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VOP/VOP_Switch.h
/*
* Copyright (c) 2021
* Side Effects Software Inc. All rights reserved.
*
* Redistribution and use of Houdini Development Kit samples in source and
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#ifndef __VOP_Switch_h__
#define __VOP_Switch_h__
#include <VOP/VOP_Node.h>
/// @file
/// This example contains code which shows how to perform some of the most
/// common tasks when writing a custom VEX code operator. It produces code
/// which selects one of the inputs to feed to the output.
namespace HDK_Sample {
/// C++ VOP node to select one of its inputs and feed it into the output.
class VOP_Switch : public VOP_Node
{
public:
/// Creates an instance of this node with the given name in the given network.
const char *name,
OP_Operator *entry);
/// Our parameter templates.
/// Disable our parameters based on which inputs are connected.
bool updateParmsFlags() override;
/// Generate the code for this operator.
void getCode(UT_String &codestr,
const VOP_CodeGenContext &context) override;
/// Provides the labels to appear on input and output buttons.
const char *inputLabel(unsigned idx) const override;
const char *outputLabel(unsigned idx) const override;
/// Controls the number of input buttons visible on the node tile.
unsigned getNumVisibleInputs() const override;
/// Returns the index of the first "unordered" input, meaning that inputs
/// before this one should not be collapsed when they are disconnected.
unsigned orderedInputs() const override;
protected:
VOP_Switch(OP_Network *net, const char *name, OP_Operator *entry);
~VOP_Switch() override;
/// Returns the internal name of the supplied input. This input name is
/// used when the code generator substitutes variables return by getCode.
void getInputNameSubclass(UT_String &in, int idx) const override;
/// Reverse mapping of internal input names to an input index.
int getInputFromNameSubclass(const UT_String &in) const override;
/// Fills in the info about the vop type connected to the idx-th input.
int idx) override;
/// Returns the internal name of the supplied output. This name is used
/// when the code generator substitutes variables return by getCode.
void getOutputNameSubclass(UT_String &out, int idx) const override;
/// Fills out the info about the data type of each output connector.
int idx) override;
/// This methods should be overriden in most VOP nodes. It should fill
/// in voptypes vector with vop types that are allowed to be connected
/// to this node at the input at index idx. Note that
/// this method should return valid vop types even when nothing is
/// connected to the corresponding input.
VOP_VopTypeInfoArray &type_infos) override;
/// Accesses the parameter that controls how out of bounds switch indices
/// are handled.
int OUTOFBOUNDS();
};
} // End of HDK_Sample namespace
#endif