mugiten/kanimaji-dart
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Several changes

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This commit is contained in:
Oystein Kristoffer Tveit
2022-02-01 00:13:50 +01:00
parent 1ab1f067b5
commit 4151df40b5
8 changed files with 361 additions and 266 deletions
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25
lib/kanimaji/bezier_cubic.dart
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@@ -1,15 +1,18 @@
import 'dart:math' as math;
class Point {
final double x;
final double y;
const Point(this.x, this.y);
import '../common/Point.dart';
@override
String toString() => '($x,$y)';
}
// class Point {
// final double x;
// final double y;
// const Point(this.x, this.y);
// @override
// String toString() => '($x,$y)';
// }
double thrt(double x) =>
x > 0 ? math.pow(x, 1.0 / 3).toDouble() : -math.pow(-x, 1.0 / 3).toDouble();
@@ -23,10 +26,10 @@ double cb(x) => x * x * x;
/// x(t) = t^3 T + 3t^2(1-t) U + 3t(1-t)^2 V + (1-t)^3 W
double time(Point pt1, Point ct1, Point ct2, Point pt2, double x) {
// var C = Cubic, a,b,c,d,p,q,lambda,sqlambda,tmp,addcoef,t,qb,qc,norm,angle,fact;
final double a = pt1.x - 3 * ct1.x + 3 * ct2.x - pt2.x;
final double b = 3 * ct1.x - 6 * ct2.x + 3 * pt2.x;
final double c = 3 * ct2.x - 3 * pt2.x;
final double d = pt2.x - x;
final num a = pt1.x - 3 * ct1.x + 3 * ct2.x - pt2.x;
final num b = 3 * ct1.x - 6 * ct2.x + 3 * pt2.x;
final num c = 3 * ct2.x - 3 * pt2.x;
final num d = pt2.x - x;
if (a.abs() < 0.000000001) { // quadratic
if (b.abs() < 0.000000001) return -d / c; // linear