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fix viewport scroll limits

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This commit is contained in:
Paul Chote
2011-07-22 22:27:13 +12:00
parent 0bfc9a957f
commit 8516fa8748
1 changed files with 17 additions and 11 deletions
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28
OpenRA.Game/Graphics/Viewport.cs
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@@ -32,7 +32,7 @@ namespace OpenRA.Graphics
readonly int2 screenSize;
int2 scrollPosition;
readonly Renderer renderer;
readonly Rectangle adjustedMapBounds;
readonly Rectangle scrollLimits;
// Top-left of the viewport, in world-px units
public float2 Location { get { return scrollPosition; } }
@@ -77,16 +77,16 @@ namespace OpenRA.Graphics
int2 NormalizeScrollPosition(int2 newScrollPosition)
{
return newScrollPosition.Clamp(adjustedMapBounds);
return newScrollPosition.Clamp(scrollLimits);
}
public ScrollDirection GetBlockedDirections()
{
var ret = ScrollDirection.None;
if(scrollPosition.Y <= adjustedMapBounds.Top) ret |= ScrollDirection.Up;
if(scrollPosition.X <= adjustedMapBounds.Left) ret |= ScrollDirection.Left;
if(scrollPosition.Y >= adjustedMapBounds.Bottom) ret |= ScrollDirection.Down;
if(scrollPosition.X >= adjustedMapBounds.Right) ret |= ScrollDirection.Right;
if(scrollPosition.Y <= scrollLimits.Top) ret |= ScrollDirection.Up;
if(scrollPosition.X <= scrollLimits.Left) ret |= ScrollDirection.Left;
if(scrollPosition.Y >= scrollLimits.Bottom) ret |= ScrollDirection.Down;
if(scrollPosition.X >= scrollLimits.Right) ret |= ScrollDirection.Right;
return ret;
}
@@ -94,11 +94,17 @@ namespace OpenRA.Graphics
{
this.screenSize = screenSize;
this.renderer = renderer;
adjustedMapBounds = new Rectangle(Game.CellSize*mapBounds.X - screenSize.X/2,
Game.CellSize*mapBounds.Y - screenSize.Y/2,
Game.CellSize*mapBounds.Width,
Game.CellSize*mapBounds.Height);
scrollPosition = new int2(adjustedMapBounds.Location) + new int2(adjustedMapBounds.Size)/2;
var viewTL = (Game.CellSize*new float2(mapBounds.Left, mapBounds.Top)).ToInt2();
var viewBR = (Game.CellSize*new float2(mapBounds.Right, mapBounds.Bottom)).ToInt2();
var border = (.5f/Zoom * screenSize.ToFloat2()).ToInt2();
scrollLimits = Rectangle.FromLTRB(viewTL.X - border.X,
viewTL.Y - border.Y,
viewBR.X - border.X,
viewBR.Y - border.Y);
scrollPosition = new int2(scrollLimits.Location) + new int2(scrollLimits.Size)/2;
}
public void DrawRegions( WorldRenderer wr, IInputHandler inputHandler )