Add normal-map effect to c172p, including update to paintkit to allow

easy modification.

Aircraft/c172p/Models/bumpspec-fuselage.eff

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Bump and specular effect -->
+<PropertyList>
+  <name>Aircraft/c172p/Models/Effects/bumpspec-fuselage</name>
+  <inherits-from>Effects/bumpspec</inherits-from>
+  <parameters>
+    <texture n="2">
+      <image>Aircraft/c172p/Models/Liveries/fuselage-normal.png</image>
+      <filter>linear-mipmap-linear</filter>
+      <wrap-s>repeat</wrap-s>
+      <wrap-t>repeat</wrap-t>
+      <internal-format>normalized</internal-format>
+    </texture>
+  </parameters>
+</PropertyList>

Aircraft/c172p/Models/bumpspec-tail.eff

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Bump and specular effect -->
+<PropertyList>
+  <name>Aircraft/c172p/Models/Effects/bumpspec-tail</name>
+  <inherits-from>Effects/bumpspec</inherits-from>
+  <parameters>
+    <texture n="2">
+      <image>Aircraft/c172p/Models/Liveries/tail-normal.png</image>
+      <filter>linear-mipmap-linear</filter>
+      <wrap-s>repeat</wrap-s>
+      <wrap-t>repeat</wrap-t>
+      <internal-format>normalized</internal-format>
+    </texture>
+  </parameters>
+</PropertyList>

Aircraft/c172p/Models/bumpspec-wing.eff

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Bump and specular effect -->
+<PropertyList>
+  <name>Aircraft/c172p/Models/Effects/bumpspec-wing</name>
+  <inherits-from>Effects/bumpspec</inherits-from>
+  <parameters>
+    <texture n="2">
+      <image>Aircraft/c172p/Models/Liveries/wing-normal.png</image>
+      <filter>linear-mipmap-linear</filter>
+      <wrap-s>repeat</wrap-s>
+      <wrap-t>repeat</wrap-t>
+      <internal-format>normalized</internal-format>
+    </texture>
+  </parameters>
+</PropertyList>

Aircraft/c172p/Models/c172p.xml

@@ -7,8 +7,34 @@
    <pitch-deg>-3.0</pitch-deg>  
    <z-m> -0.065 </z-m>
  </offsets>
+ 
+ <!-- Normal shader effect. Separate effects required for each normal map texture -->
 
- <nasal>
+ <effect>
+    <inherits-from>Aircraft/c172p/Models/Effects/bumpspec-wing</inherits-from>
+    <object-name>wing_1</object-name>
+    <object-name>flaps</object-name>
+    <object-name>rightaileron</object-name>
+    <object-name>leftaileron</object-name>
+
+ </effect>
+ 
+ <effect>
+    <inherits-from>Aircraft/c172p/Models/Effects/bumpspec-fuselage</inherits-from>
+    <object-name>fuselage_1</object-name>
+ </effect>
+ 
+  <effect>
+    <inherits-from>Aircraft/c172p/Models/Effects/bumpspec-tail</inherits-from>
+    <object-name>vstab</object-name>
+    <object-name>rudder_1</object-name>
+    <object-name>hstab</object-name>
+    <object-name>elevatorleft</object-name>
+    <object-name>elevatorright</object-name>
+ </effect>
+
+
+  <nasal>
    <load>
      var livery_update = aircraft.livery_update.new(
      "Aircraft/c172p/Models/Liveries", 10,