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102 lines
1.7 KiB
102 lines
1.7 KiB
--vectorator
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printh("\n\n\n\n\n\n\n\n\n")
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instructions = {
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"return",
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"jump",
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"scale",
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"rotate",
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"draw",
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"draw_abs",
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"move",
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"place"
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}
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function empty_state()
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return {
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stack={{"main", 1}},
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scale=1,
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position={0,0},
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rotation=0
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}
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end
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state = nil
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function vectorate(mem, callbacks)
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state = empty_state()
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while true do
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height = #state.stack
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bank = state.stack[height][1]
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index = state.stack[height][2]
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state.stack[height][2] += 1
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instruction = mem[bank][index]
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perform(state, instruction, callbacks)
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//printh(list_table(state))
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if (#state.stack == 0) break
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end
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end
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function perform(s, op, cb)
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if cb == nil then
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cb = {pre=nil, post=nil}
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end
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if cb.pre ~= nil then
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cb.pre(s, op)
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end
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if op[1] == "return" then
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s.stack[#s.stack] = nil
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elseif op[1] == "jump" then
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if m[op[2]] ~= nil then
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add(s.stack, {op[2], 1})
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end
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elseif op[1] == "scale" then
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s.scale = s.scale * op[2]
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elseif op[1] == "rotate" then
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s.rotation += op[2]
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else
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x = s.scale * (
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op[2]*cos(s.rotation)
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- op[3]*sin(s.rotation))
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y = s.scale * (
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op[2]*sin(s.rotation)
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+ op[3]*cos(s.rotation))
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if op[1] == "move" then
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s.position[1] = s.position[1] + x
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s.position[2] = s.position[2] + y
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end
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if op[1] == "place" then
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s.position[1] = x
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s.position[2] = y
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end
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if op[1] == "draw" then
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line(s.position[1], s.position[2],
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s.position[1]+x, s.position[2]+y,
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10)
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s.position[1] += x
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s.position[2] += y
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end
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if op[1] == "draw_abs" then
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line(s.position[1],
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s.position[2],
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x, y,
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10)
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s.position[1] = x
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s.position[2] = y
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end
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end
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if cb.post ~= nil then
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cb.post(s, op)
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end
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end |