alice-teacher Object checking opacity of a vehicle

[Findley, Scott]

Question from a student who is trying to figure out a way to have an object check the opacity of a current object vehicle. Any suggestions?

I have a problem. I have 5 helicopters in my alice program and I have a missile attached to each (their vehicle is set to one of the helecopters). I have all of my misiles in a list and I want to be able to treat the current object's vehicle in a for all in order list as a regular object (Ideally setting a variable to item_from_missile_list.vehicle) and then I want to be able to check the vehicle's opacity (I want to do this so I can check whether or not the helicopter is visible or "alive" and perform an action accordingly). However, Alice won't let me drop the item_from_missile_list.vehicle into an opacity function (ie opacity = randomObject.opacity), and I'm not really sure why its doing this. Do any of you have any idea why this is, how to fix it or any potential workarounds?

Mr. Scott Findley
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