Panda3D

analogNode.h

00001 // Filename: analogNode.h
00002 // Created by:  drose (12Mar02)
00003 //
00004 ////////////////////////////////////////////////////////////////////
00005 //
00006 // PANDA 3D SOFTWARE
00007 // Copyright (c) Carnegie Mellon University.  All rights reserved.
00008 //
00009 // All use of this software is subject to the terms of the revised BSD
00010 // license.  You should have received a copy of this license along
00011 // with this source code in a file named "LICENSE."
00012 //
00013 ////////////////////////////////////////////////////////////////////
00014 
00015 #ifndef ANALOGNODE_H
00016 #define ANALOGNODE_H
00017 
00018 #include "pandabase.h"
00019 
00020 #include "clientBase.h"
00021 #include "clientAnalogDevice.h"
00022 #include "dataNode.h"
00023 #include "linmath_events.h"
00024 
00025 
00026 ////////////////////////////////////////////////////////////////////
00027 //       Class : AnalogNode
00028 // Description : This is the primary interface to analog controls like
00029 //               sliders and joysticks associated with a ClientBase.
00030 //               This creates a node that connects to the named analog
00031 //               device, if it exists, and provides hooks to the user
00032 //               to read the state of any of the sequentially numbered
00033 //               controls associated with that device.
00034 //
00035 //               Each control can return a value ranging from -1 to 1,
00036 //               reflecting the current position of the control within
00037 //               its total range of motion.
00038 //
00039 //               The user may choose up to two analog controls to
00040 //               place on the data graph as the two channels of an
00041 //               xy datagram, similarly to the way a mouse places its
00042 //               position data.  In this way, an AnalogNode may be
00043 //               used in place of a mouse.
00044 ////////////////////////////////////////////////////////////////////
00045 class EXPCL_PANDA_DEVICE AnalogNode : public DataNode {
00046 PUBLISHED:
00047   AnalogNode(ClientBase *client, const string &device_name);
00048   virtual ~AnalogNode();
00049 
00050   INLINE bool is_valid() const;
00051 
00052   INLINE int get_num_controls() const;
00053 
00054   INLINE double get_control_state(int index) const;
00055   INLINE bool is_control_known(int index) const;
00056 
00057   INLINE void set_output(int channel, int index, bool flip);
00058   INLINE void clear_output(int channel);
00059   INLINE int get_output(int channel) const;
00060   INLINE bool is_output_flipped(int channel) const;
00061 
00062 public:
00063   virtual void write(ostream &out, int indent_level = 0) const;
00064 
00065 private:
00066   class OutputData {
00067   public:
00068     INLINE OutputData();
00069     int _index;
00070     bool _flip;
00071   };
00072 
00073   enum { max_outputs = 2 };
00074   OutputData _outputs[max_outputs];
00075 
00076   PT(ClientAnalogDevice) _analog;
00077 
00078 protected:
00079   // Inherited from DataNode
00080   virtual void do_transmit_data(DataGraphTraverser *trav,
00081                                 const DataNodeTransmit &input,
00082                                 DataNodeTransmit &output);
00083 
00084 private:
00085   // outputs
00086   int _xy_output;
00087 
00088   PT(EventStoreVec2) _xy;
00089 
00090 public:
00091   static TypeHandle get_class_type() {
00092     return _type_handle;
00093   }
00094   static void init_type() {
00095     DataNode::init_type();
00096     register_type(_type_handle, "AnalogNode",
00097                   DataNode::get_class_type());
00098   }
00099   virtual TypeHandle get_type() const {
00100     return get_class_type();
00101   }
00102   virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
00103 
00104 private:
00105   static TypeHandle _type_handle;
00106 };
00107 
00108 #include "analogNode.I"
00109 
00110 #endif
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