Add horizon shift

TODO.txt

@@ -2,7 +2,6 @@
 
 - replay validation
 - add time slow down setting
-- the horizon on background seems too low? maybe add setting to shift it a bit?
 - add argc/argv to gameInit? could be used to quickly start maps, verify
   replays etc.
 - maybe each map could have a target time embedded: when beaten, the map would
@@ -27,6 +26,7 @@
 =========== HANDLED ==============
 
 - allow stopping car rotation in air like in Trackmania
+- the horizon on background seems too low? maybe add setting to shift it a bit?
 - replay format
 - prevent time overflow! stop incrementing level frame once it's at maximum
 - car shadow? probably would have to be done as screen space effect with

renderer.h

@@ -1312,7 +1312,8 @@ void LCR_rendererDrawSky(int sky, S3L_Unit offsetH, S3L_Unit offsetV)
     anchorPoint[0] += 2 * LCR_IMAGE_SIZE * LCR_SETTING_SKY_SIZE;
 
   anchorPoint[1] = 
-    (LCR_EFFECTIVE_RESOLUTION_Y) / 3 - // 3: we place the center a bit more up
+    (LCR_EFFECTIVE_RESOLUTION_Y) / 2 - // 3: we place the center a bit more up
+    (LCR_SETTING_HORIZON_SHIFT * LCR_EFFECTIVE_RESOLUTION_Y) / 16 -
     (LCR_EFFECTIVE_RESOLUTION_Y * offsetV) / S3L_F
     - LCR_IMAGE_SIZE * LCR_SETTING_SKY_SIZE;
   

settings.h

@@ -204,4 +204,9 @@
   #define LCR_SETTING_REPLAY_MAX_SIZE 256
 #endif
 
+#ifndef LCR_SETTING_HORIZON_SHIFT
+  /** Vertical offset of the background horizon, 1/16th of screen height. */
+  #define LCR_SETTING_HORIZON_SHIFT 5
+#endif
+
 #endif // guard