Merge pull request #69143 from raulsntos/dotnet/projection-docs
C#: Add Projection documentation
This commit is contained in:
Ignacio Roldán Etcheverry
GitHub
commit
cdfef0c852
@ -3,6 +3,14 @@ using System.Runtime.InteropServices;
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namespace Godot
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{
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/// <summary>
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/// A 4x4 matrix used for 3D projective transformations. It can represent transformations such as
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/// translation, rotation, scaling, shearing, and perspective division. It consists of four
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/// <see cref="Vector4"/> columns.
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/// For purely linear transformations (translation, rotation, and scale), it is recommended to use
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/// <see cref="Transform3D"/>, as it is more performant and has a lower memory footprint.
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/// Used internally as <see cref="Camera3D"/>'s projection matrix.
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/// </summary>
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[Serializable]
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[StructLayout(LayoutKind.Sequential)]
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public struct Projection : IEquatable<Projection>
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@ -59,48 +67,107 @@ namespace Godot
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public Vector4 w;
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/// <summary>
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/// Constructs a projection from 4 vectors (matrix columns).
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/// Access whole columns in the form of <see cref="Vector4"/>.
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/// </summary>
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/// <param name="x">The X column, or column index 0.</param>
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/// <param name="y">The Y column, or column index 1.</param>
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/// <param name="z">The Z column, or column index 2.</param>
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/// <param name="w">The W column, or column index 3.</param>
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public Projection(Vector4 x, Vector4 y, Vector4 z, Vector4 w)
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/// <param name="column">Which column vector.</param>
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/// <exception cref="ArgumentOutOfRangeException">
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/// <paramref name="column"/> is not 0, 1, 2 or 3.
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/// </exception>
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public Vector4 this[int column]
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{
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this.x = x;
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this.y = y;
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this.z = z;
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this.w = w;
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readonly get
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{
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switch (column)
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{
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case 0:
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return x;
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case 1:
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return y;
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case 2:
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return z;
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case 3:
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return w;
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default:
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throw new ArgumentOutOfRangeException(nameof(column));
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}
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}
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set
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{
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switch (column)
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{
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case 0:
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x = value;
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return;
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case 1:
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y = value;
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return;
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case 2:
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z = value;
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return;
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case 3:
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w = value;
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return;
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default:
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throw new ArgumentOutOfRangeException(nameof(column));
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}
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}
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}
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/// <summary>
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/// Constructs a new <see cref="Projection"/> from a <see cref="Transform3D"/>.
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/// Access single values.
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/// </summary>
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/// <param name="transform">The <see cref="Transform3D"/>.</param>
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public Projection(Transform3D transform)
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/// <param name="column">Which column vector.</param>
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/// <param name="row">Which row of the column.</param>
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/// <exception cref="ArgumentOutOfRangeException">
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/// <paramref name="column"/> or <paramref name="row"/> are not 0, 1, 2 or 3.
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/// </exception>
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public real_t this[int column, int row]
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{
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x = new Vector4(transform.basis.Row0.x, transform.basis.Row1.x, transform.basis.Row2.x, 0);
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y = new Vector4(transform.basis.Row0.y, transform.basis.Row1.y, transform.basis.Row2.y, 0);
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z = new Vector4(transform.basis.Row0.z, transform.basis.Row1.z, transform.basis.Row2.z, 0);
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w = new Vector4(transform.origin.x, transform.origin.y, transform.origin.z, 1);
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readonly get
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{
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switch (column)
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{
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case 0:
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return x[row];
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case 1:
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return y[row];
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case 2:
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return z[row];
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case 3:
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return w[row];
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default:
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throw new ArgumentOutOfRangeException(nameof(column));
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}
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}
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set
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{
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switch (column)
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{
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case 0:
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x[row] = value;
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return;
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case 1:
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y[row] = value;
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return;
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case 2:
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z[row] = value;
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return;
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case 3:
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w[row] = value;
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return;
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default:
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throw new ArgumentOutOfRangeException(nameof(column));
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}
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}
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}
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/// <summary>
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/// Constructs a new <see cref="Transform3D"/> from the <see cref="Projection"/>.
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/// Creates a new <see cref="Projection"/> that projects positions from a depth range of
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/// <c>-1</c> to <c>1</c> to one that ranges from <c>0</c> to <c>1</c>, and flips the projected
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/// positions vertically, according to <paramref name="flipY"/>.
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/// </summary>
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/// <param name="proj">The <see cref="Projection"/>.</param>
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public static explicit operator Transform3D(Projection proj)
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{
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return new Transform3D(
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new Basis(
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new Vector3(proj.x.x, proj.x.y, proj.x.z),
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new Vector3(proj.y.x, proj.y.y, proj.y.z),
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new Vector3(proj.z.x, proj.z.y, proj.z.z)
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),
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new Vector3(proj.w.x, proj.w.y, proj.w.z)
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);
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}
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/// <param name="flipY">If the projection should be flipped vertically.</param>
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/// <returns>The created projection.</returns>
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public static Projection CreateDepthCorrection(bool flipY)
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{
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return new Projection(
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@ -111,6 +178,12 @@ namespace Godot
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);
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}
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/// <summary>
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/// Creates a new <see cref="Projection"/> that scales a given projection to fit around
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/// a given <see cref="AABB"/> in projection space.
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/// </summary>
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/// <param name="aabb">The AABB to fit the projection around.</param>
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/// <returns>The created projection.</returns>
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public static Projection CreateFitAabb(AABB aabb)
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{
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Vector3 min = aabb.Position;
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@ -124,6 +197,25 @@ namespace Godot
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);
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}
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/// <summary>
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/// Creates a new <see cref="Projection"/> for projecting positions onto a head-mounted display with
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/// the given X:Y aspect ratio, distance between eyes, display width, distance to lens, oversampling factor,
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/// and depth clipping planes.
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/// <paramref name="eye"/> creates the projection for the left eye when set to 1,
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/// or the right eye when set to 2.
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/// </summary>
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/// <param name="eye">
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/// The eye to create the projection for.
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/// The left eye when set to 1, the right eye when set to 2.
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/// </param>
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/// <param name="aspect">The aspect ratio.</param>
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/// <param name="intraocularDist">The distance between the eyes.</param>
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/// <param name="displayWidth">The display width.</param>
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/// <param name="displayToLens">The distance to the lens.</param>
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/// <param name="oversample">The oversampling factor.</param>
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/// <param name="zNear">The near clipping distance.</param>
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/// <param name="zFar">The far clipping distance.</param>
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/// <returns>The created projection.</returns>
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public static Projection CreateForHmd(int eye, real_t aspect, real_t intraocularDist, real_t displayWidth, real_t displayToLens, real_t oversample, real_t zNear, real_t zFar)
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{
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real_t f1 = (intraocularDist * (real_t)0.5) / displayToLens;
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@ -148,6 +240,17 @@ namespace Godot
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}
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}
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/// <summary>
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/// Creates a new <see cref="Projection"/> that projects positions in a frustum with
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/// the given clipping planes.
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/// </summary>
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/// <param name="left">The left clipping distance.</param>
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/// <param name="right">The right clipping distance.</param>
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/// <param name="bottom">The bottom clipping distance.</param>
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/// <param name="top">The top clipping distance.</param>
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/// <param name="near">The near clipping distance.</param>
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/// <param name="far">The far clipping distance.</param>
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/// <returns>The created projection.</returns>
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public static Projection CreateFrustum(real_t left, real_t right, real_t bottom, real_t top, real_t near, real_t far)
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{
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if (right <= left)
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@ -179,6 +282,18 @@ namespace Godot
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);
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}
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/// <summary>
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/// Creates a new <see cref="Projection"/> that projects positions in a frustum with
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/// the given size, X:Y aspect ratio, offset, and clipping planes.
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/// <paramref name="flipFov"/> determines whether the projection's field of view is flipped over its diagonal.
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/// </summary>
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/// <param name="size">The frustum size.</param>
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/// <param name="aspect">The aspect ratio.</param>
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/// <param name="offset">The offset to apply.</param>
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/// <param name="near">The near clipping distance.</param>
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/// <param name="far">The far clipping distance.</param>
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/// <param name="flipFov">If the field of view is flipped over the projection's diagonal.</param>
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/// <returns>The created projection.</returns>
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public static Projection CreateFrustumAspect(real_t size, real_t aspect, Vector2 offset, real_t near, real_t far, bool flipFov)
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{
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if (!flipFov)
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@ -188,6 +303,11 @@ namespace Godot
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return CreateFrustum(-size / 2 + offset.x, +size / 2 + offset.x, -size / aspect / 2 + offset.y, +size / aspect / 2 + offset.y, near, far);
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}
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/// <summary>
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/// Creates a new <see cref="Projection"/> that projects positions into the given <see cref="Rect2"/>.
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/// </summary>
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/// <param name="rect">The Rect2 to project positions into.</param>
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/// <returns>The created projection.</returns>
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public static Projection CreateLightAtlasRect(Rect2 rect)
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{
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return new Projection(
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@ -198,6 +318,17 @@ namespace Godot
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);
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}
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/// <summary>
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/// Creates a new <see cref="Projection"/> that projects positions using an orthogonal projection with
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/// the given clipping planes.
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/// </summary>
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/// <param name="left">The left clipping distance.</param>
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/// <param name="right">The right clipping distance.</param>
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/// <param name="bottom">The bottom clipping distance.</param>
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/// <param name="top">The top clipping distance.</param>
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/// <param name="zNear">The near clipping distance.</param>
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/// <param name="zFar">The far clipping distance.</param>
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/// <returns>The created projection.</returns>
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public static Projection CreateOrthogonal(real_t left, real_t right, real_t bottom, real_t top, real_t zNear, real_t zFar)
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{
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Projection proj = Projection.Identity;
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@ -211,6 +342,17 @@ namespace Godot
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return proj;
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}
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/// <summary>
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/// Creates a new <see cref="Projection"/> that projects positions using an orthogonal projection with
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/// the given size, X:Y aspect ratio, and clipping planes.
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/// <paramref name="flipFov"/> determines whether the projection's field of view is flipped over its diagonal.
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/// </summary>
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/// <param name="size">The frustum size.</param>
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/// <param name="aspect">The aspect ratio.</param>
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/// <param name="zNear">The near clipping distance.</param>
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/// <param name="zFar">The far clipping distance.</param>
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/// <param name="flipFov">If the field of view is flipped over the projection's diagonal.</param>
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/// <returns>The created projection.</returns>
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public static Projection CreateOrthogonalAspect(real_t size, real_t aspect, real_t zNear, real_t zFar, bool flipFov)
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{
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if (!flipFov)
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@ -220,6 +362,17 @@ namespace Godot
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return CreateOrthogonal(-size / 2, +size / 2, -size / aspect / 2, +size / aspect / 2, zNear, zFar);
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}
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/// <summary>
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/// Creates a new <see cref="Projection"/> that projects positions using a perspective projection with
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/// the given Y-axis field of view (in degrees), X:Y aspect ratio, and clipping planes.
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/// <paramref name="flipFov"/> determines whether the projection's field of view is flipped over its diagonal.
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/// </summary>
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/// <param name="fovyDegrees">The vertical field of view (in degrees).</param>
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/// <param name="aspect">The aspect ratio.</param>
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/// <param name="zNear">The near clipping distance.</param>
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/// <param name="zFar">The far clipping distance.</param>
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/// <param name="flipFov">If the field of view is flipped over the projection's diagonal.</param>
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/// <returns>The created projection.</returns>
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public static Projection CreatePerspective(real_t fovyDegrees, real_t aspect, real_t zNear, real_t zFar, bool flipFov)
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{
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if (flipFov)
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@ -249,6 +402,27 @@ namespace Godot
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return proj;
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}
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/// <summary>
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/// Creates a new <see cref="Projection"/> that projects positions using a perspective projection with
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/// the given Y-axis field of view (in degrees), X:Y aspect ratio, and clipping distances.
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/// The projection is adjusted for a head-mounted display with the given distance between eyes and distance
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/// to a point that can be focused on.
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/// <paramref name="eye"/> creates the projection for the left eye when set to 1,
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/// or the right eye when set to 2.
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/// <paramref name="flipFov"/> determines whether the projection's field of view is flipped over its diagonal.
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/// </summary>
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/// <param name="fovyDegrees">The vertical field of view (in degrees).</param>
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/// <param name="aspect">The aspect ratio.</param>
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/// <param name="zNear">The near clipping distance.</param>
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/// <param name="zFar">The far clipping distance.</param>
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/// <param name="flipFov">If the field of view is flipped over the projection's diagonal.</param>
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/// <param name="eye">
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/// The eye to create the projection for.
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/// The left eye when set to 1, the right eye when set to 2.
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/// </param>
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/// <param name="intraocularDist">The distance between the eyes.</param>
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/// <param name="convergenceDist">The distance to a point of convergence that can be focused on.</param>
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/// <returns>The created projection.</returns>
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public static Projection CreatePerspectiveHmd(real_t fovyDegrees, real_t aspect, real_t zNear, real_t zFar, bool flipFov, int eye, real_t intraocularDist, real_t convergenceDist)
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{
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if (flipFov)
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@ -286,6 +460,13 @@ namespace Godot
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return proj * cm;
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}
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/// <summary>
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/// Returns a scalar value that is the signed factor by which areas are scaled by this matrix.
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/// If the sign is negative, the matrix flips the orientation of the area.
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/// The determinant can be used to calculate the invertibility of a matrix or solve linear systems
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/// of equations involving the matrix, among other applications.
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/// </summary>
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/// <returns>The determinant calculated from this projection.</returns>
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public readonly real_t Determinant()
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{
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return x.w * y.z * z.y * w.x - x.z * y.w * z.y * w.x -
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@ -302,12 +483,20 @@ namespace Godot
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x.y * y.x * z.z * w.w + x.x * y.y * z.z * w.w;
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}
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/// <summary>
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/// Returns the X:Y aspect ratio of this <see cref="Projection"/>'s viewport.
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/// </summary>
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/// <returns>The aspect ratio from this projection's viewport.</returns>
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public readonly real_t GetAspect()
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{
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Vector2 vpHe = GetViewportHalfExtents();
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return vpHe.x / vpHe.y;
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}
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/// <summary>
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/// Returns the horizontal field of view of the projection (in degrees).
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/// </summary>
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/// <returns>The horizontal field of view of this projection.</returns>
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public readonly real_t GetFov()
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{
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Plane rightPlane = new Plane(x.w - x.x, y.w - y.x, z.w - z.x, -w.w + w.x).Normalized();
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@ -322,11 +511,22 @@ namespace Godot
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}
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}
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/// <summary>
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/// Returns the vertical field of view of the projection (in degrees) associated with
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/// the given horizontal field of view (in degrees) and aspect ratio.
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/// </summary>
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/// <param name="fovx">The horizontal field of view (in degrees).</param>
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/// <param name="aspect">The aspect ratio.</param>
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/// <returns>The vertical field of view of this projection.</returns>
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public static real_t GetFovy(real_t fovx, real_t aspect)
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{
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return Mathf.RadToDeg(Mathf.Atan(aspect * Mathf.Tan(Mathf.DegToRad(fovx) * (real_t)0.5)) * (real_t)2.0);
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}
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/// <summary>
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/// Returns the factor by which the visible level of detail is scaled by this <see cref="Projection"/>.
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/// </summary>
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/// <returns>The level of detail factor for this projection.</returns>
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public readonly real_t GetLodMultiplier()
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{
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if (IsOrthogonal())
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@ -341,6 +541,12 @@ namespace Godot
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}
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}
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/// <summary>
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/// Returns the number of pixels with the given pixel width displayed per meter, after
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/// this <see cref="Projection"/> is applied.
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/// </summary>
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/// <param name="forPixelWidth">The width for each pixel (in meters).</param>
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/// <returns>The number of pixels per meter.</returns>
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public readonly int GetPixelsPerMeter(int forPixelWidth)
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{
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Vector3 result = this * new Vector3(1, 0, -1);
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@ -348,6 +554,15 @@ namespace Godot
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return (int)((result.x * (real_t)0.5 + (real_t)0.5) * forPixelWidth);
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}
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/// <summary>
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/// Returns the clipping plane of this <see cref="Projection"/> whose index is given
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/// by <paramref name="plane"/>.
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/// <paramref name="plane"/> should be equal to one of <see cref="Planes.Near"/>,
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/// <see cref="Planes.Far"/>, <see cref="Planes.Left"/>, <see cref="Planes.Top"/>,
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/// <see cref="Planes.Right"/>, or <see cref="Planes.Bottom"/>.
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/// </summary>
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/// <param name="plane">The kind of clipping plane to get from the projection.</param>
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/// <returns>The clipping plane of this projection.</returns>
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public readonly Plane GetProjectionPlane(Planes plane)
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{
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Plane newPlane = plane switch
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@ -364,28 +579,49 @@ namespace Godot
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return newPlane.Normalized();
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}
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/// <summary>
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/// Returns the dimensions of the far clipping plane of the projection, divided by two.
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/// </summary>
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/// <returns>The half extents for this projection's far plane.</returns>
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public readonly Vector2 GetFarPlaneHalfExtents()
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{
|
||||
var res = GetProjectionPlane(Planes.Far).Intersect3(GetProjectionPlane(Planes.Right), GetProjectionPlane(Planes.Top));
|
||||
return new Vector2(res.Value.x, res.Value.y);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Returns the dimensions of the viewport plane that this <see cref="Projection"/>
|
||||
/// projects positions onto, divided by two.
|
||||
/// </summary>
|
||||
/// <returns>The half extents for this projection's viewport plane.</returns>
|
||||
public readonly Vector2 GetViewportHalfExtents()
|
||||
{
|
||||
var res = GetProjectionPlane(Planes.Near).Intersect3(GetProjectionPlane(Planes.Right), GetProjectionPlane(Planes.Top));
|
||||
return new Vector2(res.Value.x, res.Value.y);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Returns the distance for this <see cref="Projection"/> beyond which positions are clipped.
|
||||
/// </summary>
|
||||
/// <returns>The distance beyond which positions are clipped.</returns>
|
||||
public readonly real_t GetZFar()
|
||||
{
|
||||
return GetProjectionPlane(Planes.Far).D;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Returns the distance for this <see cref="Projection"/> before which positions are clipped.
|
||||
/// </summary>
|
||||
/// <returns>The distance before which positions are clipped.</returns>
|
||||
public readonly real_t GetZNear()
|
||||
{
|
||||
return -GetProjectionPlane(Planes.Near).D;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Returns a copy of this <see cref="Projection"/> with the signs of the values of the Y column flipped.
|
||||
/// </summary>
|
||||
/// <returns>The flipped projection.</returns>
|
||||
public readonly Projection FlippedY()
|
||||
{
|
||||
Projection proj = this;
|
||||
@ -393,6 +629,13 @@ namespace Godot
|
||||
return proj;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Returns a <see cref="Projection"/> with the near clipping distance adjusted to be
|
||||
/// <paramref name="newZNear"/>.
|
||||
/// Note: The original <see cref="Projection"/> must be a perspective projection.
|
||||
/// </summary>
|
||||
/// <param name="newZNear">The near clipping distance to adjust the projection to.</param>
|
||||
/// <returns>The adjusted projection.</returns>
|
||||
public readonly Projection PerspectiveZNearAdjusted(real_t newZNear)
|
||||
{
|
||||
Projection proj = this;
|
||||
@ -404,6 +647,12 @@ namespace Godot
|
||||
return proj;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Returns a <see cref="Projection"/> with the X and Y values from the given <see cref="Vector2"/>
|
||||
/// added to the first and second values of the final column respectively.
|
||||
/// </summary>
|
||||
/// <param name="offset">The offset to apply to the projection.</param>
|
||||
/// <returns>The offseted projection.</returns>
|
||||
public readonly Projection JitterOffseted(Vector2 offset)
|
||||
{
|
||||
Projection proj = this;
|
||||
@ -412,6 +661,11 @@ namespace Godot
|
||||
return proj;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Returns a <see cref="Projection"/> that performs the inverse of this <see cref="Projection"/>'s
|
||||
/// projective transformation.
|
||||
/// </summary>
|
||||
/// <returns>The inverted projection.</returns>
|
||||
public readonly Projection Inverse()
|
||||
{
|
||||
Projection proj = this;
|
||||
@ -535,11 +789,70 @@ namespace Godot
|
||||
return proj;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Returns <see langword="true"/> if this <see cref="Projection"/> performs an orthogonal projection.
|
||||
/// </summary>
|
||||
/// <returns>If the projection performs an orthogonal projection.</returns>
|
||||
public readonly bool IsOrthogonal()
|
||||
{
|
||||
return w.w == (real_t)1.0;
|
||||
}
|
||||
|
||||
// Constants
|
||||
private static readonly Projection _zero = new Projection(
|
||||
new Vector4(0, 0, 0, 0),
|
||||
new Vector4(0, 0, 0, 0),
|
||||
new Vector4(0, 0, 0, 0),
|
||||
new Vector4(0, 0, 0, 0)
|
||||
);
|
||||
private static readonly Projection _identity = new Projection(
|
||||
new Vector4(1, 0, 0, 0),
|
||||
new Vector4(0, 1, 0, 0),
|
||||
new Vector4(0, 0, 1, 0),
|
||||
new Vector4(0, 0, 0, 1)
|
||||
);
|
||||
|
||||
/// <summary>
|
||||
/// Zero projection, a projection with all components set to <c>0</c>.
|
||||
/// </summary>
|
||||
/// <value>Equivalent to <c>new Projection(Vector4.Zero, Vector4.Zero, Vector4.Zero, Vector4.Zero)</c>.</value>
|
||||
public static Projection Zero { get { return _zero; } }
|
||||
|
||||
/// <summary>
|
||||
/// The identity projection, with no distortion applied.
|
||||
/// This is used as a replacement for <c>Projection()</c> in GDScript.
|
||||
/// Do not use <c>new Projection()</c> with no arguments in C#, because it sets all values to zero.
|
||||
/// </summary>
|
||||
/// <value>Equivalent to <c>new Projection(new Vector4(1, 0, 0, 0), new Vector4(0, 1, 0, 0), new Vector4(0, 0, 1, 0), new Vector4(0, 0, 0, 1))</c>.</value>
|
||||
public static Projection Identity { get { return _identity; } }
|
||||
|
||||
/// <summary>
|
||||
/// Constructs a projection from 4 vectors (matrix columns).
|
||||
/// </summary>
|
||||
/// <param name="x">The X column, or column index 0.</param>
|
||||
/// <param name="y">The Y column, or column index 1.</param>
|
||||
/// <param name="z">The Z column, or column index 2.</param>
|
||||
/// <param name="w">The W column, or column index 3.</param>
|
||||
public Projection(Vector4 x, Vector4 y, Vector4 z, Vector4 w)
|
||||
{
|
||||
this.x = x;
|
||||
this.y = y;
|
||||
this.z = z;
|
||||
this.w = w;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Constructs a new <see cref="Projection"/> from a <see cref="Transform3D"/>.
|
||||
/// </summary>
|
||||
/// <param name="transform">The <see cref="Transform3D"/>.</param>
|
||||
public Projection(Transform3D transform)
|
||||
{
|
||||
x = new Vector4(transform.basis.Row0.x, transform.basis.Row1.x, transform.basis.Row2.x, 0);
|
||||
y = new Vector4(transform.basis.Row0.y, transform.basis.Row1.y, transform.basis.Row2.y, 0);
|
||||
z = new Vector4(transform.basis.Row0.z, transform.basis.Row1.z, transform.basis.Row2.z, 0);
|
||||
w = new Vector4(transform.origin.x, transform.origin.y, transform.origin.z, 1);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Composes these two projections by multiplying them
|
||||
/// together. This has the effect of applying the right
|
||||
@ -646,127 +959,41 @@ namespace Godot
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Access whole columns in the form of <see cref="Vector4"/>.
|
||||
/// Constructs a new <see cref="Transform3D"/> from the <see cref="Projection"/>.
|
||||
/// </summary>
|
||||
/// <param name="column">Which column vector.</param>
|
||||
/// <exception cref="ArgumentOutOfRangeException">
|
||||
/// <paramref name="column"/> is not 0, 1, 2 or 3.
|
||||
/// </exception>
|
||||
public Vector4 this[int column]
|
||||
/// <param name="proj">The <see cref="Projection"/>.</param>
|
||||
public static explicit operator Transform3D(Projection proj)
|
||||
{
|
||||
readonly get
|
||||
{
|
||||
switch (column)
|
||||
{
|
||||
case 0:
|
||||
return x;
|
||||
case 1:
|
||||
return y;
|
||||
case 2:
|
||||
return z;
|
||||
case 3:
|
||||
return w;
|
||||
default:
|
||||
throw new ArgumentOutOfRangeException(nameof(column));
|
||||
}
|
||||
}
|
||||
set
|
||||
{
|
||||
switch (column)
|
||||
{
|
||||
case 0:
|
||||
x = value;
|
||||
return;
|
||||
case 1:
|
||||
y = value;
|
||||
return;
|
||||
case 2:
|
||||
z = value;
|
||||
return;
|
||||
case 3:
|
||||
w = value;
|
||||
return;
|
||||
default:
|
||||
throw new ArgumentOutOfRangeException(nameof(column));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Access single values.
|
||||
/// </summary>
|
||||
/// <param name="column">Which column vector.</param>
|
||||
/// <param name="row">Which row of the column.</param>
|
||||
/// <exception cref="ArgumentOutOfRangeException">
|
||||
/// <paramref name="column"/> or <paramref name="row"/> are not 0, 1, 2 or 3.
|
||||
/// </exception>
|
||||
public real_t this[int column, int row]
|
||||
{
|
||||
readonly get
|
||||
{
|
||||
switch (column)
|
||||
{
|
||||
case 0:
|
||||
return x[row];
|
||||
case 1:
|
||||
return y[row];
|
||||
case 2:
|
||||
return z[row];
|
||||
case 3:
|
||||
return w[row];
|
||||
default:
|
||||
throw new ArgumentOutOfRangeException(nameof(column));
|
||||
}
|
||||
}
|
||||
set
|
||||
{
|
||||
switch (column)
|
||||
{
|
||||
case 0:
|
||||
x[row] = value;
|
||||
return;
|
||||
case 1:
|
||||
y[row] = value;
|
||||
return;
|
||||
case 2:
|
||||
z[row] = value;
|
||||
return;
|
||||
case 3:
|
||||
w[row] = value;
|
||||
return;
|
||||
default:
|
||||
throw new ArgumentOutOfRangeException(nameof(column));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Constants
|
||||
private static readonly Projection _zero = new Projection(
|
||||
new Vector4(0, 0, 0, 0),
|
||||
new Vector4(0, 0, 0, 0),
|
||||
new Vector4(0, 0, 0, 0),
|
||||
new Vector4(0, 0, 0, 0)
|
||||
);
|
||||
private static readonly Projection _identity = new Projection(
|
||||
new Vector4(1, 0, 0, 0),
|
||||
new Vector4(0, 1, 0, 0),
|
||||
new Vector4(0, 0, 1, 0),
|
||||
new Vector4(0, 0, 0, 1)
|
||||
return new Transform3D(
|
||||
new Basis(
|
||||
new Vector3(proj.x.x, proj.x.y, proj.x.z),
|
||||
new Vector3(proj.y.x, proj.y.y, proj.y.z),
|
||||
new Vector3(proj.z.x, proj.z.y, proj.z.z)
|
||||
),
|
||||
new Vector3(proj.w.x, proj.w.y, proj.w.z)
|
||||
);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Zero projection, a projection with all components set to <c>0</c>.
|
||||
/// Returns <see langword="true"/> if the projection is exactly equal
|
||||
/// to the given object (<see paramref="obj"/>).
|
||||
/// </summary>
|
||||
/// <value>Equivalent to <c>new Projection(Vector4.Zero, Vector4.Zero, Vector4.Zero, Vector4.Zero)</c>.</value>
|
||||
public static Projection Zero { get { return _zero; } }
|
||||
/// <param name="obj">The object to compare with.</param>
|
||||
/// <returns>Whether or not the vector and the object are equal.</returns>
|
||||
public override readonly bool Equals(object obj)
|
||||
{
|
||||
return obj is Projection other && Equals(other);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// The identity projection, with no distortion applied.
|
||||
/// This is used as a replacement for <c>Projection()</c> in GDScript.
|
||||
/// Do not use <c>new Projection()</c> with no arguments in C#, because it sets all values to zero.
|
||||
/// Returns <see langword="true"/> if the projections are exactly equal.
|
||||
/// </summary>
|
||||
/// <value>Equivalent to <c>new Projection(new Vector4(1, 0, 0, 0), new Vector4(0, 1, 0, 0), new Vector4(0, 0, 1, 0), new Vector4(0, 0, 0, 1))</c>.</value>
|
||||
public static Projection Identity { get { return _identity; } }
|
||||
/// <param name="other">The other projection.</param>
|
||||
/// <returns>Whether or not the projections are exactly equal.</returns>
|
||||
public readonly bool Equals(Projection other)
|
||||
{
|
||||
return x == other.x && y == other.y && z == other.z && w == other.w;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Serves as the hash function for <see cref="Projection"/>.
|
||||
@ -797,26 +1024,5 @@ namespace Godot
|
||||
$"{z.x.ToString(format)}, {z.y.ToString(format)}, {z.z.ToString(format)}, {z.w.ToString(format)}\n" +
|
||||
$"{w.x.ToString(format)}, {w.y.ToString(format)}, {w.z.ToString(format)}, {w.w.ToString(format)}\n";
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Returns <see langword="true"/> if the projection is exactly equal
|
||||
/// to the given object (<see paramref="obj"/>).
|
||||
/// </summary>
|
||||
/// <param name="obj">The object to compare with.</param>
|
||||
/// <returns>Whether or not the vector and the object are equal.</returns>
|
||||
public override readonly bool Equals(object obj)
|
||||
{
|
||||
return obj is Projection other && Equals(other);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Returns <see langword="true"/> if the projections are exactly equal.
|
||||
/// </summary>
|
||||
/// <param name="other">The other projection.</param>
|
||||
/// <returns>Whether or not the projections are exactly equal.</returns>
|
||||
public readonly bool Equals(Projection other)
|
||||
{
|
||||
return x == other.x && y == other.y && z == other.z && w == other.w;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user