{
    "env": [
		{
			"MY_BROWSER_PATH" : "C:/Program Files/Google/Chrome/Application/chrome.exe"
		},
        {
			"HOUDINI_EXTERNAL_HELP_BROWSER" : "$MY_BROWSER_PATH"
		}
	]
}

{
    "env": [
		{
			"MY_BROWSER_PATH" : "C:/Program Files/Google/Chrome/Application/chrome.exe"
		},
        {
			"HOUDINI_EXTERNAL_HELP_BROWSER" : 
				{
					"houdini_version == $SOME_VAR " :"$MY_BROWSER_PATH"
				}
		}
	]
}

#bind layer bg_normal? float4 val={0.5,0.5,1,1}
#bind layer fg_normal? float4 val={0.5,0.5,1,1}

node = hou.pwd()
node.setUserData('nodeshape', 'circle')

{
  "env": [
    {
      "HOUDINI_EXTERNAL_HELP_BROWSER" : "/path/to/browser.exe"
    }
  ]
}

i[]@intersectionList = array();
for (int pt = 0; pt < @numpt; pt++)
{
    int nc = neighbourcount(0, pt);
    int intersectionid = nc > 2;
    setpointattrib(0, "nc", pt, nc);
    setpointattrib(0, "intersectionid", pt, intersectionid);
    if (intersectionid)
    {
        append(i[]@intersectionList, pt);
    }
}

i@ptid = @ptnum;
int nc = neighbourcount(0, @ptnum);
i@nc = nc;
i@intersectionid = nc > 2;

i[]@intersectionList = array();
for (int pt = 0; pt < @numpt; pt++)
{
    int intersectionid = point(0, "intersectionid", pt);
    if (intersectionid)
    {
        append(i[]@intersectionList, pt);
    }
}

int intersectionList[] = array();

i[]@il = intersectionList;

// get current pos attrib value
float pos = detail(0, "pos");

// initialize offset value to add to pos attrib
// when "if" statement is not satisfied then offset is 0 and will not affect pos attrib value
float offset = 0;

// sin function values are always between -1 and 1
// enter "if" statement only when sin value is between 0 and 1
float signal = sin(@Time * chf('speed'));
if (signal >= 0) {
    offset = chf('units') * signal;
}

setdetailattrib(0, "pos", pos + offset, "set");