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BackFFG1158 FFV1158 Virtex-7 BGA, 44x44 grid, 45x45mm package, 1mm pitch; https://www.xilinx.com/support/documentation/user_guides/ug475_7Series_Pkg_Pinout.pdf#page=275, NSMD pad.
- -0.866134 -0.000277976 facet normal -0.0635194 0.807211.
- Light-direction downwards, see http://www.kodenshi.co.jp/products/pdf/sensor/photointerrupter_ref/SG-105.pdf package for Everlight.
- Normal -8.706134e-01 -4.919677e-01 3.074473e-04 facet normal -0.288281 0.956957.