celesteia archive, last updated april 9th 2024

Signed-off-by: hazel <hazel@hazelthats.me>

1 files changed, 43 insertions, 0 deletions

diff --git a/source/game/systems/CameraRenderSystem.cs b/source/game/systems/CameraRenderSystem.cs
new file mode 100644
index 0000000..2846fa7
--- /dev/null
+++ b/source/game/systems/CameraRenderSystem.cs
@@ -0,0 +1,43 @@
+using Celesteia.Graphics;
+using Celesteia.Resources.Sprites;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using MonoGame.Extended;
+using MonoGame.Extended.Entities;
+using MonoGame.Extended.Entities.Systems;
+
+namespace Celesteia.Game.Systems {
+    public class CameraRenderSystem : EntityDrawSystem
+    {
+        private readonly Camera2D _camera;
+        private readonly SpriteBatch _spriteBatch;
+
+        private ComponentMapper<Transform2> transformMapper;
+        private ComponentMapper<EntityFrames> entityFramesMapper;
+
+        public CameraRenderSystem(Camera2D camera, SpriteBatch spriteBatch) : base(Aspect.All(typeof(Transform2), typeof(EntityFrames))) {
+            _camera = camera;
+            _spriteBatch = spriteBatch;
+        }
+
+        public override void Initialize(IComponentMapperService mapperService)
+        {
+            transformMapper = mapperService.GetMapper<Transform2>();
+            entityFramesMapper = mapperService.GetMapper<EntityFrames>();
+        }
+
+        public override void Draw(GameTime gameTime)
+        {
+            _spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.NonPremultiplied, SamplerState.PointClamp, null, null, null, _camera.GetViewMatrix());
+            
+            foreach (int entityId in ActiveEntities) {
+                Transform2 transform = transformMapper.Get(entityId);
+                EntityFrames entityFrames = entityFramesMapper.Get(entityId);
+
+                entityFrames.Draw(0, _spriteBatch, transform.Position, transform.Scale, Color.White);
+            }
+
+            _spriteBatch.End();
+        }
+    }
+}
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