Engine.Core/Primitives/Matrix4x4.cs

@@ -67,6 +67,11 @@ public readonly struct Matrix4x4(
     /// </summary>
     public Matrix4x4 Inverse => Invert(this);
 
+    /// <summary>
+    /// Represents the transposed version of this <see cref="Matrix4x4"/>.
+    /// </summary>
+    public Matrix4x4 Transposed => Transpose(this);
+
     public static Matrix4x4 operator *(Matrix4x4 a, Matrix4x4 b) => new(
         a.M11 * b.M11 + a.M12 * b.M21 + a.M13 * b.M31 + a.M14 * b.M41,
         a.M11 * b.M12 + a.M12 * b.M22 + a.M13 * b.M32 + a.M14 * b.M42,
@@ -202,6 +207,18 @@ public readonly struct Matrix4x4(
         );
     }
 
+    /// <summary>
+    /// Transposes the given <see cref="Matrix4x4"/>.
+    /// </summary>
+    /// <param name="m">The <see cref="Matrix4x4"/>.</param>
+    /// <returns>The transposed <see cref="Matrix4x4"/> of the given <see cref="Matrix4x4"/>.</returns>
+    public static Matrix4x4 Transpose(Matrix4x4 m) => new(
+        m.M11, m.M21, m.M31, m.M41,
+        m.M12, m.M22, m.M32, m.M42,
+        m.M13, m.M23, m.M33, m.M43,
+        m.M14, m.M24, m.M34, m.M44
+    );
+
     public static Matrix4x4 CreateTranslation(Vector3D position) => new(
         1f, 0f, 0f, 0f,
         0f, 1f, 0f, 0f,
@@ -297,6 +314,30 @@ public readonly struct Matrix4x4(
         );
     }
 
+    public static Matrix4x4 CreateOrthographicView(float width, float height, float nearPlane = -1f, float farPlane = 1f)
+    {
+        float invDepth = 1f / (farPlane - nearPlane);
+
+        return new Matrix4x4(
+            2f / width, 0f, 0f, 0f,
+            0f, -2f / height, 0f, 0f,
+            0f, 0f, invDepth, 0f,
+            -1f, 1f, -nearPlane * invDepth, 1f
+        );
+    }
+
+    public static Matrix4x4 CreateOrthographicViewCentered(float width, float height, float nearPlane = -1f, float farPlane = 1f)
+    {
+        float invDepth = 1f / (farPlane - nearPlane);
+
+        return new Matrix4x4(
+            2f / width, 0f, 0f, 0f,
+            0f, 2f / height, 0f, 0f,
+            0f, 0f, invDepth, 0f,
+            0f, 0f, -nearPlane * invDepth, 1f
+        );
+    }
+
     public static Matrix4x4 CreatePerspectiveFieldOfView(float fieldOfViewInRadians, float aspectRatio, float nearPlane, float farPlane)
     {
         float yScale = 1f / Math.Tan(fieldOfViewInRadians / 2f);
@@ -344,6 +385,9 @@ public static class Matrix4x4Extensions
     /// <inheritdoc cref="Matrix4x4.Invert(Matrix4x4)" />
     public static Matrix4x4 Invert(this Matrix4x4 matrix) => Matrix4x4.Invert(matrix);
 
+    /// <inheritdoc cref="Matrix4x4.Transpose(Matrix4x4)" />
+    public static Matrix4x4 Transpose(this Matrix4x4 matrix) => Matrix4x4.Transpose(matrix);
+
     /// <inheritdoc cref="Matrix4x4.CreateTranslation(Vector3D)" />
     public static Matrix4x4 ApplyTranslation(this Matrix4x4 matrix, Vector3D translation) => matrix * Matrix4x4.CreateTranslation(translation);
 
@@ -375,6 +419,14 @@ public static class Matrix4x4Extensions
     public static Matrix4x4 ApplyPerspectiveFieldOfView(this Matrix4x4 matrix, float fieldOfViewInRadians, float aspectRatio, float nearPlane, float farPlane)
         => matrix * Matrix4x4.CreatePerspectiveFieldOfView(fieldOfViewInRadians, aspectRatio, nearPlane, farPlane);
 
+    /// <inheritdoc cref="Matrix4x4.CreateOrthographicView(float, float, float, float)" />
+    public static Matrix4x4 ApplyOrthographicView(this Matrix4x4 matrix, float width, float height, float nearPlane = -1f, float farPlane = 1f)
+        => matrix * Matrix4x4.CreateOrthographicView(width, height, nearPlane, farPlane);
+
+    /// <inheritdoc cref="Matrix4x4.CreateOrthographicViewCentered(float, float, float, float)" />
+    public static Matrix4x4 ApplyOrthographicViewCentered(this Matrix4x4 matrix, float width, float height, float nearPlane = -1f, float farPlane = 1f)
+        => matrix * Matrix4x4.CreateOrthographicViewCentered(width, height, nearPlane, farPlane);
+
     /// <inheritdoc cref="Matrix4x4.ToRightHanded(Matrix4x4) />
     public static Matrix4x4 ToRightHanded(this Matrix4x4 matrix) => Matrix4x4.ToRightHanded(matrix);
 }