+ ,(string->symbol (format "N-row-~s" row))))))
+
+(define (column-traces col)
+ (let* ([xo (* col spacing)]
+ [yo (- (list-ref column-offsets col) 8)])
+ (for/list ([coords '[[36.46 22.92 34.23 22.92]
+ [33.02 24.13 33.02 26.67]
+ [34.23 22.92 33.02 24.13]
+ [35.19 44.46 31.75 44.46]
+ [31.75 44.46 31.75 44.45]
+ [31.75 41.91 36.45 41.91]
+ [36.45 41.91 35.19 43.17]
+ [35.19 43.17 35.19 44.46]
+ [36.46 79.92 36.46 81.19]
+ [36.46 81.19 35.19 82.46]
+ [31.75 60.96 36.42 60.96]
+ [36.42 60.96 36.83 60.55]
+ [36.83 60.55 36.83 59.69]
+ [31.75 63.50 35.15 63.50]
+ [35.15 63.50 36.46 62.19]
+ [36.46 62.19 36.46 60.92]
+ [31.75 79.02 35.56 79.02]
+ [35.56 79.02 36.46 79.92]
+ [36.46 22.92 36.46 24.19]
+ [36.46 24.19 35.25 25.40]
+ [35.25 25.40 34.29 25.40]
+ [34.29 25.40 33.02 26.67]
+ [33.02 26.67 31.75 27.94]
+ [31.75 27.94 31.75 41.91]
+ [31.75 41.91 31.75 44.45]
+ [31.75 44.45 31.75 60.96]
+ [31.75 60.96 31.75 63.50]
+ [31.75 63.50 31.75 79.02]
+ [31.75 79.02 35.19 82.46]]])
+ (match coords
+ [(list xs ys xe ye) `(segment (start ,(+ xo xs) ,(+ yo ys))
+ (end ,(+ xo xe) ,(+ yo ye))
+ (width 0.2032) (layer Front)
+ (net ,(+ col 5)))]))))
+(define (row-traces row)
+ (let* ([yo (+ (* rows spacing -1) (* (add1 row) spacing))]
+ [row3 '[[127.65 58.89 127.65 62.88] ; extra bits for the middle keys
+ [127.00 95.25 125.73 93.98]
+ [140.97 95.25 127.00 95.25]
+ [140.97 68.58 140.97 95.25]
+ [138.43 66.04 140.97 68.58]
+ [130.81 66.04 138.43 66.04]
+ [127.65 62.88 130.81 66.04]
+ [125.73 93.98 125.73 90.17]
+ [123.19 93.98 125.73 93.98]
+ [121.02 91.81 123.19 93.98]
+ [124.09 91.81 125.73 90.17]
+ [125.73 90.17 127.00 88.90]
+ [127.00 87.19 130.19 84.00]
+ [127.00 88.90 127.00 87.19]]]
+ [all-rows '[[102.87 86.81 102.87 87.63]
+ [104.14 88.90 105.41 88.90]
+ [102.87 87.63 104.14 88.90]
+ [120.65 91.81 121.02 91.81]
+ [105.00 86.81 105.00 88.49]
+ [105.00 88.49 105.41 88.90]
+ [108.32 91.81 120.65 91.81]
+ [105.41 88.90 108.32 91.81]
+ [120.65 91.81 124.09 91.81]
+ [69.850 85.81 69.130 85.81]
+ [67.310 87.63 65.200 87.63]
+ [69.130 85.81 67.310 87.63]
+ [84.040 82.77 87.630 82.77]
+ [67.000 85.81 69.850 85.81]
+ [69.850 85.81 81.000 85.81]
+ [81.000 85.81 84.040 82.77]
+ [84.040 82.77 86.000 80.81]
+ [48.000 88.81 64.000 88.81]
+ [72.000 80.81 86.000 80.81]
+ [64.000 88.81 72.000 80.81]
+ [86.000 80.81 87.630 82.44]
+ [87.630 82.44 87.630 82.77]
+ [87.630 82.77 87.630 85.09]
+ [89.350 86.81 101.60 86.81]
+ [87.630 85.09 89.350 86.81]
+ [101.60 86.81 102.87 86.81]
+ [102.87 86.81 104.59 86.81]]])
+ (for/list ([coords (if (= row 3) (append row3 all-rows) all-rows)])
+ (match coords
+ [(list xs ys xe ye) `(segment (start ,xs ,(+ yo ys))
+ (end ,xe ,(+ yo ye))
+ (width 0.2032) (layer Back)
+ (net ,(+ row 1)))]))))
+
+(define (diode-traces row col)
+ (let* ([xo (* col spacing)]
+ [yo (+ (list-ref column-offsets col) -8 (* row spacing))])
+ (for/list ([coords '[[48.00 24.19 48.00 23.87]
+ [48.00 23.87 47.05 22.92]
+ [47.05 22.92 41.54 22.92]
+ [41.54 22.92 42.81 24.19]
+ [42.81 24.19 42.81 25.46]
+ [42.81 25.46 44.08 24.19]
+ [44.08 24.19 48.00 24.19]]])
+ (match coords
+ [(list xs ys xe ye) `(segment (start ,(+ xo xs) ,(+ yo ys))
+ (end ,(+ xo xe) ,(+ yo ye))
+ (width 0.2032) (layer Back)
+ (net ,(+ row (* col 4) 11)))]))))