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feat: Circle & Shape Projections

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Syntriax
2024-01-26 12:41:51 +03:00
parent dfcc877e58
commit f980546d37
2 changed files with 35 additions and 0 deletions
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27
Engine.Physics2D/Primitives/Shape.cs
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@@ -53,6 +53,30 @@ public record Shape(IList<Vector2D> Vertices) : IEnumerable<Vector2D>
return lines;
}
public static void Project(Shape shape, Vector2D projectionVector, IList<float> list)
{
list.Clear();
int count = shape.Vertices.Count;
for (int i = 0; i < count; i++)
list.Add(projectionVector.Dot(shape[i]));
}
public static Projection Project(Shape shape, Vector2D projectionVector)
{
float min = float.MaxValue;
float max = float.MinValue;
foreach (var vertex in shape)
{
float projectedLength = projectionVector.Dot(vertex);
min = Math.Min(projectedLength, min);
max = Math.Max(projectedLength, max);
}
return new(min, max);
}
public static Shape TransformShape(Shape shape, ITransform transform)
{
List<Vector2D> vertices = new(shape.Vertices.Count);
@@ -96,6 +120,9 @@ public static class ShapeExtensions
public static void ToLines(this Shape shape, IList<Line> lines) => Shape.GetLines(shape, lines);
public static List<Line> ToLines(this Shape shape) => Shape.GetLines(shape);
public static void ToProjection(this Shape shape, Vector2D projectionVector, IList<float> list) => Shape.Project(shape, projectionVector, list);
public static Projection ToProjection(this Shape shape, Vector2D projectionVector) => Shape.Project(shape, projectionVector);
public static Shape TransformShape(this ITransform transform, Shape shape) => Shape.TransformShape(shape, transform);
public static void TransformShape(this ITransform transform, Shape from, ref Shape to) => Shape.TransformShape(from, transform, ref to);