Unity 8
BezierCurve.qml
1 /*
2  * Copyright (C) 2016 Canonical, Ltd.
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; version 3.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15  */
16 
17 import QtQuick 2.12
18 import Ubuntu.Components 1.3
19 import QtQuick.Window 2.2
20 import 'cubic-bezier.js' as Bezier
21 import 'KeySpline.js' as KeySpline
22 
23 Item {
24  id: root
25 
26  property var controlPoint1: {'x':0, 'y':0}
27  property var controlPoint2: {'x':0, 'y':0}
28  property var controlPoint3: {'x':0.58, 'y':1}
29  property var controlPoint4: {'x':1, 'y':1}
30 
31  function getValues(t) {
32  if (t<0) t=0
33  else if (t>1)t=1
34 
35  return Bezier.getBezier(t, controlPoint1, controlPoint2, controlPoint3, controlPoint4)
36  }
37 
38  function getYFromX(x) {
39  var spline = new KeySpline.keySpline(controlPoint2.x, controlPoint2.y, controlPoint3.x, controlPoint3.y)
40  if (x<0) x=0
41  else if (x>1)x=1
42 
43  return spline.get(x)
44  }
45 }