Revision: 34026
http://brlcad.svn.sourceforge.net/brlcad/?rev=34026&view=rev
Author: homovulgaris
Date: 2009-03-13 18:07:47 +0000 (Fri, 13 Mar 2009)
Log Message:
-----------
adding BranchNode definition and methods to pcMathVM
Modified Paths:
--------------
brlcad/trunk/src/libpc/pcMathVM.cpp
brlcad/trunk/src/libpc/pcMathVM.h
Modified: brlcad/trunk/src/libpc/pcMathVM.cpp
===================================================================
--- brlcad/trunk/src/libpc/pcMathVM.cpp 2009-03-12 22:00:21 UTC (rev 34025)
+++ brlcad/trunk/src/libpc/pcMathVM.cpp 2009-03-13 18:07:47 UTC (rev 34026)
@@ -359,7 +359,49 @@
{
return *fp;
}
+/** BranchNode Methods */
+BranchNode::BranchNode(Stack const & stack1, Stack const & stack2)
+ : func_(stack1, stack2)
+{}
+
+boost::shared_ptr<Node> BranchNode::clone() const
+{
+ return boost::shared_ptr<Node>(new BranchNode(*this));
+}
+
+MathFunction const & BranchNode::func() const
+{
+ return func_;
+}
+
+std::size_t BranchNode::nbranches() const
+{
+ return 2;
+}
+
+Stack * BranchNode::branch(std::size_t i)
+{
+ if (i > 1)
+ return 0;
+ return i == 0 ? &func_.stack1_ : &func_.stack2_;
+}
+
+BranchNode::BranchFunc::BranchFunc(Stack const & stack1, Stack const & stack2)
+ : MathFunction("branch"),
+ stack1_(stack1), stack2_(stack2)
+{}
+
+std::size_t BranchNode::BranchFunc::arity() const
+{
+ return 1;
+}
+
+double BranchNode::BranchFunc::evalp(std::vector<double> const & params) const
+{
+ return evaluate(params[0] ? stack1_ : stack2_);
+}
+
/** Functions assisting evaluation */
NumberNode * getNumberNode(Stack::iterator i)
Modified: brlcad/trunk/src/libpc/pcMathVM.h
===================================================================
--- brlcad/trunk/src/libpc/pcMathVM.h 2009-03-12 22:00:21 UTC (rev 34025)
+++ brlcad/trunk/src/libpc/pcMathVM.h 2009-03-13 18:07:47 UTC (rev 34026)
@@ -255,6 +255,28 @@
private:
boost::shared_ptr<MathFunction> fp;
};
+
+struct BranchNode : public FunctionNode
+{
+ BranchNode(Stack const & stack1, Stack const & stack2);
+ boost::shared_ptr<Node> clone() const;
+ MathFunction const & func() const;
+
+ std::size_t nbranches() const;
+ Stack * branch(std::size_t i);
+private:
+ struct BranchFunc : public MathFunction {
+ BranchFunc(Stack const & stack1, Stack const & stack2);
+
+ std::size_t arity() const;
+ double evalp(std::vector<double> const & params) const;
+
+ Stack stack1_;
+ Stack stack2_;
+ };
+ BranchFunc func_;
+};
+
#endif
/** @} */
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