matrix.js
资源名称:oa.rar [点击查看]
上传用户:kimgenplus
上传日期:2016-06-05
资源大小:20877k
文件大小:6k
源码类别:
OA系统
开发平台:
Java
- /*
- Copyright (c) 2004-2006, The Dojo Foundation
- All Rights Reserved.
- Licensed under the Academic Free License version 2.1 or above OR the
- modified BSD license. For more information on Dojo licensing, see:
- http://dojotoolkit.org/community/licensing.shtml
- */
- dojo.provide("dojo.gfx.matrix");
- dojo.require("dojo.lang.common");
- dojo.require("dojo.math.*");
- dojo.gfx.matrix.Matrix2D = function (arg) {
- if (arg) {
- if (arg instanceof Array) {
- if (arg.length > 0) {
- var m = dojo.gfx.matrix.normalize(arg[0]);
- for (var i = 1; i < arg.length; ++i) {
- var l = m;
- var r = dojo.gfx.matrix.normalize(arg[i]);
- m = new dojo.gfx.matrix.Matrix2D();
- m.xx = l.xx * r.xx + l.xy * r.yx;
- m.xy = l.xx * r.xy + l.xy * r.yy;
- m.yx = l.yx * r.xx + l.yy * r.yx;
- m.yy = l.yx * r.xy + l.yy * r.yy;
- m.dx = l.xx * r.dx + l.xy * r.dy + l.dx;
- m.dy = l.yx * r.dx + l.yy * r.dy + l.dy;
- }
- dojo.mixin(this, m);
- }
- } else {
- dojo.mixin(this, arg);
- }
- }
- };
- dojo.extend(dojo.gfx.matrix.Matrix2D, {xx:1, xy:0, yx:0, yy:1, dx:0, dy:0});
- dojo.mixin(dojo.gfx.matrix, {identity:new dojo.gfx.matrix.Matrix2D(), flipX:new dojo.gfx.matrix.Matrix2D({xx:-1}), flipY:new dojo.gfx.matrix.Matrix2D({yy:-1}), flipXY:new dojo.gfx.matrix.Matrix2D({xx:-1, yy:-1}), translate:function (a, b) {
- if (arguments.length > 1) {
- return new dojo.gfx.matrix.Matrix2D({dx:a, dy:b});
- }
- return new dojo.gfx.matrix.Matrix2D({dx:a.x, dy:a.y});
- }, scale:function (a, b) {
- if (arguments.length > 1) {
- return new dojo.gfx.matrix.Matrix2D({xx:a, yy:b});
- }
- if (typeof a == "number") {
- return new dojo.gfx.matrix.Matrix2D({xx:a, yy:a});
- }
- return new dojo.gfx.matrix.Matrix2D({xx:a.x, yy:a.y});
- }, rotate:function (angle) {
- var c = Math.cos(angle);
- var s = Math.sin(angle);
- return new dojo.gfx.matrix.Matrix2D({xx:c, xy:s, yx:-s, yy:c});
- }, rotateg:function (degree) {
- return dojo.gfx.matrix.rotate(dojo.math.degToRad(degree));
- }, skewX:function (angle) {
- return new dojo.gfx.matrix.Matrix2D({xy:Math.tan(angle)});
- }, skewXg:function (degree) {
- return dojo.gfx.matrix.skewX(dojo.math.degToRad(degree));
- }, skewY:function (angle) {
- return new dojo.gfx.matrix.Matrix2D({yx:-Math.tan(angle)});
- }, skewYg:function (degree) {
- return dojo.gfx.matrix.skewY(dojo.math.degToRad(degree));
- }, normalize:function (matrix) {
- return (matrix instanceof dojo.gfx.matrix.Matrix2D) ? matrix : new dojo.gfx.matrix.Matrix2D(matrix);
- }, clone:function (matrix) {
- var obj = new dojo.gfx.matrix.Matrix2D();
- for (var i in matrix) {
- if (typeof (matrix[i]) == "number" && typeof (obj[i]) == "number" && obj[i] != matrix[i]) {
- obj[i] = matrix[i];
- }
- }
- return obj;
- }, invert:function (matrix) {
- var m = dojo.gfx.matrix.normalize(matrix);
- var D = m.xx * m.yy - m.xy * m.yx;
- var M = new dojo.gfx.matrix.Matrix2D({xx:m.yy / D, xy:-m.xy / D, yx:-m.yx / D, yy:m.xx / D, dx:(m.yx * m.dy - m.yy * m.dx) / D, dy:(m.xy * m.dx - m.xx * m.dy) / D});
- return M;
- }, _multiplyPoint:function (m, x, y) {
- return {x:m.xx * x + m.xy * y + m.dx, y:m.yx * x + m.yy * y + m.dy};
- }, multiplyPoint:function (matrix, a, b) {
- var m = dojo.gfx.matrix.normalize(matrix);
- if (typeof a == "number" && typeof b == "number") {
- return dojo.gfx.matrix._multiplyPoint(m, a, b);
- }
- return dojo.gfx.matrix._multiplyPoint(m, a.x, a.y);
- }, multiply:function (matrix) {
- var m = dojo.gfx.matrix.normalize(matrix);
- for (var i = 1; i < arguments.length; ++i) {
- var l = m;
- var r = dojo.gfx.matrix.normalize(arguments[i]);
- m = new dojo.gfx.matrix.Matrix2D();
- m.xx = l.xx * r.xx + l.xy * r.yx;
- m.xy = l.xx * r.xy + l.xy * r.yy;
- m.yx = l.yx * r.xx + l.yy * r.yx;
- m.yy = l.yx * r.xy + l.yy * r.yy;
- m.dx = l.xx * r.dx + l.xy * r.dy + l.dx;
- m.dy = l.yx * r.dx + l.yy * r.dy + l.dy;
- }
- return m;
- }, _sandwich:function (m, x, y) {
- return dojo.gfx.matrix.multiply(dojo.gfx.matrix.translate(x, y), m, dojo.gfx.matrix.translate(-x, -y));
- }, scaleAt:function (a, b, c, d) {
- switch (arguments.length) {
- case 4:
- return dojo.gfx.matrix._sandwich(dojo.gfx.matrix.scale(a, b), c, d);
- case 3:
- if (typeof c == "number") {
- return dojo.gfx.matrix._sandwich(dojo.gfx.matrix.scale(a), b, c);
- }
- return dojo.gfx.matrix._sandwich(dojo.gfx.matrix.scale(a, b), c.x, c.y);
- }
- return dojo.gfx.matrix._sandwich(dojo.gfx.matrix.scale(a), b.x, b.y);
- }, rotateAt:function (angle, a, b) {
- if (arguments.length > 2) {
- return dojo.gfx.matrix._sandwich(dojo.gfx.matrix.rotate(angle), a, b);
- }
- return dojo.gfx.matrix._sandwich(dojo.gfx.matrix.rotate(angle), a.x, a.y);
- }, rotategAt:function (degree, a, b) {
- if (arguments.length > 2) {
- return dojo.gfx.matrix._sandwich(dojo.gfx.matrix.rotateg(degree), a, b);
- }
- return dojo.gfx.matrix._sandwich(dojo.gfx.matrix.rotateg(degree), a.x, a.y);
- }, skewXAt:function (angle, a, b) {
- if (arguments.length > 2) {
- return dojo.gfx.matrix._sandwich(dojo.gfx.matrix.skewX(angle), a, b);
- }
- return dojo.gfx.matrix._sandwich(dojo.gfx.matrix.skewX(angle), a.x, a.y);
- }, skewXgAt:function (degree, a, b) {
- if (arguments.length > 2) {
- return dojo.gfx.matrix._sandwich(dojo.gfx.matrix.skewXg(degree), a, b);
- }
- return dojo.gfx.matrix._sandwich(dojo.gfx.matrix.skewXg(degree), a.x, a.y);
- }, skewYAt:function (angle, a, b) {
- if (arguments.length > 2) {
- return dojo.gfx.matrix._sandwich(dojo.gfx.matrix.skewY(angle), a, b);
- }
- return dojo.gfx.matrix._sandwich(dojo.gfx.matrix.skewY(angle), a.x, a.y);
- }, skewYgAt:function (degree, a, b) {
- if (arguments.length > 2) {
- return dojo.gfx.matrix._sandwich(dojo.gfx.matrix.skewYg(degree), a, b);
- }
- return dojo.gfx.matrix._sandwich(dojo.gfx.matrix.skewYg(degree), a.x, a.y);
- }});