Added a new particle system for the torches and bring back the vignette

data/gfx/gfx_sparkFire_a.xml

@@ -0,0 +1,35 @@
+<?xml version="1.0"?>
+
+<!-- For sky particles, the size of the box is ignored -->
+<particles emitter="box" box_x="0.1" box_y="0.5" box_z="0.1">
+
+    <spreading angle="30"           />
+    
+    <velocity  x="-0.000"
+               y="0.002"
+               z="-0.000"             />
+    
+    <material  file="gfx_sparkFire_a.png" clampu="Y" clampv="Y" />
+    
+    <!-- Amount of particles emitted per second -->
+    <rate      min="20"
+               max="50"           />
+    
+    <!-- Minimal and maximal lifetime of a particle, in milliseconds. -->
+    <lifetime  min="3000"
+               max="3000"          />
+    
+    <!-- Size of the particles -->
+    <size      min="0.2"
+               max="0.3"          />
+    
+    <color     min="40 40 255"
+               max="255 255 255"   />
+    
+    <!-- How much time in milliseconds before the particle is fully faded out  -->
+    <fadeout   time="100"          />
+
+    <wind      speed="0.16"
+               flips="Y"           />
+
+</particles>

data/shaders/tonemap.frag

@@ -43,5 +43,12 @@ void main()
     // Uncharted2 tonemap with Auria's custom coefficients
     vec4 perChannel = (col * (6.9 * col + .5)) / (col * (5.2 * col + 1.7) + 0.06);
     perChannel = pow(perChannel, vec4(2.2));
-    FragColor = vec4(perChannel.xyz, col.a);
+    
+    vec2 inside = uv - 0.5;
+    float vignette = 1 - dot(inside, inside);    
+    vignette = clamp(pow(vignette, 0.8), 0., 1.);
+    //vignette = clamp(vignette + vignette - 0.5, 0., 1.15);
+
+    
+    FragColor = vec4(perChannel.xyz * vignette, col.a);
 }