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66cae9a01f
a2d/desk.acc/eyes.s
Joshua Bell 66cae9a01f Eyes DA
2018-04-16 21:26:52 -07:00

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.setcpu "6502"
.include "apple2.inc"
.include "../inc/apple2.inc"
.include "../inc/prodos.inc"
.include "../mgtk.inc"
.include "../desktop.inc"
.include "../macros.inc"
.include "../inc/fp_macros.inc"
;;; ============================================================
.org $800
entry:
;;; Copy the DA to AUX for easy bank switching
.scope
lda ROMIN2
copy16 #$0800, STARTLO
copy16 #da_end, ENDLO
copy16 #$0800, DESTINATIONLO
sec ; main>aux
jsr AUXMOVE
lda LCBANK1
lda LCBANK1
.endscope
.scope
;; run the DA
sta RAMRDON
sta RAMWRTON
jsr init
;; tear down/exit
sta ALTZPON
lda LCBANK1
lda LCBANK1
sta RAMRDOFF
sta RAMWRTOFF
rts
.endscope
;;; ============================================================
screen_width := 560
screen_height := 192
da_window_id := 60
da_width := screen_width / 3
da_height := screen_height / 3
da_left := (screen_width - da_width)/2
da_top := 50
str_title:
PASCAL_STRING "Eyes"
;;; TODO: Allow resizing
.proc winfo
window_id: .byte da_window_id
options: .byte MGTK::option_go_away_box
title: .addr str_title
hscroll: .byte MGTK::scroll_option_none
vscroll: .byte MGTK::scroll_option_none
hthumbmax: .byte 32
hthumbpos: .byte 0
vthumbmax: .byte 32
vthumbpos: .byte 0
status: .byte 0
reserved: .byte 0
mincontwidth: .word da_width
mincontlength: .word da_height
maxcontwidth: .word da_width
maxcontlength: .word da_height
port:
viewloc: DEFINE_POINT da_left, da_top
mapbits: .addr MGTK::screen_mapbits
mapwidth: .word MGTK::screen_mapwidth
maprect: DEFINE_RECT 0, 0, da_width, da_height
pattern: .res 8, $FF
colormasks: .byte MGTK::colormask_and, MGTK::colormask_or
penloc: DEFINE_POINT 0, 0
penwidth: .byte 1
penheight: .byte 1
penmode: .byte 0
textback: .byte $7F
textfont: .addr DEFAULT_FONT
nextwinfo: .addr 0
.endproc
;;; ============================================================
.proc event_params
kind: .byte 0
;;; event_kind_key_down
key := *
modifiers := * + 1
;;; event_kind_update
window_id := *
;;; otherwise
xcoord := *
ycoord := * + 2
.res 4
.endproc
.proc findwindow_params
mousex: .word 0
mousey: .word 0
which_area: .byte 0
window_id: .byte 0
.endproc
.proc trackgoaway_params
clicked: .byte 0
.endproc
.proc dragwindow_params
window_id: .byte 0
dragx: .word 0
dragy: .word 0
moved: .byte 0
.endproc
.proc winport_params
window_id: .byte da_window_id
port: .addr grafport
.endproc
.proc preserve_zp_params
flag: .byte MGTK::zp_preserve
.endproc
.proc overwrite_zp_params
flag: .byte MGTK::zp_overwrite
.endproc
.proc screentowindow_params
window_id: .byte da_window_id
DEFINE_POINT 0, 0, screen
DEFINE_POINT 0, 0, window
.endproc
mx := screentowindow_params::window::xcoord
my := screentowindow_params::window::ycoord
.proc grafport
viewloc: DEFINE_POINT 0, 0
mapbits: .word 0
mapwidth: .word 0
cliprect: DEFINE_RECT 0, 0, 0, 0
pattern: .res 8, 0
colormasks: .byte 0, 0
penloc: DEFINE_POINT 0, 0
penwidth: .byte 0
penheight: .byte 0
penmode: .byte 0
textback: .byte 0
textfont: .addr 0
.endproc
;;; ============================================================
.proc init
sta ALTZPON
lda LCBANK1
lda LCBANK1
MGTK_CALL MGTK::SetZP1, preserve_zp_params
MGTK_CALL MGTK::OpenWindow, winfo
jsr draw_window
MGTK_CALL MGTK::FlushEvents
;; fall through
.endproc
.proc input_loop
MGTK_CALL MGTK::GetEvent, event_params
bne exit
lda event_params::kind
cmp #MGTK::event_kind_button_down
beq handle_down
cmp #MGTK::event_kind_key_down
beq handle_key
cmp #MGTK::event_kind_no_event
beq handle_no_event
jmp input_loop
.endproc
.proc exit
MGTK_CALL MGTK::CloseWindow, winfo
DESKTOP_CALL DT_REDRAW_ICONS
MGTK_CALL MGTK::SetZP1, overwrite_zp_params
rts
.endproc
;;; ============================================================
.proc handle_key
lda event_params::key
cmp #CHAR_ESCAPE
beq exit
bne input_loop
.endproc
;;; ============================================================
.proc handle_down
copy16 event_params::xcoord, findwindow_params::mousex
copy16 event_params::ycoord, findwindow_params::mousey
MGTK_CALL MGTK::FindWindow, findwindow_params
bne exit
lda findwindow_params::window_id
cmp winfo::window_id
bne input_loop
lda findwindow_params::which_area
cmp #MGTK::area_close_box
beq handle_close
cmp #MGTK::area_dragbar
beq handle_drag
jmp input_loop
.endproc
;;; ============================================================
.proc handle_close
MGTK_CALL MGTK::TrackGoAway, trackgoaway_params
lda trackgoaway_params::clicked
beq input_loop
bne exit
.endproc
;;; ============================================================
.proc handle_no_event
;; First time? Need to store last coords
lda has_last_coords
bne test
inc has_last_coords
bne moved
;; Moved?
test:
lda event_params::xcoord
cmp screentowindow_params::screen::xcoord
bne moved
lda event_params::xcoord+1
cmp screentowindow_params::screen::xcoord+1
bne moved
lda event_params::ycoord
cmp screentowindow_params::screen::ycoord
bne moved
lda event_params::ycoord+1
cmp screentowindow_params::screen::ycoord+1
beq done
moved: copy16 event_params::xcoord, screentowindow_params::screen::xcoord
copy16 event_params::ycoord, screentowindow_params::screen::ycoord
MGTK_CALL MGTK::ScreenToWindow, screentowindow_params
jsr draw_window
done: jmp input_loop
.endproc
;;; ============================================================
.proc handle_drag
copy winfo::window_id, dragwindow_params::window_id
copy16 event_params::xcoord, dragwindow_params::dragx
copy16 event_params::ycoord, dragwindow_params::dragy
MGTK_CALL MGTK::DragWindow, dragwindow_params
lda dragwindow_params::moved
bpl :+
;; Draw DeskTop's windows
sta RAMRDOFF
sta RAMWRTOFF
jsr JUMP_TABLE_REDRAW_ALL
sta RAMRDON
sta RAMWRTON
;; Draw DA's window
lda #0
sta has_last_coords
sta has_drawn_outline
jsr draw_window
;; Draw DeskTop icons
DESKTOP_CALL DT_REDRAW_ICONS
: jmp input_loop
.endproc
;;; ============================================================
penxor: .byte MGTK::penXOR
notpencopy: .byte MGTK::notpencopy
penw := 8
penh := 4
pupilw := penw * 2
pupilh := penh * 2
.proc outline_pensize
penwidth: .byte penw
penheight: .byte penh
.endproc
.proc pupil_pensize
penwidth: .byte pupilw
penheight: .byte pupilh
.endproc
;;; Flag set once we have coords from a move event
has_last_coords:
.byte 0
;;; Flag set once outline is drawn (cleared on window move)
has_drawn_outline:
.byte 0
;;; Saved coords
pos_l: DEFINE_POINT 0, 0, pos_l
pos_r: DEFINE_POINT 0, 0, pos_r
;;; ============================================================
.proc draw_window
ptr := $06
;; Defer until we have mouse coords
lda has_last_coords
bne :+
rts
:
;; Defer if content area is not visible
MGTK_CALL MGTK::GetWinPort, winport_params
cmp #MGTK::error_window_obscured
bne :+
rts
:
MGTK_CALL MGTK::SetPort, grafport
MGTK_CALL MGTK::HideCursor
lda has_drawn_outline
bne erase_pupils
inc has_drawn_outline
;; Draw outline
MGTK_CALL MGTK::SetPenMode, notpencopy
MGTK_CALL MGTK::SetPenSize, outline_pensize
copy16 #da_width/4, cx
copy16 #da_height/2, cy
jsr draw_outline
copy16 #da_width * 3/4, cx
copy16 #da_height/2, cy
jsr draw_outline
;; Skip erasing pupils if we're redrawing
jmp draw_pupils
erase_pupils:
MGTK_CALL MGTK::SetPenMode, penxor
MGTK_CALL MGTK::SetPenSize, pupil_pensize
MGTK_CALL MGTK::MoveTo, pos_l
MGTK_CALL MGTK::LineTo, pos_l
MGTK_CALL MGTK::MoveTo, pos_r
MGTK_CALL MGTK::LineTo, pos_r
draw_pupils:
MGTK_CALL MGTK::SetPenMode, penxor
MGTK_CALL MGTK::SetPenSize, pupil_pensize
copy16 #da_width/4, cx
copy16 #da_height/2, cy
jsr compute_pupil_pos
sub16 ppx, #pupilw/2, pos_l::xcoord
sub16 ppy, #pupilh/2, pos_l::ycoord
MGTK_CALL MGTK::MoveTo, pos_l
MGTK_CALL MGTK::LineTo, pos_l
copy16 #da_width*3/4, cx
copy16 #da_height/2, cy
jsr compute_pupil_pos
sub16 ppx, #pupilw/2, pos_r::xcoord
sub16 ppy, #pupilh/2, pos_r::ycoord
MGTK_CALL MGTK::MoveTo, pos_r
MGTK_CALL MGTK::LineTo, pos_r
MGTK_CALL MGTK::ShowCursor
done: rts
.endproc
;;; ============================================================
;;; Common input params
rx: .word da_width/4
ry: .word da_height/2
cx: .word 0
cy: .word 0
;;; ============================================================
;;; Compute pupil location
;;;
;;; Inputs: mx, my, cx, cy, rx, ry
;;; Outputs: ppx, ppy
ppx: .word 0
ppy: .word 0
.proc compute_pupil_pos
lda ROMIN2
fac_load_int cx
fac_store cxf
fac_load_int cy
fac_store cyf
;; pupil shouldn't overlap border
sub16 rx, #penw, tmpw
sub16 tmpw, #pupilw, tmpw
fac_load_int tmpw
fac_store prx
sub16 ry, #penh, tmpw
sub16 tmpw, #pupilh, tmpw
fac_load_int tmpw
fac_store pry
;; x scale, so math is circular
;; xs = pry / prx
fac_load prx
fac_div pry
fac_store scale
;; mouse delta, in transformed space
;; dx = (mx - cx) * xs
;; dy = mx - cy
fac_load_int mx ; dx = (mx - cx) * xs
fac_store tmpf
fac_load cxf
fac_sub tmpf
fac_mul scale
fac_store dx
fac_load_int my ; dy = mx - cy
fac_store tmpf
fac_load cyf
fac_sub tmpf
fac_store dy
;; d = SQR(dx * dx + dy * dy)
fac_load dx
fac_mul dx
fac_store tmpf
fac_load dy
fac_mul dy
fac_add tmpf
jsr SQR ; ??? Crashes here after window drag
;; if d > pry:
;; f = pry / d
;; dx = f * dx
;; dy = f * dy
fac_comp pry
bmi skip
fac_div pry ; f = pry / d
fac_store tmpf
fac_mul dx ; dx = f * dx
fac_store dx
fac_load tmpf ; dy = f * dy
fac_mul dy
fac_store dy
skip:
;; plot coords
;; ppx = (dx / xs) + cx
;; ppy = dy + cy
fac_load scale ; ppx = (dx / xs) + cx
fac_div dx
fac_add cxf
fac_store_int ppx
fac_load dy ; ppy = dy + cy
fac_add cyf
fac_store_int ppy
lda LCBANK1
lda LCBANK1
rts
tmpw: .word 0
tmpf: DEFINE_FLOAT
scale: DEFINE_FLOAT
dx: DEFINE_FLOAT
dy: DEFINE_FLOAT
pry: DEFINE_FLOAT
prx: DEFINE_FLOAT
cxf: DEFINE_FLOAT
cyf: DEFINE_FLOAT
.endproc
;;; ============================================================
;;; Draw eye outlines as a 36-sided polygon
;;; Inputs: cx, cy, rx, ry
.proc draw_outline
segments := 36
lda ROMIN2
fac_load_int segw
fac_div CON_TWO_PI
fac_store step
sub16 cx, #penw/2, tmpw
fac_load_int tmpw
fac_store cxf
sub16 cy, #penh/2, tmpw
fac_load_int tmpw
fac_store cyf
sub16 rx, #penw/2, tmpw
fac_load_int tmpw
fac_store rxf
sub16 ry, #penh/2, tmpw
fac_load_int tmpw
fac_store ryf
lda #segments
sta count
jsr ZERO_FAC
fac_store theta
fac_load rxf
fac_add cxf
fac_store_int ptx
fac_load cyf
fac_store_int pty
lda LCBANK1
lda LCBANK1
MGTK_CALL MGTK::MoveTo, drawpos
loop:
lda ROMIN2
fac_load theta
fac_add step
fac_store theta
jsr COS
fac_mul rxf
fac_add cxf
fac_store_int ptx
fac_load theta
jsr SIN
fac_mul ryf
fac_add cyf
fac_store_int pty
lda LCBANK1
lda LCBANK1
MGTK_CALL MGTK::LineTo, drawpos
dec count
bpl loop
rts
count: .byte 0
segw: .word segments
tmpw: .word 0
step: DEFINE_FLOAT
theta: DEFINE_FLOAT
rxf: DEFINE_FLOAT
ryf: DEFINE_FLOAT
cxf: DEFINE_FLOAT
cyf: DEFINE_FLOAT
drawpos: DEFINE_POINT 0, 0, drawpos
ptx := drawpos::xcoord
pty := drawpos::ycoord
.endproc
;;; ============================================================
da_end = *
.assert * < $1B00, error, "DA too big"
;; I/O Buffer starts at MAIN $1C00
;; ... but icon tables start at AUX $1B00
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