--- /dev/null
+if(!dojo._hasResource["dojox.math.curves"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojox.math.curves"] = true;
+dojo.provide("dojox.math.curves");
+
+dojo.mixin(dojox.math.curves, {
+ Line:function (start, end) {
+ this.start = start;
+ this.end = end;
+ this.dimensions = start.length;
+ for (var i = 0; i < start.length; i++) {
+ start[i] = Number(start[i]);
+ }
+ for (var i = 0; i < end.length; i++) {
+ end[i] = Number(end[i]);
+ }
+ this.getValue = function (n) {
+ var retVal = new Array(this.dimensions);
+ for (var i = 0; i < this.dimensions; i++) {
+ retVal[i] = ((this.end[i] - this.start[i]) * n) + this.start[i];
+ }
+ return retVal;
+ };
+ return this;
+ },
+ Bezier:function(pnts) {
+ this.getValue = function (step) {
+ if (step >= 1) {
+ return this.p[this.p.length - 1];
+ }
+ if (step <= 0) {
+ return this.p[0];
+ }
+ var retVal = new Array(this.p[0].length);
+ for (var k = 0; j < this.p[0].length; k++) {
+ retVal[k] = 0;
+ }
+ for (var j = 0; j < this.p[0].length; j++) {
+ var C = 0;
+ var D = 0;
+ for (var i = 0; i < this.p.length; i++) {
+ C += this.p[i][j] * this.p[this.p.length - 1][0] * dojox.math.bernstein(step, this.p.length, i);
+ }
+ for (var l = 0; l < this.p.length; l++) {
+ D += this.p[this.p.length - 1][0] * dojox.math.bernstein(step, this.p.length, l);
+ }
+ retVal[j] = C / D;
+ }
+ return retVal;
+ };
+ this.p = pnts;
+ return this;
+ },
+ CatmullRom:function (pnts, c) {
+ this.getValue = function (step) {
+ var percent = step * (this.p.length - 1);
+ var node = Math.floor(percent);
+ var progress = percent - node;
+ var i0 = node - 1;
+ if (i0 < 0) {
+ i0 = 0;
+ }
+ var i = node;
+ var i1 = node + 1;
+ if (i1 >= this.p.length) {
+ i1 = this.p.length - 1;
+ }
+ var i2 = node + 2;
+ if (i2 >= this.p.length) {
+ i2 = this.p.length - 1;
+ }
+ var u = progress;
+ var u2 = progress * progress;
+ var u3 = progress * progress * progress;
+ var retVal = new Array(this.p[0].length);
+ for (var k = 0; k < this.p[0].length; k++) {
+ var x1 = (-this.c * this.p[i0][k]) + ((2 - this.c) * this.p[i][k]) + ((this.c - 2) * this.p[i1][k]) + (this.c * this.p[i2][k]);
+ var x2 = (2 * this.c * this.p[i0][k]) + ((this.c - 3) * this.p[i][k]) + ((3 - 2 * this.c) * this.p[i1][k]) + (-this.c * this.p[i2][k]);
+ var x3 = (-this.c * this.p[i0][k]) + (this.c * this.p[i1][k]);
+ var x4 = this.p[i][k];
+ retVal[k] = x1 * u3 + x2 * u2 + x3 * u + x4;
+ }
+ return retVal;
+ };
+ if (!c) {
+ this.c = 0.7;
+ } else {
+ this.c = c;
+ }
+ this.p = pnts;
+ return this;
+ },
+ Arc:function (start, end, ccw){
+ function translate(a,b){
+ var c=new Array(a.length);
+ for(var i=0; i<a.length; i++){ c[i]=a[i]+b[i]; }
+ return c;
+ }
+ function invert(a){
+ var b = new Array(a.length);
+ for(var i=0; i<a.length; i++){ b[i]=-a[i]; }
+ return b;
+ }
+ var center = dojox.math.midpoint(start, end);
+ var sides = translate(invert(center), start);
+ var rad = Math.sqrt(Math.pow(sides[0], 2) + Math.pow(sides[1], 2));
+ var theta = dojox.math.radiansToDegrees(Math.atan(sides[1] / sides[0]));
+ if (sides[0] < 0){
+ theta -= 90;
+ } else {
+ theta += 90;
+ }
+ dojox.math.curves.CenteredArc.call(this, center, rad, theta, theta + (ccw ? -180 : 180));
+ },
+ CenteredArc:function (center, radius, start, end) {
+ this.center = center;
+ this.radius = radius;
+ this.start = start || 0;
+ this.end = end;
+ this.getValue = function (n) {
+ var retVal = new Array(2);
+ var theta = dojox.math.degreesToRadians(this.start + ((this.end - this.start) * n));
+ retVal[0] = this.center[0] + this.radius * Math.sin(theta);
+ retVal[1] = this.center[1] - this.radius * Math.cos(theta);
+ return retVal;
+ };
+ return this;
+ },
+ Circle:function(center, radius){
+ dojox.math.curves.CenteredArc.call(this, center, radius, 0, 360);
+ return this;
+ },
+ Path:function () {
+ var curves = [];
+ var weights = [];
+ var ranges = [];
+ var totalWeight = 0;
+ this.add = function (curve, weight) {
+ if (weight < 0) {
+ console.error("dojox.math.curves.Path.add: weight cannot be less than 0");
+ }
+ curves.push(curve);
+ weights.push(weight);
+ totalWeight += weight;
+ computeRanges();
+ };
+ this.remove = function (curve) {
+ for (var i = 0; i < curves.length; i++) {
+ if (curves[i] == curve) {
+ curves.splice(i, 1);
+ totalWeight -= weights.splice(i, 1)[0];
+ break;
+ }
+ }
+ computeRanges();
+ };
+ this.removeAll = function () {
+ curves = [];
+ weights = [];
+ totalWeight = 0;
+ };
+ this.getValue = function (n) {
+ var found = false, value = 0;
+ for (var i = 0; i < ranges.length; i++) {
+ var r = ranges[i];
+ if (n >= r[0] && n < r[1]) {
+ var subN = (n - r[0]) / r[2];
+ value = curves[i].getValue(subN);
+ found = true;
+ break;
+ }
+ }
+ if (!found) {
+ value = curves[curves.length - 1].getValue(1);
+ }
+ for (var j = 0; j < i; j++) {
+ value = dojox.math.points.translate(value, curves[j].getValue(1));
+ }
+ return value;
+ };
+ function computeRanges() {
+ var start = 0;
+ for (var i = 0; i < weights.length; i++) {
+ var end = start + weights[i] / totalWeight;
+ var len = end - start;
+ ranges[i] = [start, end, len];
+ start = end;
+ }
+ }
+ return this;
+ }
+});
+
+}
projects / eow / blobdiff