[Kst] extragear/graphics/kst/plugins/discretizing_filters

[Nicolas Brisset]

SVN commit 488146 by brisset:

Fix remaining bug. Now, it works... If only we could have custom widgets in the plugin interface, this would allow for more convenient filter characteristics input than transfer functions :-)

 M  +4 -6      filter.h  


--- trunk/extragear/graphics/kst/plugins/discretizing_filters/filter.h #488145:488146
@@ -84,15 +84,13 @@
 //------------------------------------------------------------------------------
 template<class S> void filter<S>::NextTimeStep()
 {
-  // intermediate output (with new input, but just before clock)
-  S iOut = (x[n-1] + *in * Nz[n])/ Dz[n];
+  // Compute output
+  out = (x[n-1] + *in * Nz[n])/ Dz[n];
   // update state vector x[0] .. x[n-1] (goes from output to input)
   for (int i=n-1; i>0; i--) {
-    x[i] = x[i-1] + Nz[i]*(*in) - Dz[i]*iOut;
+    x[i] = x[i-1] + Nz[i]*(*in) - Dz[i]*out;
   }
-  x[0] = Nz[0]*(*in) - Dz[0]*iOut;
-  // output
-  out = (x[n-1] + Nz[n]*(*in)) / Dz[n];
+  x[0] = Nz[0]*(*in) - Dz[0]*out;
 }
 //------------------------------------------------------------------------------
 template<class S> filter<S>::~filter()