forked from lxm_flutter/FlutterUnit
89 lines
2.2 KiB
Dart
89 lines
2.2 KiB
Dart
import 'dart:math';
|
|
import 'package:flutter/material.dart';
|
|
|
|
import 'matrix4_shower.dart';
|
|
|
|
/// create by 张风捷特烈 on 2020-04-19
|
|
/// contact me by email 1981462002@qq.com
|
|
/// 说明:
|
|
|
|
// {
|
|
// "widgetId": 78,
|
|
// "name": '斜切变换skew',
|
|
// "priority": 1,
|
|
// "subtitle": "斜切x由R0C1数控制,入参为弧度值,表示斜切角度\n"
|
|
// "斜切y由R1C0数控制,入参为弧度值,表示斜切角度",
|
|
// }
|
|
class SkewTransform extends StatefulWidget {
|
|
const SkewTransform({Key? key}) : super(key: key);
|
|
|
|
@override
|
|
_SkewTransformState createState() => _SkewTransformState();
|
|
}
|
|
|
|
class _SkewTransformState extends State<SkewTransform> {
|
|
late Matrix4 _m4;
|
|
double _alpha = 0;
|
|
double _beta = 0;
|
|
|
|
@override
|
|
void initState() {
|
|
_m4 = Matrix4.identity();
|
|
super.initState();
|
|
}
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return Column(
|
|
children: <Widget>[
|
|
Row(
|
|
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
|
|
children: <Widget>[_buildTransform(), Matrix4Shower(_m4)],
|
|
),
|
|
_buildSliders()
|
|
],
|
|
);
|
|
}
|
|
|
|
Widget _buildTransform() {
|
|
_m4 = Matrix4.skew(_alpha, _beta);
|
|
return Transform(
|
|
transform: _m4,
|
|
child: Container(
|
|
color: Colors.cyanAccent,
|
|
width: 100,
|
|
height: 100,
|
|
child: Image.asset(
|
|
'assets/images/wy_300x200.webp',
|
|
fit: BoxFit.cover,
|
|
)),
|
|
);
|
|
}
|
|
|
|
Widget _buildSliders() => Column(
|
|
children: <Widget>[
|
|
Slider(
|
|
min: -pi,
|
|
max: pi,
|
|
value: _alpha,
|
|
divisions: 360,
|
|
label: 'alpha:' + (_alpha * 180 / pi).toStringAsFixed(1) + "°",
|
|
onChanged: (v) {
|
|
setState(() {
|
|
_alpha = v;
|
|
});
|
|
}),
|
|
Slider(
|
|
min: -pi,
|
|
max: pi,
|
|
value: _beta,
|
|
divisions: 360,
|
|
label: 'beta:' + (_beta * 180 / pi).toStringAsFixed(1) + "°",
|
|
onChanged: (v) {
|
|
setState(() {
|
|
_beta = v;
|
|
});
|
|
})
|
|
],
|
|
);
|
|
} |