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added simple camera

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Ellpeck 2019-08-07 01:21:32 +02:00
parent 51f6f1d620
commit 8e46809d61
4 changed files with 62 additions and 2 deletions
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14
MLEM.Extended/Extensions/CameraExtensions.cs Normal file
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using Microsoft.Xna.Framework;
using MonoGame.Extended;
using Camera = MLEM.Cameras.Camera;
namespace MLEM.Extended.Extensions {
public static class CameraExtensions {
public static RectangleF GetVisibleArea(this Camera camera) {
var start = camera.ToWorldPos(Vector2.Zero);
return new RectangleF(start, camera.ToWorldPos(new Vector2(camera.Viewport.Width, camera.Viewport.Height) - start));
}
}
}

2
MLEM.Extended/MLEM.Extended.csproj
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@ -10,7 +10,7 @@
<PackageProjectUrl>https://github.com/Ellpeck/MLEM</PackageProjectUrl>
<RepositoryUrl>https://github.com/Ellpeck/MLEM</RepositoryUrl>
<PackageLicenseUrl>https://github.com/Ellpeck/MLEM/blob/master/LICENSE</PackageLicenseUrl>
<Version>1.0.2</Version>
<Version>1.0.3</Version>
</PropertyGroup>
<ItemGroup>

46
MLEM/Cameras/Camera.cs Normal file
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using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using MLEM.Extensions;
namespace MLEM.Cameras {
public class Camera {
public Vector2 Position;
public float Scale;
public Matrix ViewMatrix {
get {
var pos = -this.Position * this.Scale;
if (this.roundPosition)
pos = pos.Floor();
return Matrix.CreateScale(this.Scale, this.Scale, 1) * Matrix.CreateTranslation(new Vector3(pos, 0));
}
}
public Vector2 LookingPosition => this.Position + new Vector2(this.Viewport.Width / 2, this.Viewport.Height / 2) / this.Scale;
public Viewport Viewport => this.graphicsDevice.Viewport;
private readonly bool roundPosition;
private readonly GraphicsDevice graphicsDevice;
public Camera(GraphicsDevice graphicsDevice, bool roundPosition = true) {
this.graphicsDevice = graphicsDevice;
this.roundPosition = roundPosition;
}
public void LookAt(Vector2 worldPos) {
this.Position = worldPos - new Vector2(this.Viewport.Width / 2, this.Viewport.Height / 2) / this.Scale;
}
public Vector2 ToWorldPos(Vector2 pos) {
return Vector2.Transform(pos, Matrix.Invert(this.ViewMatrix));
}
public Vector2 ToCameraPos(Vector2 pos) {
return Vector2.Transform(pos, this.ViewMatrix);
}
public (Vector2 topLeft, Vector2 bottomRight) GetVisibleArea() {
return (this.ToWorldPos(Vector2.Zero), this.ToWorldPos(new Vector2(this.Viewport.Width, this.Viewport.Height)));
}
}
}

2
MLEM/MLEM.csproj
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@ -10,7 +10,7 @@
<PackageProjectUrl>https://github.com/Ellpeck/MLEM</PackageProjectUrl>
<RepositoryUrl>https://github.com/Ellpeck/MLEM</RepositoryUrl>
<PackageLicenseUrl>https://github.com/Ellpeck/MLEM/blob/master/LICENSE</PackageLicenseUrl>
<Version>1.0.8</Version>
<Version>1.0.9</Version>
</PropertyGroup>
<ItemGroup>