ATTENTION

• Open the Flowitem Bin and create a label on the Textured Colored Box called weight.

• Open the Queue’s Properties window, and create two labels, called maxweight and currentweight respectively.

• Open the Source’s Parameters window, click the SourceTriggers tab, and add a function to the OnCreation trigger using the Set Label option. Edit the blue text to read as follows:

Object: item
Label: “weight”
Value: uniform(5,10)
Click OK

• Open the Conveyor’s Parameters window, click the Triggers tab, and create a function on the OnConveyEnd by clicking the A| button. Enter the following code:

/**weight*/
treenodeitem = parnode(1);
treenodecurrent = ownerobject(c);

//these variable make the mathematical expression easier
double maxweight = getlabelnum(outobject(current,1), "maxweight");
double currentweight = getlabelnum(outobject(current,1),"currentweight");
double itemweight = getlabelnum(item, "weight");

//if the item's weight makes the total weight go over 100
if((maxweight-currentweight)<itemweight)
{
//close the ports because the item weighs too much
closeinput(outobject(current, 1));
}
else
{
//keep the ports open because the item will fit
openinput(outobject(current, 1));
}

Click OK on the Code Edit window, and the Parameters window.

• Open the Queue’s Parameters window and click the QueueTriggers tab. Add a function to the OnReset trigger using the Set Label option. Edit the blue text to read as follows:

Object: current
Label: “currentweight”
Value: 0

• Next, add a function to the OnEntry trigger using the Increment Value option. Edit the blue text to read as follows:

Node: label(current, “currentweight”)
Increment By: getlabelnum(item, “weight”)

• Next, add a function to the OnExit trigger using the Increment Value option. Edit the blue text to read as follows:

Node: label(current, “currentweight”)
Increment By: -1*getlabelnum(item, “weight”)

• Next, add another function to the OnExit trigger using the Send Message option. Edit the blue text to read as follows:

Delay Time: 0
To: current
From: current
Param1: 0
Param2: 0
Param3: 0
Condition: getlabelnum(current,&quot;currentweight&quot<90)

• Next, add a function to the OnMessage trigger using the Close and Open Ports option. Edit the blue text to read as follows:

Condition: 1
Action: openinput
Object: current
Click OK to close the Parameters window

• Open the Visual Tool’s Parameters window. Select Text from the Visual Display list, then Select Display Label Value from the Text Display list. Edit the blue text to read as follows:

Text: “Current Weight: “
Object: centerobject(current,1)
Label: “currentweight”