From 3fbe81d3883bcc6cf5e121a2c54a4eac9cf59801 Mon Sep 17 00:00:00 2001
From: hheik <4469778+hheik@users.noreply.github.com>
Date: Fri, 1 Sep 2023 19:13:07 +0300
Subject: [PATCH] started working on shadows

---
 src/game/darkness.rs | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/src/game/darkness.rs b/src/game/darkness.rs
index 938ccab..75e618c 100644
--- a/src/game/darkness.rs
+++ b/src/game/darkness.rs
@@ -8,6 +8,7 @@ use bevy::{
     sprite::{Material2dPlugin, Mesh2dHandle},
 };
 use bevy_ecs_ldtk::{LdtkLevel, LevelEvent};
+use bevy_rapier2d::prelude::{Collider, QueryFilter, RapierContext};
 
 mod material;
 
@@ -173,6 +174,8 @@ fn add_to_level(
 fn prepare_lights(
     mut materials: ResMut<Assets<DarknessMaterial>>,
     mut images: ResMut<Assets<Image>>,
+    rapier_context: Res<RapierContext>,
+    visibility_blocker_query: Query<&VisibilityBlocker>,
     material_query: Query<&Handle<DarknessMaterial>>,
     point_light_query: Query<(&GlobalTransform, &PointLight2D)>,
     spot_light_query: Query<(&GlobalTransform, &SpotLight2D)>,
@@ -198,6 +201,7 @@ fn prepare_lights(
             .iter()
             .enumerate()
             .for_each(|(i, (transform, light))| {
+                get_light_geometry(&rapier_context, &visibility_blocker_query, *light);
                 material.point_lights[i] = GpuPointLight2D {
                     position: transform.translation().truncate(),
                     radius: light.radius,
@@ -239,3 +243,21 @@ fn prepare_lights(
             });
     }
 }
+
+fn get_light_geometry(
+    rapier_context: &Res<RapierContext>,
+    visibility_blocker_query: &Query<&VisibilityBlocker>,
+    light: &impl LightAabb,
+) -> Vec<Vec2> {
+    let rect = light.aabb();
+    let collider = Collider::cuboid(rect.half_size().x, rect.half_size().y);
+    let mut filter = QueryFilter::new().exclude_sensors();
+    let predicate = |coll_entity| visibility_blocker_query.get(coll_entity).is_ok();
+    filter.predicate = Some(&predicate);
+    let mut colls = vec![];
+    rapier_context.intersections_with_shape(rect.center(), 0.0, &collider, filter, |coll| {
+        colls.push(coll);
+        true
+    });
+    vec![]
+}