From d184f795c4a8817cf5fba23ba863ff73243418ac Mon Sep 17 00:00:00 2001
From: Ed <96445749+TheShuEd@users.noreply.github.com>
Date: Wed, 3 Jul 2024 14:38:18 +0300
Subject: [PATCH] not worked

---
 Content.Client/Overlays/StencilOverlay.cs     | 10 ++-
 .../Overlays/StencilOverlay.CloudShadows.cs   | 65 +++++++++++++++++++
 .../DayCycle/CP14CloudShadowsComponent.cs     | 16 +++++
 Resources/Maps/_CP14/alchemy_test.yml         |  1 +
 4 files changed, 90 insertions(+), 2 deletions(-)
 create mode 100644 Content.Client/_CP14/Overlays/StencilOverlay.CloudShadows.cs
 create mode 100644 Content.Shared/_CP14/DayCycle/CP14CloudShadowsComponent.cs

diff --git a/Content.Client/Overlays/StencilOverlay.cs b/Content.Client/Overlays/StencilOverlay.cs
index 22064ae609..14a86e5854 100644
--- a/Content.Client/Overlays/StencilOverlay.cs
+++ b/Content.Client/Overlays/StencilOverlay.cs
@@ -1,6 +1,7 @@
 using System.Numerics;
 using Content.Client.Parallax;
 using Content.Client.Weather;
+using Content.Shared._CP14.DayCycle;
 using Content.Shared._CP14.WorldEdge;
 using Content.Shared.Salvage;
 using Content.Shared.Weather;
@@ -73,12 +74,17 @@ public sealed partial class StencilOverlay : Overlay
             DrawRestrictedRange(args, restrictedRangeComponent, invMatrix);
         }
 
-        //CP14 World Edge overlay
+        //CP14 Overlays
+        if (_entManager.TryGetComponent<CP14CloudShadowsComponent>(mapUid, out var shadows))
+        {
+            DrawCloudShadows(args, shadows, invMatrix);
+        }
+
         if (_entManager.TryGetComponent<CP14WorldEdgeComponent>(mapUid, out var worldEdge))
         {
             DrawWorldEdge(args, worldEdge, invMatrix);
         }
-        //CP14 World Edge overlay end
+        //CP14 Overlays end
 
         args.WorldHandle.UseShader(null);
         args.WorldHandle.SetTransform(Matrix3x2.Identity);
diff --git a/Content.Client/_CP14/Overlays/StencilOverlay.CloudShadows.cs b/Content.Client/_CP14/Overlays/StencilOverlay.CloudShadows.cs
new file mode 100644
index 0000000000..a6bc8bf36b
--- /dev/null
+++ b/Content.Client/_CP14/Overlays/StencilOverlay.CloudShadows.cs
@@ -0,0 +1,65 @@
+using System.Numerics;
+using Content.Shared._CP14.DayCycle;
+using Robust.Client.Graphics;
+using Robust.Shared.Utility;
+
+namespace Content.Client.Overlays;
+
+public sealed partial class StencilOverlay
+{
+    private void DrawCloudShadows(in OverlayDrawArgs args, CP14CloudShadowsComponent cloudComp, Matrix3x2 invMatrix)
+    {
+        var worldHandle = args.WorldHandle;
+        var mapId = args.MapId;
+        var worldAABB = args.WorldAABB;
+        var worldBounds = args.WorldBounds;
+        var position = args.Viewport.Eye?.Position.Position ?? Vector2.Zero;
+
+        // Cut out the irrelevant bits via stencil
+        // This is why we don't just use parallax; we might want specific tiles to get drawn over
+        // particularly for planet maps or stations.
+        worldHandle.RenderInRenderTarget(_blep!, () =>
+        {
+            var xformQuery = _entManager.GetEntityQuery<TransformComponent>();
+            _grids.Clear();
+
+            // idk if this is safe to cache in a field and clear sloth help
+            _mapManager.FindGridsIntersecting(mapId, worldAABB, ref _grids);
+
+            foreach (var grid in _grids)
+            {
+                var matrix = _transform.GetWorldMatrix(grid, xformQuery);
+                var matty =  Matrix3x2.Multiply(matrix, invMatrix);
+                worldHandle.SetTransform(matty);
+
+                foreach (var tile in grid.Comp.GetTilesIntersecting(worldAABB))
+                {
+                    // Ignored tiles for stencil
+                    if (_weather.CanWeatherAffect(grid.Owner, grid, tile))
+                    {
+                        continue;
+                    }
+
+                    var gridTile = new Box2(tile.GridIndices * grid.Comp.TileSize,
+                        (tile.GridIndices + Vector2i.One) * grid.Comp.TileSize);
+
+                    worldHandle.DrawRect(gridTile, Color.White);
+                }
+            }
+
+        }, Color.Transparent);
+
+        worldHandle.SetTransform(Matrix3x2.Identity);
+        worldHandle.UseShader(_protoManager.Index<ShaderPrototype>("StencilMask").Instance());
+        worldHandle.DrawTextureRect(_blep!.Texture, worldBounds);
+        var curTime = _timing.RealTime;
+        var sprite = _sprite.GetFrame(new SpriteSpecifier.Texture(new ResPath("/Textures/Parallaxes/AspidParallaxNeb.png")), curTime);
+
+        // Draw the rain
+        worldHandle.UseShader(_protoManager.Index<ShaderPrototype>("StencilDraw").Instance());
+        _parallax.DrawParallax(worldHandle, worldAABB, sprite, curTime, position, cloudComp.CloudSpeed, modulate: Color.White.WithAlpha(cloudComp.Alpha));
+
+        worldHandle.SetTransform(Matrix3x2.Identity);
+        worldHandle.UseShader(null);
+    }
+}
diff --git a/Content.Shared/_CP14/DayCycle/CP14CloudShadowsComponent.cs b/Content.Shared/_CP14/DayCycle/CP14CloudShadowsComponent.cs
new file mode 100644
index 0000000000..8f7cbb9a60
--- /dev/null
+++ b/Content.Shared/_CP14/DayCycle/CP14CloudShadowsComponent.cs
@@ -0,0 +1,16 @@
+using System.Numerics;
+
+namespace Content.Shared._CP14.DayCycle;
+
+/// <summary>
+/// if added to the map, renders cloud shadows on the map
+/// </summary>
+[RegisterComponent]
+public sealed partial class CP14CloudShadowsComponent : Component
+{
+    [DataField]
+    public Vector2 CloudSpeed = new Vector2(0.5f, 0f);
+
+    [DataField]
+    public float Alpha = 1f;
+}
diff --git a/Resources/Maps/_CP14/alchemy_test.yml b/Resources/Maps/_CP14/alchemy_test.yml
index 7e5296d4a5..abd82c7106 100644
--- a/Resources/Maps/_CP14/alchemy_test.yml
+++ b/Resources/Maps/_CP14/alchemy_test.yml
@@ -36,6 +36,7 @@ entities:
     - type: OccluderTree
     - type: LoadedMap
     - type: MapLight
+    - type: CP14CloudShadows
     - type: CP14WorldEdge
       range: 30
     - type: CP14DayCycle