muffin v7.5.5

Auspex/Auspex.Rendering.ImGuiFallback/FallbackClipMath.cs

@@ -0,0 +1,64 @@
+using System.Numerics;
+using System.Runtime.CompilerServices;
+using Dalamud.Interface.Utility;
+
+namespace Auspex.Rendering.ImGuiFallback;
+
+internal static class FallbackClipMath
+{
+	public enum LineClipStatus
+	{
+		NotVisible,
+		NotClipped,
+		A_Clipped,
+		B_Clipped
+	}
+
+	public static Vector3 XYZ(this Vector4 v)
+	{
+		return new Vector3(v.X, v.Y, v.Z);
+	}
+
+	public static LineClipStatus ClipLineToPlane(Vector4 plane, ref Vector3 a, ref Vector3 b, out float t)
+	{
+		t = 0f;
+		float num = Vector4.Dot(new Vector4(a, 1f), plane);
+		float num2 = Vector4.Dot(new Vector4(b, 1f), plane);
+		bool flag = num < 0f;
+		bool flag2 = num2 < 0f;
+		if (flag && flag2)
+		{
+			return LineClipStatus.NotClipped;
+		}
+		if (!flag && !flag2)
+		{
+			return LineClipStatus.NotVisible;
+		}
+		Vector3 vector = b - a;
+		t = (0f - num) / Vector3.Dot(vector, plane.XYZ());
+		Vector3 vector2 = a + vector * t;
+		if (flag)
+		{
+			b = vector2;
+			return LineClipStatus.B_Clipped;
+		}
+		a = vector2;
+		return LineClipStatus.A_Clipped;
+	}
+
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static void TransformCoordinate(in Vector3 coordinate, in Matrix4x4 transform, out Vector3 result)
+	{
+		result.X = coordinate.X * transform.M11 + coordinate.Y * transform.M21 + coordinate.Z * transform.M31 + transform.M41;
+		result.Y = coordinate.X * transform.M12 + coordinate.Y * transform.M22 + coordinate.Z * transform.M32 + transform.M42;
+		result.Z = coordinate.X * transform.M13 + coordinate.Y * transform.M23 + coordinate.Z * transform.M33 + transform.M43;
+		float num = 1f / (coordinate.X * transform.M14 + coordinate.Y * transform.M24 + coordinate.Z * transform.M34 + transform.M44);
+		result *= num;
+	}
+
+	public static Vector2 WorldToScreenOld(in Matrix4x4 viewProj, in Vector3 worldPos)
+	{
+		TransformCoordinate(in worldPos, in viewProj, out var result);
+		return new Vector2(0.5f * ImGuiHelpers.MainViewport.Size.X * (1f + result.X), 0.5f * ImGuiHelpers.MainViewport.Size.Y * (1f - result.Y)) + ImGuiHelpers.MainViewport.Pos;
+	}
+}