218 lines
11 KiB
Lua
218 lines
11 KiB
Lua
pico-8 cartridge // http://www.pico-8.com
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version 41
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__lua__
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-- sprite-sampled palette
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-- kistaro@gmail.com
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function _init()
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-- lock top 16 rows to default palette
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pal({[0]=0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}, 2)
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poke(0x5f5f, 0x10)
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poke2(0x5f70, 0xffff)
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mode = "boxes"
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active = "sprite"
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scx = 0
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scy = 0
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dcx = 0
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dcy = 0
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end
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function _update()
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if (btnp(🅾️)) mode = (mode == "boxes") and "rows" or "boxes"
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if (btnp(❎)) active = (active == "sprite") and "draw" or "sprite"
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if active == "sprite" then
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if (btnp(⬆️)) scy -= 1
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if (btnp(⬇️)) scy += 1
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if (btnp(⬅️)) scx -= 1
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if (btnp(➡️)) scx += 1
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else
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if (btnp(⬆️)) dcy -= 1
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if (btnp(⬇️)) dcy += 1
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if (btnp(⬅️)) dcx -= 1
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if (btnp(➡️)) dcx += 1
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end
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scx %= (mode == "boxes") and box_cols or rows_cols
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dcx %= (mode == "boxes") and box_cols or rows_cols
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scy %= (mode == "boxes") and box_rows or rows_rows
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dcy %= (mode == "boxes") and box_rows or rows_rows
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end
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function _draw()
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cls()
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draw_hud()
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draw_bars()
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end
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function draw_hud()
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palt()
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if (mode == "boxes") return draw_box_hud()
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draw_rows_hud()
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end
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function print_shadow(s,x,y,c)
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print(s,x+1,y+1,1)
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print(s,x,y,c or 7)
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end
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box_rows = 4
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box_cols = 4
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function draw_box_hud()
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spr(1,0,0,4,2)
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local toff = time() * 4 \ 1 % 2
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spr(107 + (active == "sprite" and toff or 0),
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8*scx,4*scy,1,0.5)
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spr(109 + (active == "draw" and toff or 0),
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8*dcx,4*dcy,1,0.5)
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print_shadow("spr",34,4,12)
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sspr(8+8*scx,4*scy,8,4,47,4,16,8)
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print_shadow("draw",65,4,14)
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sspr(8+8*dcx,4*dcy,8,4,83,4,16,8)
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end
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function draw_bars()
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for i=0,15 do
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local i6 = i * 6
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rectfill(0,16+i6,128,i6+21,i)
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end
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for i=0,15 do
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for y=16,120,8 do
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spr(i+112,9+i*7,y,0.625,1)
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end
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end
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for y=16,120,8 do
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spr(111,120,y)
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end
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end
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-->8
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-- palette structure
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palette = {
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-- cols: table. identical
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-- format to table-type
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-- pal call
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-- tr: transparency table.
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-- keys: [0]..[15]
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-- (color indexes)
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-- vals: true/false/nil
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-- for transparency of
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-- that color. false
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-- sets opaque, nil
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-- means "do not set".
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-- tables with no absent
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-- values can be compiled
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-- for faster do_palt.
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-- cpl_tr: compiled tr. set by
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-- compile_palt iff all
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-- tr values in range
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-- are nonnil. do_palt
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-- is faster this way
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}
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palette_mt = {__index=palette}
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function palette.new(x)
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x = x or {}
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if (not x.cols) x.cols = {}
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if (not x.tr) x.tr = {}
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setmetatable(x, palette_mt)
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end
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function palette:do_pal(p)
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pal(self.cols, p)
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end
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function palette:do_palt()
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if (self.cpl_tr) return palt(self.cpl_tr)
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local tr = self.tr
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for i=0,15 do
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if (tr[i] ~= nil) palt(i, tr[i])
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end
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end
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function palette:do_both(p)
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self:do_palt()
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self:do_pal(p)
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end
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function palette:compile_palt()
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self.cpl_tr = nil
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local bits, tr = 0, self.tr
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for i = 15,0,-1 do
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if (tr[i] == nil) return
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bits <<= 1
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if (tr[i]) bits += 1
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end
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self.cpl_tr = bits
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return bits
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end
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__gfx__
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