From 68639f9772032f2859db00eef1a3012482807c5e Mon Sep 17 00:00:00 2001
From: UnknownShadow200 <unknownshadow200@gmail.com>
Date: Sun, 23 Feb 2020 00:24:12 +1100
Subject: [PATCH] Make CustomParticle_Render slightly faster

---
 src/Particle.c | 5 ++---
 src/Particle.h | 6 +++---
 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/src/Particle.c b/src/Particle.c
index 428d5b297..f1217acc3 100644
--- a/src/Particle.c
+++ b/src/Particle.c
@@ -322,9 +322,8 @@ static void CustomParticle_Render(struct CustomParticle* p, float t, VertexP3fT2
 	TextureRec rec = e->rec;
 	int x, y, z;
 
-	float frame_time = p->totalLifespan / e->frameCount;
-	float inverted_lifetime = Math_AbsF(p->base.lifetime - p->totalLifespan);
-	int curFrame = Math_Floor(inverted_lifetime / frame_time);
+	float time_lived = p->totalLifespan - p->base.lifetime;
+	int curFrame = Math_Floor(e->frameCount * (time_lived / p->totalLifespan));
 	float shiftU = curFrame * (rec.U2 - rec.U1);
 
 	rec.U1 += shiftU;// * 0.0078125f;
diff --git a/src/Particle.h b/src/Particle.h
index 1d5dad4e8..93e4fd6af 100644
--- a/src/Particle.h
+++ b/src/Particle.h
@@ -26,10 +26,10 @@ struct CustomParticleEffect {
 	cc_bool fullBright;
 	float size;
 	float sizeVariation;
-	float spread; //how far from the spawnpoint their location can vary
-	float speed; //how fast they move away/towards the origin
+	float spread; /* how far from the spawnpoint their location can vary */
+	float speed; /* how fast they move away/towards the origin */
 	float gravity;
-	float baseLifetime; //how long (in seconds) the particle lives for
+	float baseLifetime; /* how long (in seconds) the particle lives for */
 	float lifetimeVariation;
 };