From 4f7fe6cfb2475114620497ffb2fc4534a728c5c3 Mon Sep 17 00:00:00 2001
From: Thomas White <taw@physics.org>
Date: Sat, 15 Jun 2019 10:12:43 +0200
Subject: Flip display of tilt

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

diff --git a/src/nanolight.c b/src/nanolight.c
index 40c8bd1..06012e8 100644
--- a/src/nanolight.c
+++ b/src/nanolight.c
@@ -119,7 +119,7 @@ static void draw_fixture(cairo_t *cr, PangoContext *pc, PangoFontDescription *fo
 		cairo_stroke(cr);
 	}
 	if ( find_attribute(fix, ATT_TILT, &n) ) {
-		double y = h*fix->attr_vals[n] / 65535;
+		double y = h*(1.0 - (double)fix->attr_vals[n] / 65535);
 		cairo_move_to(cr, -1.0, y);
 		cairo_line_to(cr, w+2.0, y);
 		cairo_set_source_rgb(cr, 1.0, 0.0, 0.0);
-- 
cgit v1.2.3