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- ConvexHulls consist of Segments and SegmentPoints which keep references to each other

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- LightSources fetch a list of non-backfacing ConvexHull segments within their range, and sort the points counter-clockwise (TODO: calculate triangles from the points)
- fixed incorrectly working CircleIntersectsRectangle method
This commit is contained in:
Regalis
2017-02-26 01:17:22 +02:00
parent bcabe4ab39
commit abfe2261d2
3 changed files with 163 additions and 50 deletions
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23
Subsurface/Source/Utils/MathUtils.cs
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@@ -276,15 +276,16 @@ namespace Barotrauma
public static bool CircleIntersectsRectangle(Vector2 circlePos, float radius, Rectangle rect)
{
float xDist = Math.Abs(circlePos.X - rect.Center.X);
float yDist = Math.Abs(circlePos.Y - rect.Center.Y);
int halfWidth = rect.Width / 2;
int halfHeight = rect.Height / 2;
if (xDist > (halfWidth + radius)) { return false; }
if (xDist <= (halfWidth)) { return true; }
if (yDist > (halfHeight + radius)) { return false; }
float yDist = Math.Abs(circlePos.Y - rect.Center.Y);
int halfHeight = rect.Height / 2;
if (yDist > (halfHeight + radius)) { return false; }
if (xDist <= (halfWidth)) { return true; }
if (yDist <= (halfHeight)) { return true; }
float distSqX = xDist - halfWidth;
@@ -475,4 +476,18 @@ namespace Barotrauma
return Math.Sign(d2 - d1);
}
}
class CompareSegmentPointCCW : IComparer<Lights.SegmentPoint>
{
private Vector2 center;
public CompareSegmentPointCCW(Vector2 center)
{
this.center = center;
}
public int Compare(Lights.SegmentPoint a, Lights.SegmentPoint b)
{
return CompareCCW.Compare(a.WorldPos, b.WorldPos, center);
}
}
}