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[EnergyPlus_Support] How to determine the "upper-left" corner of a horizontal surface?
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- Subject: [EnergyPlus_Support] How to determine the "upper-left" corner of a horizontal surface?
- From: "Steven (Xing) Shi" <SX99A@xxxxxxxxx>
- Date: Wed, 22 Jul 2009 07:28:06 -0000
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- Delivery-date: Wed, 22 Jul 2009 01:28:46 -0600
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When using "surface" to create a building model, EP requires the input of the coordinates of each corner. The rule is such that you start from the "upper-left" corner and proceed counter-clockwise. For vertical surfaces like walls, you determine the upper-left corner by standing in front of the surface and look "into" the zone. This way, the "upper-left" corner is clearly defined.
However, I am a little confused by using this rule on a horizonal surface, say a roof or a slab. Just looking "into" the zone is not enough to determine the "upper-left" corner because you can rotate to North, South, East, or West.
I would surely appreciate if you can kindly answer my question.
Have a good day!
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