From 99c1b05e892fc6412f2fb16c8e10cce8b7fa32d3 Mon Sep 17 00:00:00 2001
From: AqeeAqee <aqee@msn.com>
Date: Sun, 27 Aug 2023 22:09:29 +0800
Subject: [PATCH] fix, crash if ParticleSource.anchor isn't a Sprite

---
 render_raycasting.ts | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/render_raycasting.ts b/render_raycasting.ts
index f3812ce..df4f086 100644
--- a/render_raycasting.ts
+++ b/render_raycasting.ts
@@ -261,9 +261,12 @@ namespace Render {
                     }
                 } else if(spr instanceof particles.ParticleSource){
                     const particle = (spr as particles.ParticleSource)
-                    if (this.spriteParticles.indexOf(particle) < 0) {
-                        this.spriteParticles[(particle.anchor as Sprite).id]=particle
-                        particle.anchor=this.tempSprite
+                    if (this.spriteParticles.indexOf(particle) < 0 && particle.anchor instanceof Sprite) {
+                        const spr = (particle.anchor as Sprite)
+                        if(this.sprites.indexOf(spr)>=0){
+                            this.spriteParticles[spr.id]=particle
+                            particle.anchor=this.tempSprite
+                        }
                     }
                 } else {
                     if (this.spriteLikes.indexOf(spr) < 0)