plane: added incomplete support for flipping

entities/plane.lua

@@ -84,6 +84,7 @@ local max_motorPower = ENGINE_MAX
 local head_area = 1.0
 local plane_area = 10.0
 local motor_speed_ratio = 80.0
+local flipping_speed = 1.0 / 0.5
 
 local out_of_bounds_coeff_multiplier = 10.0
 
@@ -438,6 +439,26 @@ Plane = Class{
 
 	local motorEffort = (self.motorPower / (math.max(fwd_vel, 100) + 1) - 1) / 2 + 1
 	self.motorSound:setPitch(motorEffort * self.motorPower / ENGINE_MAX + 0.5)
+
+	if self.flipping ~= nil then
+	    self.flipping = self.flipping + flipping_speed * dt
+	    local finished = self.flipping >= 1.0
+	    if finished then
+		self.flipping = 1.0
+	    end
+	    if self.goingRight then
+		self.orientationAngle = 180 * self.flipping
+	    else
+		self.orientationAngle = 180 + 180 * self.flipping
+		if self.orientationAngle >= 360 then
+		    self.orientationAngle = 0
+		end
+	    end
+	    if finished then
+		self.goingRight = not self.goingRight
+		self.flipping = nil
+	    end
+	end
     end;
 
     draw = function(self)
@@ -485,5 +506,11 @@ Plane = Class{
             end
         end
     end;
+
+    flip = function(self, down) 
+	if self.flipping == nil then
+	    self.flipping = 0
+	end
+    end
 }
 

player.lua

@@ -21,6 +21,9 @@ Player = Class{
             end,
             decelerate = function(down)
                 self.plane:decelerate(down)
+            end,
+            flip = function(down)
+                self.plane:flip(down)
             end
         }
 

settings.lua

@@ -16,7 +16,8 @@ KEYMAP = {
         flip       = 'i',
         shoot      = 'o',
         accelerate = 'j',
-        decelerate = 'm'
+        decelerate = 'm',
+        flip       = ','
     },
 
     [2] = {
@@ -25,7 +26,8 @@ KEYMAP = {
         flip       = 'q',
         shoot      = 'w',
         accelerate = 'x',
-        decelerate = 'z'
+        decelerate = 'z',
+        flip       = 'a'
     }
 }