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 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 `local pi, pi2, hpi = math.pi, math.pi * 2, math.pi * .5local cos, sin = math.cos, math.sinlocal atan2 = math.atan2local sqrt = math.sqrttools = {}function tools.circle(x, y, r) love.graphics.circle('fill', x, y, r, r*2) love.graphics.circle('line', x, y, r, r*2)endfunction tools.linecircle(x, y, r) love.graphics.circle('line', x, y, r, r*2)endfunction tools.fillcircle(x, y, r) love.graphics.circle('fill', x, y, r, r*2)endfunction tools.poly(...) love.graphics.polygon('fill', ...) love.graphics.polygon('line', ...)endfunction tools.darc(x, y, r, start, stop) local poly = {} local m = pi / r / 3 start = start % pi2 stop = stop % pi2 local swap = stop < start local lastblack = true for i = 0, r * 6 do local p = i*m local black if swap then black = not (p > stop and p < start) else black = p > start and p < stop end if black or lastblack then -- never add two consecutive zeros poly[#poly + 1] = x + (black and r * cos(i*m) or 0) poly[#poly + 1] = y - (black and r * sin(i*m) or 0) end lastblack = black end love.graphics.polygon('fill', poly) love.graphics.polygon('line', poly)endfunction tools.darcline(x, y, r, start, stop) local poly = {} local m = pi / r / 3 start = start % pi2 stop = stop % pi2 local swap = stop < start local lastblack = true for i = 0, r * 6 do local p = i*m local black if swap then black = not (p > stop and p < start) else black = p > start and p < stop end if black or lastblack then -- never add two consecutive zeros poly[#poly + 1] = x + (black and r * cos(i*m) or 0) poly[#poly + 1] = y - (black and r * sin(i*m) or 0) end lastblack = black end --love.graphics.polygon('fill', poly) love.graphics.polygon('line', poly)endfunction tools.square_dist(t1, t2) return (t1[1] - t2[1])^2 + (t1[2] - t2[2])^2endfunction tools.arrow(x1, y1, x2, y2) local dx = x2 - x1 local dy = y2 - y1 local angle = atan2(dy, dx) local length = sqrt(dx*dx+dy*dy) local xa, ya, arrw if length > 30 then xa, ya = x2 - 15*cos(angle), y2 - 15*sin(angle) arrw = 12 else xa, ya = x2 - length*.5*cos(angle), y2 - length*.5*sin(angle) arrw = length/30*12 end local sidex, sidey = cos(angle+hpi), sin(angle+hpi) tools.poly(x1 - 5*sidex, y1 - 5*sidey, x1 + 5*sidex, y1 + 5*sidey, xa + 3*sidex, ya + 3*sidey, xa - 3*sidex, ya - 3*sidey ) tools.poly( xa + arrw*sidex, ya + arrw*sidey, x2, y2, xa - arrw*sidex, ya - arrw*sidey )endfunction tools.part_arrow(x1, y1, x2, y2, begin_line, end_line) local dx = x2 - x1 local dy = y2 - y1 local angle = atan2(dy, dx) tools.arrow(x1 + begin_line*cos(angle), y1 + begin_line*sin(angle), x1 + end_line*cos(angle), y1 + end_line*sin(angle))end`
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