portalgun: Change colors on fire (#267)

* portalgun: Change colors on fire

Also fix an (accidental?) global.

* portalgun: Generate colored models once.

pkg/gm/portalgun/gun_portal.lua

@@ -17,14 +17,28 @@
 
 local thisid = ...
 
+local function set_color(new_r, new_g, new_b)
+	return function(r,g,b)
+		if r == 0 and g == 0 and b == 0 then
+			return new_r, new_g, new_b
+		else
+			return r, g, b
+		end
+	end
+end
+
 if client then
-	weapon_models[thisid] = model_load({
+	local base_model = model_load({
 		kv6 = {
 			bdir = DIR_PORTALGUN,
 			name = "portalgun.kv6",
 			scale = 1.0/128.0,
 		},
 	}, {"kv6"})
+	weapon_models[thisid] = {
+		base_model({filt = set_color(0, 92, 172)}),
+		base_model({filt = set_color(240, 92, 28)})
+	}
 end
 
 weapon_names[thisid] = "Portal Gun"
@@ -46,7 +60,7 @@ return function (plr)
 		recoil_x = 0.0001,
 		recoil_y = -0.05,
 
-		model = client and (weapon_models[thisid] {}),
+		model = client and weapon_models[thisid][1],
 
 		name = "Portal Gun",
 	})
@@ -70,15 +84,19 @@ return function (plr)
 	end
 
 	function this.textgen()
-		local cols
-		col = 0xFFC0C0C0
+		local col = 0xFFC0C0C0
 		return col, ((plr.portal_list[1] and "0") or "-")..
 			" "..((plr.portal_list[2] and "0") or "-")
 	end
 
 	function this.click(button, state)
 		if button == 1 or button == 3 then
 			-- LMB
+			if button == 1 then
+				this.cfg.model = client and weapon_models[thisid][1]
+			else
+				this.cfg.model = client and weapon_models[thisid][2]
+			end
 			if this.ammo_clip > 0 then
 				if state then
 					this.portal_select = (button==1 and 1) or 2