moonbus: audio visual fuel warning improvement

moonbus.p8

@@ -53,6 +53,8 @@ function load_level()
     
     engine_power=0.1
     fuel_cons=0.01
+    fuel_warning=0.3
+    fuel_warning_on=false
     land_speed_limit=1
     bonus_docked=1
     transed_per_level=5
@@ -125,11 +127,23 @@ function _update()
 
     if plr_engine != -1 then
         sfx(2,2)
-        plr_fuel=max(0,plr_fuel-fuel_cons)
+        plr_fuel=max(0,min(1,plr_fuel-fuel_cons))
     else
         sfx(-1,2)
     end
 
+    if plr_alive and plr_fuel < fuel_warning then
+        if plr_fuel <= 0.01 then
+            sfx(5,3)
+        elseif not fuel_warning_on then
+            fuel_warning_on=true
+            sfx(5,3)
+        end
+    else
+        fuel_warning_on=false
+        sfx(-1,3)
+    end
+
     if plr_docked then
         plr_fuel=min(1,plr_fuel+fuel_cons)
     end
@@ -273,8 +287,10 @@ function _draw()
     local fx=85
     local fy=0
     rect(fx,fy,fx+fw,fy+fh,5)
-    rectfill(fx+1,fy+1,fx+plr_fuel*(fw-1),fy+fh-1,plr_fuel > 0.25 and 13 or 8)
+    if plr_fuel > 0 then
-    print("fuel", fx+3,fy+1,1)
+        rectfill(fx+1,fy+1,fx+1+plr_fuel*(fw-2),fy+fh-1,plr_fuel > fuel_warning and 13 or 8)
+    end
+    print("fuel", fx+3,fy+1,plr_fuel <= fuel_warning and 9 or 1)
 
     -- telemetry
     local cr=10
@@ -725,7 +741,7 @@ __sfx__
 0001002005750087500b7500b7500a750067500375005750087500a7500b7500a75009750047500475006750097500a7500a75009750087500675006750087500a7500a75008750067500675008750097500a750
 00020000226502265026150241501d150161500e1500c150061500315001150001500000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
 010800002605000000260502163021610216102161600000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
-001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+000a00082405024050240500000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
 001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
 001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
 001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000