From 29c53aca4ab4879647f0064fb30e02f1b517147c Mon Sep 17 00:00:00 2001
From: Victor Blomqvist <vb@viblo.se>
Date: Tue, 7 May 2024 22:41:36 +0200
Subject: [PATCH] Fix impulse of cpDampedRotarySpring

---
 src/cpDampedRotarySpring.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/cpDampedRotarySpring.c b/src/cpDampedRotarySpring.c
index 8d38a545..a3670c25 100644
--- a/src/cpDampedRotarySpring.c
+++ b/src/cpDampedRotarySpring.c
@@ -65,7 +65,7 @@ applyImpulse(cpDampedRotarySpring *spring, cpFloat dt)
 	
 	//apply_impulses(a, b, spring->r1, spring->r2, cpvmult(spring->n, v_damp*spring->nMass));
 	cpFloat j_damp = w_damp*spring->iSum;
-	spring->jAcc += j_damp;
+	spring->jAcc -= j_damp;
 	
 	a->w += j_damp*a->i_inv;
 	b->w -= j_damp*b->i_inv;