Add accelerators

TODO.txt

@@ -1,5 +1,8 @@
 =========== GENERAL ==============
 
+- rework the code for special blocks, we have to literally remember the last
+  block, not the pointer, now it won't work e.g. if wanting to repeat an
+  empty block
 - allow stopping car rotation in air like in Trackmania
 - maybe allow some more air control, like slowing down with brakes, like in TM
 - sound engine: probably all SFX will be procedurally generated, ok?

assets.h

@@ -40,7 +40,8 @@ static const char *LCR_maps[] =
   "#=f0s0 #f11d0"
   "#=c0p0 #f11d0"
 
-  "#=C0s1 #fd190" // big dirt
+"#>C0s0 #fd190" // big dirt
+//  "#=C0s1 #fd190" // big dirt
   "#=M0s2 #fd190" // big grass
   "#=W0s3 #fd190" // big ice
 

map.h

@@ -637,6 +637,11 @@ void _LCR_addBlockShapeByte(uint8_t *bytes, uint8_t *byteCount,
   *byteCount += 1;
 }
 
+uint8_t LCR_mapBlockIsAccelerator(uint8_t block)
+{
+  return block == LCR_BLOCK_FULL_ACCEL;
+}
+
 /**
   Macro that transforms coordinates according to block transformation.
 */
@@ -825,9 +830,9 @@ void LCR_mapGetBlockShape(uint8_t blockType, uint8_t transform,
       break;
     }
 
-case LCR_BLOCK_CORNER_CONVEX:
-case LCR_BLOCK_CORNER_CONCAVE:
-{
+    case LCR_BLOCK_CORNER_CONVEX:
+    case LCR_BLOCK_CORNER_CONCAVE:
+    {
       uint8_t
         mx = blockType == LCR_BLOCK_CORNER_CONVEX ? 4 : 2,
         mz = blockType == LCR_BLOCK_CORNER_CONVEX ? 2 : 4;
@@ -845,7 +850,7 @@ case LCR_BLOCK_CORNER_CONCAVE:
       ADD(0,0,0)     ADD(0,0,6)     ADD(mx,0,mz)     // bottom
       ADD(0,0,6)     ADD(6,0,6)     ADD(mx,0,mz)
       break;
-}
+    }
 
     case LCR_BLOCK_BUMP:
       ADD(3,0,0)     ADD(6,0,3)     ADD(3,1,3)       // top

racing.h

@@ -689,13 +689,16 @@ TPE_Unit _LCR_applyMaterialFactor(TPE_Unit value, uint8_t mat)
 }
 
 void _LCR_racingWheelAccelerate(unsigned int wheel, TPE_Vec3 dir,
-  uint8_t material)
+  uint8_t material, uint8_t accelerator)
 {
   TPE_Unit acc =
     _LCR_applyMaterialFactor(LCR_CAR_ACCELERATION,material);
 
   acc = acc / (1 + (LCR_racingGetCarSpeedUnsigned() / LCR_CAR_AIR_FRICTION));
 
+  if (accelerator)
+    acc *= 2; // TODO: constant?
+
   LCR_racing.carBody.joints[wheel].velocity[0] +=
     (dir.x * acc) / TPE_F;
   LCR_racing.carBody.joints[wheel].velocity[1] +=
@@ -727,23 +730,10 @@ uint32_t LCR_racingStep(unsigned int input)
 {
   LCR_LOG2("racing step start");
 
-/*
-for (int i = 0; i < LCR_CAR_JOINTS; ++i)
-  printf("  %d: %d %d %d, %d %d %d\n",
-    i,LCR_racing.carBody.joints[i].position.x,
-    LCR_racing.carBody.joints[i].position.y,
-    LCR_racing.carBody.joints[i].position.z,
-    LCR_racing.carBody.joints[i].velocity[0],
-    LCR_racing.carBody.joints[i].velocity[1],
-    LCR_racing.carBody.joints[i].velocity[0]);
-
-printf("------\n");
-*/
-
-
   uint32_t result = 0;
   TPE_Vec3 carForw, carRight, carUp, carVel;
   uint8_t groundMat = LCR_BLOCK_MATERIAL_CONCRETE; // material under wheels
+  uint8_t onAccel = 0; // standing on accelerator?
   int groundBlockIndex = -1;
 
   carForw = TPE_vec3Normalized(TPE_vec3Plus(
@@ -795,13 +785,20 @@ printf("------\n");
     }
 
     if (groundBlockIndex != -1)
+    {
+      onAccel = LCR_mapBlockIsAccelerator(
+        LCR_currentMap.blocks[groundBlockIndex * LCR_BLOCK_SIZE]);
       groundMat = LCR_mapBlockGetMaterial(
         LCR_currentMap.blocks + groundBlockIndex * LCR_BLOCK_SIZE);
     }
+  }
 
   LCR_racing.carBody.friction =
     _LCR_applyMaterialFactor(LCR_CAR_FORWARD_FRICTION,groundMat);
 
+  if (onAccel)
+    input |= LCR_RACING_INPUT_FORW; // accelerator enforces this
+
   if(!(input & (LCR_RACING_INPUT_FORW | LCR_RACING_INPUT_BACK)))
     LCR_racing.carBody.friction *= LCR_CAR_STAND_FRICTION_MULTIPLIER;
   else if (
@@ -863,13 +860,13 @@ printf("------\n");
     {
       if (input & LCR_RACING_INPUT_FORW)
       {
-        _LCR_racingWheelAccelerate(0,carForw,groundMat);
-        _LCR_racingWheelAccelerate(1,carForw,groundMat);
+        _LCR_racingWheelAccelerate(0,carForw,groundMat,onAccel);
+        _LCR_racingWheelAccelerate(1,carForw,groundMat,onAccel);
       }
       else if (input & LCR_RACING_INPUT_BACK)
       {
-        _LCR_racingWheelAccelerate(0,TPE_vec3TimesPlain(carForw,-1),groundMat);
-        _LCR_racingWheelAccelerate(1,TPE_vec3TimesPlain(carForw,-1),groundMat);
+        _LCR_racingWheelAccelerate(0,TPE_vec3TimesPlain(carForw,-1),groundMat,onAccel);
+        _LCR_racingWheelAccelerate(1,TPE_vec3TimesPlain(carForw,-1),groundMat,onAccel);
       }
     }