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Update act2model.json #1

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114 changes: 85 additions & 29 deletions src/interactives/interactions/act2model.json
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Original file line number Diff line number Diff line change
@@ -1,8 +1,14 @@
{
"title": "Visualizing Electric Fields and Forces",
"publicationStatus": "public",
"labEnvironment": "production",
"subtitle": "Explore how electric fields relate to forces on charged objects.",
"category": "",
"subCategory": "",
"screenshot": "",
"aspectRatio": 1.18,
"fontScale": 1,
"helpOnLoad": false,
"about": [
"Control the polarity of the stationary charged object and observe how the charge affects the electric field around it.",
"Add a second charged object and move it around the stationary object.",
Expand All @@ -14,70 +20,127 @@
"id": "act2model$0",
"url": "models-converted/lab-version/1/md2d/interactions/distance-and-force/act2model$0.json",
"importedFrom": "imports/legacy-mw-content/interactions/distance-and-force/act2model$0.mml",
"onLoad": [
"setAtomProperties(0,{charge: 2});",
"set('showElectricField',true);"
],
"viewOptions": {
"controlButtons": "",
"electricFieldDensity": 24,
"electricFieldColor": "rgb(0,255,0)",
"forceVectors": {
"length": 9
}
},
"onLoad": [
"setAtomProperties(0,{charge: 2});",
"set('showElectricField',true);"
]
}
}
],
"propertiesToRetain": [],
"parameters": [
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This is the section where parameters are defined. Only name and initialValue are required. Here is where you could define parameters to store the position of the second atom.

You use get('parameter-name') and set('parameter-name', value) to work with them. Here is an example of an interactive that uses a lot of parameters: http://lab.concord.org/interactives.html#interactives/inquiry-space/1-pendulum.json

{
{
"name": "show-second-atom",
"initialValue": false,
"onChange": [
"if (value) {",
" setAtomProperties(1, {charge: 2, visible: true});",
"} else {",
" setAtomProperties(1, {charge: 0, visible: false});",
" addAtom({ element:2,",
" x: getAtomProperties(0).vx,",
" y: getAtomProperties(0).vy,",
" charge:2,",
" vx: 0,",
" vy: 0});",
"} else {","setAtomProperties(0,{vx:getAtomProperties(1).x , vy:getAtomProperties(1).y});",

" removeAtom(1);",
"}"
]
}
],
"outputs": [],
"filteredOutputs": [],
"helpTips": [],
"hideExportDataControl": false,
"dataSets": [],
"components": [
{
"type": "checkbox",
"id": "select-show-forces",
"type": "checkbox",
"text": "Show forces",
"textOn": "right",
"width": "auto",
"height": "auto",
"property": "showForceVectors",
"text": "Show forces"
"retainProperty": true,
"disabled": false,
"tooltip": ""
},
{
"type": "checkbox",
"id": "select-show-electric-field",
"type": "checkbox",
"text": "Show electric field",
"textOn": "right",
"width": "auto",
"height": "auto",
"property": "showElectricField",
"text": "Show electric field"
"retainProperty": true,
"disabled": false,
"tooltip": ""
},
{
"type": "checkbox",
"id": "select-show-second-atom",
"type": "checkbox",
"text": "Show second object",
"textOn": "right",
"width": "auto",
"height": "auto",
"property": "show-second-atom",
"text": "Show second object"
"retainProperty": true,
"disabled": false,
"tooltip": ""
},
{
"type": "text",
"id": "label-set-charge",
"text": "Change the charge on the **center object**"
"type": "text",
"text": "Change the charge on the **center object**",
"width": "auto",
"height": "auto",
"tooltip": ""
},
{
"type": "button",
"id": "set-charge-negative",
"type": "button",
"action": "setAtomProperties(0,{charge: -2});",
"text": "Negative (-)"
"text": "Negative (-)",
"width": "",
"height": "",
"disabled": false,
"tooltip": ""
},
{
"type": "button",
"id": "set-charge-positive",
"type": "button",
"action": "setAtomProperties(0,{charge: 2});",
"text": "Positive (+)"
"text": "Positive (+)",
"width": "",
"height": "",
"disabled": false,
"tooltip": ""
}
],
"layout": {
"bottom": [
[
"label-set-charge"
],
[
"set-charge-negative",
"set-charge-positive"
],
[
"select-show-second-atom",
"select-show-electric-field",
"select-show-forces"
]
]
},
"template": [
{
"id": "bottom",
Expand All @@ -86,12 +149,5 @@
"width": "model.width",
"align": "center"
}
],
"layout": {
"bottom": [
["label-set-charge"],
["set-charge-negative","set-charge-positive"],
["select-show-second-atom","select-show-electric-field","select-show-forces"]
]
}
]
}