public override Vector?GetValue(Keyframe <Vector?> keyframe, double keyframeProgress)
{
var pathKeyframe = (PathKeyframe)keyframe;
var path = pathKeyframe.Path;
if (path == null || path.Contours.Count == 0)
{
return(keyframe.StartValue);
}
if (ValueCallback != null)
{
return(ValueCallback.GetValueInternal(pathKeyframe.StartFrame.Value, pathKeyframe.EndFrame.Value,
pathKeyframe.StartValue, pathKeyframe.EndValue, LinearCurrentKeyframeProgress,
keyframeProgress, Progress));
}
if (_pathMeasureKeyframe != pathKeyframe)
{
_pathMeasure?.Dispose();
_pathMeasure = new PathMeasure(path);
_pathMeasureKeyframe = pathKeyframe;
}
return(_pathMeasure.GetPosTan(keyframeProgress * _pathMeasure.Length));
}
protected internal override void ComputeRender(float renderProgress)
{
if (mCurrentBounds.IsEmpty)
{
return;
}
if (mMotherMovePath.IsEmpty)
{
mMotherMovePath.Set(CreateMotherMovePath());
mMotherMovePathMeasure.SetPath(mMotherMovePath, false);
mChildMovePath.Set(CreateChildMovePath());
mChildMovePathMeasure.SetPath(mChildMovePath, false);
}
//mother oval
float motherMoveProgress = MOTHER_MOVE_INTERPOLATOR.GetInterpolation(renderProgress);
mMotherMovePathMeasure.GetPosTan(GetCurrentMotherMoveLength(motherMoveProgress), mMotherPosition, null);
mMotherOvalHalfWidth = mMaxMotherOvalSize;
mMotherOvalHalfHeight = mMaxMotherOvalSize * GetMotherShapeFactor(motherMoveProgress);
//child Oval
float childMoveProgress = CHILD_MOVE_INTERPOLATOR.GetInterpolation(renderProgress);
mChildMovePathMeasure.GetPosTan(GetCurrentChildMoveLength(childMoveProgress), mChildPosition, null);
SetupChildParams(childMoveProgress);
mRotateDegrees = (int)(DensityUtil.Radian2Degrees(Math.Atan((mMotherPosition[1] - mChildPosition[1]) / (mMotherPosition[0] - mChildPosition[0]))));
mRevealCircleRadius = GetCurrentRevealCircleRadius(renderProgress);
mCurrentOvalColor = GetCurrentOvalColor(renderProgress);
mCurrentBackgroundColor = GetCurrentBackgroundColor(renderProgress);
}
public override bool OnTouchEvent(MotionEvent e)
{
var touchX = e.GetX();
var touchY = e.GetY();
PathMeasure pm = new PathMeasure(DrawPath, false);
//coordinates will be here
float[] PrevCoords = { 0f, 0f };
//get coordinates of the middle point
pm.GetPosTan(pm.Length, PrevCoords, null);
switch (e.Action)
{
case MotionEventActions.Down:
DrawPath.MoveTo(touchX, touchY);
PointerDown = true;
try { Invalidate(); } catch (ObjectDisposedException) { return(false); }
PointerEvent?.Invoke(this, new PointerEventArgs(PointerEventArgs.
PointerEventType.Down, new Point(PrevCoords[0], PrevCoords[1]),
new Point(touchX, touchY), PointerDown));
break;
case MotionEventActions.Move:
DrawPath.LineTo(touchX, touchY);
try { Invalidate(); } catch (ObjectDisposedException) { return(false); }
PointerEvent?.Invoke(this, new PointerEventArgs(PointerEventArgs.
PointerEventType.Move, new Point(PrevCoords[0], PrevCoords[1]),
new Point(touchX, touchY), PointerDown));
break;
case MotionEventActions.Up:
DrawCanvas.DrawPath(DrawPath, DrawPaint);
DrawPath.Reset();
PointerDown = false;
try { Invalidate(); } catch (ObjectDisposedException) { return(false); }
PointerEvent?.Invoke(this, new PointerEventArgs(PointerEventArgs.
PointerEventType.Up, new Point(PrevCoords[0], PrevCoords[1]),
new Point(touchX, touchY), PointerDown));
break;
case MotionEventActions.Cancel:
DrawCanvas.DrawPath(DrawPath, DrawPaint);
DrawPath.Reset();
PointerDown = false;
try { Invalidate(); } catch (ObjectDisposedException) { return(false); }
PointerEvent?.Invoke(this, new PointerEventArgs(PointerEventArgs.
PointerEventType.Cancel, new Point(PrevCoords[0], PrevCoords[1]),
new Point(touchX, touchY), PointerDown));
break;
default:
return(false);
}
return(true);
}
/**
* Returns a point on this curve at the given {@code parameter}.
* For {@code parameter} values less than .5f, the first path will drive the point.
* For {@code parameter} values greater than .5f, the second path will drive the point.
* For {@code parameter} equal to .5f, the point will be the point where the two
* internal paths connect.
*/
public void getPointOnLine(float parameter, float[] coords)
{
if (parameter <= .5f)
{
parameter *= 2;
measureFirst.GetPosTan(lengthFirst * parameter, coords, null);
}
else
{
parameter -= .5f;
parameter *= 2;
measureSecond.GetPosTan(lengthSecond * parameter, coords, null);
}
}
public override Vector2?GetValue(Keyframe <Vector2?> keyframe, float keyframeProgress)
{
var pathKeyframe = (PathKeyframe)keyframe;
var path = pathKeyframe.Path;
if (path == null || path.Contours.Count == 0)
{
return(keyframe.StartValue);
}
if (_pathMeasureKeyframe != pathKeyframe)
{
_pathMeasure = new PathMeasure(path);
_pathMeasureKeyframe = pathKeyframe;
}
return(_pathMeasure.GetPosTan(keyframeProgress * _pathMeasure.Length));
}
// Used to fetch points from given path.
private PathPoints[] getPoints(Path p)
{
//Size of 1000 indicates that, 1000 points
// would be extracted from the path
var pointArray = new PathPoints[1000];
var pm = new PathMeasure(p, false);
var length = pm.Length;
var distance = 0f;
var speed = length / 1000;
var counter = 0;
var aCoordinates = new float[2];
while ((distance < length) && (counter < 1000))
{
pm.GetPosTan(distance, aCoordinates, null);
pointArray[counter] = new PathPoints(aCoordinates[0], aCoordinates[1]);
counter++;
distance = distance + speed;
}
return(pointArray);
}
private PathPoints[] getPoints(Path path)
{
PathPoints[] pointArray = new PathPoints[100];
PathMeasure pm = new PathMeasure(path, false);
float length = pm.Length;
float distance = 0f;
float speed = length / 100;
int counter = 0;
float[] aCoordinates = new float[2];
while ((distance < length) && (counter < 100))
{
// get point from the pathMoon
pm.GetPosTan(distance, aCoordinates, null);
pointArray[counter] = new PathPoints(aCoordinates[0], aCoordinates[1]);
counter++;
distance = distance + speed;
}
return(pointArray);
}
