A test for dust kicked up by cavalry when running.

This was SVN commit r11340.

binaries/data/mods/public/art/actors/particle/dust_cav.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<actor version="1">
+  <group>
+    <variant name="Base">
+      <particles file="dust_cav.xml"/>
+    </variant>
+  </group>
+  <material>basic_trans.xml</material>
+</actor>

binaries/data/mods/public/art/actors/units/romans/cavalry_spearman_e.xml

@@ -54,5 +54,13 @@
       <colour>116 116 116</colour>
     </variant>
   </group>
+  <group>
+    <variant frequency="100" name="Idle"/>
+    <variant name="Run">
+      <props>
+        <prop actor="particle/dust_cav.xml" attachpoint="root"/>
+      </props>
+    </variant>
+  </group>
   <material>objectcolor.xml</material>
 </actor>

binaries/data/mods/public/art/particles/dust_cav.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<particles>
+
+    <texture>art/textures/particles/dust_cav.png</texture>
+    <blend mode="over"/>
+
+    <constant name="emissionrate" value="6.0"/>
+    <uniform name="lifetime" min="1.0" max="4.0"/>
+
+    <constant name="position.y" value="0.0"/>
+
+    <uniform name="angle" min="-3.14" max="3.14"/>
+
+    <uniform name="velocity.x" min="-0.3" max="0.3"/>
+    <uniform name="velocity.y" min="2.0" max="2.5"/>
+    <uniform name="velocity.z" min="-0.5" max="0.5"/>
+    <uniform name="velocity.angle" min="-2.0" max="2.0"/>
+
+    <uniform name="size" min="2.5" max="8.5"/>
+
+    <force y="-0.5"/>
+
+
+</particles>