medfall

commit 76920c4859d9277cfb84398de7c730644e9302dc
parent 78c8e7311abfdd53c8517eb9d4106618e9bf1ca0
Author: Michael Savage <mikejsavage@gmail.com>
Date:   Sun Nov  1 19:32:09 +0000

Don't allow horizons to be below horizontal

Diffstat:
gpubtt.cc
 | 
3
++-
intrinsics.h
 | 
4
++++
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/gpubtt.cc b/gpubtt.cc
@@ -74,7 +74,8 @@ void compute_horizons(
 			hull_size--;
 		}
 
-		horizons[ start.y * hm->width + start.x ] = angle( p, hull[ hull_size - 1 ] );
+		const float horizon = max_f( 0.0, angle( p, hull[ hull_size - 1 ] ) );
+		horizons[ start.y * hm->width + start.x ] = horizon;
 
 		hull[ hull_size ] = p;
 		hull_size++;
diff --git a/intrinsics.h b/intrinsics.h
@@ -43,6 +43,10 @@ inline constexpr size_t gigabytes( const size_t gb ) {
 	return megabytes( gb ) * 1024;
 }
 
+inline float max_f( float a, float b ) {
+	return a > b ? a : b;
+}
+
 inline u32 min_u32( u32 a, u32 b ) {
 	return a < b ? a : b;
 }