fix vision logic and game tick timer

src/projectile.js

@@ -64,8 +64,24 @@ export default class Projectile {
     if (entities == null) { return }
 
     const entitiesInVisionRange = entities.filter((it) => it.id != this.id && it.distanceTo(this.position) <= this.visionRange + it.radius)
+    const entitiesInLineOfSight = entitiesInVisionRange.filter((it) => this.isInLineOfVision(it.position))
 
-    return entitiesInVisionRange.concat([this]).map((it) => it.id)
+    return entitiesInLineOfSight.concat([this]).map((it) => it.id)
+  }
+
+  isInLineOfVision(destination) {
+    const bbox = Entity.tunnelBbox(this.position.x, this.position.y, destination.x, destination.y, 0)
+    const terrains = this.game?.terrains ?? []
+    const bboxCheckedObstacles = terrains.filter((it) => SATX.bboxCheck(bbox, it.bbox))
+    if (bboxCheckedObstacles.length < 1) { return true }
+
+    const posCollider = Entity.collider(this.position.x, this.position.y, 1) // TODO: magic number for radius
+    const posBbox = Entity.bbox(this.position.x, this.position.y, 1) // TODO: magic number for radius
+    const unpassableTerrain = bboxCheckedObstacles.filter((it) => !(SATX.bboxCheck(posBbox, it.bbox) && it.colliders().some((c) => SATX.collideObject(posCollider, c))))
+
+    const colliders = unpassableTerrain.map((it) => it.colliders()).flat()
+    const collider = Entity.tunnelCollider(this.position.x, this.position.y, destination.x, destination.y, 0)
+    return !colliders.some((it) => SATX.collideObject(collider, it))
   }
 
   setPosition(vector) {
@@ -87,8 +103,9 @@ export default class Projectile {
     if (projectiles == null) { return }
 
     const projectilesInVisionRange = projectiles.filter((it) => this.position.distanceTo(it.position) <= this.visionRange + it.radius)
+    const projectilesInLineOfSight = projectilesInVisionRange.filter((it) => it.visibleThroughTerrain || this.isInLineOfVision(it.position))
 
-    return projectilesInVisionRange.map((it) => it.id)
+    return projectilesInLineOfSight.concat([this]).map((it) => it.id)
   }
 
   #calculateBbox() {