forked from AlloyTeam/PhyTouch
-
Notifications
You must be signed in to change notification settings - Fork 0
/
transform.js
174 lines (150 loc) · 7.69 KB
/
transform.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
/* transformjs
* By dntzhang
*/
;(function () {
var Matrix3D = function (n11, n12, n13, n14, n21, n22, n23, n24, n31, n32, n33, n34, n41, n42, n43, n44) {
this.elements =window.Float32Array ? new Float32Array(16) : [];
var te = this.elements;
te[0] = (n11 !== undefined) ? n11 : 1; te[4] = n12 || 0; te[8] = n13 || 0; te[12] = n14 || 0;
te[1] = n21 || 0; te[5] = (n22 !== undefined) ? n22 : 1; te[9] = n23 || 0; te[13] = n24 || 0;
te[2] = n31 || 0; te[6] = n32 || 0; te[10] = (n33 !== undefined) ? n33 : 1; te[14] = n34 || 0;
te[3] = n41 || 0; te[7] = n42 || 0; te[11] = n43 || 0; te[15] = (n44 !== undefined) ? n44 : 1;
};
Matrix3D.DEG_TO_RAD = Math.PI / 180;
Matrix3D.prototype = {
set: function (n11, n12, n13, n14, n21, n22, n23, n24, n31, n32, n33, n34, n41, n42, n43, n44) {
var te = this.elements;
te[0] = n11; te[4] = n12; te[8] = n13; te[12] = n14;
te[1] = n21; te[5] = n22; te[9] = n23; te[13] = n24;
te[2] = n31; te[6] = n32; te[10] = n33; te[14] = n34;
te[3] = n41; te[7] = n42; te[11] = n43; te[15] = n44;
return this;
},
identity: function () {
this.set(
1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1
);
return this;
},
multiplyMatrices: function (a, be) {
var ae = a.elements;
var te = this.elements;
var a11 = ae[0], a12 = ae[4], a13 = ae[8], a14 = ae[12];
var a21 = ae[1], a22 = ae[5], a23 = ae[9], a24 = ae[13];
var a31 = ae[2], a32 = ae[6], a33 = ae[10], a34 = ae[14];
var a41 = ae[3], a42 = ae[7], a43 = ae[11], a44 = ae[15];
var b11 = be[0], b12 = be[1], b13 = be[2], b14 = be[3];
var b21 = be[4], b22 = be[5], b23 = be[6], b24 = be[7];
var b31 = be[8], b32 = be[9], b33 = be[10], b34 = be[11];
var b41 = be[12], b42 = be[13], b43 = be[14], b44 = be[15];
te[0] = a11 * b11 + a12 * b21 + a13 * b31 + a14 * b41;
te[4] = a11 * b12 + a12 * b22 + a13 * b32 + a14 * b42;
te[8] = a11 * b13 + a12 * b23 + a13 * b33 + a14 * b43;
te[12] = a11 * b14 + a12 * b24 + a13 * b34 + a14 * b44;
te[1] = a21 * b11 + a22 * b21 + a23 * b31 + a24 * b41;
te[5] = a21 * b12 + a22 * b22 + a23 * b32 + a24 * b42;
te[9] = a21 * b13 + a22 * b23 + a23 * b33 + a24 * b43;
te[13] = a21 * b14 + a22 * b24 + a23 * b34 + a24 * b44;
te[2] = a31 * b11 + a32 * b21 + a33 * b31 + a34 * b41;
te[6] = a31 * b12 + a32 * b22 + a33 * b32 + a34 * b42;
te[10] = a31 * b13 + a32 * b23 + a33 * b33 + a34 * b43;
te[14] = a31 * b14 + a32 * b24 + a33 * b34 + a34 * b44;
te[3] = a41 * b11 + a42 * b21 + a43 * b31 + a44 * b41;
te[7] = a41 * b12 + a42 * b22 + a43 * b32 + a44 * b42;
te[11] = a41 * b13 + a42 * b23 + a43 * b33 + a44 * b43;
te[15] = a41 * b14 + a42 * b24 + a43 * b34 + a44 * b44;
return this;
},
// 解决角度为90的整数倍导致Math.cos得到极小的数，其实是0。导致不渲染
_rounded: function(value,i){
i= Math.pow(10, i || 15);
// default
return Math.round(value*i)/i;
},
appendTransform: function (x, y, z, scaleX, scaleY, scaleZ, rotateX, rotateY, rotateZ,skewX,skewY, originX, originY, originZ) {
var rx = rotateX * Matrix3D.DEG_TO_RAD;
var cosx =this._rounded( Math.cos(rx));
var sinx = this._rounded(Math.sin(rx));
var ry = rotateY * Matrix3D.DEG_TO_RAD;
var cosy =this._rounded( Math.cos(ry));
var siny = this._rounded(Math.sin(ry));
var rz = rotateZ * Matrix3D.DEG_TO_RAD;
var cosz =this._rounded( Math.cos(rz * -1));
var sinz =this._rounded( Math.sin(rz * -1));
this.multiplyMatrices(this, [
1, 0, 0, x,
0, cosx, sinx, y,
0, -sinx, cosx, z,
0, 0, 0, 1
]);
this.multiplyMatrices(this, [
cosy, 0, siny, 0,
0, 1, 0, 0,
-siny, 0, cosy, 0,
0, 0, 0, 1
]);
this.multiplyMatrices(this,[
cosz * scaleX, sinz * scaleY, 0, 0,
-sinz * scaleX, cosz * scaleY, 0, 0,
0, 0, 1 * scaleZ, 0,
0, 0, 0, 1
]);
if(skewX||skewY){
this.multiplyMatrices(this,[
this._rounded(Math.cos(skewX* Matrix3D.DEG_TO_RAD)), this._rounded( Math.sin(skewX* Matrix3D.DEG_TO_RAD)), 0, 0,
-1*this._rounded(Math.sin(skewY* Matrix3D.DEG_TO_RAD)), this._rounded( Math.cos(skewY* Matrix3D.DEG_TO_RAD)), 0, 0,
0, 0, 1, 0,
0, 0, 0, 1
]);
}
if (originX || originY || originZ) {
this.elements[12] -= originX * this.elements[0] + originY * this.elements[4] + originZ * this.elements[8];
this.elements[13] -= originX * this.elements[1] + originY * this.elements[5] + originZ * this.elements[9];
this.elements[14] -= originX * this.elements[2] + originY * this.elements[6] + originZ * this.elements[10];
}
return this;
}
};
function observe(target, props, callback) {
for (var i = 0, len = props.length; i < len; i++) {
var prop = props[i];
watch(target, prop, callback);
}
}
function watch(target, prop, callback) {
Object.defineProperty(target, prop, {
get: function () {
return this["__" + prop];
},
set: function (value) {
if (value !== this["__" + prop]) {
this["__" + prop] = value;
callback();
}
}
});
}
window.Transform = function (element) {
observe(
element,
["translateX", "translateY", "translateZ", "scaleX", "scaleY", "scaleZ" , "rotateX", "rotateY", "rotateZ","skewX","skewY", "originX", "originY", "originZ"],
function () {
var mtx = element.matrix3D.identity().appendTransform( element.translateX, element.translateY, element.translateZ, element.scaleX, element.scaleY, element.scaleZ, element.rotateX, element.rotateY, element.rotateZ,element.skewX,element.skewY, element.originX, element.originY, element.originZ);
element.style.transform = element.style.msTransform = element.style.OTransform = element.style.MozTransform = element.style.webkitTransform = "perspective("+element.perspective+"px) matrix3d(" + Array.prototype.slice.call(mtx.elements).join(",") + ")";
});
observe(
element,
[ "perspective"],
function () {
element.style.transform = element.style.msTransform = element.style.OTransform = element.style.MozTransform = element.style.webkitTransform = "perspective("+element.perspective+"px) matrix3d(" + Array.prototype.slice.call(element.matrix3D.elements).join(",") + ")";
});
element.matrix3D = new Matrix3D();
element.perspective = 500;
element.scaleX = element.scaleY = element.scaleZ = 1;
//由于image自带了x\y\z，所有加上translate前缀
element.translateX = element.translateY = element.translateZ = element.rotateX = element.rotateY = element.rotateZ =element.skewX=element.skewY= element.originX = element.originY = element.originZ = 0;
}
})();