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refactor: Shape

This commit is contained in:
Syntriax 2024-01-23 19:17:08 +03:00
parent 3b299c947c
commit bd03d036aa
1 changed files with 45 additions and 42 deletions
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87
Engine.Physics2D/Primitives/Shape.cs
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@ -7,62 +7,65 @@ namespace Syntriax.Engine.Physics2D.Primitives;
public record Shape(IList<Vector2D> Vertices) public record Shape(IList<Vector2D> Vertices)
{ {
public Triangle SuperTriangle public static Triangle GetSuperTriangle(Shape shape)
{ {
get float minX = float.MaxValue, minY = float.MaxValue;
float maxX = float.MinValue, maxY = float.MinValue;
foreach (Vector2D point in shape.Vertices)
{ {
float minX = float.MaxValue, minY = float.MaxValue; minX = MathF.Min(minX, point.X);
float maxX = float.MinValue, maxY = float.MinValue; minY = MathF.Min(minY, point.Y);
maxX = MathF.Max(maxX, point.X);
foreach (Vector2D point in Vertices) maxY = MathF.Max(maxY, point.Y);
{
minX = MathF.Min(minX, point.X);
minY = MathF.Min(minY, point.Y);
maxX = MathF.Max(maxX, point.X);
maxY = MathF.Max(maxY, point.Y);
}
float dx = maxX - minX;
float dy = maxY - minY;
float deltaMax = MathF.Max(dx, dy);
float midX = (minX + maxX) / 2;
float midY = (minY + maxY) / 2;
Vector2D p1 = new Vector2D((float)midX - 20f * (float)deltaMax, (float)midY - (float)deltaMax);
Vector2D p2 = new Vector2D((float)midX, (float)midY + 20 * (float)deltaMax);
Vector2D p3 = new Vector2D((float)midX + 20 * (float)deltaMax, (float)midY - (float)deltaMax);
return new Triangle(p1, p2, p3);
} }
float dx = maxX - minX;
float dy = maxY - minY;
float deltaMax = MathF.Max(dx, dy);
float midX = (minX + maxX) / 2;
float midY = (minY + maxY) / 2;
Vector2D p1 = new((float)midX - 20f * (float)deltaMax, (float)midY - (float)deltaMax);
Vector2D p2 = new((float)midX, (float)midY + 20 * (float)deltaMax);
Vector2D p3 = new((float)midX + 20 * (float)deltaMax, (float)midY - (float)deltaMax);
return new Triangle(p1, p2, p3);
} }
public List<Line> Lines public static void GetLines(Shape shape, IList<Line> lines)
{
get
{
List<Line> lines = new List<Line>(Vertices.Count - 1);
GetLinesNonAlloc(lines);
return lines;
}
}
public void GetLinesNonAlloc(IList<Line> lines)
{ {
lines.Clear(); lines.Clear();
for (int i = 0; i < Vertices.Count - 1; i++) for (int i = 0; i < shape.Vertices.Count - 1; i++)
lines.Add(new(Vertices[i], Vertices[i + 1])); lines.Add(new(shape.Vertices[i], shape.Vertices[i + 1]));
lines.Add(new(Vertices[^1], Vertices[0])); lines.Add(new(shape.Vertices[^1], shape.Vertices[0]));
} }
public bool ApproximatelyEquals(Shape other) public static List<Line> GetLines(Shape shape)
{ {
if (Vertices.Count != other.Vertices.Count) List<Line> lines = new(shape.Vertices.Count - 1);
GetLines(shape, lines);
return lines;
}
public static bool ApproximatelyEquals(Shape left, Shape right)
{
if (left.Vertices.Count != right.Vertices.Count)
return false; return false;
for (int i = 0; i < Vertices.Count; i++) for (int i = 0; i < left.Vertices.Count; i++)
if (!Vertices[i].ApproximatelyEquals(other.Vertices[i])) if (!left.Vertices[i].ApproximatelyEquals(right.Vertices[i]))
return false; return false;
return true; return true;
} }
} }
public static class ShapeExtensions
{
public static Triangle ToSuperTriangle(this Shape shape) => Shape.GetSuperTriangle(shape);
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 bool ApproximatelyEquals(this Shape left, Shape right) => Shape.ApproximatelyEquals(left, right);
}