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https://github.com/A2osX/A2osX.git
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61 lines
1.7 KiB
Plaintext
61 lines
1.7 KiB
Plaintext
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PR#3
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NEW
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1000 GR
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1010 COLOR = 12 : X1% = 3 : Y1% = 0 : X2% = 39 : Y2% = 17
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1020 GOSUB 2000
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1030 COLOR = 13 : X1% = 2 : Y1% = 1 : X2% = 39 : Y2% = 32
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1040 GOSUB 2000
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1050 COLOR = 14 : X1% = 1 : Y1% = 2 : X2% = 29 : Y2% = 39
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1060 GOSUB 2000
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1070 COLOR = 15 : X1% = 0 : Y1% = 3 : X2% = 15 : Y2% = 39
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1080 GOSUB 2000
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1110 COLOR = 8 : X1% = 36 : Y1% = 0 : X2% = 0 : Y2% = 17
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1120 GOSUB 2000
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1130 COLOR = 9 : X1% = 37 : Y1% = 1 : X2% = 0 : Y2% = 32
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1140 GOSUB 2000
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1150 COLOR = 10 : X1% = 38 : Y1% = 2 : X2% = 26 : Y2% = 39
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1160 GOSUB 2000
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1170 COLOR = 11 : X1% = 39 : Y1% = 3 : X2% = 33 : Y2% = 39
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1180 GOSUB 2000
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1999 END
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2000 VTAB 21 : PRINT "X1=";X1%;" Y1=";Y1%;" X2=";X2%;" Y2=";Y2%
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2010 DX% = X2% - X1%
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2020 IF DX% = 0 Then VLIN Y1%,Y2% At X1% : RETURN
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2030 IF DX% < 0 Then T% = X1% : X1% = X2% : X2% = T% : T% = Y1% : Y1% = Y2% : Y2% = T% : DX% = -DX%
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2040 DY% = Y2% - Y1%
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2050 IF DY% = 0 Then HLIN X1%,X2% At Y1% : RETURN
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2060 IF DY% < 0 Then IY% = -1 : DY% = - DY% : GOTO 2100
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2070 IY% = 1
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2100 PLOT X1%,Y1%
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2110 IF DX% > DY% GOTO 3000
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2120 IF DX% < DY% GOTO 4000
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2200 IF X1% = X2% THEN RETURN
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2210 X1% = X1% + 1
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2220 Y1% = Y1% + IY%
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2230 PLOT X1%,Y1%
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2240 GOTO 2200
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3000 IE% = 2 * DY% : D% = IE% - DX% : INE% = 2 * (DY% - DX%)
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3010 IF X1% = X2% THEN RETURN
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3020 IF D% > 0 THEN D% = D% + INE% : Y1% = Y1% + IY% : GOTO 3040
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3030 D% = D% + IE%
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3040 X1% = X1% + 1
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3050 PLOT X1%,Y1%
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3060 GOTO 3010
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4000 IE% = 2 * DX% : D% = IE% - DY% : INE% = 2 * (DX% - DY%)
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4010 IF Y1% = Y2% THEN RETURN
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4020 IF D% > 0 THEN D% = D% + INE% : X1% = X1% + 1 : GOTO 4040
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4030 D% = D% + IE%
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4040 Y1% = Y1% + IY%
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4050 PLOT X1%,Y1%
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4060 GOTO 4010
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