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twister: more lores optimization

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This commit is contained in:
Vince Weaver 2023-12-07 00:28:57 -05:00
parent 60ffe8b76e
commit a52d1ebb47
1 changed files with 9 additions and 8 deletions
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17
graphics/gr/twister/lores.bas
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@ -4,17 +4,18 @@
30 FOR A2 = 1 TO 360 STEP 3 30 FOR A2 = 1 TO 360 STEP 3
40 AM = 120+COS(A2*0.0174533)*100 40 AM = 120+COS(A2*0.0174533)*100
50 AN = -3.141593+SIN(A2*0.0174533)*3.141593 50 AN = -3.141593+SIN(A2*0.0174533)*3.141593
60 FOR Y = 1 TO 39 60 FOR Y = 1 TO 39 STEP 2
65 FV = Y*4/AM+AN 65 FV = Y*4/AM+AN
70 X1 = 5*SIN(FV) 70 X1 = 8*SIN(FV)
80 X2 = 5*SIN(FV+1.570796) 80 X2 = 8*SIN(FV+1.570796)
95 X3 = -X1 95 X3 = -X1
105 X4 = -X2 105 X4 = -X2
108 COLOR = 0: HLIN 105/7,175/7 AT Y 108 COLOR = 0: HLIN 10,30 AT Y
110 IF X1 < X2 THEN COLOR = 1: HLIN 20+X1,20+X2 AT Y: GOTO 130 109 COLOR = 1
120 IF X3 < X4 THEN COLOR = 1: HLIN 20+X3,20+X4 AT Y 110 IF X1 < X2 THEN HLIN 20+X1,20+X2 AT Y: GOTO 130
130 IF X2 < X3 THEN COLOR = 2: HLIN 20+X2,20+X3 AT Y: GOTO 150 120 IF X3 < X4 THEN HLIN 20+X3,20+X4 AT Y
140 IF X4 < X1 THEN COLOR = 2: HLIN 20+X4,20+X1 AT Y 130 COLOR = 2 : IF X2 < X3 THEN HLIN 20+X2,20+X3 AT Y: GOTO 150
140 IF X4 < X1 THEN HLIN 20+X4,20+X1 AT Y
150 NEXT Y 150 NEXT Y
160 NEXT A2 160 NEXT A2
170 GOTO 30 170 GOTO 30