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combine distance and angle for gamepad ui navigation

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Ell 2022-03-14 15:39:32 +01:00
parent 35e3896dc1
commit d5f3453c71
1 changed files with 7 additions and 4 deletions
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11
MLEM.Ui/UiControls.cs
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@ -377,17 +377,20 @@ namespace MLEM.Ui {
return children.FirstOrDefault(c => c.CanBeSelected);
} else {
Element closest = null;
float closestDistSq = 0;
float closestPriority = 0;
foreach (var child in children) {
if (!child.CanBeSelected || child == this.SelectedElement)
continue;
var (xOffset, yOffset) = child.Area.Center - this.SelectedElement.Area.Center;
if (Math.Abs(direction.Angle() - Math.Atan2(yOffset, xOffset)) >= MathHelper.PiOver2 - Element.Epsilon)
var angle = Math.Abs(direction.Angle() - (float) Math.Atan2(yOffset, xOffset));
if (angle >= MathHelper.PiOver2 - Element.Epsilon)
continue;
var distSq = child.Area.DistanceSquared(this.SelectedElement.Area);
if (closest == null || distSq < closestDistSq) {
// both distance and angle play a role in a destination button's priority, so we combine them
var priority = distSq * (angle / MathHelper.TwoPi + 1);
if (closest == null || priority < closestPriority) {
closest = child;
closestDistSq = distSq;
closestPriority = priority;
}
}
return closest;