forked from lxm_flutter/FlutterUnit
80 lines
1.8 KiB
Dart
80 lines
1.8 KiB
Dart
import 'dart:math';
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import 'package:flutter/material.dart';
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/// create by 张风捷特烈 on 2020/4/30
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/// contact me by email 1981462002@qq.com
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/// 说明:
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// {
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// "widgetId": 78,
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// "name": '透视变换rotation',
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// "priority": 5,
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// "subtitle": "由R3C1、R3C2、R3C3控制透视",
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// }
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class R3C2 extends StatefulWidget {
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const R3C2({Key? key}) : super(key: key);
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@override
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_R3C2State createState() => _R3C2State();
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}
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class _R3C2State extends State<R3C2> {
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late Matrix4 _m4;
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double _value = 0;
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double _rad = 0;
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@override
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Widget build(BuildContext context) {
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_m4 = Matrix4.identity()
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// ..setEntry(3, 0, _value) // x
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// ..setEntry(3, 1, _value)// y
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..setEntry(3, 2, _value) // z
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..rotateY(_rad)
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// ..rotateX(_rad)
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;
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return Column(
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children: <Widget>[
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Transform(
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transform: _m4,
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child: Container(
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color: Colors.cyanAccent,
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width: 100,
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height: 100,
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child: Image.asset(
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'assets/images/wy_300x200.webp',
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fit: BoxFit.cover,
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)),
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),
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_buildSliders()
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],
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);
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}
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Widget _buildSliders() => Column(
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children: <Widget>[
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Slider(
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min: -0.01,
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max: 0.01,
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value: _value,
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divisions: 360,
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label: 'x:${_value.toStringAsFixed(5)}',
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onChanged: (v) {
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setState(() {
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_value = v;
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});
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}),
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Slider(
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min: -pi,
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max: pi,
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value: _rad,
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divisions: 360,
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label: '角度:' + (_rad * 180 / pi).toStringAsFixed(1) + "°",
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onChanged: (v) {
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setState(() {
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_rad = v;
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});
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}),
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],
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);
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} |