Add the ability to include stepped texture translations for things like digital displ...

diff --git a/simgear/scene/model/animation.cxx b/simgear/scene/model/animation.cxx
index f9ebc188e81c690ef0325f7490d4f62eb59063cf..1c9c5b02c1f427551565fd451dd1f41c418cd74a 100644 (file)
--- a/simgear/scene/model/animation.cxx
+++ b/simgear/scene/model/animation.cxx
@@ -5,6 +5,7 @@
 
 
 #include <string.h>             // for strcmp()
+#include <math.h>
 
 #include <plib/sg.h>
 #include <plib/ssg.h>
@@ -478,6 +479,7 @@ SGTexTranslateAnimation::SGTexTranslateAnimation( SGPropertyNode *prop_root,
       _prop((SGPropertyNode *)prop_root->getNode(props->getStringValue("property", "/null"), true)),
     _offset_m(props->getDoubleValue("offset-m", 0.0)),
     _factor(props->getDoubleValue("factor", 1.0)),
+    _step(props->getDoubleValue("step",0.0)),
     _table(read_interpolation_table(props)),
     _has_min(props->hasValue("min-m")),
     _min_m(props->getDoubleValue("min-m")),
@@ -500,7 +502,15 @@ void
 SGTexTranslateAnimation::update()
 {
   if (_table == 0) {
-    _position_m = (_prop->getDoubleValue() + _offset_m) * _factor;
+    if(_step > 0) {
+      // apply stepping of input value
+      if(_prop->getDoubleValue() > 0) 
+       _position_m = ((floor(_prop->getDoubleValue()/_step) * _step) + _offset_m) * _factor;
+     else
+      _position_m = ((ceil(_prop->getDoubleValue()/_step) * _step) + _offset_m) * _factor;
+    } else {
+       _position_m = (_prop->getDoubleValue() + _offset_m) * _factor;
+    }
     if (_has_min && _position_m < _min_m)
       _position_m = _min_m;
     if (_has_max && _position_m > _max_m)

diff --git a/simgear/scene/model/animation.hxx b/simgear/scene/model/animation.hxx
index f365ec970fc21965a48ee03bdb2ec384045ea60b..c80edc150e755674a79bcea51c7eb229970b87b2 100644 (file)
--- a/simgear/scene/model/animation.hxx
+++ b/simgear/scene/model/animation.hxx
@@ -1,3 +1,4 @@
+
 // animation.hxx - classes to manage model animation.
 // Written by David Megginson, started 2002.
 //
@@ -261,6 +262,7 @@ private:
   SGPropertyNode_ptr _prop;
   double _offset_m;
   double _factor;
+  double _step;
   SGInterpTable * _table;
   bool _has_min;
   double _min_m;