Annotation of loncom/homework/functionplotresponse.pm, revision 1.43
1.1 www 1: # LearningOnline Network with CAPA
2: # option list style responses
3: #
1.43 ! www 4: # $Id: functionplotresponse.pm,v 1.42 2010/11/20 00:14:44 www Exp $
1.1 www 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29: package Apache::functionplotresponse;
30: use strict;
31: use Apache::response();
32: use Apache::lonlocal;
33: use Apache::lonnet;
1.36 www 34:
1.1 www 35: BEGIN {
1.37 www 36: &Apache::lonxml::register('Apache::functionplotresponse',('functionplotresponse','backgroundplot','spline',
37: 'functionplotrule','functionplotruleset',
38: 'functionplotelements'));
1.1 www 39: }
40:
1.5 www 41: #
42: # There can be a number of applets on a page, each called ggbApplet_$id,
43: # where $id is the "_"-concatenated part and responseid
44: #
45:
1.1 www 46: sub geogebra_startcode {
1.3 www 47: my ($id)=@_;
1.1 www 48: return (<<ENDSTARTCODE);
1.3 www 49: <applet name="ggbApplet_$id" code="geogebra.GeoGebraApplet" archive="geogebra.jar"
1.40 www 50: codebase="/adm/geogebra/" width="722" height="447" MAYSCRIPT>
1.1 www 51: <param name="java_arguments" value="-Xmx512m -Djnlp.packEnabled=true"/>
52: ENDSTARTCODE
53: }
54:
55: sub geogebra_endcode {
1.2 www 56: return &Apache::lonhtmlcommon::java_not_enabled()."</applet>\n";
57: }
58:
1.5 www 59: #
60: # This is the internal GeoGebra bytecode which defines the spline functions
61: #
1.2 www 62: sub geogebra_spline_program {
63: return (<<ENDSPLINEPROGRAM);
1.42 www 64: <param name="ggbBase64" value="UEsDBBQACAAIANOAcz0AAAAAAAAAAAAAAAASAAAAZ2VvZ2VicmFfbWFjcm8ueG1s7Vxtb6tGGv3c/grEh1Vuu4njlzje2/hW5b1Sb3ulu1qttGorYhPHrQ0WJomnv74zA9hxgGuGNfYYnw/JYDwM8ByYM545z7n7fjWfKc9euJwG/lBtX12riuePgvHUnwzVp+jhcqB+/+Hru4kXTLz70FUegnDuRkO1e9VVldVy+t4Pfnbn3nLhjrzPo0dv7v4UjNyIt/YYRYv3rdbLy8tVevxVEE5ak0l0tVqO6fHzmb8cqsnGe9rc1kEvXV69c33dbv33409x85dTfxm5/shTFXpdc3cUBspoPmYXMVQ/L2ZT3+uoShQEs5xdjjdbrHf971P7n8pn+vepQ8vOr6oyHQW+NZ157JKWj8HLj/6/6UGaGw7VKHzy1PSEP/qLp0hxr4fqD6ritmnh0rIzVDVadGnhqq207i9P0bryc1JbS2o/82r0pEva/IgFTYmmUXx+9yl6DEK2NXYjtofW9Gbe3PMjJSILumcRTP1IVWbuvTdjV/Lh66/u2FUrwf0f3ihKrjn9/sGdLT12vq/u6Pd6MAtChTZP8Z7w//f8vztbPLp0iz4HvOrMJV6oPLsz9m2yhzb3MRh7W3tdfzrnqCvLyFuwBto0hAvPGycPVXzJdGNBm+QP16sLGgVBOF4qq/jEChmqPVb+FR/Lq/Cb/Tz9Kzlt9/XeiMxeX81dK4nTjohpjYhY54ARo4/5/x2yzs2NPEHrH+Ixa0rQevsO2moRektGPGkk3PvfV5R/Vot482L1ThkqFxQs5Rtl9dtF9+r6nXKpdNPPHfb5W6XNCrrj4gf2Kf72YlO986b6Kqns0u/4EReX22f4dvsMcXUtt+3tKqxF7Z2qtDJPxMOTz7t3detOM49FHPa0Dn9I6up+GAPG4ESP09GfPgWCPmavngW24UzHY48NC0pBRzbQETHoiAh0RAw6shs6IgodOWHoRsF87vpjxeejI/0pfPZ0N4y85dT1+W1N14Mb/g5G7+JBC0eVf6Ajlyge53C2dnuvuoLg1WhHi0+dnDAT2BE79Wh96jXHVKRl3kXWFt5+tfB+nIZhEL4JKx8ssmFgNmTuP9xFsPzuy4F7y8nJMTseybpZZsMTlym7dvZEFCViqiUx1TIx1SrEVJMupte1hvQ/9N5yHtMkCOkvnMzT+vzlmD7Hra4f1Ocjj4OyI5l0zLxpSrhrTZqND1qy/7RnW3dqvAL9uRpGnxgiMT9uv+VCmGhbmGhZTDQxTDRgEmOiFWDSev3jnH3mv+mLJh662YmHbnbioftm4oGWXVp29zsBwXlZp8UNLUrPR8RH68nRmJ/A/ATmJzA/cRpBw/wE5icwP4H5CcxPfOnN+AIT6I0YcLz9IVEnd+pN4c5+7dx5P1pzJ9sU5c78TrKAO5Pusix36ru5U2ct6uU6YH6np9sB50JHNtAJc6cAdEQMOrIbOiIK3ZlwJ38HU+7kqIpwp6ZX4k6tIsNIwp2Y28fc/snN7eeGVE9CqmdCqlcIqS5dSOt9SrFcguWS88akaLmkBCb6FiZ6FhNdDBMdmMSY6HtZwupll7B62SWsXsESFi17tOzVupSluP2hatDilhaVV7bi1oykNax0FY1KsNKFlS6sdMkVNKx0YaULK11Y6cJKF1a6sNKFlS6sdGGlCytdWOk6CHcajeDO/gG502gKdw5q587ReM2dbFOUO/M7yQLuTLrLstxp7OZOg7VolOuA+Z2ebgecCx3ZQCfMnQLQETHoyG7oiCh0Z8Kd/B1MuZOjKsKdulGJO/WKDCMJd0IlApUIVCJQieSG1EhCamRCalQIqSFdSHu1hhTCGwhvzhsTCG/kw6RIeFMCE2MLEyOLiSGGiQFMYkyMvYihbrJiqJusGOpmhxiKlje0vDmkKEpxB0PVpMW/aLE3jVTcupm0Ds1U0RgdmilopqCZkito0ExBMwXNFDRT0ExBMwXNFDRT0ExBMwXNFDRT0ExBMwXNFDRT0ExBMwXNlITcaTaCOwcH5E6zKdzZvq6dPMfemjzZpih55veSBeSZ9JdlydPcTZ4ma9Es1wPzOz3dHjgXOrKBTpg8BaAjYtCR3dARUejOhDz5O5iSJ0dVhDwNsxJ5GhUpRhLyhOAYguMaYgrBMQTH5y44zg2pmYTUzITUrBBSU7qQ9msNKTTch9RBQsMtHybQcMuHCTTc8mFSpOEugYm5hYmZxcQUw8QEJjEm5l509f2srr6f1dX3S+rqadmnZf+I+nraBm3LYiVtzKpNcB+fz0rPBwV+0Y9WKPChwIcCX66gQYEPBT4U+FDgQ4EPBT4U+FDgQ4EPBT4U+FDgQ4EPBT4U+FDgQ4EPBT4U+BJyJxT4otwJBT4U+FDgQ4EvC3RQ4B+NPK1GkGf7kAvrVmPYc+/rxJku2HtYsyfbFGXP/G6ygD2TDrMse1q72dNiLVrlumB+p6fbBedCRzbQCbOnAHREDDqyGzoiCt2ZsCd/B1P25KiKsKdpVWJPsyLHSMKeyF9D/loNMUX+GvLXkL+G/LVDhNRKQmplQmpVCKklXUgHtYYUKYGVh6lICWwEJkgJlA8TpATKhwlSAuXDpCglsAQm1hYmVhYTSwwTC5jEmFh7SdO8zaZp3mbTNG8F0zRpeUvLW5nSNekGbc1mJW3OPlz+ZnIFdnoFyOgsmsZBRicyOpHRKVfQkNGJjE5kdCKjExmdyOhERicyOpHRiYxOZHQioxMZncjoREYnMjqR0YmMTmR0SsidyOgU5U5kdCKjExmdyOiUBTpkdB6NPJHRiYxOZHQioxMZnScLHTI6j8aedjPY85AiK7sx7Fm/YOhhsmZPtinKnvndZAF7Jh1mWfa0d7OnzVq0y3XB/E5PtwvOhY5soBNmTwHoiBh0ZDd0RBS6M2FP/g6m7MlRFWFPy67EnlZFjpGEPeGHAD+EGmIKPwT4IcAPAX4I8EOQ3Q8hN6R2ElI7E1K7Qkht6ULarpef4DFReegPj4lGYAKPCfkwgceEfJjAY0I+TOAxIR8mRR4TJTCxtzCxs5jYYpjYwCTGxC7ARMz3Y5D1/RhkfT8GFX0/aDmg5UBq/w+6QdtzWEkbdI5pCJJck5NeEyxCimY2YRECixBYhMgVNFiEwCIEFiGwCIFFCCxCYBECixBYhMAiBBYhsAg5CHfCIkSUO2ERUpo7YRFyIh0wLEJOFjpYhByNO2ERIsqdsAiBRQgsQmARIgt0sAg5GnnCIkSYPWERAosQWITAIkQW6GARcjT2hEWIMHvCIgQWIbAIgUWILNDBIuRo7Ok0gz0PqRhyGsOe9UuGJo9r9mSbouyZ300WsGfSYZZlT2c3ezqsRadcF8zv9HS74FzoyAY6YfYUgI6IQUd2Q0dEoTsT9uTvYMqeHFUR9rSdSuxpV+QYSdgTBlsw2KohpjDYgsEWDLZgsAWDLRhsnZ/BVm5MnSSmTiamToWYOvLFtF6CgmlZ5Z9TMC1rBCYwLZMPE5iWyYcJTMvkwwSmZfJhAtMy+TApMi0rgYmzhYmTxcQRw8QBJjEmTgEmhUZyrYkXTLz70P3wN1BLBwgzo6j6TgoAAFNMAQBQSwMEFAAIAAgA04BzPQAAAAAAAAAAAAAAABYAAABnZW9nZWJyYV9qYXZhc2NyaXB0LmpzSyvNSy7JzM9TSE9P8s/zzMss0dBUqK7lAgBQSwcIRczeXRoAAAAYAAAAUEsDBBQACAAIANOAcz0AAAAAAAAAAAAAAAAMAAAAZ2VvZ2VicmEueG1svVfbjts2EH1OvmKg540tUqQugb1BNiiaFtugqNug6JsscW0isiiIlL0u8vEdkpJXTtIFixYFbPF25j6ckVZvHg8NHEWvpWrXEVnEEYi2UrVsd+toMA+v8ujN7cvVTqid2PYlPKj+UJp1lCySCB61fN2qD+VB6K6sxKbai0N5r6rSOG57Y7rXy+XpdFpM9AvV75a73XbxqGukPzStXkfj5DWyuyI6JQ5O45gsf//p3rN/JVttyrYSEVi9Bnn78sXqJNtaneAka7NfR1lGItgLudujojznESxvX6w6NLITlZFHoZFytgRZryNz6CLLqitbe/7Cz6C5WBNBLY+yFv06iheMZzlLC05jEidZivJUL0VrRiyxIpHZcuK2Okpx8mztzElkERilmm2JHNM0gqPUctuIdfRQNhrNk+1Dj669rLU5N8Khx40n3cgNStTyTwSjtyLw/kBFb+IbFru/12gmnswkmn74hwIncRnnYeLovzIwmeQlPLmWR/9GXj7zLsEMAnxQ+0jg82c7cnADG5epX2bjMreP4hmdvctCXET4LCI8vnE/9/86Js+lwX8ncbWc0nE1+gj03mLHPDDigNcyhqQAXjiHAEcPciAFpOghQEdyYLjO4QYySOwegwRyKHCDJMAYjtyeMu/RFDiBlEHq3Q4JA54AIYigDIDGQKmdE6AYIOAcOJJklhu1DJIUWIqrJAeGWsWISZAGpyiXQkIgsXSUW4oM0hxoCqllSVCoDS6nkMaQEsuNxcAIMCcxA5pDYunSMfZjtoz5YjPGDcwP3A+pHzIYXSrbbjBXbqwO9TQ1qrvEC9FYF56qj68T18Vp6eraSgxVI2tZth8xXBZnwwuXMmev3lTmGC0ip0elVF9vzhpjCI9/iF7hncnYImOc5yknhOQ2rc/+hBK+4FlR5GnOKccZ1iRdlTb7OFmkaZEUlOe04EWMss7TEVvwBHmlOYuLAk+9ZHHcCGOwcWgoH4WebN/1sp7Pf9B3qqkv7uiUbM27sjND73oOXu/emvS23TViY5PdJTbW/urTVj1ufIInntev5w5XsZe/3b1TjeoBrwa1rtmN49aPDmMVu6Bih4kdYuRhmV7OSUEdwo1bPzpUI1uv2mgomawk8SRGanehkfk8JZpyKxrbSoZWmvtpYWT16clSi/8wHLaYEROZZfeuV9peStuhO6WlTZW3uD858lou+T/lrpZfJOpKd70oa70XwnwzdeOnxB09NqNA/w+HdnLfJdmfw5FAHA3EJYE4Fojjgbg0EJcF4vJAXBHq5+CAhEaEhIaEhMaEhAaFhEaFhIaFhMaFhAaGhEaGhkaGBt+V0MjQ0MjQ0MjQb0RGNLY9qhZgv6l61TSuOhxn88oxcNPevR2Oxbo8K+zMrr59P+tFdv3ek9/Z16mn3Y/f3L1Dplr0P+MbffP0yooHXvH3aIe4IvgF+btNuNTTplGnDfZ5WTbf1dKo/qp6z5wxCgOoxUM5NGbk4IrtV8V19Un0qJTv/i124EENGo5lc8W9RrEHXPqDsZOVtsv+hk3B79Zi14uplzTui833OXcaz98wvtheLSclrA4atfXRMtLY/oK2D2Zv7f3Rfi3CfYnfnOaM31SlsceWwZzOvQON34y3fwFQSwcI3KfwzsQEAAClDgAAUEsBAhQAFAAIAAgA04BzPTOjqPpOCgAAU0wBABIAAAAAAAAAAAAAAAAAAAAAAGdlb2dlYnJhX21hY3JvLnhtbFBLAQIUABQACAAIANOAcz1FzN5dGgAAABgAAAAWAAAAAAAAAAAAAAAAAI4KAABnZW9nZWJyYV9qYXZhc2NyaXB0LmpzUEsBAhQAFAAIAAgA04BzPdyn8M7EBAAApQ4AAAwAAAAAAAAAAAAAAAAA7AoAAGdlb2dlYnJhLnhtbFBLBQYAAAAAAwADAL4AAADqDwAAAAA=" />
1.2 www 65: ENDSPLINEPROGRAM
66: }
67:
1.5 www 68: #
69: # The standard set of parameters inside <applet>
70: #
1.2 www 71: sub geogebra_default_parameters {
1.3 www 72: my ($id)=@_;
1.2 www 73: return(<<ENDDEFAULTPARAMETERS);
74: <param name="image" value="/adm/lonIcons/lonanim.gif" />
75: <param name="boxborder" value="false" />
76: <param name="centerimage" value="true" />
1.39 www 77: <param name="cache_archive" value="geogebra.jar, geogebra_main.jar, geogebra_gui.jar, geogebra_cas.jar, geogebra_algos.jar, geogebra_export.jar, geogebra_javascript.jar, jlatexmath.jar, jlm_greek.jar, jlm_cyrillic.jar, geogebra_properties.jar" />
78: <param name="cache_version" value="3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0" />
1.2 www 79: <param name="framePossible" value="false" />
80:
81: <param name="showResetIcon" value="false" />
82: <param name="showAnimationButton" value="false" />
83: <param name="enableRightClick" value="false" />
84: <param name="errorDialogsActive" value="true" />
85: <param name="enableLabelDrags" value="false" />
86: <param name="showMenuBar" value="false" />
87: <param name="showToolBar" value="false" />
88: <param name="showToolBarHelp" value="false" />
89: <param name="showAlgebraInput" value="false" />
90: <param name="enableShiftDragZoom" value="false" />
91: <param name="allowRescaling" value="false" />
92: <param name="enableLabelDrags" value="false" />
1.3 www 93: <param name="ggbOnInitParam" value="applet_$id" />
1.2 www 94: ENDDEFAULTPARAMETERS
1.1 www 95: }
96:
1.5 www 97: #
98: # This subroutine is called by LON-CAPA at </problem>
99: # Each applet on the page will call function ggbOnInit when it is done loading
100: # This function in turn will call the respective function registered by start_init_script
101: # Which one of the registered functions is called is determined by ggbOnInitParam, which GeoGebra passes to ggbOnInit
102: #
103:
1.3 www 104: sub init_script {
1.16 www 105: if ($#Apache::functionplotresponse::callscripts>=0) {
106: my $script='';
107: foreach my $id (@Apache::functionplotresponse::callscripts) {
108: $script.="if (param=='applet_$id') { loaded_$id=true; }\n";
109: }
110: $script.="if (".join(' && ',map { "loaded_$_" } (@Apache::functionplotresponse::callscripts)).
1.17 www 111: ") { setTimeout('ggbInitAll()',20) }";
1.16 www 112: my $calls=join("\n",map { "ggbInit_$_();" } (@Apache::functionplotresponse::callscripts));
1.3 www 113: return (<<ENDGGBINIT);
114: <script type="text/javascript">
115: // <![CDATA[
1.16 www 116: // Function that each applet will call when loaded
117: // It will pass "its" parameter
118: // Set flags for when an applet is loaded, wait till all are loaded, and then some
1.3 www 119: function ggbOnInit(param) {
1.16 www 120: $script
121: }
122: function ggbInitAll() {
1.17 www 123: $calls
1.3 www 124: }
125: // ]]>
126: </script>
127: ENDGGBINIT
128: }
129: }
130:
1.5 www 131: #
132: # Each Geogebra applet is supposed to call this when parameters change
1.10 www 133: # Changes the hidden fields on the web page
1.5 www 134: #
135: sub update_script {
136: my ($id)=@_;
137: return (<<ENDUPDATESCRIPT);
138: <script type="text/javascript">
139: // <![CDATA[
140: function updatePointCoordinates_$id(coordinateName) {
141: var x = document.ggbApplet_$id.getXcoord(coordinateName);
142: var y = document.ggbApplet_$id.getYcoord(coordinateName);
1.9 www 143: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_x"].value = x;
144: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_y"].value = y;
1.5 www 145: }
146: // ]]>
147: </script>
148: ENDUPDATESCRIPT
149: }
150:
151: #
152: # Register the above update-handler for a variable
153: #
154:
155: sub update_register {
156: my ($id,$variable)=@_;
1.6 www 157: return "document.ggbApplet_$id.registerObjectUpdateListener('$variable','updatePointCoordinates_$id');\n";
158: }
159:
160: #
1.40 www 161: # Set a point coordinate variable
1.6 www 162: #
1.40 www 163: sub set_point_coordinate {
1.6 www 164: my ($id,$variable,$x,$y)=@_;
165: return (<<ENDSETVARIABLE);
1.9 www 166: document.ggbApplet_$id.evalCommand("$variable=($x,$y)");
1.40 www 167: document.ggbApplet_$id.setLabelVisible("$variable",false);
1.6 www 168: ENDSETVARIABLE
169: }
170:
171: #
1.40 www 172: # Set a slope coordinate variable
173: #
174: sub set_slope_coordinate {
175: my ($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname)=@_;
176: my $xvariable=$variable.'x';
177: my $yvariable=$variable.'y';
178: my $domain=$xmax-$xmin;
179: my $range=$ymax-$ymin;
180: my $xinterval=$domain/100.;
181: my $yinterval=$range/200.;
182: return (<<ENDSETSVARIABLE);
183: document.ggbApplet_$id.evalCommand("$xvariable=Slider[0,$domain,$xinterval]");
184: document.ggbApplet_$id.setVisible("$xvariable", false);
185: document.ggbApplet_$id.evalCommand("$xvariable=$xrel");
186: document.ggbApplet_$id.evalCommand("$yvariable=Slider[-$range,$range,$yinterval]");
187: document.ggbApplet_$id.setVisible("$yvariable", false);
188: document.ggbApplet_$id.evalCommand("$yvariable=$yrel");
189: document.ggbApplet_$id.evalCommand("$variable=($xvariable+x($pointname),$yvariable+y($pointname))");
190: document.ggbApplet_$id.setLabelVisible("$variable", false);
191: ENDSETSVARIABLE
192: }
193:
194: #
1.9 www 195: # Input field name for a coordinate variable
196: #
197:
198: sub field_name {
199: my ($id,$variable,$name)=@_;
200: return "HWVAL_$id\_$variable\_$name";
201: }
202:
203: #
204: # Generate an input field for a coordinate variable
205: #
206:
207: sub generate_input_field {
208: my ($id,$variable,$x,$y)=@_;
209: $Apache::functionplotresponse::inputfields.=
210: "<input type='hidden' name='".&field_name($id,$variable,'x')."' value='$x' />\n".
211: "<input type='hidden' name='".&field_name($id,$variable,'y')."' value='$y' />\n";
212: }
213:
214: #
1.40 www 215: # Initialize a new point coordinate variable at set a listener on it
1.6 www 216: #
1.40 www 217: sub new_point_coordinate {
1.6 www 218: my ($id,$variable,$x,$y)=@_;
1.11 www 219: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
1.10 www 220: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
221: }
1.11 www 222: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
1.10 www 223: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
224: }
1.9 www 225: &generate_input_field($id,$variable,$x,$y);
1.40 www 226: return &set_point_coordinate($id,$variable,$x,$y).&update_register($id,$variable);
227: }
228:
229: #
230: # Initialize a new slope coordinate variable at set a listener on it
231: #
232: sub new_slope_coordinate {
233: my ($id,$variable,$x,$y,$pointname,$xp,$yp,$xmin,$xmax,$ymin,$ymax)=@_;
234: #
235: # $variable: name of the slope point
236: # $x, $y: coordinates of the slope point
237: # $pointname: name of the associated point point
238: # $xp $yp: coordinates of the point point
239: #
240: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
241: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
242: }
243: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
244: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
245: }
246: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')})) {
247: $xp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')};
248: }
249: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')})) {
250: $yp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')};
251: }
252:
253: &generate_input_field($id,$variable,$x,$y);
254: my $xrel=$x-$xp;
255: my $yrel=$y-$yp;
256: return &set_slope_coordinate($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname).&update_register($id,$variable);
1.5 www 257: }
258:
259: #
260: # This registers the init-function call for ggbOnInit, which LON-CAPA will place at </problem>
261: # It then starts the right headers
262: #
1.3 www 263: sub start_init_script {
264: my ($id)=@_;
1.16 www 265: # Add id to the list of ggbInit_$id functions that need to be called
266: push(@Apache::functionplotresponse::callscripts,$id);
1.5 www 267: # ... and open this function
1.3 www 268: return (<<ENDSTARTINIT);
269: <script type="text/javascript">
270: // <![CDATA[
1.5 www 271: // variable that will eventually be passed back to the server
272: var coordinateMap_$id = [];
1.16 www 273: // flag for not loaded yet
274: var loaded_$id=false;
1.5 www 275: // Init-function for applet
1.3 www 276: function ggbInit_$id() {
277: ENDSTARTINIT
278: }
279:
1.5 www 280: #
281: # This sets the axes inside ggbInit_$id
282: #
283:
1.4 www 284: sub axes_script {
285: my ($id,$xmin,$xmax,$ymin,$ymax,$xvisible,$yvisible,$gvisible)=@_;
286: return (<<ENDAXESSCRIPT);
287: // changes (xmin, xmax, ymin, ymax)
288: document.ggbApplet_$id.setCoordSystem($xmin,$xmax,$ymin,$ymax);
289:
290: // makes the (x,y) axis (in)visible
291: document.ggbApplet_$id.setAxesVisible($xvisible,$yvisible);
292: // makes the grid (in)visible
293: document.ggbApplet_$id.setGridVisible($gvisible);
294: ENDAXESSCRIPT
295: }
296:
1.14 www 297: sub axes_label {
298: my ($id,$xlabel,$ylabel)=@_;
299: unless ($xlabel || $ylabel) { return ''; }
300: my $return='document.ggbApplet_'.$id.'.evalCommand("topRight=Corner[3]");';
301: if ($xlabel) {
302: $return.=(<<ENDXAXISLABELSCRIPT);
303: document.ggbApplet_$id.evalCommand("Xlabel=(x(topRight)-AxisStepX[],AxisStepY[]/6)");
304: document.ggbApplet_$id.setVisible("Xlabel",false);
305: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", Xlabel]");
306: ENDXAXISLABELSCRIPT
307: }
308: if ($ylabel) {
309: $return.=(<<ENDYAXISLABELSCRIPT);
310: document.ggbApplet_$id.evalCommand("Ylabel=(AxisStepX[]/6,y(topRight)-AxisStepY[]/3)");
311: document.ggbApplet_$id.setVisible("Ylabel",false);
312: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", Ylabel]");
313: ENDYAXISLABELSCRIPT
314: }
315: return $return;
316: }
317:
1.4 www 318: sub plot_script {
1.41 www 319: my ($id,$function,$fixed,$label,$xmin,$xmax)=@_;
320: $label=~s/\W//g;
321: if (($label) && ($label!~/^[A-Za-z]/)) {
322: $label='C'.$label;
323: }
324: my $visible=0;
325: if ($label) {
326: $visible="1";
327: } else {
328: $Apache::functionplotresponse::counter++;
329: $label='C'.$Apache::functionplotresponse::counter;
330: }
1.6 www 331: if ($fixed) {
1.43 ! www 332: return "document.ggbApplet_$id.evalCommand('$label=Function[$function,$xmin,$xmax]');\n".
! 333: ($visible?'':"document.ggbApplet_$id.setLabelVisible('$label', false);\n");
1.6 www 334: } else {
335: return "document.ggbApplet_$id.evalCommand('y=$function')";
336: }
1.4 www 337: }
338:
1.5 www 339: #
1.7 www 340: # Subroutine that generates code for spline $label based on stored information
1.6 www 341: #
342:
343: sub generate_spline {
1.40 www 344: my ($id,$label,$xmin,$xmax,$ymin,$ymax)=@_;
1.6 www 345: my $result='';
1.7 www 346: my $order=$Apache::functionplotresponse::splineorder{$label};
347: my $x=$Apache::functionplotresponse::splineinitx{$label};
348: my $y=$Apache::functionplotresponse::splineinity{$label};
349: my $sx=$Apache::functionplotresponse::splinescalex{$label};
350: my $sy=$Apache::functionplotresponse::splinescaley{$label};
351: my @coords=();
352: foreach my $i (1..$order) {
1.40 www 353: $result.=&new_point_coordinate($id,$label.'P'.$i,$x,$y);
354: my $xp=$x;
1.8 www 355: $x+=$sx/(2.*($order-1));
1.7 www 356: push(@coords,$label.'P'.$i);
1.40 www 357: $result.=&new_slope_coordinate($id,$label.'S'.$i,$x,$y+$sy,$label.'P'.$i,$xp,$y,$xmin,$xmax,$ymin,$ymax);
1.8 www 358: $x+=$sx/(2.*($order-1));
1.7 www 359: push(@coords,$label.'S'.$i);
360: }
361: $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n";
1.6 www 362: return $result;
363: }
364: #
365: # <backgroundplot function="..." fixed="yes/no" />
1.5 www 366: #
1.4 www 367: sub start_backgroundplot {
368: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
369: my $result='';
370: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1];
371: my $function=&Apache::lonxml::get_param('function',$parstack,$safeeval);
1.41 www 372: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
1.6 www 373: my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0);
374:
1.4 www 375: unless ($function) { $function="0"; }
376: if ($target eq 'web') {
1.41 www 377: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3);
378: $result.=&plot_script($internalid,$function,$fixed,$label,$xmin,$xmax);
1.13 www 379: } elsif ($target eq 'edit') {
380: $result=&Apache::edit::tag_start($target,$token,'Background Function Plot').
381: &Apache::edit::text_arg('Function:','function',
382: $token,'16').
1.41 www 383: &Apache::edit::text_arg('Label on Plot:','label',
384: $token,'8').
1.13 www 385: &Apache::edit::select_arg('Fixed location:','fixed',
386: ['yes','no'],$token).
387: &Apache::edit::end_row();
388: } elsif ($target eq 'modified') {
389: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.41 www 390: $safeeval,'function','label','fixed');
1.13 www 391: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
392: }
393: return $result;
1.4 www 394: }
395:
396: sub end_backgroundplot {
1.13 www 397: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
398: my $result='';
399: if ($target eq 'edit') {
400: $result=&Apache::edit::end_table();
401: }
402: return $result;
1.6 www 403: }
404:
405: #
1.25 www 406: # <functionplotrule ... />
1.12 www 407: #
1.25 www 408: sub start_functionplotrule {
1.12 www 409: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
410: my $result='';
1.24 www 411: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
412: $Apache::functionplotresponse::counter++;
413: if ($label=~/\W/) {
1.25 www 414: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
1.24 www 415: }
416: $label=~s/\W//gs;
417: unless ($label) {
418: $label='R'.$Apache::functionplotresponse::counter;
419: } else {
420: $label='R'.$label;
421: }
422: if ($Apache::functionplotresponse::splineorder{$label}) {
1.25 www 423: &Apache::lonxml::error(&mt('Rule indices must be unique.'));
1.24 www 424: }
425:
426:
427: if ($target eq 'grade') {
428: # Simply remember - in order - for later
1.25 www 429: my $beginninglabel=&Apache::lonxml::get_param('xinitiallabel',$parstack,$safeeval);
430: my $endinglabel=&Apache::lonxml::get_param('xfinallabel',$parstack,$safeeval);
1.24 www 431: if (($beginninglabel=~/\W/) || ($endinglabel=~/W/)) {
1.25 www 432: &Apache::lonxml::warning(&mt('Rule labels must be alphanumeric.'));
1.24 www 433: }
434: $beginninglabel=~s/\W//gs;
435: $endinglabel=~s/\W//gs;
436: my $relationship=&Apache::lonxml::get_param('relationship',$parstack,$safeeval);
437: $relationship=~s/\W//gs;
438: $relationship=lc($relationship);
439: unless ($relationship=~/^(eq|ge|gt|le|lt|ne)$/) {
1.25 www 440: &Apache::lonxml::warning(&mt('Rule relationship not defined.'));
1.24 www 441: $relationship='eq';
442: }
1.35 www 443: my $derivative=&Apache::lonxml::get_param('derivativeorder',$parstack,$safeeval);
1.42 www 444: unless (($derivative==-1) || ($derivative==0) || ($derivative==1) || ($derivative==2)) {
1.25 www 445: &Apache::lonxml::warning(&mt('Rule derivative not defined.'));
1.24 www 446: $derivative=0;
447: }
1.25 www 448: push(@Apache::functionplotresponse::functionplotrules,join(':',(
1.24 www 449: $label,
450: $derivative,
1.25 www 451: &Apache::lonxml::get_param('xinitial',$parstack,$safeeval),
1.24 www 452: $beginninglabel,
1.25 www 453: &Apache::lonxml::get_param('xfinal',$parstack,$safeeval),
1.24 www 454: $endinglabel,
1.35 www 455: &Apache::lonxml::get_param('minimumlength',$parstack,$safeeval),
456: &Apache::lonxml::get_param('maximumlength',$parstack,$safeeval),
1.24 www 457: $relationship,
1.33 www 458: &Apache::lonxml::get_param('value',$parstack,$safeeval),
459: &Apache::lonxml::get_param('percenterror',$parstack,$safeeval)
1.24 www 460: )));
461: } elsif ($target eq 'edit') {
1.29 www 462: $result=&Apache::edit::tag_start($target,$token,'Function Plot Evaluation Rule').
1.36 www 463: &Apache::edit::text_arg('Index/Name:','index',
464: $token,'10').' '.
1.35 www 465: &Apache::edit::select_arg(&mt('Function:'),'derivativeorder',
1.29 www 466: [['0','Function itself'],
467: ['1','First derivative'],
1.42 www 468: ['2','Second derivative'],
469: ['-1','Integral']],$token).'<br />'.
1.29 www 470: &Apache::edit::text_arg('(Initial) x-value:','xinitial',
1.35 www 471: $token,'8').
1.30 www 472: &Apache::edit::select_or_text_arg('(Initial) x-value label:','xinitiallabel',
1.32 www 473: [['start','Start of Plot']],$token,'8').'<br />'.
1.30 www 474:
475: &Apache::edit::text_arg('Optional final x-value for ranges:','xfinal',
1.35 www 476: $token,'8').
1.30 www 477: &Apache::edit::select_or_text_arg('Optional final x-value label:','xfinallabel',
1.32 www 478: [['end','End of Plot']],$token,'8').'<br />'.
1.35 www 479: &Apache::edit::text_arg('Optional minimum length for range:','minimumlength',
480: $token,'8').
481: &Apache::edit::text_arg('Optional maximum length for range:','maximumlength',
482: $token,'8').'<br />'.
1.38 www 483: &Apache::edit::select_or_text_arg(&mt('Relationship:'),'relationship',
1.29 www 484: [['eq','equal'],
485: ['ne','not equal'],
486: ['ge','greater than or equal'],
487: ['gt','greater than'],
488: ['lt','less than'],
489: ['le','less than or equal']],$token).
490: $result.= &Apache::edit::select_or_text_arg('Value:','value',
1.35 www 491: [['undef','not defined']],$token,'8').
1.29 www 492: &Apache::edit::text_arg('Percent error:','percenterror',
1.35 www 493: $token,'8').
1.29 www 494: &Apache::edit::end_row();
495: } elsif ($target eq 'modified') {
496: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.35 www 497: $safeeval,'index','derivativeorder',
498: 'xinitial','xinitiallabel','xfinal','xfinallabel',
499: 'minimumlength','maximumlength',
500: 'relationship','value','percenterror');
1.29 www 501: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
1.13 www 502: }
1.12 www 503: return $result;
504: }
505:
1.25 www 506: sub end_functionplotrule {
1.13 www 507: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
508: my $result='';
509: if ($target eq 'edit') {
510: $result=&Apache::edit::end_table();
511: }
512: return $result;
1.12 www 513: }
514:
515:
516: #
1.23 www 517: # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." />
1.6 www 518: #
519: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them
520: #
521: sub start_spline {
522: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.13 www 523: my $result='';
524: if ($target eq 'web') {
1.23 www 525: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
1.13 www 526: $Apache::functionplotresponse::counter++;
527: if ($label=~/\W/) {
1.23 www 528: &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.'));
1.13 www 529: }
530: $label=~s/\W//gs;
1.23 www 531: unless ($label) {
532: $label='S'.$Apache::functionplotresponse::counter;
533: } else {
534: $label='S'.$label;
535: }
1.13 www 536: if ($Apache::functionplotresponse::splineorder{$label}) {
1.23 www 537: &Apache::lonxml::error(&mt('Spline indices must be unique.'));
1.13 www 538: }
539:
540: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval);
541: if ($order<2) { $order=2; }
542: if ($order>8) { $order=8; }
543: $Apache::functionplotresponse::splineorder{$label}=$order;
544:
545: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval);
546: unless ($x) { $x=0; }
547: $Apache::functionplotresponse::splineinitx{$label}=$x;
548:
549: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval);
550: unless ($y) { $y=0; }
551: $Apache::functionplotresponse::splineinity{$label}=$y;
552:
553: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval);
554: unless ($sx) { $sx=$order; }
555: $Apache::functionplotresponse::splinescalex{$label}=$sx;
556:
557: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval);
558: unless ($sy) { $sy=2; }
559: $Apache::functionplotresponse::splinescaley{$label}=$sy;
560: } elsif ($target eq 'edit') {
561: $result=&Apache::edit::tag_start($target,$token,'Spline').
1.23 www 562: &Apache::edit::text_arg('Index:','index',
1.14 www 563: $token,'4').' '.
1.13 www 564: &Apache::edit::select_arg('Order:','order',
1.14 www 565: ['2','3','4','5','6','7','8','9'],$token).' '.
1.13 www 566: &Apache::edit::text_arg('Initial x-value:','initx',
1.14 www 567: $token,'4').' '.
1.13 www 568: &Apache::edit::text_arg('Initial y-value:','inity',
1.14 www 569: $token,'4').' '.
1.13 www 570: &Apache::edit::text_arg('Scale x:','scalex',
1.14 www 571: $token,'4').' '.
1.13 www 572: &Apache::edit::text_arg('Scale y:','scaley',
573: $token,'4').
574: &Apache::edit::end_row();
575: } elsif ($target eq 'modified') {
576: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.23 www 577: $safeeval,'index','order','initx','inity',
1.13 www 578: 'scalex','scaley');
579: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
580: }
581: return $result;
1.6 www 582: }
583:
584: sub end_spline {
1.13 www 585: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
586: my $result='';
587: if ($target eq 'edit') {
588: $result=&Apache::edit::end_table();
589: }
590: return $result;
1.4 www 591: }
592:
1.3 www 593: sub end_init_script {
594: return (<<ENDENDINIT);
595: }
596: // ]]>
597: </script>
598: ENDENDINIT
599: }
600:
1.10 www 601: #
602: # Storing and restoring spline coordinates from part answers
603: #
604: sub decode_previous_answer {
605: my ($answer)=@_;
606: foreach my $coordinate (split(/\,/,$answer)) {
607: my ($key,$value)=split(/\=/,$coordinate);
608: $Apache::functionplotresponse::previous{$key}=$value;
609: }
610: }
611:
612: sub get_answer_from_form_fields {
613: my ($id)=@_;
614: my $answer='';
615: my %coords=();
616: foreach my $field (keys(%env)) {
617: if ($field=~/^form\.HWVAL\_$id/) {
618: $field=~/^form\.(.*)$/;
619: $coords{$1}=$env{$field};
620: }
621: }
622: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords))));
623: return ($answer,%coords);
624: }
625:
1.15 www 626: #
627: # The following functions calculate the cubic-hermite splines server-side
628: #
629:
630: sub cubic_hermite {
631: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 632: return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 3.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+
633: (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 3.*($t*$t*$t-$t*$t) *($s2-$p2);
1.15 www 634: }
635:
636: #
637: # d/dt(...)
638: #
639:
640: sub ddt_cubic_hermite {
641: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 642: return (6.*$t*$t-6.*$t) *$p1 + 3.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+
643: (-6.*$t*$t+6.*$t)*$p2 + 3.*(3.*$t*$t-2.*$t) *($s2-$p2);
1.15 www 644: }
645:
646: #
647: # d^2/dt^2(...)
648: #
649:
650: sub d2dt2_cubic_hermite {
651: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 652: return (12.*$t-6.) *$p1 + 3.*(6.*$t-4.)*($s1-$p1)+
653: (-12.*$t+6.)*$p2 + 3.*(6.*$t-2.)*($s2-$p2);
1.15 www 654: }
655:
656: #
1.18 www 657: # Array index calculation
658: #
659: sub array_index {
660: my ($xmin,$xmax,$x)=@_;
1.38 www 661: if ($x ne '') {
662: return int(($x-$xmin)/($xmax-$xmin)*400.+0.5);
663: } else {
664: return undef;
665: }
1.20 www 666: }
667:
668: #
1.18 www 669: # Populate the arrays
670: #
671:
672: sub populate_arrays {
673: my ($id,$xmin,$xmax)=@_;
1.26 www 674: for (my $i=0; $i<=400; $i++) {
1.35 www 675: $Apache::functionplotresponse::actualxval[$i]=undef;
1.19 www 676: $Apache::functionplotresponse::func[$i]=undef;
1.22 www 677: $Apache::functionplotresponse::dfuncdx[$i]=undef;
1.19 www 678: $Apache::functionplotresponse::d2funcd2x[$i]=undef;
1.18 www 679: }
1.19 www 680: unless ($xmax>$xmin) { return 'no_func'; }
1.18 www 681: # Run over all splines in response
682: foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) {
1.19 www 683: my $xiold=-1;
1.18 www 684: # Run over all points in spline
1.19 www 685: for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) {
1.18 www 686: my $ni=$i+1;
687: my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'},
688: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'},
689: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'},
690: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'});
691: my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'},
692: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'},
693: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'},
694: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'});
695: # Run in small steps over spline parameter
1.26 www 696: for (my $t=0; $t<=1; $t+=0.0001) {
1.35 www 697: my $xreal=&cubic_hermite($t,@xparms);
698: my $xi=&array_index($xmin,$xmax,$xreal);
1.19 www 699: if ($xi<$xiold) { return 'no_func'; }
1.26 www 700: if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) {
1.19 www 701: if (defined($Apache::functionplotresponse::func[$xi])) { return 'no_func'; }
1.18 www 702: $xiold=$xi;
1.35 www 703: $Apache::functionplotresponse::actualxval[$xi]=$xreal;
1.22 www 704: # Function value
1.30 www 705: my $funcval=&cubic_hermite($t,@yparms);
706: $Apache::functionplotresponse::func[$xi]=$funcval;
707: if (defined($funcval)) {
708: if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) {
709: $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi;
710: }
711: if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) {
712: $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi;
713: }
714: }
1.28 www 715: # Chain rule
1.22 www 716: # dy/dx=dy/dt/(dx/dt)
717: my $dxdt=&ddt_cubic_hermite($t,@xparms);
718: if ($dxdt) {
719: $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt;
1.34 www 720: # Second derivative
1.28 www 721: $Apache::functionplotresponse::d2funcdx2[$xi]=
1.34 www 722: ($dxdt*&d2dt2_cubic_hermite($t,@yparms)-&ddt_cubic_hermite($t,@yparms)*&d2dt2_cubic_hermite($t,@xparms))/
723: ($dxdt*$dxdt*$dxdt);
1.22 www 724: }
1.18 www 725: }
726: }
727: }
728: }
729: }
730:
731: #
1.37 www 732: # Implementation of <functionplotresponse>
1.15 www 733: #
734:
1.1 www 735: sub start_functionplotresponse {
736: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
737: my $result='';
1.6 www 738: # To remember the splines - somehow, they need to come last
739: undef %Apache::functionplotresponse::splineorder;
740: undef %Apache::functionplotresponse::splineinitx;
741: undef %Apache::functionplotresponse::splineinity;
742: undef %Apache::functionplotresponse::splinescalex;
743: undef %Apache::functionplotresponse::splinescaley;
1.10 www 744: # Remember input fields, etc
745: undef %Apache::functionplotresponse::previous;
1.9 www 746: $Apache::functionplotresponse::inputfields='';
1.6 www 747: $Apache::functionplotresponse::counter=0;
1.24 www 748: # Remember rules
1.25 www 749: undef @Apache::functionplotresponse::functionplotrules;
1.37 www 750: # Remember failed rules
751: if ($target eq 'grade') {
752: undef @Apache::functionplotresponse::failedrules;
753: }
754: # Delete previous awards
755: undef $Apache::functionplotresponse::awarddetail;
1.10 www 756: # Part and ID
757: my $partid=$Apache::inputtags::part;
758: my $id=&Apache::response::start_response($parstack,$safeeval);
1.6 www 759: # Internal ID to mark the applet and its coordinates
1.10 www 760: my $internalid = $partid.'_'.$id;
761: # Previous answer
762: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"});
763:
1.6 www 764: # Parameters of <functionplotresponse>
1.41 www 765: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval);
1.6 www 766: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
767: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
768: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
1.14 www 769: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval);
770: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval);
1.12 www 771: if ($target eq 'edit') {
772: $result.=&Apache::edit::start_table($token)
773: .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>'
774: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1.37 www 775: .&Apache::edit::deletelist($target,$token).' '
776: .&Apache::edit::insertlist($target,$token)
1.12 www 777: .'</span></td>'
778: ."<td> "
779: .&Apache::edit::end_row()
780: .&Apache::edit::start_spanning_row()
781: ."\n";
1.14 www 782: $result.=&Apache::edit::text_arg('Label x-axis:','xlabel',
783: $token,'6').' '.
784: &Apache::edit::text_arg('Minimum x-value:','xmin',
785: $token,'4').' '.
1.12 www 786: &Apache::edit::text_arg('Maximum x-value:','xmax',
1.14 www 787: $token,'4').' '.
1.12 www 788: &Apache::edit::select_arg('x-axis visible:','xaxisvisible',
1.32 www 789: ['yes','no'],$token).'<br />'.
1.14 www 790: &Apache::edit::text_arg('Label y-axis:','ylabel',
791: $token,'6').' '.
1.12 www 792: &Apache::edit::text_arg('Minimum y-value:','ymin',
1.14 www 793: $token,'4').' '.
1.12 www 794: &Apache::edit::text_arg('Maximum y-value:','ymax',
1.14 www 795: $token,'4').' '.
1.12 www 796: &Apache::edit::select_arg('y-axis visible:','yaxisvisible',
1.32 www 797: ['yes','no'],$token).'<br />'.
1.12 www 798: &Apache::edit::select_arg('Grid visible:','gridvisible',
799: ['yes','no'],$token).
800: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
801: } elsif ($target eq 'modified') {
802: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.14 www 803: $safeeval,'xlabel','xmin','xmax','ylabel','ymin','ymax',
1.12 www 804: 'xaxisvisible','yaxisvisible','gridvisible');
805: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.3 www 806:
1.12 www 807: } elsif ($target eq 'meta') {
1.10 www 808: $result=&Apache::response::meta_package_write('functionplotresponse');
1.35 www 809: } elsif (($target eq 'answer') &&
810: ($env{'form.answer_output_mode'} ne 'tex') &&
811: ($Apache::lonhomework::viewgrades == 'F')) {
812: my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser();
813: my $windowopen=&Apache::lonhtmlcommon::javascript_docopen();
814: my $start_page = &Apache::loncommon::start_page('Rules Log', undef,
815: {'only_body' => 1,
816: 'bgcolor' => '#FFFFFF',
817: 'js_ready' => 1,});
818: my $end_page = &Apache::loncommon::end_page({'js_ready' => 1,});
819: $uname =~s/\W//g;
820: $udom =~s/\W//g;
821: my $function_name =
822: join('_','LONCAPA_scriptvars',$uname,$udom,
823: $env{'form.counter'},$Apache::lonxml::curdepth);
824: my $rules_var ="<script type=\"text/javascript\">
825: // <![CDATA[
826: function $function_name() {newWindow=open('','new_W','width=500,height=500,scrollbars=1,resizable=yes');newWindow.$windowopen;newWindow.document.writeln('$start_page<pre>".
827: $Apache::functionplotresponse::ruleslog.
828: "<\\/pre>$end_page');newWindow.document.close();newWindow.focus()}
829: // ]]>
830: </script><a href=\"javascript:$function_name();void(0);\">".&mt('Rules Log')."</a><br />";
831: &Apache::lonxml::add_script_result($rules_var);
832: }
833:
1.1 www 834: return $result;
835: }
836:
1.25 www 837: sub compare_rel {
1.26 www 838: my ($relationship,$value,$realval,$tol)=@_;
1.36 www 839: # is the real value undefined?
1.26 www 840: unless (defined($realval)) {
1.36 www 841: # the real value is not defined
1.26 www 842: if ($relationship eq 'eq') {
843: if ($value eq 'undef') {
844: return 1;
845: } else {
846: return 0;
847: }
848: } elsif ($relationship eq 'ne') {
849: if ($value eq 'undef') {
850: return 0;
851: } else {
852: return 1;
853: }
854: } else {
855: return 0;
856: }
857: }
858:
1.36 www 859: # is the expected value undefined?
860: if ($value eq 'undef') {
861: # but by now we know that the real value is defined
862: return 0;
863: }
864:
865: # both are defined.
1.26 www 866: if ($relationship eq 'gt') {
867: return ($realval>$value);
868: } elsif ($relationship eq 'ge') {
869: return ($realval>$value-$tol);
870: } elsif ($relationship eq 'lt') {
871: return ($realval<$value);
872: } elsif ($relationship eq 'le') {
873: return ($realval<$value+$tol);
874: } elsif ($relationship eq 'ne') {
875: return (abs($value-$realval)>$tol);
876: } else {
877: return (abs($value-$realval)<$tol);
878: }
1.25 www 879: return 0;
880: }
881:
1.35 www 882: sub addlog {
883: my ($text)=@_;
884: $Apache::functionplotresponse::ruleslog.=$text.'<br />';
885: }
886:
887: sub actualval {
888: my ($i,$xmin,$xmax)=@_;
889: return $xmin+$i/400.*($xmax-$xmin);
890: }
891:
1.25 www 892: sub functionplotrulecheck {
1.33 www 893: my ($rule,$xmin,$xmax,$ymin,$ymax)=@_;
894:
1.35 www 895: my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$minimumlength,$maximumlength,$relationship,$value,$percent)
1.25 www 896: =split(/\:/,$rule);
1.33 www 897: $percent=($percent>0?$percent:5);
1.35 www 898: &addlog("=================");
1.42 www 899: &addlog("Rule $label for ".($derivative<0?'integral':('function itself','first derivative','second derivative')[$derivative])." $relationship $value");
1.30 www 900: my $li=0;
901: my $lh=400;
902:
1.31 www 903: # Special case: the upper boundary was not defined
904: # and needs to be set to the value where
905: # the condition is not true anymore => set flag
906:
907: my $findupper=0;
908: if (($xfinal eq '')
909: && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}))
910: && ($xfinallabel)) {
911: $findupper=1;
912: }
913:
1.25 www 914: # if a hard value is set for the boundaries, it overrides the label
1.30 www 915: if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) {
916: $li=&array_index($xmin,$xmax,$xinitial);
917: $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li;
918: }
919: if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) {
920: $lh=&array_index($xmin,$xmax,$xfinal);
921: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh;
1.25 www 922: }
1.31 www 923: # if the label is defined, use it
1.25 www 924: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) {
1.35 www 925: &addlog("Using lower label $xinitiallabel");
1.30 www 926: $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel};
927: } else {
928: $li=&array_index($xmin,$xmax,$xinitial);
1.25 www 929: }
1.31 www 930: unless ($findupper) {
931: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) {
1.35 www 932: &addlog("Using upper label $xfinallabel");
1.33 www 933: $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}-1;
1.31 www 934: } else {
935: $lh=&array_index($xmin,$xmax,$xfinal);
936: }
1.25 www 937: }
938: # Basic sanity checks
1.30 www 939: if ($li<0) { $li=0; }
940: if ($lh>400) { $lh=400; }
1.38 www 941: if (($li>$lh) || (!defined($lh))) {
1.30 www 942: $lh=$li;
1.25 www 943: }
1.31 www 944:
1.35 www 945: &addlog("Boundaries: x=".&actualval($li,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$li]."; index $li)) to x=".
946: &actualval($lh,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$lh]."; index $lh))");
947: if ($findupper) {
948: &addlog("Looking for label $xfinallabel");
949: }
1.33 www 950: my $tol=$percent*($ymax-$ymin)/100;
951: if ($xmax>$xmin) {
952: if ($derivative==2) {
953: $tol=4.*$tol/($xmax-$xmin);
954: } elsif ($derivative==1) {
955: $tol=2.*$tol/($xmax-$xmin);
1.42 www 956: } elsif ($derivative==-1) {
957: $tol=$tol*($xmax-$xmin)/2.;
1.33 www 958: }
1.27 www 959: }
1.42 www 960: my $integral=0;
961: my $binwidth=($xmax-$xmin)/400.;
962: if (($derivative<0) && (!$findupper)) {
963: # definite integral, calculate over whole length
964: &addlog("Calculating definite integral");
965: for (my $i=$li; $i<=$lh; $i++) {
966: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
967: }
968: unless (&compare_rel($relationship,$value,$integral,$tol)) {
969: &addlog("Actual integral ".(defined($integral)?$integral:'undef').", expected $value, tolerance $tol");
970: &addlog("Rule $label failed.");
971: my $hintlabel=$label;
972: $hintlabel=~s/^R//;
973: push(@Apache::functionplotresponse::failedrules,$hintlabel);
974: &addlog("Set hint condition $hintlabel");
975: return 0;
976: }
977: } else {
978: for (my $i=$li; $i<=$lh; $i++) {
1.25 www 979: my $val;
980: if ($derivative==2) {
1.27 www 981: $val=$Apache::functionplotresponse::d2funcdx2[$i];
1.25 www 982: } elsif ($derivative==1) {
1.27 www 983: $val=$Apache::functionplotresponse::dfuncdx[$i];
1.42 www 984: } elsif ($derivative==-1) {
985: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
986: $val=$integral;
1.25 www 987: } else {
1.27 www 988: $val=$Apache::functionplotresponse::func[$i];
1.25 www 989: }
1.31 www 990: unless (&compare_rel($relationship,$value,$val,$tol)) {
1.37 www 991: &addlog("Actual value ".(defined($val)?$val:'undef').", expected $value, tolerance $tol");
1.35 www 992: &addlog("Condition not fulfilled at x=".&actualval($i,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$i]."; index $i)");
1.31 www 993: if (($findupper) && ($i>$li)) {
1.35 www 994: # check for minimum and maximum lengths
995: my $length=&actualval($i,$xmin,$xmax)-&actualval($li,$xmin,$xmax);
996: if ($minimumlength) {
997: if ($length<$minimumlength) {
998: &addlog("Rule $label failed, actual length $length, minimum length $minimumlength");
999: return 0;
1000: }
1001: }
1002: if ($maximumlength) {
1003: if ($length>$maximumlength) {
1004: &addlog("Rule $label failed, actual length $length, maximum length $maximumlength");
1005: return 0;
1006: }
1007: }
1.31 www 1008: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i;
1.35 www 1009: &addlog("Rule $label passed, setting label $xfinallabel");
1.31 www 1010: return 1;
1011: } else {
1.35 www 1012: &addlog("Rule $label failed.");
1.37 www 1013: my $hintlabel=$label;
1014: $hintlabel=~s/^R//;
1015: push(@Apache::functionplotresponse::failedrules,$hintlabel);
1016: &addlog("Set hint condition $hintlabel");
1.31 www 1017: return 0;
1018: }
1019: }
1.42 www 1020: }
1.25 www 1021: }
1.35 www 1022: &addlog("Rule $label passed.");
1.27 www 1023: return 1;
1.24 www 1024: }
1025:
1.37 www 1026: sub start_functionplotruleset {
1027: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1028: if ($target eq 'edit') {
1029: return &Apache::edit::start_table($token).
1030: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Rule Set').'</span></td>'
1031: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1032: .&Apache::edit::deletelist($target,$token).' '.
1033: &Apache::edit::insertlist($target,$token)
1034: .'</span></td>'
1035: ."<td> "
1036: .&Apache::edit::end_row()
1037: .&Apache::edit::start_spanning_row()
1038: ."\n";
1039: }
1040: }
1.3 www 1041:
1.37 www 1042: sub end_functionplotruleset {
1043: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1044: my $id=$Apache::inputtags::response[-1];
1045: my $partid=$Apache::inputtags::part;
1046: my $internalid = $partid.'_'.$id;
1047:
1048: if ($target eq 'edit' ) {
1049: return &Apache::edit::end_table();
1050: } elsif ($target eq 'grade'
1.10 www 1051: && &Apache::response::submitted()
1052: && $Apache::lonhomework::type ne 'exam') {
1.12 www 1053: #
1054: # Actually grade
1055: #
1.41 www 1056: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1.27 www 1057:
1.24 www 1058: my $ad='';
1.30 www 1059: undef %Apache::functionplotresponse::functionplotrulelabels;
1.35 www 1060: $Apache::functionplotresponse::ruleslog='';
1.30 www 1061: $Apache::functionplotresponse::functionplotrulelabels{'start'}=400;
1062: $Apache::functionplotresponse::functionplotrulelabels{'end'}=0;
1.18 www 1063: if (&populate_arrays($internalid,$xmin,$xmax) eq 'no_func') {
1.21 www 1064: $ad='NOT_FUNCTION';
1.18 www 1065: } else {
1.35 www 1066: &addlog("Start of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'start'},$xmin,$xmax)." (index ".
1067: $Apache::functionplotresponse::functionplotrulelabels{'start'}.")");
1068: &addlog("End of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'end'},$xmin,$xmax)." (index ".
1069: $Apache::functionplotresponse::functionplotrulelabels{'end'}.")");
1070:
1.24 www 1071: # We have a function that we can actually grade, go through the spline rules.
1.25 www 1072: foreach my $rule (@Apache::functionplotresponse::functionplotrules) {
1.33 www 1073: unless (&functionplotrulecheck($rule,$xmin,$xmax,$ymin,$ymax)) {
1.24 www 1074: $ad='INCORRECT';
1075: last;
1076: }
1077: }
1078: # If it's not wrong, it's correct
1079: unless ($ad) { $ad='EXACT_ANS' };
1.18 www 1080: }
1.37 www 1081: &addlog("Set hint conditions: ".join(",",@Apache::functionplotresponse::failedrules));
1082: &addlog("Assigned award detail: $ad");
1083: # Store for later to be assigned at end_functionplotresponse
1084: $Apache::functionplotresponse::awarddetail=$ad;
1085: }
1086: }
1087:
1088:
1089: sub end_functionplotresponse {
1090: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1091: &Apache::response::end_response;
1092:
1093: my $result;
1094: my $id=$Apache::inputtags::response[-1];
1095: my $partid=$Apache::inputtags::part;
1096: my $internalid = $partid.'_'.$id;
1.20 www 1097:
1.37 www 1098: if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
1099: if ($target eq 'grade'
1100: && &Apache::response::submitted()
1101: && $Apache::lonhomework::type eq 'exam') {
1102:
1103: &Apache::response::scored_response($partid,$id);
1104:
1105: } elsif ($target eq 'grade'
1106: && &Apache::response::submitted()
1107: && $Apache::lonhomework::type ne 'exam') {
1108: my ($response,%coords)=&get_answer_from_form_fields($internalid);
1109: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
1110: my %previous=&Apache::response::check_for_previous($response,$partid,$id);
1111: #
1112: # Assign grade
1113: #
1114: my $ad=$Apache::functionplotresponse::awarddetail;
1.12 www 1115: #
1116: # Store grading info
1117: #
1118: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;
1119: &Apache::response::handle_previous(\%previous,$ad);
1.10 www 1120: } elsif ($target eq 'web') {
1.37 www 1121: undef @Apache::functionplotresponse::failedrules;
1122: }
1123: return $result;
1124: }
1125:
1126: sub end_functionplotelements {
1127: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1128: my $result='';
1129: my $id=$Apache::inputtags::response[-1];
1130: my $partid=$Apache::inputtags::part;
1131: my $internalid = $partid.'_'.$id;
1132: if ($target eq 'edit' ) {
1133: $result=&Apache::edit::end_table();
1134: } elsif ($target eq 'web') {
1.6 www 1135: # Now is the time to render all of the stored splines
1.41 www 1136: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1.6 www 1137: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
1.40 www 1138: $result.=&generate_spline($internalid,$label,$xmin,$xmax,$ymin,$ymax);
1.6 www 1139: }
1.5 www 1140: # close the init script
1.3 www 1141: $result.=&end_init_script();
1.17 www 1142: # register all splines in this response
1143: $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'.
1144: join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n";
1145: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
1146: $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'.
1147: $Apache::functionplotresponse::splineorder{$label}.'" />'."\n";
1148: }
1.9 www 1149: # generate the input fields
1150: $result.=$Apache::functionplotresponse::inputfields;
1.5 www 1151: # actually start the <applet>-tag
1.3 www 1152: $result.=&geogebra_startcode($internalid);
1.5 www 1153: # load the spline bytecode
1.3 www 1154: $result.=&geogebra_spline_program();
1.5 www 1155: # set default parameters
1.3 www 1156: $result.=&geogebra_default_parameters($internalid);
1.5 www 1157: # close the <applet>-tag
1.1 www 1158: $result.=&geogebra_endcode();
1159: }
1160: return $result;
1161: }
1162:
1.41 www 1163: sub boundaries {
1164: my ($parstack,$safeeval,$level)=@_;
1165: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,$level);
1166: $xmin=(defined($xmin)?$xmin:-10);
1167: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,$level);
1168: $xmax=(defined($xmax)?$xmax:10);
1169: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,$level);
1170: $ymin=(defined($ymin)?$ymin:-10);
1171: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,$level);
1172: $ymax=(defined($ymax)?$ymax:10);
1173: if ($xmax<=$xmin) {
1174: $xmax=$xmin+20;
1175: }
1176: if ($ymax<=$ymin) {
1177: $ymax=$ymin+20;
1178: }
1179: return ($xmin,$xmax,$ymin,$ymax);
1180: }
1181:
1.37 www 1182: sub start_functionplotelements {
1183: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1184: my $result='';
1185: my $id=$Apache::inputtags::response[-1];
1186: my $partid=$Apache::inputtags::part;
1187: my $internalid = $partid.'_'.$id;
1188:
1189: if ($target eq 'edit') {
1190: return &Apache::edit::start_table($token).
1191: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Elements').'</span></td>'
1192: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1193: .&Apache::edit::deletelist($target,$token).' '.
1194: &Apache::edit::insertlist($target,$token)
1195: .'</span></td>'
1196: ."<td> "
1197: .&Apache::edit::end_row()
1198: .&Apache::edit::start_spanning_row()
1199: ."\n";
1200: } elsif ($target eq 'web') {
1.41 www 1201: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1.37 www 1202: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1203: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1204: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1205: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval,-2);
1206: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval,-2);
1207:
1208:
1209: # paste in the update routine to receive stuff back from the applet
1210: $result.=&update_script($internalid);
1211: # start the initscript for this applet
1212: $result.=&start_init_script($internalid);
1213: # put the axis commands inside
1214: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible);
1215: $result.=&axes_label($internalid,$xlabel,$ylabel);
1216: # init script is left open
1217: }
1218: return $result;
1219: }
1220:
1.1 www 1221: 1;
1222:
1223: __END__
1224:
1225: =head1 NAME
1226:
1227: Apache::functionplotresponse.pm;
1228:
1229: =head1 SYNOPSIS
1230:
1231: Handles tags associated with accepting function plots.
1232:
1233: This is part of the LearningOnline Network with CAPA project
1234: described at http://www.lon-capa.org.
1235:
1236: =head1 HANDLER SUBROUTINE
1237:
1238: start_functionplotresponse()
1239:
1240: =head1 OTHER SUBROUTINES
1241:
1242: =over
1243:
1244: =item end_functionplotresponse()
1245:
1246: =back
1247:
1248: =cut
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