Another change to the Step valuenode. Renamed some parameters and added a new one...

[synfig.git] / synfig-core / trunk / src / synfig / valuenode_step.cpp

diff --git a/synfig-core/trunk/src/synfig/valuenode_step.cpp b/synfig-core/trunk/src/synfig/valuenode_step.cpp
index 8308c8c..130d2b2 100644 (file)
--- a/synfig-core/trunk/src/synfig/valuenode_step.cpp
+++ b/synfig-core/trunk/src/synfig/valuenode_step.cpp
@@ -54,8 +54,9 @@ using namespace synfig;
 ValueNode_Step::ValueNode_Step(const ValueBase &value):
        LinkableValueNode(value.get_type())
 {
-       set_link("width",ValueNode_Const::create(Time(1)));
-       set_link("offset",ValueNode_Const::create(Time(0)));
+       set_link("duration",     ValueNode_Const::create(Time(1)));
+       set_link("start_time",   ValueNode_Const::create(Time(0)));
+       set_link("intersection", ValueNode_Const::create(Real(0.5)));
 
        switch(get_type())
        {
@@ -104,10 +105,11 @@ ValueNode_Step::~ValueNode_Step()
 ValueBase
 ValueNode_Step::operator()(Time t)const
 {
-       Time width ((*width_ )(t).get(Time()));
-       Time offset((*offset_)(t).get(Time()));
+       Time duration    ((*duration_    )(t).get(Time()));
+       Time start_time  ((*start_time_  )(t).get(Time()));
+       Real intersection((*intersection_)(t).get(Real()));
 
-       t = floor((t - offset) / width) * width + offset;
+       t = (floor((t - start_time) / duration) + intersection) * duration + start_time;
 
        switch(get_type())
        {
@@ -155,9 +157,10 @@ ValueNode_Step::set_link_vfunc(int i,ValueNode::Handle value)
 
        switch(i)
        {
-       case 0: CHECK_TYPE_AND_SET_VALUE(link_,   get_type());
-       case 1: CHECK_TYPE_AND_SET_VALUE(width_,  ValueBase::TYPE_TIME);
-       case 2: CHECK_TYPE_AND_SET_VALUE(offset_, ValueBase::TYPE_TIME);
+       case 0: CHECK_TYPE_AND_SET_VALUE(link_,         get_type());
+       case 1: CHECK_TYPE_AND_SET_VALUE(duration_,     ValueBase::TYPE_TIME);
+       case 2: CHECK_TYPE_AND_SET_VALUE(start_time_,   ValueBase::TYPE_TIME);
+       case 3: CHECK_TYPE_AND_SET_VALUE(intersection_, ValueBase::TYPE_REAL);
        }
        return false;
 }
@@ -170,8 +173,9 @@ ValueNode_Step::get_link_vfunc(int i)const
        switch(i)
        {
        case 0: return link_;
-       case 1: return width_;
-       case 2: return offset_;
+       case 1: return duration_;
+       case 2: return start_time_;
+       case 3: return intersection_;
        default:
                return 0;
        }
@@ -180,7 +184,7 @@ ValueNode_Step::get_link_vfunc(int i)const
 int
 ValueNode_Step::link_count()const
 {
-       return 3;
+       return 4;
 }
 
 String
@@ -191,8 +195,9 @@ ValueNode_Step::link_name(int i)const
        switch(i)
        {
        case 0: return "link";
-       case 1: return "width";
-       case 2: return "offset";
+       case 1: return "duration";
+       case 2: return "start_time";
+       case 3: return "intersection";
        default:
                return String();
        }
@@ -206,8 +211,9 @@ ValueNode_Step::link_local_name(int i)const
        switch(i)
        {
        case 0: return _("Link");
-       case 1: return _("Width");
-       case 2: return _("Offset");
+       case 1: return _("Duration");
+       case 2: return _("Start Time");
+       case 3: return _("Intersection");
        default:
                return String();
        }
@@ -216,9 +222,10 @@ ValueNode_Step::link_local_name(int i)const
 int
 ValueNode_Step::get_link_index_from_name(const String &name)const
 {
-       if(name=="link")  return 0;
-       if(name=="width")  return 1;
-       if(name=="offset")  return 2;
+       if(name=="link")         return 0;
+       if(name=="duration")     return 1;
+       if(name=="start_time")   return 2;
+       if(name=="intersection") return 3;
 
        throw Exception::BadLinkName(name);
 }