector.create(h)}var v=this.anchor.elements,u=this.direction.elements;var f=u[0],e=u[1],c=u[2],d=v[0],b=v[1],a=v[2];var r=f*(h[1]-b)-e*(h[0]-d),p=e*((h[2]||0)-a)-c*(h[1]-b),n=c*(h[0]-d)-f*((h[2]||0)-a);var g=Vector.create([e*r-c*n,c*p-f*r,f*n-e*p]);var w=this.distanceFrom(h)/g.modulus();return Vector.create([h[0]+g.elements[0]*w,h[1]+g.elements[1]*w,(h[2]||0)+g.elements[2]*w])}},rotate:function(p,q){if(typeof(q.direction)=="undefined"){q=Line.create(q.to3D(),Vector.k)}var g=Matrix.Rotation(p,q.direction).elements;var b=q.pointClosestTo(this.anchor).elements;var d=this.anchor.elements,a=this.direction.elements;var l=b[0],k=b[1],h=b[2],f=d[0],e=d[1],c=d[2];var o=f-l,n=e-k,m=c-h;return Line.create([l+g[0][0]*o+g[0][1]*n+g[0][2]*m,k+g[1][0]*o+g[1][1]*n+g[1][2]*m,h+g[2][0]*o+g[2][1]*n+g[2][2]*m],[g[0][0]*a[0]+g[0][1]*a[1]+g[0][2]*a[2],g[1][0]*a[0]+g[1][1]*a[1]+g[1][2]*a[2],g[2][0]*a[0]+g[2][1]*a[1]+g[2][2]*a[2]])},setVectors:function(a,c){a=Vector.create(a);c=Vector.create(c);if(a.elements.length==2){a.elements.push(0)}if(c.elements.length==2){c.elements.push(0)}if(a.elements.length>3||c.elements.length>3){return null}var b=c.modulus();if(b===0){return null}this.anchor=a;this.direction=Vector.create([c.elements[0]/b,c.elements[1]/b,c.elements[2]/b]);return this}};Line.create=function(b,c){var a=new Line();return a.setVectors(b,c)};function Matrix(){}Matrix.prototype={setElements:function(h){var m,a=h.elements||h;if(typeof(a[0][0])!="undefined"){var d=a.length,f=d,b,c,l;this.elements=[];do{m=f-d;b=a[m].length;c=b;this.elements[m]=[];do{l=c-b;this.elements[m][l]=a[m][l]}while(--b)}while(--d);return this}var e=a.length,g=e;this.elements=[];do{m=g-e;this.elements.push([a[m]])}while(--e);return this}};Matrix.create=function(a){var b=new Matrix();return b.setElements(a)};Matrix.Rotation=function(b,k){if(!k){return Matrix.create([[Math.cos(b),-Math.sin(b)],[Math.sin(b),Math.cos(b)]])}var d=k.dup();if(d.elements.length!=3){return null}var h=d.modulus();var l=d.elements[0]/h,g=d.elements[1]/h,f=d.elements[2]/h;var n=Math.sin(b),e=Math.cos(b),m=1-e;return Matrix.create([[m*l*l+e,m*l*g-n*f,m*l*f+n*g],[m*l*g+n*f,m*g*g+e,m*g*f-n*l],[m*l*f-n*g,m*g*f+n*l,m*f*f+e]])};var CSSMatrixDecomposed=function(c){c===undefined?c={}:null;var b={perspective:null,translate:null,skew:null,scale:null,rotate:null};for(var a in b){this[a]=c[a]?c[a]:new Vector4()}this.tween=function(d,f,k){if(k===undefined){k=function(e){return e}}if(!d){d=new CSSMatrixDecomposed(new WebKitCSSMatrix().decompose())}var l=new CSSMatrixDecomposed(),h=index=null,g="";f=k(f);for(index in b){for(h in {x:"x",y:"y",z:"z",w:"w"}){l[index][h]=(this[index][h]+(d[index][h]-this[index][h])*f).toFixed(5)}}g="matrix3d(1,0,0,0, 0,1,0,0, 0,0,1,0, "+l.perspective.x+", "+l.perspective.y+", "+l.perspective.z+", "+l.perspective.w+") translate3d("+l.translate.x+"px, "+l.translate.y+"px, "+l.translate.y+"px) rotateX("+l.rotate.x+"rad) rotateY("+l.rotate.y+"rad) rotateZ("+l.rotate.z+"rad) matrix3d(1,0,0,0, 0,1,0,0, 0,"+l.skew.z+",1,0, 0,0,0,1) matrix3d(1,0,0,0, 0,1,0,0, "+l.skew.y+",0,1,0, 0,0,0,1) matrix3d(1,0,0,0, "+l.skew.x+",1,0,0, 0,0,1,0, 0,0,0,1) scale3d("+l.scale.x+", "+l.scale.y+", "+l.scale.z+")";try{l=new WebKitCSSMatrix(g);return l}catch(m){console.error("Invalid matrix string: "+g);return""}}};var Vector4=function(a,d,c,b){this.x=a?a:0;this.y=d?d:0;this.z=c?c:0;this.w=b?b:0;this.checkValues=function(){this.x=this.x?this.x:0;this.y=this.y?this.y:0;this.z=this.z?this.z:0;this.w=this.w?this.w:0};this.length=function(){this.checkValues();return Math.sqrt(this.x*this.x+this.y*this.y+this.z*this.z)};this.normalise=function(){var e=this.length(),f=new Vector4(this.x/e,this.y/e,this.z/e);return f};this.dot=function(e){return this.x*e.x+this.y*e.y+this.z*e.z+this.w*e.w};this.cross=function(e){return new Vector4(this.y*e.z-this.z*e.y,this.z*e.x-this.x*e.z,this.x*e.y-this.y*e.x)};this.combine=function(g,f,e){return new Vector4((f*this.x)+(e*g.x),(f*this.y)+(e*g.y),(f*this.z)+(e*g.z))}};WebKitCSSMatrix.prototype.determinant=function(){return this.m14*this.m23*this.m32*this.m41-this.m13*this.m24*this.m32*this.m41-this.m14*this.m22*this.m33*this.m41+this.m12*this.m24*this.m33*this.m41+this.m13*this.m22*this.m34*this.m41-this.m12*this.m23*this.m34*this.m41-this.m14*this.m23*this.m31*this.m42+this.m13*this.m24*this.m31*this.m42+this.m14*this.m21*this.m33*this.m42-this.m11*this.m24*this.m33*this.m42-this.m13*this.m21*this.m34*this.m42+this.m11*this.m23*this.m34*this.m42+this.m14*this.m22*this.m31*this.m43-this.m12*this.m24*this.m31*this.m43-this.m14*this.m21*this.m32*this.m43+this.m11*this.m24*this.m32*this.m43+this.m12*this.m21*this.m34*this.m43-this.m11*this.m22*this.m34*this.m43-this.m13*this.m22*this.m31*this.m44+this.m12*this.m23*this.m31*this.m44+this.m13*this.m21*this.m32*this.m44-this.m11*this.m23*this.m32*this.m44-this.m12*this.m21*this.m33*this.m44+this.m11*this.m22*this.m33*this.m44};WebKitCSSMatrix.prototype.decompose=function(){var a=new WebKitCSSMatrix(this.toString()),b=rightHandSide=inversePerspectiveMatrix=transposedInversePerspectiveMatrix=perspective=translate=row=i=scale=skew=pdum3=rotate=null;if(a.m33==0){return new CSSMatrixDecomposed(new WebKitCSSMatrix().decompose())}for(i=1;i<=4;i++){for(j=1;j<=4;j++){a["m"+i+j]/=a.m44}}b=a;for(i=1;i<=3;i++){b["m"+i+"4"]=0}b.m44=1;if(b.determinant()==0){return new CSSMatrixDecomposed(new WebKitCSSMatrix().decompose())}if(a.m14!=0||a.m24!=0||a.m34!=0){rightHandSide=new Vector4(a.m14,a.m24,a.m34,a.m44);inversePerspectiveMatrix=b.inverse();transposedInversePerspectiveMatrix=inversePerspectiveMatrix.transpose();perspective=transposedInversePerspectiveMatrix.transformVector(rightHandSide);a.m14=a.m24=a.m34=0;a.m44=1}else{perspective=new Vector4(0,0,0,1)}translate=new Vector4(a.m41,a.m42,a.m43);a.m41=0;a.m42=0;a.m43=0;row=[new Vector4(),new Vector4(),new Vector4()];for(i=1;i<=3;i++){row[i-1].x=a["m"+i+"1"];row[i-1].y=a["m"+i+"2"];row[i-1].z=a["m"+i+"3"]}scale=new Vector4();skew=new Vector4();scale.x=row[0].length();row[0]=row[0].normalise();skew.x=row[0].dot(row[1]);row[1]=row[1].combine(row[0],1,-skew.x);scale.y=row[1].length();row[1]=row[1].normalise();skew.x/=scale.y;skew.y=row[0].dot(row[2]);row[2]=row[2].combine(row[0],1,-skew.y);skew.z=row[1].dot(row[2]);row[2]=row[2].combine(row[1],1,-skew.z);scale.z=row[2].length();row[2]=row[2].normalise();skew.y/=scale.z;skew.y/=scale.z;pdum3=row[1].cross(row[2]);if(row[0].dot(pdum3)<0){for(i=0;i<3;i++){scale.x*=-1;row[i].x*=-1;row[i].y*=-1;row[i].z*=-1}}rotate=new Vector4();rotate.y=Math.asin(-row[0].z);if(Math.cos(rotate.y)!=0){rotate.x=Math.atan2(row[1].z,row[2].z);rotate.z=Math.atan2(row[0].y,row[0].x)}else{rotate.x=Math.atan2(-row[2].x,row[1].y);rotate.z=0}return new CSSMatrixDecomposed({perspective:perspective,translate:translate,skew:skew,scale:scale,rotate:rotate})};
\ No newline at end of file
