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Merge pull request #15 from blocktest-game/camera
Adds cameras
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| using System.Collections; | ||
| namespace Blocktest.Rendering; | ||
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| public sealed class Camera { | ||
| private readonly Color _backgroundColor; | ||
| private readonly Vector2 _size; | ||
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| public readonly List<Renderable> RenderedComponents = new(); | ||
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| public Rectangle RenderLocation; | ||
| public readonly RenderTarget2D RenderTarget; | ||
| public Vector2 Position; | ||
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| public Camera(Vector2 position, Vector2 size, GraphicsDevice graphicsDevice, Color? backgroundColor = null) { | ||
| Position = position; | ||
| _size = size; | ||
| _backgroundColor = backgroundColor ?? Color.CornflowerBlue; | ||
| RenderTarget = new RenderTarget2D(graphicsDevice, (int)size.X, (int)size.Y, false, SurfaceFormat.Color, DepthFormat.None, 0, RenderTargetUsage.DiscardContents); | ||
| } | ||
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| public void Draw(GraphicsDevice graphics, SpriteBatch spriteBatch) { | ||
| graphics.SetRenderTarget(RenderTarget); | ||
| graphics.Clear(_backgroundColor); | ||
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| spriteBatch.Begin(); | ||
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| foreach (Renderable component in RenderedComponents) { | ||
| if (component.Appearance == null) { | ||
| continue; | ||
| } | ||
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| Vector2 worldPosition = component.Transform.Position; | ||
| Vector2 cameraPosition = worldPosition - Position; | ||
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| if (worldPosition.X + component.Appearance.Bounds.Width < Position.X && | ||
| worldPosition.X > Position.X + _size.X && | ||
| worldPosition.Y + component.Appearance.Bounds.Height < Position.Y && | ||
| worldPosition.Y > Position.Y + _size.Y) { | ||
| continue; | ||
| } | ||
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| Vector2 flippedPosition = new(cameraPosition.X, RenderTarget.Height - cameraPosition.Y - component.Appearance.Bounds.Height); | ||
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| Rectangle positionBounds = new((int)flippedPosition.X, (int)flippedPosition.Y, (int)(component.Appearance.Bounds.Width * component.Transform.Scale.X), | ||
| (int)(component.Appearance.Bounds.Height * component.Transform.Scale.Y)); | ||
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| spriteBatch.Draw(component.Appearance.Texture, positionBounds, component.Appearance.Bounds, | ||
| component.RenderColor, component.Transform.Rotation, component.Transform.Origin, SpriteEffects.None, (float)component.Layer / EnumCount); | ||
| } | ||
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| spriteBatch.End(); | ||
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| graphics.SetRenderTarget(null); | ||
| } | ||
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| private static readonly int EnumCount = Enum.GetValues(typeof(Layer)).Length; | ||
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| public Vector2 CameraToWorldPos(Vector2 mouseState) { | ||
| return new((mouseState.X - RenderLocation.X) / RenderLocation.Width * RenderTarget.Width + Position.X, Position.Y + RenderTarget.Height - | ||
| (mouseState.Y - RenderLocation.Y) / RenderLocation.Height * RenderTarget.Height); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| namespace Blocktest.Rendering; | ||
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| public enum Layer { | ||
| Top = 0, | ||
| Player = 1, | ||
| Default = 2, | ||
| ForegroundBlocks = 3, | ||
| BackgroundBlocks = 4 | ||
| } | ||
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| public sealed class Renderable { | ||
| public readonly Transform Transform; | ||
| public Drawable? Appearance; | ||
| public Color RenderColor; | ||
| public Layer Layer; | ||
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| public Renderable(Transform transform, Layer layer = Layer.Default, Drawable? appearance = null, Color? renderColor = null) { | ||
| Transform = transform; | ||
| Layer = layer; | ||
| Appearance = appearance; | ||
| RenderColor = renderColor ?? Color.White; | ||
| } | ||
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| public void Draw(SpriteBatch spriteBatch, Vector2 cameraPosition) { | ||
| if (Appearance == null) { | ||
| return; | ||
| } | ||
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| spriteBatch.Draw(Appearance.Texture, Transform.Position - cameraPosition, Appearance.Bounds, RenderColor, Transform.Rotation, Transform.Origin, Transform.Scale, | ||
| SpriteEffects.None, 0); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| namespace Blocktest.Rendering; | ||
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| public sealed class Transform { | ||
| public Vector2 Position; | ||
| public float Rotation; | ||
| public Vector2 Scale; | ||
| public Vector2 Origin; | ||
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| public Transform(Vector2 position, Vector2? scale = null, float rotation = 0, Vector2? origin = null) { | ||
| Position = position; | ||
| Scale = scale ?? Vector2.One; | ||
| Rotation = rotation; | ||
| Origin = origin ?? Vector2.Zero; | ||
| } | ||
| } |
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