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Implement Masking property for TrianglesBackground

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This commit is contained in:
Andrei Zavatski
2023-01-25 12:20:51 +03:00
parent 67e9de43be
commit d09d6f31d7
3 changed files with 42 additions and 9 deletions
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43
osu.Game/Graphics/Backgrounds/Triangles.cs
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@ -77,6 +77,12 @@ namespace osu.Game.Graphics.Backgrounds
set => triangleScale.Value = value;
}
/// <summary>
/// If enabled, only the portion of triangles that falls within this <see cref="Drawable"/>'s
/// shape is drawn to the screen.
/// </summary>
public bool Masking { get; set; } = true;
/// <summary>
/// Whether we should drop-off alpha values of triangles more quickly to improve
/// the visual appearance of fading. This defaults to on as it is generally more
@ -252,6 +258,7 @@ namespace osu.Game.Graphics.Backgrounds
private IShader shader;
private Texture texture;
private bool masking;
private readonly List<TriangleParticle> parts = new List<TriangleParticle>();
private readonly Vector2 triangleSize = new Vector2(1f, equilateral_triangle_ratio) * triangle_size;
@ -271,6 +278,7 @@ namespace osu.Game.Graphics.Backgrounds
shader = Source.shader;
texture = Source.texture;
size = Source.DrawSize;
masking = Source.Masking;
parts.Clear();
parts.AddRange(Source.parts);
@ -294,26 +302,45 @@ namespace osu.Game.Graphics.Backgrounds
Vector2 relativeSize = Vector2.Divide(triangleSize * particle.Scale, size);
Vector2 topLeft = particle.Position - new Vector2(relativeSize.X * 0.5f, 0f);
Vector2 topRight = topLeft + new Vector2(relativeSize.X, 0f);
Vector2 bottomLeft = topLeft + new Vector2(0f, relativeSize.Y);
Vector2 bottomRight = bottomLeft + new Vector2(relativeSize.X, 0f);
Quad triangleQuad = masking ? clampToDrawable(topLeft, relativeSize) : new Quad(topLeft.X, topLeft.Y, relativeSize.X, relativeSize.Y);
var drawQuad = new Quad(
Vector2Extensions.Transform(topLeft * size, DrawInfo.Matrix),
Vector2Extensions.Transform(topRight * size, DrawInfo.Matrix),
Vector2Extensions.Transform(bottomLeft * size, DrawInfo.Matrix),
Vector2Extensions.Transform(bottomRight * size, DrawInfo.Matrix)
Vector2Extensions.Transform(triangleQuad.TopLeft * size, DrawInfo.Matrix),
Vector2Extensions.Transform(triangleQuad.TopRight * size, DrawInfo.Matrix),
Vector2Extensions.Transform(triangleQuad.BottomLeft * size, DrawInfo.Matrix),
Vector2Extensions.Transform(triangleQuad.BottomRight * size, DrawInfo.Matrix)
);
ColourInfo colourInfo = DrawColourInfo.Colour;
colourInfo.ApplyChild(particle.Colour);
renderer.DrawQuad(texture, drawQuad, colourInfo, vertexAction: vertexBatch.AddAction);
RectangleF textureCoords = new RectangleF(
triangleQuad.TopLeft.X - topLeft.X,
triangleQuad.TopLeft.Y - topLeft.Y,
triangleQuad.Width,
triangleQuad.Height
) / relativeSize;
renderer.DrawQuad(texture, drawQuad, colourInfo, new RectangleF(0, 0, 1, 1), vertexBatch.AddAction, textureCoords: textureCoords);
}
shader.Unbind();
}
private static Quad clampToDrawable(Vector2 topLeft, Vector2 size)
{
float leftClamped = Math.Clamp(topLeft.X, 0f, 1f);
float topClamped = Math.Clamp(topLeft.Y, 0f, 1f);
return new Quad(
leftClamped,
topClamped,
Math.Clamp(topLeft.X + size.X, 0f, 1f) - leftClamped,
Math.Clamp(topLeft.Y + size.Y, 0f, 1f) - topClamped
);
}
protected override void Dispose(bool isDisposing)
{
base.Dispose(isDisposing);