From 813cab7af711e6312a2185e2a43a535a484d1a3f Mon Sep 17 00:00:00 2001
From: EchoHowardLam <lamyipfu@gmail.com>
Date: Wed, 15 Aug 2018 21:57:12 +0800
Subject: [PATCH] Hotfix endless air current

Fix issue #580
---
 src/simulation/Air.cpp | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/src/simulation/Air.cpp b/src/simulation/Air.cpp
index 1478a8ba2c..718bd6da41 100644
--- a/src/simulation/Air.cpp
+++ b/src/simulation/Air.cpp
@@ -145,14 +145,14 @@ void Air::update_air(void)
 			pv[i][2] = pv[i][2]*0.8f;
 			pv[i][XRES/CELL-2] = pv[i][XRES/CELL-2]*0.8f;
 			pv[i][XRES/CELL-1] = pv[i][XRES/CELL-1]*0.8f;
-			vx[i][0] = vx[i][1]*0.9f;
-			vx[i][1] = vx[i][2]*0.9f;
-			vx[i][XRES/CELL-2] = vx[i][XRES/CELL-3]*0.9f;
-			vx[i][XRES/CELL-1] = vx[i][XRES/CELL-2]*0.9f;
-			vy[i][0] = vy[i][1]*0.9f;
-			vy[i][1] = vy[i][2]*0.9f;
-			vy[i][XRES/CELL-2] = vy[i][XRES/CELL-3]*0.9f;
-			vy[i][XRES/CELL-1] = vy[i][XRES/CELL-2]*0.9f;
+			vx[i][0] = vx[i][0]*0.9f;
+			vx[i][1] = vx[i][1]*0.9f;
+			vx[i][XRES/CELL-2] = vx[i][XRES/CELL-2]*0.9f;
+			vx[i][XRES/CELL-1] = vx[i][XRES/CELL-1]*0.9f;
+			vy[i][0] = vy[i][0]*0.9f;
+			vy[i][1] = vy[i][1]*0.9f;
+			vy[i][XRES/CELL-2] = vy[i][XRES/CELL-2]*0.9f;
+			vy[i][XRES/CELL-1] = vy[i][XRES/CELL-1]*0.9f;
 		}
 		for (i=0; i<XRES/CELL; i++) //reduces pressure/velocity on the edges every frame
 		{
@@ -161,14 +161,14 @@ void Air::update_air(void)
 			pv[2][i] = pv[2][i]*0.8f;
 			pv[YRES/CELL-2][i] = pv[YRES/CELL-2][i]*0.8f;
 			pv[YRES/CELL-1][i] = pv[YRES/CELL-1][i]*0.8f;
-			vx[0][i] = vx[1][i]*0.9f;
-			vx[1][i] = vx[2][i]*0.9f;
-			vx[YRES/CELL-2][i] = vx[YRES/CELL-3][i]*0.9f;
-			vx[YRES/CELL-1][i] = vx[YRES/CELL-2][i]*0.9f;
-			vy[0][i] = vy[1][i]*0.9f;
-			vy[1][i] = vy[2][i]*0.9f;
-			vy[YRES/CELL-2][i] = vy[YRES/CELL-3][i]*0.9f;
-			vy[YRES/CELL-1][i] = vy[YRES/CELL-2][i]*0.9f;
+			vx[0][i] = vx[0][i]*0.9f;
+			vx[1][i] = vx[1][i]*0.9f;
+			vx[YRES/CELL-2][i] = vx[YRES/CELL-2][i]*0.9f;
+			vx[YRES/CELL-1][i] = vx[YRES/CELL-1][i]*0.9f;
+			vy[0][i] = vy[0][i]*0.9f;
+			vy[1][i] = vy[1][i]*0.9f;
+			vy[YRES/CELL-2][i] = vy[YRES/CELL-2][i]*0.9f;
+			vy[YRES/CELL-1][i] = vy[YRES/CELL-1][i]*0.9f;
 		}
 
 		for (j=1; j<YRES/CELL; j++) //clear some velocities near walls