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fireworks: first pass

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This commit is contained in:
Vince Weaver 2018-09-05 23:04:25 -04:00
parent a792eda7e8
commit 803591a93c
1 changed files with 135 additions and 17 deletions
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152
fireworks/fw.s
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@ -8,12 +8,13 @@ XSIZE = 280
MARGIN = 24
; Zero page addresses
OFFSET = $EF
COLOR_GROUP = $F0
X_VELOCITY = $F1
Y_VELOCITY_H = $F2
Y_VELOCITY_L = $F3
MAX_STEPS = $F4
;XPOS_H = $F5
XPOS_H = $F5
XPOS_L = $F6
YPOS_H = $F7
YPOS_L = $F8
@ -328,13 +329,21 @@ explosion_loop:
; Draw spreading dots in white
cpy #9
bcc explosion_erase
beq explosion_erase
; hcolor_equals(color_group+3);
lda COLOR_GROUP
clc
adc #$3
tax
lda COLORTBL,X ; get color from table
sta HGR_COLOR
ldx TEMPY
stx OFFSET
jsr explosion
; if (i<9) {
; o=i;
; hcolor_equals(color_group+3);
; routine_370();
; }
explosion_erase:
;======================
; erase old
@ -345,7 +354,9 @@ explosion_erase:
lda COLORTBL,X ; get color from table
sta HGR_COLOR
; o=i-1;
ldx TEMPY
dex
stx OFFSET
jsr explosion
@ -356,7 +367,7 @@ done_with_explosion:
inc TEMPY
lda TEMPY
cmp #9
cmp #10
bne explosion_loop
;==================================
@ -377,17 +388,124 @@ done_fireworks:
explosion:
; hplot(xpos+o,ypos_h+o); // NE
; hplot(xpos-o,ypos_h-o); // SW
; HPLOT X,Y: X= (y,x), Y=a
; hplot(xpos+o,ypos_h-o); // SE
; hplot(xpos-o,ypos_h+o); // NW
clc
lda XPOS_L
adc OFFSET
tax
ldy #0
; hplot(xpos,ypos_h+(o*1.5)); // N
; hplot(xpos+(o*1.5),ypos_h); // E
clc
lda YPOS_H
adc OFFSET
; hplot(xpos,ypos_h-(o*1.5)); // S
; hplot(xpos-(o*1.5),ypos_h); // W
jsr HPLOT0 ; hplot(xpos+o,ypos_h+o); SE
clc
lda XPOS_L
adc OFFSET
tax
ldy #0
sec
lda YPOS_H
sbc OFFSET
jsr HPLOT0 ; hplot(xpos+o,ypos_h-o); NE
sec
lda XPOS_L
sbc OFFSET
tax
ldy #0
sec
lda YPOS_H
sbc OFFSET
jsr HPLOT0 ; hplot(xpos-o,ypos_h-o); NW
sec
lda XPOS_L
sbc OFFSET
tax
ldy #0
clc
lda YPOS_H
adc OFFSET
jsr HPLOT0 ; hplot(xpos-o,ypos_h+o); SW
; HPLOT X,Y: X= (y,x), Y=a
ldx XPOS_L
ldy #0
clc
lda OFFSET
adc OFFSET
adc OFFSET
lsr
adc YPOS_H
jsr HPLOT0 ; hplot(xpos,ypos_h+(o*1.5)); S
ldx XPOS_L
ldy #0
clc ; O O*1.5 NEG
lda OFFSET ; 0 = 0 0
adc OFFSET ; 1 = 1 -1
adc OFFSET ; 2 = 3 -3
lsr ; 3 = 4 -4
eor #$FF ; 4 = 6 -6
clc
adc #1
adc YPOS_H
jsr HPLOT0 ; hplot(xpos,ypos_h-(o*1.5)); N
; HPLOT X,Y: X= (y,x), Y=a
clc
lda OFFSET
adc OFFSET
adc OFFSET
lsr
adc XPOS_L
tax
ldy #0
lda YPOS_H
jsr HPLOT0 ; hplot(xpos+(o*1.5),ypos_h); E
clc ; O O*1.5 NEG
lda OFFSET ; 0 = 0 0
adc OFFSET ; 1 = 1 -1
adc OFFSET ; 2 = 3 -3
lsr ; 3 = 4 -4
eor #$FF ; 4 = 6 -6
clc
adc #1
adc XPOS_L
tax
ldy #0
lda YPOS_H
jsr HPLOT0 ; hplot(xpos-(o*1.5),ypos_h); // W
rts