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This commit is contained in:
toly
2023-12-21 22:06:28 +08:00
parent 8b846f86d3
commit 2f4e8d3564
62 changed files with 6651 additions and 92 deletions
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1
packages/idraw/lib/p13/p13.dart Normal file
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export 'p13_page.dart';

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packages/idraw/lib/p13/p13_page.dart Normal file
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import 'package:flutter/material.dart';
import 'package:components/components.dart';
import 's01.dart' as s1;
import 's02.dart' as s2;
import 's03.dart' as s3;
import 's04.dart' as s4;
class P13Page extends StatelessWidget {
const P13Page({super.key});
@override
Widget build(BuildContext context) {
return const DemoShower(
srcCodeDir: 'draw/p13',
demos: [
s1.Paper(),
s2.Paper(),
s3.Paper(),
s4.Paper(),
],
);
}
}

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packages/idraw/lib/p13/s01.dart Normal file
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import 'dart:math';
import 'dart:ui';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'dart:ui'as ui;
import '../components/coordinate_pro.dart';
/// create by 张风捷特烈 on 2020/5/1
/// contact me by email 1981462002@qq.com
/// 说明:
class Paper extends StatelessWidget {
const Paper({super.key});
@override
Widget build(BuildContext context) {
return Container(
color: Colors.white,
child: CustomPaint(
// 使用CustomPaint
painter: PaperPainter(),
),
);
}
}
class PaperPainter extends CustomPainter {
final Coordinate coordinate = Coordinate();
final List<Offset> points = [];
final double step = 1;
final double min = 0;
final double max = 360;
void initPoints() {
for (double x = min; x <= max; x += step) {
points.add(Offset(x, f(x)));
// double thta = (pi / 180 * x);
// var p = f(thta);
// points.add(Offset(p * cos(thta), p * sin(thta)));
}
}
void initPointsWithPolar() {
for (double x = min; x <= max; x += step) {
double thta = (pi / 180 * x); // 角度转化为弧度
var p = f(thta);
points.add(Offset(p * cos(thta), p * sin(thta)));
}
}
// double f(double x) {
// double y = -x * x / 200 + 100;
// return y;
// }
// double f(double thta) {
// double p = 10 * thta;
// return p;
// }
// double f(double thta) {
// double p = 100 * (1-cos(thta));
// return p;
// }
// double f(double thta) {
// double p = 150*sin(5*thta).abs();
// return p;
// }
double f(double thta) { // 100*(1-4*sinθ)
double p = 50*(pow(e,cos(thta)) - 2 * cos(4 * thta) +pow(sin(thta / 12), 5));
return p;
}
@override
void paint(Canvas canvas, Size size) {
coordinate.paint(canvas, size);
canvas.translate(size.width / 2, size.height / 2);
// initPoints();
initPointsWithPolar();
Path path = Path();
Paint paint = Paint()
..color = Colors.red
..strokeWidth = 1.5
..style = PaintingStyle.stroke;
var colors = [
Color(0xFFF60C0C),
Color(0xFFF3B913),
Color(0xFFE7F716),
Color(0xFF3DF30B),
Color(0xFF0DF6EF),
Color(0xFF0829FB),
Color(0xFFB709F4),
];
var pos = [1.0 / 7, 2.0 / 7, 3.0 / 7, 4.0 / 7, 5.0 / 7, 6.0 / 7, 1.0];
paint.shader = ui.Gradient.linear(
Offset(0, 0), Offset(100, 0), colors, pos,TileMode.mirror);
// canvas.drawPoints(PointMode.points, points, paint);
canvas.drawPoints(PointMode.polygon, points, paint);
}
@override
bool shouldRepaint(CustomPainter oldDelegate) => false;
}

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packages/idraw/lib/p13/s02.dart Normal file
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import 'dart:math';
import 'dart:ui';
import 'package:flutter/material.dart';
import 'dart:ui'as ui;
import '../components/coordinate_pro.dart';
/// create by 张风捷特烈 on 2020/5/1
/// contact me by email 1981462002@qq.com
/// 说明:
class Paper extends StatelessWidget{
const Paper({super.key});
@override
Widget build(BuildContext context) {
return Container(
color: Colors.white,
child: CustomPaint(
// 使用CustomPaint
painter: PaperPainter(),
),
);
}
}
class PaperPainter extends CustomPainter {
final Coordinate coordinate = Coordinate();
final List<Offset> points = [];
final double step = 6;
final double min = -240;
final double max = 240;
void initPoints() {
for (double x = min; x < max; x += step) {
points.add(Offset(x, f(x)));
}
points.add(Offset(max, f(max)));
points.add(Offset(max, f(max)));
}
void initPointsWithPolar() {
for (double x = min; x < max; x += step) {
double thta = (pi / 180 * x); // 角度转化为弧度
var p = f(thta);
points.add(Offset(p * cos(thta), p * sin(thta)));
}
}
// double f(double x) {
// double y = -x * x / 200 + 100;
// return y;
// }
// double f(double thta) {
// double p = 10 * thta;
// return p;
// }
// double f(double thta) {
// double p = 100 * (1-cos(thta));
// return p;
// }
// double f(double thta) {
// double p = 150*sin(5*thta).abs();
// return p;
// }
double f(double thta) { // 100*(1-4*sinθ)
double p = 50*(pow(e,cos(thta)) - 2 * cos(4 * thta) +pow(sin(thta / 12), 5));
return p;
}
@override
void paint(Canvas canvas, Size size) {
coordinate.paint(canvas, size);
canvas.translate(size.width / 2, size.height / 2);
// initPoints();
initPointsWithPolar();
Paint paint = Paint()
..color = Colors.red
..strokeWidth = 1.5
..style = PaintingStyle.stroke;
var colors = [
Color(0xFFF60C0C),
Color(0xFFF3B913),
Color(0xFFE7F716),
Color(0xFF3DF30B),
Color(0xFF0DF6EF),
Color(0xFF0829FB),
Color(0xFFB709F4),
];
var pos = [1.0 / 7, 2.0 / 7, 3.0 / 7, 4.0 / 7, 5.0 / 7, 6.0 / 7, 1.0];
paint.shader = ui.Gradient.linear(
Offset(0, 0), Offset(100, 0), colors, pos,TileMode.mirror);
Offset p1 = points[0];
Path path = Path()..moveTo(p1.dx, p1.dy);
for (var i = 1; i < points.length-1; i++) {
double xc = (points[i].dx + points[i + 1].dx) / 2;
double yc = (points[i].dy + points[i + 1].dy) / 2;
Offset p2 = points[i];
path.quadraticBezierTo(p2.dx, p2.dy, xc, yc);
}
canvas.drawPath(path, paint);
// canvas.drawPoints(PointMode.points, points, paint..shader=null..strokeWidth=3);
// canvas.drawPoints(PointMode.polygon, points, paint..shader=null..strokeWidth=1..color=Colors.blue);
}
@override
bool shouldRepaint(CustomPainter oldDelegate) => false;
}

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packages/idraw/lib/p13/s03.dart Normal file
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import 'dart:math';
import 'dart:ui';
import 'package:flutter/material.dart';
import 'dart:ui' as ui;
/// create by 张风捷特烈 on 2020/5/1
/// contact me by email 1981462002@qq.com
/// 说明:
class Paper extends StatefulWidget {
const Paper({super.key});
@override
_PaperState createState() => _PaperState();
}
class _PaperState extends State<Paper> with SingleTickerProviderStateMixin {
late AnimationController _controller;
@override
void initState() {
super.initState();
_controller = AnimationController(
duration: const Duration(seconds: 15),
vsync: this,
)..repeat()
;
}
@override
void dispose() {
_controller.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Container(
color: Colors.white,
child: CustomPaint(
painter: PaperPainter(_controller),
),
);
}
}
class PaperPainter extends CustomPainter {
// final Coordinate coordinate = Coordinate();
final Animation<double> repaint;
PaperPainter(this.repaint) : super(repaint: repaint) {
initPointsWithPolar();
}
final List<Offset> points = [];
final Path path = Path();
final double step = 4;
final double min = -240;
final double max = 240;
void initPointsWithPolar() {
for (double x = min; x < max; x += step) {
double thta = (pi / 180 * x); // 角度转化为弧度
var p = f(thta);
points.add(Offset(p * cos(thta), p * sin(thta)));
}
double thta = (pi / 180 * max);
points.add(Offset(f(thta) * cos(thta), f(thta) * sin(thta)));
points.add(Offset(f(thta) * cos(thta), f(thta) * sin(thta)));
}
double f(double thta) {
double p = 150*sin(5*thta).abs();
return p;
}
@override
void paint(Canvas canvas, Size size) {
canvas.translate(size.width / 2, size.height / 2);
Paint paint = Paint()
..color = Colors.red
..strokeWidth = 1.5
..style = PaintingStyle.stroke;
var colors = [
Color(0xFFF60C0C),
Color(0xFFF3B913),
Color(0xFFE7F716),
Color(0xFF3DF30B),
Color(0xFF0DF6EF),
Color(0xFF0829FB),
Color(0xFFB709F4),
];
var pos = [1.0 / 7, 2.0 / 7, 3.0 / 7, 4.0 / 7, 5.0 / 7, 6.0 / 7, 1.0];
paint.shader = ui.Gradient.linear(
Offset(0, 0), Offset(100, 0), colors, pos, TileMode.mirror);
Offset p1 = points[0];
path.reset();
path..moveTo(p1.dx, p1.dy);
for (var i = 1; i < points.length - 1; i++) {
double xc = (points[i].dx + points[i + 1].dx) / 2;
double yc = (points[i].dy + points[i + 1].dy) / 2;
Offset p2 = points[i];
path.quadraticBezierTo(p2.dx, p2.dy, xc, yc);
}
canvas.drawPath(path, paint);
PathMetrics pms = path.computeMetrics();
pms.forEach((pm) {
Tangent? tangent = pm.getTangentForOffset(pm.length * repaint.value);
if(tangent == null) return;
canvas.drawCircle(
tangent.position, 5, Paint()..color = Colors.blue);
});
}
@override
bool shouldRepaint(PaperPainter oldDelegate) =>
oldDelegate.repaint != repaint;
}

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packages/idraw/lib/p13/s04.dart Normal file
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import 'dart:math';
import 'dart:ui';
import 'package:flutter/material.dart';
import 'dart:ui' as ui;
/// create by 张风捷特烈 on 2020/5/1
/// contact me by email 1981462002@qq.com
/// 说明:
class Paper extends StatefulWidget {
const Paper({super.key});
@override
_PaperState createState() => _PaperState();
}
class _PaperState extends State<Paper> with SingleTickerProviderStateMixin {
late AnimationController _controller;
@override
void initState() {
super.initState();
_controller = AnimationController(
duration: const Duration(seconds: 15),
vsync: this,
)..repeat()
;
}
@override
void dispose() {
_controller.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Container(
color: Colors.white,
child: CustomPaint(
painter: PaperPainter(_controller),
),
);
}
}
class PaperPainter extends CustomPainter {
final Animation<double> repaint;
PaperPainter(this.repaint) : super(repaint: repaint) {
initPointsWithPolar();
}
final List<Offset> points = [];
final Path path = Path();
final double step = 4;
final double min = 0;
final double max = 360;
void initPointsWithPolar() {
for (double x = min; x < max; x += step) {
double thta = (pi / 180 * x); // 角度转化为弧度
var p = f(thta);
points.add(Offset(p * cos(thta), p * sin(thta)));
}
double thta = (pi / 180 * max);
points.add(Offset(f(thta) * cos(thta), f(thta) * sin(thta)));
points.add(Offset(f(thta) * cos(thta), f(thta) * sin(thta)));
}
double f(double thta) {
double p = 150*sin(5*thta).abs();
return p;
}
@override
void paint(Canvas canvas, Size size) {
canvas.translate(size.width / 2, size.height / 2);
Paint paint = Paint()
..color = Colors.red
..strokeWidth = 1.5
..style = PaintingStyle.stroke;
var colors = [
Color(0xFFF60C0C),
Color(0xFFF3B913),
Color(0xFFE7F716),
Color(0xFF3DF30B),
Color(0xFF0DF6EF),
Color(0xFF0829FB),
Color(0xFFB709F4),
];
var pos = [1.0 / 7, 2.0 / 7, 3.0 / 7, 4.0 / 7, 5.0 / 7, 6.0 / 7, 1.0];
paint.shader = ui.Gradient.linear(
Offset(0, 0), Offset(100, 0), colors, pos, TileMode.mirror);
Offset p1 = points[0];
path.reset();
path..moveTo(p1.dx, p1.dy);
for (var i = 1; i < points.length - 1; i++) {
double xc = (points[i].dx + points[i + 1].dx) / 2;
double yc = (points[i].dy + points[i + 1].dy) / 2;
Offset p2 = points[i];
path.quadraticBezierTo(p2.dx, p2.dy, xc, yc);
}
PathMetrics pms = path.computeMetrics();
pms.forEach((pm) {
Tangent? tangent = pm.getTangentForOffset(pm.length * repaint.value);
if(tangent == null) return;
canvas.drawPath(pm.extractPath(0, pm.length * repaint.value), paint);
canvas.drawCircle(
tangent.position, 5, Paint()..color = Colors.blue);
});
}
@override
bool shouldRepaint(PaperPainter oldDelegate) =>
oldDelegate.repaint != repaint;
}