Panda3D
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00001 // Filename: analogNode.cxx 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 #include "analogNode.h" 00016 #include "config_device.h" 00017 #include "dataNodeTransmit.h" 00018 #include "dcast.h" 00019 00020 00021 TypeHandle AnalogNode::_type_handle; 00022 00023 //////////////////////////////////////////////////////////////////// 00024 // Function: AnalogNode::Constructor 00025 // Access: Public 00026 // Description: 00027 //////////////////////////////////////////////////////////////////// 00028 AnalogNode:: 00029 AnalogNode(ClientBase *client, const string &device_name) : 00030 DataNode(device_name) 00031 { 00032 _xy_output = define_output("xy", EventStoreVec2::get_class_type()); 00033 _xy = new EventStoreVec2(LPoint2(0.0f, 0.0f)); 00034 00035 nassertv(client != (ClientBase *)NULL); 00036 PT(ClientDevice) device = 00037 client->get_device(ClientAnalogDevice::get_class_type(), device_name); 00038 00039 if (device == (ClientDevice *)NULL) { 00040 device_cat.warning() 00041 << "Unable to open analog device " << device_name << "\n"; 00042 return; 00043 } 00044 00045 if (!device->is_of_type(ClientAnalogDevice::get_class_type())) { 00046 device_cat.error() 00047 << "Inappropriate device type " << device->get_type() 00048 << " created; expected a ClientAnalogDevice.\n"; 00049 return; 00050 } 00051 00052 _analog = DCAST(ClientAnalogDevice, device); 00053 } 00054 00055 //////////////////////////////////////////////////////////////////// 00056 // Function: AnalogNode::Destructor 00057 // Access: Public, Virtual 00058 // Description: 00059 //////////////////////////////////////////////////////////////////// 00060 AnalogNode:: 00061 ~AnalogNode() { 00062 // When the _analog pointer destructs, the ClientAnalogDevice 00063 // disconnects itself from the ClientBase, and everything that needs 00064 // to get turned off does. Magic. 00065 } 00066 00067 //////////////////////////////////////////////////////////////////// 00068 // Function: AnalogNode::write 00069 // Access: Public, Virtual 00070 // Description: 00071 //////////////////////////////////////////////////////////////////// 00072 void AnalogNode:: 00073 write(ostream &out, int indent_level) const { 00074 DataNode::write(out, indent_level); 00075 00076 if (_analog != (ClientAnalogDevice *)NULL) { 00077 _analog->acquire(); 00078 _analog->write_controls(out, indent_level + 2); 00079 _analog->unlock(); 00080 } 00081 } 00082 00083 //////////////////////////////////////////////////////////////////// 00084 // Function: AnalogNode::do_transmit_data 00085 // Access: Protected, Virtual 00086 // Description: The virtual implementation of transmit_data(). This 00087 // function receives an array of input parameters and 00088 // should generate an array of output parameters. The 00089 // input parameters may be accessed with the index 00090 // numbers returned by the define_input() calls that 00091 // were made earlier (presumably in the constructor); 00092 // likewise, the output parameters should be set with 00093 // the index numbers returned by the define_output() 00094 // calls. 00095 //////////////////////////////////////////////////////////////////// 00096 void AnalogNode:: 00097 do_transmit_data(DataGraphTraverser *, const DataNodeTransmit &, 00098 DataNodeTransmit &output) { 00099 if (is_valid()) { 00100 _analog->poll(); 00101 00102 LPoint2 out(0.0f, 0.0f); 00103 00104 _analog->acquire(); 00105 for (int i = 0; i < max_outputs; i++) { 00106 if (_outputs[i]._index >= 0 && 00107 _analog->is_control_known(_outputs[i]._index)) { 00108 if (_outputs[i]._flip) { 00109 out[i] = -_analog->get_control_state(_outputs[i]._index); 00110 } else { 00111 out[i] = _analog->get_control_state(_outputs[i]._index); 00112 } 00113 } 00114 } 00115 _analog->unlock(); 00116 _xy->set_value(out); 00117 output.set_data(_xy_output, EventParameter(_xy)); 00118 } 00119 }