tutorial: minor tweaks.

tutorial/08_fbo.cpp

@@ -44,8 +44,8 @@ public:
         WorldEntity::TickGame(seconds);
 
         m_time += seconds;
-        m_hotspot = 0.4f * vec3(lol::cos(m_time * 2.f) + lol::cos(m_time * 3.3f),
-                                lol::sin(m_time * 4.4f) + lol::sin(m_time * 3.2f),
+        m_hotspot = 0.4f * vec3(lol::sin(m_time * 4.f) + lol::cos(m_time * 5.3f),
+                                lol::sin(m_time * 5.7f) + lol::cos(m_time * 4.4f),
                                 lol::sin(m_time * 5.f));
         m_color = 0.25f * vec3(1.1f + lol::sin(m_time * 1.5f + 1.f),
                                1.1f + lol::sin(m_time * 1.8f + 1.3f),

tutorial/08_fbo.lolfx

@@ -33,10 +33,10 @@ void main(void)
     {
         float tc = 0.0, ta = 0.0;
         {
-            float s = 4.0 + 3.0 * in_Point.z;
+            float s = 6.0 + 3.0 * in_Point.z;
             vec2 p = pass_Position - in_Point.xy * 0.8;
             float t = clamp(1.2 - dot(s * p, s * p), 0.0, 1.0);
-            float u = t * t;
+            float u = t * t * t * t;
             tc += 3.0 * t * t - 2.0 * t * t * t;
             ta += 3.0 * u * u - 2.0 * u * u * u;
         }