From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Thu, 5 Jul 2018 22:22:24 +0000 (+0200)
Subject: Visualize the flow consistently with .flo files (which have y = down).
X-Git-Tag: 1.8.0~76^2~242
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=b69854826898be24a48e77733f629240756073a3;p=nageru

Visualize the flow consistently with .flo files (which have y = down).
---

diff --git a/flow.cpp b/flow.cpp
index e59a481..205b24f 100644
--- a/flow.cpp
+++ b/flow.cpp
@@ -523,7 +523,7 @@ int main(void)
 			float w = dense_flow[(yy * level_width + x) * 3 + 2];
 
 			du = (du / w) * level_width;
-			dv = (dv / w) * level_height;
+			dv = (-dv / w) * level_height;
 
 			uint8_t r, g, b;
 			flow2rgb(du, dv, &r, &g, &b);