complex attributes

[capriccio]

hi there - i'm new to this board and zen cart, so be gentle with this question. ;-) after looking through the faqs, manual and forum, i think i might be out of luck with what i'm trying to do. but i'm hoping you'll tell me otherwise. the product: custom size doors. basically, i want to create two free-form (text field) attributes: height and width. i want to be able to apply price factors based on each individually as well as the product of height * width. i'll throw out the formulas to make it clearer:

total price of door = [door price] + [calc'd shipping] + [flat shipping]
door price = base price * square footage if greater than base size; otherwise, door price = base price / 2 * (base size + size desired) if less than base size. all doors may have different base sizes and prices.

calc'd shipping = (height + offset) + (width + offset) * variable shipping rate factor

flat shipping = $100

so - i need the user to supply both height and width individually, but in determining the price, both values are needed at once. so, a few questions here: is there any way to reference the value of another attribute or itself when defining the price offsets and factors?

or suppose i were to code in a small calculator that would do this work, is there any way to pass these custom values to zen cart before it's added to the cart as a hidden form value or something?

thanks much everyone.

[kuroi]

There is no built-in way to achieve this. It would involve customer coding. I know a designer who I think did something similar, and will contact him to see if he's got time to drop by.

[Ryk]

Try http://www.thatsoftwareguy.com/swguy...roducts_id=180 for some commercial help.

[capriccio]

kuroi - kind of what i thought. and i think i'll get a start on hacking the code to make it do what i want. it's a bit daunting though, the codebase being as large and complex as it is.

i'll try to post my patches here when i'm done. i figure i'm not the only one that needs something like this in zen cart.

thanks much for your replies.