Allow the 'BLine Tangent' to be used to convert angles. The resulting value is the...

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

diff --git a/synfig-core/trunk/src/synfig/valuenode_blinecalctangent.cpp b/synfig-core/trunk/src/synfig/valuenode_blinecalctangent.cpp
index 778fb42..b7bf0d4 100644 (file)
--- a/synfig-core/trunk/src/synfig/valuenode_blinecalctangent.cpp
+++ b/synfig-core/trunk/src/synfig/valuenode_blinecalctangent.cpp
@@ -57,7 +57,7 @@ using namespace synfig;
 ValueNode_BLineCalcTangent::ValueNode_BLineCalcTangent(const ValueBase::Type &x):
        LinkableValueNode(x)
 {
-       if(x!=ValueBase::TYPE_VECTOR)
+       if(x!=ValueBase::TYPE_ANGLE && x!=ValueBase::TYPE_VECTOR)
                throw Exception::BadType(ValueBase::type_name(x));
 
        ValueNode_BLine* value_node(new ValueNode_BLine());
@@ -69,7 +69,7 @@ ValueNode_BLineCalcTangent::ValueNode_BLineCalcTangent(const ValueBase::Type &x)
 LinkableValueNode*
 ValueNode_BLineCalcTangent::create_new()const
 {
-       return new ValueNode_BLineCalcTangent(ValueBase::TYPE_VECTOR);
+       return new ValueNode_BLineCalcTangent(get_type());
 }
 
 ValueNode_BLineCalcTangent*
@@ -95,7 +95,13 @@ ValueNode_BLineCalcTangent::operator()(Time t)const
        BLinePoint blinepoint0, blinepoint1;
 
        if (!looped) size--;
-       if (size < 1) return Vector();
+       if (size < 1)
+               switch (get_type())
+               {
+                       case ValueBase::TYPE_ANGLE:  return Angle();
+                       case ValueBase::TYPE_VECTOR: return Vector();
+                       default: assert(0); return ValueBase();
+               }
        if (loop)
        {
                amount = amount - int(amount);
@@ -121,9 +127,19 @@ ValueNode_BLineCalcTangent::operator()(Time t)const
        etl::derivative< etl::hermite<Vector> > deriv(curve);
 
 #ifdef ETL_FIXED_DERIVATIVE
-       return deriv(amount-from_vertex)*(0.5);
+       switch (get_type())
+       {
+               case ValueBase::TYPE_ANGLE:  return (deriv(amount-from_vertex)*(0.5)).angle();
+               case ValueBase::TYPE_VECTOR: return deriv(amount-from_vertex)*(0.5);
+               default: assert(0); return ValueBase();
+       }
 #else
-       return deriv(amount-from_vertex)*(-0.5);
+       switch (get_type())
+       {
+               case ValueBase::TYPE_ANGLE:  return (deriv(amount-from_vertex)*(-0.5)).angle();
+               case ValueBase::TYPE_VECTOR: return deriv(amount-from_vertex)*(-0.5);
+               default: assert(0); return ValueBase();
+       }
 #endif
 }
 
@@ -219,5 +235,6 @@ ValueNode_BLineCalcTangent::get_link_index_from_name(const String &name)const
 bool
 ValueNode_BLineCalcTangent::check_type(ValueBase::Type type)
 {
-       return type==ValueBase::TYPE_VECTOR;
+       return (type==ValueBase::TYPE_ANGLE ||
+                       type==ValueBase::TYPE_VECTOR);
 }