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Merge pull request #236 from Tom94/fix-carousel-panel-x

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Fix panels that are moving off-screen having an incorrect X coordinat…
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Dean Herbert 2016-12-11 19:47:09 +09:00 committed by GitHub
commit 658f203c4e
1 changed files with 32 additions and 20 deletions
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52
osu.Game/Screens/Select/CarouselContainer.cs
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@ -190,18 +190,45 @@ namespace osu.Game.Screens.Select
return 125 + x; return 125 + x;
} }
/// <summary>
/// Update a panel's x position and multiplicative alpha based on its y position and
/// the current scroll position.
/// </summary>
/// <param name="p">The panel to be updated.</param>
/// <param name="halfHeight">Half the draw height of the carousel container.</param>
private void updatePanel(Panel p, float halfHeight)
{
float panelDrawY = p.Position.Y - Current + p.DrawHeight / 2;
float dist = Math.Abs(1f - panelDrawY / halfHeight);
// Setting the origin position serves as an additive position on top of potential
// local transformation we may want to apply (e.g. when a panel gets selected, we
// may want to smoothly transform it leftwards.)
p.OriginPosition = new Vector2(-offsetX(dist, halfHeight), 0);
// We are applying a multiplicative alpha (which is internally done by nesting an
// additional container and setting that container's alpha) such that we can
// layer transformations on top, with a similar reasoning to the previous comment.
p.SetMultiplicativeAlpha(MathHelper.Clamp(1.75f - 1.5f * dist, 0, 1));
}
protected override void Update() protected override void Update()
{ {
base.Update(); base.Update();
// Determine which items stopped being on screen for future removal from the lifetimelist.
float drawHeight = DrawHeight; float drawHeight = DrawHeight;
float halfHeight = drawHeight / 2;
Lifetime.AliveItems.ForEach(delegate (Panel p) foreach (Panel p in Lifetime.AliveItems)
{ {
float panelPosY = p.Position.Y; float panelPosY = p.Position.Y;
p.IsOnScreen = panelPosY >= Current - p.DrawHeight && panelPosY <= Current + drawHeight; p.IsOnScreen = panelPosY >= Current - p.DrawHeight && panelPosY <= Current + drawHeight;
}); updatePanel(p, halfHeight);
}
// Determine range of indices for items that are now definitely on screen to be added
// to the lifetimelist in the future.
int firstIndex = yPositions.BinarySearch(Current - Panel.MAX_HEIGHT); int firstIndex = yPositions.BinarySearch(Current - Panel.MAX_HEIGHT);
if (firstIndex < 0) firstIndex = ~firstIndex; if (firstIndex < 0) firstIndex = ~firstIndex;
int lastIndex = yPositions.BinarySearch(Current + drawHeight); int lastIndex = yPositions.BinarySearch(Current + drawHeight);
@ -210,26 +237,11 @@ namespace osu.Game.Screens.Select
Lifetime.StartIndex = firstIndex; Lifetime.StartIndex = firstIndex;
Lifetime.EndIndex = lastIndex; Lifetime.EndIndex = lastIndex;
float halfHeight = drawHeight / 2;
for (int i = firstIndex; i < lastIndex; ++i) for (int i = firstIndex; i < lastIndex; ++i)
{ {
var panel = Lifetime[i]; Panel p = Lifetime[i];
p.IsOnScreen = true;
panel.IsOnScreen = true; updatePanel(p, halfHeight);
float panelDrawY = panel.Position.Y - Current + panel.DrawHeight / 2;
float dist = Math.Abs(1f - panelDrawY / halfHeight);
// Setting the origin position serves as an additive position on top of potential
// local transformation we may want to apply (e.g. when a panel gets selected, we
// may want to smoothly transform it leftwards.)
panel.OriginPosition = new Vector2(-offsetX(dist, halfHeight), 0);
// We are applying a multiplicative alpha (which is internally done by nesting an
// additional container and setting that container's alpha) such that we can
// layer transformations on top, with a similar reasoning to the previous comment.
panel.SetMultiplicativeAlpha(MathHelper.Clamp(1.75f - 1.5f * dist, 0, 1));
} }
} }
} }