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second: fix off-by-one error in box/vlin drawing
This commit is contained in:
Vince Weaver
parent
fb33832144
commit
e3769421bb
@ -8,7 +8,7 @@
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; BOX x1,y1 to x2,y2
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; CLEAR -
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num_scenes=5
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num_scenes=8
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frame15:
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.byte SET_COLOR | BLACK
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@ -26,6 +26,19 @@ frame15:
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; .byte SET_COLOR | DARK_BLUE
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; .byte HLIN,0,39,13
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; .byte SET_COLOR | GREEN
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; .byte BOX, 2,2,3,3 ; goes to 6 only top
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; .byte BOX, 4,3,5,4
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; .byte BOX, 6,4,7,5
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; .byte BOX, 8,5,9,6
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; .byte SET_COLOR | GREEN
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; .byte VLIN, 2,3,2 ; goes to 6 only top
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; .byte VLIN, 3,4,4
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; .byte VLIN, 4,5,6
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; .byte VLIN, 5,6,8
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; .byte SET_COLOR | GREEN
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; .byte BOX, 2,2,10,12 ; goes to 6 only top
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; .byte BOX, 12,3,20,12
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@ -126,3 +139,98 @@ frame19:
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.byte HLIN, 30, 35, 28
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.byte VLIN, 21, 26, 28
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.byte END
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frame20:
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.byte SET_COLOR | BLACK
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.byte CLEAR
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.byte SET_COLOR | BROWN
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.byte BOX, 4, 6, 35,41
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.byte SET_COLOR | MEDIUM_BLUE
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.byte BOX, 18, 9, 21, 17
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.byte BOX, 26, 10, 29, 17
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.byte BOX, 34, 10, 35, 17
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.byte BOX, 18, 26, 21, 33
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.byte BOX, 25, 26, 29, 33
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.byte BOX, 34, 30, 35, 34
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.byte SET_COLOR | LIGHT_BLUE
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.byte BOX, 31, 21, 35, 27
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.byte HLIN, 32, 35, 20
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.byte HLIN, 34, 35, 29
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.byte SET_COLOR | GREY1
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.byte BOX, 34, 22, 35, 28
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.byte HLIN, 32, 35, 24
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.byte HLIN, 4,6,39
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.byte HLIN, 4,19,40
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.byte HLIN, 4,29,41
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.byte SET_COLOR | RED
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.byte HLIN, 34, 35, 26
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.byte SET_COLOR | ORANGE
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.byte PLOT, 33, 25
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.byte END
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frame21:
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.byte SET_COLOR | BLACK
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.byte CLEAR
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.byte SET_COLOR | BROWN
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.byte BOX, 4, 6, 35, 41
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.byte SET_COLOR | MEDIUM_BLUE
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.byte BOX, 7, 7, 11, 16
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.byte BOX, 16, 8, 20, 16
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.byte BOX, 25, 9, 28, 17
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.byte BOX, 33, 9, 35, 17
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.byte BOX, 7, 25, 11, 34
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.byte BOX, 16,26, 20, 34
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.byte BOX, 25,26, 28, 34
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.byte BOX, 33,28, 35, 33
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.byte SET_COLOR | GREY1
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.byte BOX, 32,20,35,21
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.byte SET_COLOR | LIGHT_BLUE
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.byte BOX, 31, 22, 35,26
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.byte HLIN, 33, 35, 21
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.byte HLIN, 32, 35, 27
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.byte SET_COLOR | GREY1
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.byte BOX, 33,23,35,24
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.byte SET_COLOR | ORANGE
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.byte VLIN, 24,26,35
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.byte END
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frame22:
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.byte SET_COLOR | BLACK
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.byte CLEAR
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.byte SET_COLOR | GREY1
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.byte BOX, 4,6,31,41
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.byte SET_COLOR | BROWN
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.byte BOX, 32, 6, 35, 32
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.byte SET_COLOR | MEDIUM_BLUE
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.byte BOX, 4, 6, 5, 14
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.byte BOX, 12, 7, 15, 15
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.byte BOX, 20, 8, 23, 16
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.byte BOX, 4, 25, 5, 35
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.byte BOX, 11,25, 15, 34
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.byte BOX, 20,25, 22, 33
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.byte SET_COLOR | GREY1
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.byte BOX, 32,22,35,25
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.byte BOX, 32,32,33,41
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.byte BOX, 34,33,35,41
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.byte SET_COLOR | LIGHT_BLUE
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.byte BOX, 30,20,33,21
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.byte HLIN, 30,31,19
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.byte BOX, 30,24,31,26
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.byte PLOT, 32,25
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.byte SET_COLOR | ORANGE
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.byte HLIN, 33,34,24
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.byte PLOT, 33,23
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.byte SET_COLOR | DARK_BLUE
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.byte VLIN, 19,26,29
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.byte HLIN, 30,32,22
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.byte HLIN, 30,31,23
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.byte SET_COLOR | LIGHT_BLUE
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.byte PLOT, 31,22
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.byte SET_COLOR | BLACK
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.byte BOX, 31,34, 33,35
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.byte BOX, 32,35, 35,36
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.byte HLIN, 34,35,37
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.byte END
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@ -16,6 +16,7 @@ CLEAR = $01
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BOX = $02
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HLIN = $03
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VLIN = $04
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PLOT = $05
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BLACK = $00
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RED = $01
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@ -111,6 +112,17 @@ clear_screen:
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; draw box
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;=================================
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;=================================
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; blurgh. Cases
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; Y1=EVEN, Y2=ODD -> loop Y1/2 to Y2/2, inclusive
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; Y1=ODD, Y2=ODD -> HLIN, loop (Y1/2)+1 to Y2/2 inclusive
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; Y1=EVEN, Y2=EVEN-> loop Y1/2 to (Y2/2)-1, HLIN
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; Y1=ODD, Y2=EVEN -> HLIN, loop (Y1/2)+1 to (Y2/2)-1, HLIN
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; 2/3 case, 1 to 1
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; 3/5 case, (>1) 2 to 2
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; 2/4 case, 1 to 1 (<2)
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; 3/4 case, 2 to 1 (!)
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; 3/6 case, 2 to 2
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draw_box:
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iny
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lda (INL),Y
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@ -154,6 +166,14 @@ odd_bottom_draw_box:
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even_draw_box_start:
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draw_box_yloop:
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draw_box_yend_smc:
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cpy #0
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bcc bbbb
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beq bbbb
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jmp done_draw_box_yloop ; bge
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bbbb:
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lda gr_offsets_l,Y
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sta draw_box_xloop_smc+1
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@ -172,11 +192,14 @@ draw_box_xloop_smc:
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bcs draw_box_xloop ; bge
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iny
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draw_box_yend_smc:
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cpy #0
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bcc draw_box_yloop ; less than
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beq draw_box_yloop ; equal
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;draw_box_yend_smc:
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; cpy #0
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; bcc draw_box_yloop ; less than
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; beq draw_box_yloop ; equal
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jmp draw_box_yloop
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done_draw_box_yloop:
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; done
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; if Y2 was even we need to fixup and draw one more line
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@ -272,6 +295,14 @@ odd_bottom_vlin:
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even_vlin_start:
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vlin_yloop:
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vlin_yend_smc:
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cpy #0
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bcc cccc
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beq cccc
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jmp done_vlin_yloop ;
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cccc:
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lda gr_offsets_l,Y
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sta vlin_xloop_smc+1
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@ -287,12 +318,15 @@ vlin_xloop_smc:
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sta $400,X
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iny
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vlin_yend_smc:
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cpy #0
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bcc vlin_yloop ; less than
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beq vlin_yloop ; equal
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;vlin_yend_smc:
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; cpy #0
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; bcc vlin_yloop ; less than
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; beq vlin_yloop ; equal
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jmp vlin_yloop
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; done
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done_vlin_yloop:
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; if Y2 was even we need to fixup and draw one more line
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