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Add support for polygon selection shapes.

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This commit is contained in:
Paul Chote
2020-02-29 11:03:20 +00:00
committed by atlimit8
parent 4ba50a4379
commit 88cdad4189
11 changed files with 162 additions and 35 deletions
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10
OpenRA.Game/SelectableExts.cs
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@@ -73,14 +73,18 @@ namespace OpenRA.Traits
return actors.MaxByOrDefault(a => CalculateActorSelectionPriority(a.Info, a.MouseBounds, selectionPixel, modifiers));
}
static long CalculateActorSelectionPriority(ActorInfo info, Rectangle bounds, int2 selectionPixel, Modifiers modifiers)
static long CalculateActorSelectionPriority(ActorInfo info, Polygon bounds, int2 selectionPixel, Modifiers modifiers)
{
if (bounds.IsEmpty)
return info.SelectionPriority(modifiers);
// Assume that the center of the polygon is the same as the center of the bounding box
// This isn't necessarily true for arbitrary polygons, but is fine for the hexagonal and diamond
// shapes that are currently implemented
var br = bounds.BoundingRect;
var centerPixel = new int2(
bounds.Left + bounds.Size.Width / 2,
bounds.Top + bounds.Size.Height / 2);
br.Left + br.Size.Width / 2,
br.Top + br.Size.Height / 2);
var pixelDistance = (centerPixel - selectionPixel).Length;
return info.SelectionPriority(modifiers) - (long)pixelDistance << 16;