From 0107f6a52027c2afffbbdbc6c755a60b3d935c73 Mon Sep 17 00:00:00 2001
From: extrawurst <mail@rusticorn.com>
Date: Tue, 29 Apr 2025 21:08:17 +0200
Subject: [PATCH] wip

---
 assets/maps/map1.map      |  5 +++++
 src/camera.rs             |  3 ++-
 src/tb_entities.rs        | 47 +++++++++++++++++++++++++++++++++++++++
 trenchbroom/hedz/hedz.fgd |  4 ++++
 4 files changed, 58 insertions(+), 1 deletion(-)

diff --git a/assets/maps/map1.map b/assets/maps/map1.map
index c272d08..d3be3a6 100644
--- a/assets/maps/map1.map
+++ b/assets/maps/map1.map
@@ -1530,3 +1530,8 @@
 ( 832 7360 -1568 ) ( 832 7360 -1567 ) ( 832 7361 -1568 ) water [ 0 1 0 0 ] [ 0 0 -1 -32 ] 270 1 1
 }
 }
+// entity 40
+{
+"classname" "decal"
+"origin" "56 -440 -232"
+}
diff --git a/src/camera.rs b/src/camera.rs
index 39f3cd9..d792b31 100644
--- a/src/camera.rs
+++ b/src/camera.rs
@@ -1,5 +1,5 @@
 use avian3d::prelude::*;
-use bevy::prelude::*;
+use bevy::{core_pipeline::prepass::DepthPrepass, prelude::*};
 
 use crate::{
     GameState,
@@ -59,6 +59,7 @@ pub fn plugin(app: &mut App) {
 fn startup(mut commands: Commands) {
     commands.spawn((
         Camera3d::default(),
+        DepthPrepass,
         MainCamera::new(Vec3::new(0., 2.5, -13.)),
         CameraRotationInput::default(),
     ));
diff --git a/src/tb_entities.rs b/src/tb_entities.rs
index b87ddf3..f7ca4b7 100644
--- a/src/tb_entities.rs
+++ b/src/tb_entities.rs
@@ -2,6 +2,7 @@ use avian3d::prelude::*;
 use bevy::{
     ecs::{component::HookContext, world::DeferredWorld},
     math::*,
+    pbr::decal::{ForwardDecal, ForwardDecalMaterial, ForwardDecalMaterialExt},
     prelude::*,
 };
 use bevy_trenchbroom::prelude::*;
@@ -64,6 +65,52 @@ pub struct NamedEntity {
 #[geometry(GeometryProvider::new().convex_collider())]
 pub struct Platform;
 
+#[derive(PointClass, Component, Reflect, Default)]
+#[reflect(Component)]
+#[require(Transform)]
+#[component(on_add = Self::on_add)]
+pub struct Decal;
+
+impl Decal {
+    fn on_add(mut world: DeferredWorld, HookContext { entity, .. }: HookContext) {
+        let Some(server) = world.get_resource::<AssetServer>() else {
+            return;
+        };
+
+        let fence = server.load("textures/fence.png");
+
+        let Some(mut decal_standard_materials) =
+            world.get_resource_mut::<Assets<ForwardDecalMaterial<StandardMaterial>>>()
+        else {
+            return;
+        };
+
+        let decal = decal_standard_materials.add(ForwardDecalMaterial {
+            base: StandardMaterial {
+                base_color_texture: Some(fence),
+                unlit: true,
+                ..default()
+            },
+            extension: ForwardDecalMaterialExt {
+                depth_fade_factor: 1.,
+            },
+        });
+
+        let mut this_transform = *world
+            .get_entity(entity)
+            .unwrap()
+            .get::<Transform>()
+            .unwrap();
+        this_transform.scale = Vec3::splat(100.);
+
+        world.commands().entity(entity).insert((
+            this_transform,
+            ForwardDecal,
+            MeshMaterial3d(decal),
+        ));
+    }
+}
+
 #[derive(PointClass, Component, Reflect, Default)]
 #[reflect(Component)]
 #[require(Transform)]
diff --git a/trenchbroom/hedz/hedz.fgd b/trenchbroom/hedz/hedz.fgd
index 10c1464..92f1181 100644
--- a/trenchbroom/hedz/hedz.fgd
+++ b/trenchbroom/hedz/hedz.fgd
@@ -79,6 +79,10 @@
 [
 ]
 
+@PointClass base(transform) = decal
+[
+]
+
 @PointClass base(transform) model({ "path": "models/alien_naked.glb" }) = enemy_spawn
 [
 	head(string) : "head" : "" : ""