Fix culling bug

TODO.txt

@@ -1,5 +1,8 @@
 =========== GENERAL ==============
 
+- culling is very slow now, it showed that distance bailout can accelerate it
+  a lot, try to make a more accurate bailaout and see if it's faster (watch
+  out for bugs due to false positives)
 - improve the car unstucking? maybe we can just keep the position of the car
   and ONE wheel (other joint positions can be computed)
 - some kind of special map block that would say where 3D triangles don't have

data

@@ -4,9 +4,28 @@
 #Btestmap;
 
 #Maaaaa;4321 0
-:*B1vJ :!wct :!wcA
-:=n0s :fiba
-:xo1t :fgb8
+:*B2vJ
 
-:]o1tI :fg11 :|o2tI :fg11
-:]o1A :fg11 :|o2A :fg11
+box
+:=n0s :fida
+:=n6s2 :fi1a
+:xo2t :fgm8
+
+:^ocs2 :fg11   :vncs2L
+:^ocB2I :fg11  :vEcs2I
+:^nct2J :f118  :vncB2
+:^Ect2L :f118  :vEcB2J
+
+:xo1w :fg12
+
+ramps
+:]o2tI :fg11 :|o3tI :fg11
+:'o1uI :fg11
+:<o1vI :fg11
+
+:]o2A :fg11 :|o3A :fg11
+:'o1z :fg11
+:<o1y :fg11
+
+finish
+:!vdt :!vdA

map.h

@@ -800,9 +800,7 @@ void LCR_mapGetBlockShape(uint8_t blockType, uint8_t transform,
     case LCR_BLOCK_LEFT:
     case LCR_BLOCK_BOTTOM_LEFT:
     case LCR_BLOCK_BOTTOM_LEFT_FRONT:
-
     case LCR_BLOCK_LEFT_FRONT:
-
     case LCR_BLOCK_FULL_ACCEL:
     case LCR_BLOCK_FULL_FAN:
     case LCR_BLOCK_BOTTOM_ACCEL:

racing.h

@@ -54,7 +54,7 @@ typedef int32_t LCR_GameUnit;  ///< abstract game unit
 #include "tinyphysicsengine.h"
 
 #define LCR_GRAVITY (LCR_PHYSICS_UNIT / 160)
-#define LCR_FAN_FORCE 3
+#define LCR_FAN_FORCE 4
 #define LCR_FAN_FORCE_DECREASE 6
 
 #define LCR_CAR_FORWARD_FRICTION (TPE_F / 180)

renderer.h

@@ -594,7 +594,7 @@ uint8_t _LCR_rendererCheckMapTriCover(const S3L_Index *t1, const S3L_Index *t2)
     S3L_abs(vertices[0][0] - vertices[3][0]) +
     S3L_abs(vertices[0][1] - vertices[3][1]) +
     S3L_abs(vertices[0][2] - vertices[3][2]) > 
-    (3 * LCR_RENDERER_UNIT / 2))
+    (3 * LCR_RENDERER_UNIT))
     return 0;
 
   vertices[1] = LCR_renderer.mapVerts + 3 * t1[1];