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Merge branch 'lighting-optimization'

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This commit is contained in:
Regalis
2017-03-02 19:39:55 +02:00
parent 335ee8c72e f2db3c6b20
commit f04a00f6e1
7 changed files with 692 additions and 246 deletions
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65
Subsurface/Source/Utils/MathUtils.cs
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@@ -208,6 +208,48 @@ namespace Barotrauma
return a1 + t * b;
}
/// <summary>
/// Get the point where line segment (a1, a2) intersects the axis-aligned line segment (axisAligned1, axisAligned2)
/// </summary>
public static Vector2? GetAxisAlignedLineIntersection(Vector2 a1, Vector2 a2, Vector2 axisAligned1, Vector2 axisAligned2)
{
if (Math.Abs(axisAligned1.X - axisAligned2.X) < 1.0f)
{
if (Math.Sign(a1.X - axisAligned1.X) == Math.Sign(a2.X - axisAligned1.X))
return null;
if (Math.Max(a1.Y, a2.Y) < Math.Min(axisAligned1.Y, axisAligned2.Y))
return null;
if (Math.Min(a1.Y, a2.Y) > Math.Max(axisAligned1.Y, axisAligned2.Y))
return null;
}
else
{
if (Math.Sign(a1.Y - axisAligned1.Y) == Math.Sign(a2.Y - axisAligned1.Y))
return null;
if (Math.Max(a1.X, a2.X) < Math.Min(axisAligned1.X, axisAligned2.X))
return null;
if (Math.Min(a1.X, a2.X) > Math.Max(axisAligned1.X, axisAligned2.X))
return null;
}
Vector2 b = a2 - a1;
Vector2 d = axisAligned2 - axisAligned1;
float bDotDPerp = b.X * d.Y - b.Y * d.X;
Vector2 c = axisAligned1 - a1;
float t = (c.X * d.Y - c.Y * d.X) / bDotDPerp;
if (t < 0 || t > 1) return null;
float u = (c.X * b.Y - c.Y * b.X) / bDotDPerp;
if (u < 0 || u > 1) return null;
return a1 + t * b;
}
public static Vector2? GetLineRectangleIntersection(Vector2 a1, Vector2 a2, Rectangle rect)
{
Vector2? intersection = GetLineIntersection(a1, a2,
@@ -276,15 +318,16 @@ 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 +518,18 @@ namespace Barotrauma
return Math.Sign(d2 - d1);
}
}
class CompareSegmentPointCW : IComparer<Lights.SegmentPoint>
{
private Vector2 center;
public CompareSegmentPointCW(Vector2 center)
{
this.center = center;
}
public int Compare(Lights.SegmentPoint a, Lights.SegmentPoint b)
{
return -CompareCCW.Compare(a.WorldPos, b.WorldPos, center);
}
}
}