From e44355bf215283869384eb2eab55a6d49ab094e6 Mon Sep 17 00:00:00 2001
From: Sheldan <5037282+Sheldan@users.noreply.github.com>
Date: Sat, 30 Aug 2025 19:30:49 +0200
Subject: [PATCH] survivors: fixing homing projectiles behaving correctly after
 losing the target

---
 absurd-survivors/src/base.ts       | 6 +++++-
 absurd-survivors/src/main.ts       | 2 +-
 absurd-survivors/src/projectile.ts | 6 +++---
 absurd-survivors/src/weapons.ts    | 2 +-
 4 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/absurd-survivors/src/base.ts b/absurd-survivors/src/base.ts
index 456df9e..496737a 100644
--- a/absurd-survivors/src/base.ts
+++ b/absurd-survivors/src/base.ts
@@ -54,8 +54,12 @@ export class Vector {
         return (this._x * vector._x + this._y * vector._y) / Math.pow(vector.vecLength(), 2);
     }
 
+    dotProduct2(vector: Vector): number {
+        return (this._x * vector._x + this._y * vector._y)
+    }
+
     angleTo(vector: Vector): number {
-        return Math.acos(this.dotProduct(vector))
+        return Math.acos(this.dotProduct2(vector) / (this.vecLength() * vector.vecLength()))
     }
 
     get x(): number {
diff --git a/absurd-survivors/src/main.ts b/absurd-survivors/src/main.ts
index cb4e2b0..10bebdf 100644
--- a/absurd-survivors/src/main.ts
+++ b/absurd-survivors/src/main.ts
@@ -122,7 +122,7 @@ docReady(function () {
     }, 10_000)
 
     player.addWeapon(Pistol.generatePistol(world))
-    player.addWeapon(HomingPistol.generatePistol(world))
+    player.addWeapon(HomingPistol.generateHomingPistol(world))
     hud = new HUD(world);
 
 
diff --git a/absurd-survivors/src/projectile.ts b/absurd-survivors/src/projectile.ts
index ee1bb3f..df0eee3 100644
--- a/absurd-survivors/src/projectile.ts
+++ b/absurd-survivors/src/projectile.ts
@@ -144,7 +144,7 @@ export class HomingProjectile extends Projectile {
             if(target.dead()) {
                 let closestTargetTo = this.world.getClosestTargetTo(this.position)
 
-                let newTargetDirection = Vector.createVector(this.target.getPosition(), this.position)
+                let oldTargetDirection = Vector.createVector(this.target.getPosition(), this.position)
                 let justMovedDirection = Vector.createVector(this.position, this.lastPosition).normalize()
                 let olderMovedDirection: Vector;
                 if(this.secondToLastPosition !== undefined) {
@@ -155,8 +155,8 @@ export class HomingProjectile extends Projectile {
                 if (closestTargetTo !== undefined && closestTargetTo[1] !== undefined) {
                     let newTargetPosition = closestTargetTo[1]!.getPosition();
                     let newDir = Vector.createVector(newTargetPosition, this.position)
-                    let newDirAngle = newDir.angleTo(newTargetDirection);
-                    if(Math.abs(newDirAngle) >= toRad(150)) {
+                    let newDirAngle = newDir.angleTo(oldTargetDirection);
+                    if(Math.abs(newDirAngle) <= toRad(30)) {
                         this.target = closestTargetTo[1]!;
                     } else {
                         if(pointOnLineWithinLine(this.target.getPosition(), this.lastPosition, this.position)) {
diff --git a/absurd-survivors/src/weapons.ts b/absurd-survivors/src/weapons.ts
index 925c108..723da7c 100644
--- a/absurd-survivors/src/weapons.ts
+++ b/absurd-survivors/src/weapons.ts
@@ -100,7 +100,7 @@ export class HomingPistol extends RangeWeapon {
         }
     }
 
-    static generatePistol(world: World, offset?: Vector) {
+    static generateHomingPistol(world: World, offset?: Vector) {
         if(!offset) {
             offset = new Vector(5, 5)
         }