{"header":{"message":"several more modules","description":"This is probably not ideal; let's see how it goes..","timestamp":"2022-05-18T04:18:17Z","authors":[{"email":"vc@akkartik.com","name":"Kartik K. 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keystrokes"],["ZUOL7X6VIPRCMEZURYGNHTDEIP3ZCHZW4PKVKBNXVZL5V4VOE5ZQC","move"],["R5QXEHUIZLELJGGCZAE7ATNS3CLRJ7JFRENMGH4XXH24C5WABZDQC","somebody stop 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end\n prev = point\n end\n"},{"Del":" elseif shape.mode == 'line' or shape.mode == 'manhattan' then\n"},{"Del":" local p1 = drawing.points[shape.p1]\n local p2 = drawing.points[shape.p2]\n love.graphics.line(pixels(p1.x)+left,pixels(p1.y)+top, pixels(p2.x)+left,pixels(p2.y)+top)\n"},{"Del":" elseif shape.mode == 'polygon' then\n local prev = nil\n for _,point in ipairs(shape.vertices) do\n local curr = drawing.points[point]\n if prev then\n love.graphics.line(pixels(prev.x)+left,pixels(prev.y)+top, pixels(curr.x)+left,pixels(curr.y)+top)\n end\n prev = curr\n end\n -- close the loop\n local curr = drawing.points[shape.vertices[1]]\n love.graphics.line(pixels(prev.x)+left,pixels(prev.y)+top, pixels(curr.x)+left,pixels(curr.y)+top)\n"},{"Del":" elseif shape.mode == 'circle' then\n local center = drawing.points[shape.center]\n love.graphics.circle('line', pixels(center.x)+left,pixels(center.y)+top, pixels(shape.radius))\n"},{"Del":" elseif shape.mode == 'arc' then\n local center = drawing.points[shape.center]\n love.graphics.arc('line', 'open', pixels(center.x)+left,pixels(center.y)+top, pixels(shape.radius), shape.start_angle, shape.end_angle, 360)\n"},{"Del":" elseif shape.mode == 'deleted' then\n"},{"Del":" else\n print(shape.mode)\n assert(false)\n"},{"Del":" end\nend\n\n"},{"Del":"function draw_pending_shape(left,top, drawing)\n local shape = drawing.pending\n"},{"Del":" if shape.mode == 'freehand' then\n"},{"Del":" draw_shape(left,top, drawing, shape)\n"},{"Del":" elseif shape.mode == 'line' then\n"},{"Del":" local p1 = drawing.points[shape.p1]\n"},{"Del":" local mx,my = coord(love.mouse.getX()-16), coord(love.mouse.getY()-drawing.y)\n if mx < 0 or mx >= 256 or my < 0 or my >= drawing.h then\n return\n end\n love.graphics.line(pixels(p1.x)+left,pixels(p1.y)+top, pixels(mx)+left,pixels(my)+top)\n"},{"Del":" elseif shape.mode == 'manhattan' then\n local p1 = drawing.points[shape.p1]\n local mx,my = coord(love.mouse.getX()-16), coord(love.mouse.getY()-drawing.y)\n"},{"Del":" if mx < 0 or mx >= 256 or my < 0 or my >= drawing.h then\n return\n end\n"},{"Del":" if math.abs(mx-p1.x) > math.abs(my-p1.y) then\n love.graphics.line(pixels(p1.x)+left,pixels(p1.y)+top, pixels(mx)+left,pixels(p1.y)+top)\n else\n love.graphics.line(pixels(p1.x)+left,pixels(p1.y)+top, pixels(p1.x)+left,pixels(my)+top)\n end\n"},{"Del":" elseif shape.mode == 'polygon' then\n -- don't close the loop on a pending polygon\n local prev = nil\n for _,point in ipairs(shape.vertices) do\n local curr = drawing.points[point]\n if prev then\n love.graphics.line(pixels(prev.x)+left,pixels(prev.y)+top, pixels(curr.x)+left,pixels(curr.y)+top)\n end\n prev = curr\n end\n love.graphics.line(pixels(prev.x)+left,pixels(prev.y)+top, love.mouse.getX(),love.mouse.getY())\n"},{"Del":" elseif shape.mode == 'circle' then\n local center = drawing.points[shape.center]\n local mx,my = coord(love.mouse.getX()-16), coord(love.mouse.getY()-drawing.y)\n if mx < 0 or mx >= 256 or my < 0 or my >= drawing.h then\n return\n end\n local cx,cy = pixels(center.x)+left, pixels(center.y)+top\n love.graphics.circle('line', cx,cy, math.dist(cx,cy, love.mouse.getX(),love.mouse.getY()))\n"},{"Del":" elseif shape.mode == 'arc' then\n local center = drawing.points[shape.center]\n local mx,my = coord(love.mouse.getX()-16), coord(love.mouse.getY()-drawing.y)\n if mx < 0 or mx >= 256 or my < 0 or my >= drawing.h then\n return\n end\n shape.end_angle = angle_with_hint(center.x,center.y, mx,my, shape.end_angle)\n local cx,cy = pixels(center.x)+left, pixels(center.y)+top\n love.graphics.arc('line', 'open', cx,cy, pixels(shape.radius), shape.start_angle, shape.end_angle, 360)\n"}]}},{"Edit":{"inode":{"change":9,"pos":2},"path":"main.lua","line":249,"atom":{"EdgeMap":{"edges":[{"previous":"BLOCK","flag":"BLOCK | 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'line' then\n"},{"Del":" return on_line(x,y, drawing, shape)\n"},{"Del":" elseif shape.mode == 'manhattan' then\n return x == drawing.points[shape.p1].x or y == drawing.points[shape.p1].y\n"},{"Del":" elseif shape.mode == 'polygon' then\n return on_polygon(x,y, drawing, shape)\n"},{"Del":" elseif shape.mode == 'circle' then\n local center = drawing.points[shape.center]\n return math.dist(center.x,center.y, x,y) == shape.radius\n"},{"Del":" elseif shape.mode == 'arc' then\n local center = drawing.points[shape.center]\n local dist = math.dist(center.x,center.y, x,y)\n if dist < shape.radius*0.95 or dist > shape.radius*1.05 then\n return false\n end\n return angle_between(center.x,center.y, x,y, shape.start_angle,shape.end_angle)\n"},{"Del":" elseif shape.mode == 'deleted' then\n"},{"Del":" else\n"},{"Del":" print(shape.mode)\n"},{"Del":" assert(false)\n end\nend\n\n"},{"Del":"function on_freehand(x,y, drawing, shape)\n"},{"Del":" local prev\n"},{"Del":" for _,p in ipairs(shape.points) do\n"},{"Del":" if prev then\n"},{"Del":" if on_line(x,y, drawing, {p1=prev, p2=p}) then\n"},{"Del":" return true\n end\n end\n prev = p\n end\n return false\nend\n\n"},{"Del":"function on_line(x,y, drawing, shape)\n local p1,p2\n if type(shape.p1) == 'number' then\n p1 = drawing.points[shape.p1]\n p2 = drawing.points[shape.p2]\n else\n p1 = shape.p1\n p2 = shape.p2\n end\n if p1.x == p2.x then\n if math.abs(p1.x-x) > 5 then\n"},{"Del":" return false\n end\n"},{"Del":" local y1,y2 = p1.y,p2.y\n"},{"Del":" if y1 > y2 then\n"},{"Del":" y1,y2 = y2,y1\n"},{"Del":" end\n return y >= y1 and y <= y2\n end\n -- has the right slope and intercept\n"},{"Del":" local m = (p2.y - p1.y) / (p2.x - p1.x)\n local yp = p1.y + m*(x-p1.x)\n"},{"Del":" if yp < 0.95*y or yp > 1.05*y then\n return false\n end\n -- between endpoints\n"},{"Del":" local k = (x-p1.x) / (p2.x-p1.x)\n"},{"Del":" return k > -0.05 and k < 1.05\nend\n\n"},{"Del":"function on_polygon(x,y, drawing, shape)\n local prev\n for _,p in ipairs(shape.vertices) do\n if prev then\n if on_line(x,y, drawing, {p1=prev, p2=p}) then\n return true\n end\n end\n prev = p\n end\n return on_line(x,y, drawing, {p1=shape.vertices[1], p2=shape.vertices[#shape.vertices]})\nend\n\n"},{"Del":"function angle_between(x1,y1, x2,y2, s,e)\n local angle = math.angle(x1,y1, x2,y2)\n"},{"Del":" if s > e then\n s,e = e,s\n end\n -- I'm not sure this is right or ideal..\n angle = angle-math.pi*2\n if s <= angle and angle <= e then\n return true\n end\n angle = angle+math.pi*2\n if s <= angle and angle <= e then\n return true\n end\n angle = angle+math.pi*2\n return s <= angle and angle <= e\nend\n\n"}]}},{"Replacement":{"inode":{"change":9,"pos":2},"path":"main.lua","line":359,"ins":{"up_context":[{"change":9,"pos":61}],"down_context":[{"change":9,"pos":99}],"flag":"BLOCK","start":2747,"end":2793,"inode":{"change":9,"pos":2}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | 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'freehand'\n"}]}},{"Replacement":{"inode":{"change":9,"pos":2},"path":"main.lua","line":364,"ins":{"up_context":[{"change":9,"pos":620}],"down_context":[{"change":9,"pos":32}],"flag":"BLOCK","start":2833,"end":2870,"inode":{"change":9,"pos":2}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":9,"pos":620},"to":{"change":9,"start":5579,"end":5608},"introduced_by":9}],"inode":{"change":9,"pos":2}},"ins_contents":[{"Add":" Current_drawing_mode = 'polygon'"}],"del_contents":[{"Del":" Current_mode = 'polygon'\n"}]}},{"Replacement":{"inode":{"change":9,"pos":2},"path":"main.lua","line":366,"ins":{"up_context":[{"change":9,"pos":86}],"down_context":[{"change":4,"pos":2}],"flag":"BLOCK","start":2871,"end":2954,"inode":{"change":9,"pos":2}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | 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load_drawing(infile_next_line)\n"},{"Del":" local drawing = {mode='drawing', h=256/2, points={}, shapes={}, pending={}}\n"},{"Del":" while true do\n"},{"Del":" local line = infile_next_line()\n"},{"Del":" assert(line)\n if line == '```' then break end\n local shape = json.decode(line)\n"},{"Del":" if shape.mode == 'line' or shape.mode == 'manhattan' then\n"},{"Del":" shape.p1 = insert_point(drawing.points, shape.p1.x, shape.p1.y)\n shape.p2 = insert_point(drawing.points, shape.p2.x, shape.p2.y)\n"},{"Del":" elseif shape.mode == 'polygon' then\n for i,p in ipairs(shape.vertices) do\n shape.vertices[i] = insert_point(drawing.points, p.x,p.y)\n end\n elseif shape.mode == 'circle' or shape.mode == 'arc' then\n shape.center = insert_point(drawing.points, shape.center.x,shape.center.y)\n"},{"Del":" end\n table.insert(drawing.shapes, shape)\n end\n return drawing\nend\n\nfunction store_drawing(outfile, drawing)\n outfile:write('```lines\\n')\n for _,shape in ipairs(drawing.shapes) do\n"},{"Del":" if shape.mode == 'freehand' then\n"},{"Del":" outfile:write(json.encode(shape)..'\\n')\n"},{"Del":" elseif shape.mode == 'line' or shape.mode == 'manhattan' then\n"},{"Del":" local line = json.encode({mode=shape.mode, p1=drawing.points[shape.p1], p2=drawing.points[shape.p2]})\n"},{"Del":" outfile:write(line..'\\n')\n elseif shape.mode == 'polygon' then\n local obj = {mode=shape.mode, vertices={}}\n for _,p in ipairs(shape.vertices) do\n table.insert(obj.vertices, drawing.points[p])\n end\n local line = json.encode(obj)\n"},{"Del":" outfile:write(line..'\\n')\n"},{"Del":" elseif shape.mode == 'circle' then\n"},{"Del":" outfile:write(json.encode({mode=shape.mode, center=drawing.points[shape.center], radius=shape.radius})..'\\n')\n elseif shape.mode == 'arc' then\n outfile:write(json.encode({mode=shape.mode, center=drawing.points[shape.center], radius=shape.radius, start_angle=shape.start_angle, end_angle=shape.end_angle})..'\\n')\n"},{"Del":" end\n end\n outfile:write('```\\n')\n"},{"Del":"end\n\nicon = {}\n"},{"Del":"\nfunction icon.insert_drawing(x, y)\n love.graphics.setColor(0.7,0.7,0.7)\n love.graphics.rectangle('line', x,y, 12,12)\n love.graphics.line(4,y+6, 16,y+6)\n love.graphics.line(10,y, 10,y+12)\n love.graphics.setColor(0, 0, 0)\nend\n"},{"Del":"\nfunction icon.freehand(x, y)\n love.graphics.line(x+4,y+7,x+5,y+5)\n love.graphics.line(x+5,y+5,x+7,y+4)\n love.graphics.line(x+7,y+4,x+9,y+3)\n love.graphics.line(x+9,y+3,x+10,y+5)\n love.graphics.line(x+10,y+5,x+12,y+6)\n love.graphics.line(x+12,y+6,x+13,y+8)\n love.graphics.line(x+13,y+8,x+13,y+10)\n love.graphics.line(x+13,y+10,x+14,y+12)\n love.graphics.line(x+14,y+12,x+15,y+14)\n love.graphics.line(x+15,y+14,x+15,y+16)\n"},{"Del":"end\n"},{"Del":"\nfunction icon.line(x, y)\n love.graphics.line(x+4,y+2, x+16,y+18)\nend\n\nfunction icon.manhattan(x, y)\n love.graphics.line(x+4,y+20, x+4,y+2)\n love.graphics.line(x+4,y+2, x+10,y+2)\n love.graphics.line(x+10,y+2, x+10,y+10)\n love.graphics.line(x+10,y+10, x+18,y+10)\nend\n\nfunction icon.polygon(x, y)\n love.graphics.line(x+8,y+2, x+14,y+2)\n love.graphics.line(x+14,y+2, x+18,y+10)\n love.graphics.line(x+18,y+10, x+10,y+18)\n love.graphics.line(x+10,y+18, x+4,y+12)\n love.graphics.line(x+4,y+12, x+8,y+2)\nend\n\nfunction icon.circle(x, y)\n love.graphics.circle('line', x+10,y+10, 8)\n"},{"Del":"end\n\nfunction draw_help_without_mouse_pressed(drawing)\n love.graphics.setColor(0,0.5,0)\n"},{"Del":" local y = drawing.y+10\n"},{"Del":" love.graphics.print(\"Things you can do:\", 16+30,y, 0, Zoom)\n y = y+15*Zoom\n love.graphics.print(\"* Press the mouse button to start drawing a \"..current_shape(), 16+30,y, 0, Zoom)\n y = y+15*Zoom\n love.graphics.print(\"* Hover on a point and press 'ctrl+v' to start moving it,\", 16+30,y, 0, Zoom)\n y = y+15*Zoom\n love.graphics.print(\"then press the mouse button to finish\", 16+30+bullet_indent(),y, 0, Zoom)\n y = y+15*Zoom\n love.graphics.print(\"* Hover on a point or shape and press 'ctrl+d' to delete it\", 16+30,y, 0, Zoom)\n y = y+15*Zoom\n y = y+15*Zoom\n if Current_mode ~= 'freehand' then\n love.graphics.print(\"* Press 'ctrl+f' to switch to drawing freehand strokes\", 16+30,y, 0, Zoom)\n y = y+15*Zoom\n"},{"Del":" end\n"},{"Del":" if Current_mode ~= 'line' then\n love.graphics.print(\"* Press 'ctrl+l' to switch to drawing lines\", 16+30,y, 0, Zoom)\n y = y+15*Zoom\n"},{"Del":" end\n"},{"Del":" if Current_mode ~= 'manhattan' then\n love.graphics.print(\"* Press 'ctrl+m' to switch to drawing horizontal/vertical lines\", 16+30,y, 0, Zoom)\n y = y+15*Zoom\n"},{"Del":" end\n"},{"Del":" if Current_mode ~= 'circle' then\n love.graphics.print(\"* Press 'ctrl+c' to switch to drawing circles/arcs\", 16+30,y, 0, Zoom)\n y = y+15*Zoom\n"},{"Del":" end\n"},{"Del":" if Current_mode ~= 'polygon' then\n love.graphics.print(\"* Press 'ctrl+g' to switch to drawing polygons\", 16+30,y, 0, Zoom)\n y = y+15*Zoom\n"},{"Del":" end\n"},{"Del":" love.graphics.print(\"* Press 'ctrl+=' or 'ctrl+-' to Zoom in or out\", 16+30,y, 0, Zoom)\n y = y+15*Zoom\n love.graphics.print(\"* Press 'ctrl+0' to reset Zoom\", 16+30,y, 0, Zoom)\n y = y+15*Zoom\n y = y+15*Zoom\n love.graphics.print(\"Hit 'esc' now to hide this message\", 16+30,y, 0, Zoom)\n y = y+15*Zoom\n"},{"Del":" love.graphics.setColor(0,0.5,0, 0.1)\n"},{"Del":" love.graphics.rectangle('fill', 16,drawing.y, Drawing_width, math.max(pixels(drawing.h),y-drawing.y))\n"},{"Del":"end\n\nfunction draw_help_with_mouse_pressed(drawing)\n love.graphics.setColor(0,0.5,0)\n"},{"Del":" local y = drawing.y+10\n"},{"Del":" love.graphics.print(\"You're currently drawing a \"..current_shape(drawing.pending), 16+30,y, 0, Zoom)\n y = y+15*Zoom\n love.graphics.print('Things you can do now:', 16+30,y, 0, Zoom)\n y = y+15*Zoom\n if Current_mode == 'freehand' then\n love.graphics.print('* Release the mouse button to finish drawing the stroke', 16+30,y, 0, Zoom)\n y = y+15*Zoom\n elseif Current_mode == 'line' or Current_mode == 'manhattan' then\n love.graphics.print('* Release the mouse button to finish drawing the line', 16+30,y, 0, Zoom)\n y = y+15*Zoom\n elseif Current_mode == 'circle' then\n"},{"Del":" if drawing.pending.mode == 'circle' then\n"},{"Del":" love.graphics.print('* Release the mouse button to finish drawing the circle', 16+30,y, 0, Zoom)\n y = y+15*Zoom\n love.graphics.print(\"* Press 'a' to draw just an arc of a circle\", 16+30,y, 0, Zoom)\n"},{"Del":" else\n"},{"Del":" love.graphics.print('* Release the mouse button to finish drawing the arc', 16+30,y, 0, Zoom)\n"},{"Del":" end\n"},{"Del":" y = y+15*Zoom\n elseif Current_mode == 'polygon' then\n love.graphics.print('* Release the mouse button to finish drawing the polygon', 16+30,y, 0, Zoom)\n y = y+15*Zoom\n love.graphics.print(\"* Press 'p' to add a vertex to the polygon\", 16+30,y, 0, Zoom)\n y = y+15*Zoom\n"},{"Del":" end\n"},{"Del":" love.graphics.print(\"* Press 'esc' then release the mouse button to cancel the current shape\", 16+30,y, 0, Zoom)\n y = y+15*Zoom\n y = y+15*Zoom\n if Current_mode ~= 'line' then\n love.graphics.print(\"* Press 'l' to switch to drawing lines\", 16+30,y, 0, Zoom)\n y = y+15*Zoom\n"},{"Del":" end\n"},{"Del":" if Current_mode ~= 'manhattan' then\n love.graphics.print(\"* Press 'm' to switch to drawing horizontal/vertical lines\", 16+30,y, 0, Zoom)\n y = y+15*Zoom\n"},{"Del":" end\n"},{"Del":" if Current_mode ~= 'circle' then\n love.graphics.print(\"* Press 'c' to switch to drawing circles/arcs\", 16+30,y, 0, Zoom)\n y = y+15*Zoom\n"},{"Del":" end\n"},{"Del":" if Current_mode ~= 'polygon' then\n love.graphics.print(\"* Press 'g' to switch to drawing polygons\", 16+30,y, 0, Zoom)\n y = y+15*Zoom\n"},{"Del":" end\n"},{"Del":" love.graphics.setColor(0,0.5,0, 0.1)\n"},{"Del":" love.graphics.rectangle('fill', 16,drawing.y, Drawing_width, math.max(pixels(drawing.h),y-drawing.y))\n"},{"Del":"end\n\n"},{"Del":"function current_shape(shape)\n"},{"Del":" if Current_mode == 'freehand' then\n"},{"Del":" return 'freehand stroke'\n"},{"Del":" elseif Current_mode == 'line' then\n"},{"Del":" return 'straight line'\n"},{"Del":" elseif Current_mode == 'manhattan' then\n"},{"Del":" return 'horizontal/vertical line'\n"},{"Del":" elseif Current_mode == 'circle' and shape and shape.start_angle then\n"},{"Del":" return 'arc'\n"},{"Del":" else\n"},{"Del":" return Current_mode\n"},{"Del":" end\nend\n\n"},{"Del":"_bullet_indent = nil\nfunction bullet_indent()\n if _bullet_indent == nil then\n local text = love.graphics.newText(love.graphics.getFont(), '* ')\n _bullet_indent = text:getWidth()\n end\n return _bullet_indent\n"},{"Del":"end\n"}]}},{"FileAdd":{"meta":{"basename":"icons.lua","metadata":0},"context":[{"change":85,"pos":2}],"contents":[{"Add":"icon = {}"},{"Add":""},{"Add":"function icon.insert_drawing(x, y)"},{"Add":" love.graphics.setColor(0.7,0.7,0.7)"},{"Add":" love.graphics.rectangle('line', x,y, 12,12)"},{"Add":" love.graphics.line(4,y+6, 16,y+6)"},{"Add":" love.graphics.line(10,y, 10,y+12)"},{"Add":" love.graphics.setColor(0, 0, 0)"},{"Add":"end"},{"Add":""},{"Add":"function icon.freehand(x, y)"},{"Add":" love.graphics.line(x+4,y+7,x+5,y+5)"},{"Add":" love.graphics.line(x+5,y+5,x+7,y+4)"},{"Add":" love.graphics.line(x+7,y+4,x+9,y+3)"},{"Add":" love.graphics.line(x+9,y+3,x+10,y+5)"},{"Add":" love.graphics.line(x+10,y+5,x+12,y+6)"},{"Add":" love.graphics.line(x+12,y+6,x+13,y+8)"},{"Add":" love.graphics.line(x+13,y+8,x+13,y+10)"},{"Add":" love.graphics.line(x+13,y+10,x+14,y+12)"},{"Add":" love.graphics.line(x+14,y+12,x+15,y+14)"},{"Add":" love.graphics.line(x+15,y+14,x+15,y+16)"},{"Add":"end"},{"Add":""},{"Add":"function icon.line(x, y)"},{"Add":" love.graphics.line(x+4,y+2, x+16,y+18)"},{"Add":"end"},{"Add":""},{"Add":"function icon.manhattan(x, y)"},{"Add":" love.graphics.line(x+4,y+20, x+4,y+2)"},{"Add":" love.graphics.line(x+4,y+2, x+10,y+2)"},{"Add":" love.graphics.line(x+10,y+2, x+10,y+10)"},{"Add":" love.graphics.line(x+10,y+10, x+18,y+10)"},{"Add":"end"},{"Add":""},{"Add":"function icon.polygon(x, y)"},{"Add":" love.graphics.line(x+8,y+2, x+14,y+2)"},{"Add":" love.graphics.line(x+14,y+2, x+18,y+10)"},{"Add":" love.graphics.line(x+18,y+10, x+10,y+18)"},{"Add":" love.graphics.line(x+10,y+18, x+4,y+12)"},{"Add":" love.graphics.line(x+4,y+12, x+8,y+2)"},{"Add":"end"},{"Add":""},{"Add":"function icon.circle(x, y)"},{"Add":" love.graphics.circle('line', x+10,y+10, 8)"},{"Add":"end"}]}},{"FileAdd":{"meta":{"basename":"help.lua","metadata":0},"context":[{"change":85,"pos":2}],"contents":[{"Add":"function draw_help_without_mouse_pressed(drawing)"},{"Add":" love.graphics.setColor(0,0.5,0)"},{"Add":" local y = drawing.y+10"},{"Add":" love.graphics.print(\"Things you can do:\", 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" love.graphics.print(\"* Press the mouse button to start drawing a \"..current_shape(), 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" love.graphics.print(\"* Hover on a point and press 'ctrl+v' to start moving it,\", 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" love.graphics.print(\"then press the mouse button to finish\", 16+30+bullet_indent(),y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" love.graphics.print(\"* Hover on a point or shape and press 'ctrl+d' to delete it\", 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" y = y+15*Zoom"},{"Add":" if Current_drawing_mode ~= 'freehand' then"},{"Add":" love.graphics.print(\"* Press 'ctrl+f' to switch to drawing freehand strokes\", 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" end"},{"Add":" if Current_drawing_mode ~= 'line' then"},{"Add":" love.graphics.print(\"* Press 'ctrl+l' to switch to drawing lines\", 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" end"},{"Add":" if Current_drawing_mode ~= 'manhattan' then"},{"Add":" love.graphics.print(\"* Press 'ctrl+m' to switch to drawing horizontal/vertical lines\", 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" end"},{"Add":" if Current_drawing_mode ~= 'circle' then"},{"Add":" love.graphics.print(\"* Press 'ctrl+c' to switch to drawing circles/arcs\", 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" end"},{"Add":" if Current_drawing_mode ~= 'polygon' then"},{"Add":" love.graphics.print(\"* Press 'ctrl+g' to switch to drawing polygons\", 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" end"},{"Add":" love.graphics.print(\"* Press 'ctrl+=' or 'ctrl+-' to Zoom in or out\", 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" love.graphics.print(\"* Press 'ctrl+0' to reset Zoom\", 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" y = y+15*Zoom"},{"Add":" love.graphics.print(\"Hit 'esc' now to hide this message\", 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" love.graphics.setColor(0,0.5,0, 0.1)"},{"Add":" love.graphics.rectangle('fill', 16,drawing.y, Drawing_width, math.max(Drawing.pixels(drawing.h),y-drawing.y))"},{"Add":"end"},{"Add":""},{"Add":"function draw_help_with_mouse_pressed(drawing)"},{"Add":" love.graphics.setColor(0,0.5,0)"},{"Add":" local y = drawing.y+10"},{"Add":" love.graphics.print(\"You're currently drawing a \"..current_shape(drawing.pending), 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" love.graphics.print('Things you can do now:', 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" if Current_drawing_mode == 'freehand' then"},{"Add":" love.graphics.print('* Release the mouse button to finish drawing the stroke', 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" elseif Current_drawing_mode == 'line' or Current_drawing_mode == 'manhattan' then"},{"Add":" love.graphics.print('* Release the mouse button to finish drawing the line', 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" elseif Current_drawing_mode == 'circle' then"},{"Add":" if drawing.pending.mode == 'circle' then"},{"Add":" love.graphics.print('* Release the mouse button to finish drawing the circle', 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" love.graphics.print(\"* Press 'a' to draw just an arc of a circle\", 16+30,y, 0, Zoom)"},{"Add":" else"},{"Add":" love.graphics.print('* Release the mouse button to finish drawing the arc', 16+30,y, 0, Zoom)"},{"Add":" end"},{"Add":" y = y+15*Zoom"},{"Add":" elseif Current_drawing_mode == 'polygon' then"},{"Add":" love.graphics.print('* Release the mouse button to finish drawing the polygon', 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" love.graphics.print(\"* Press 'p' to add a vertex to the polygon\", 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" end"},{"Add":" love.graphics.print(\"* Press 'esc' then release the mouse button to cancel the current shape\", 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" y = y+15*Zoom"},{"Add":" if Current_drawing_mode ~= 'line' then"},{"Add":" love.graphics.print(\"* Press 'l' to switch to drawing lines\", 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" end"},{"Add":" if Current_drawing_mode ~= 'manhattan' then"},{"Add":" love.graphics.print(\"* Press 'm' to switch to drawing horizontal/vertical lines\", 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" end"},{"Add":" if Current_drawing_mode ~= 'circle' then"},{"Add":" love.graphics.print(\"* Press 'c' to switch to drawing circles/arcs\", 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" end"},{"Add":" if Current_drawing_mode ~= 'polygon' then"},{"Add":" love.graphics.print(\"* Press 'g' to switch to drawing polygons\", 16+30,y, 0, Zoom)"},{"Add":" y = y+15*Zoom"},{"Add":" end"},{"Add":" love.graphics.setColor(0,0.5,0, 0.1)"},{"Add":" love.graphics.rectangle('fill', 16,drawing.y, Drawing_width, math.max(Drawing.pixels(drawing.h),y-drawing.y))"},{"Add":"end"},{"Add":""},{"Add":"function current_shape(shape)"},{"Add":" if Current_drawing_mode == 'freehand' then"},{"Add":" return 'freehand stroke'"},{"Add":" elseif Current_drawing_mode == 'line' then"},{"Add":" return 'straight line'"},{"Add":" elseif Current_drawing_mode == 'manhattan' then"},{"Add":" return 'horizontal/vertical line'"},{"Add":" elseif Current_drawing_mode == 'circle' and shape and shape.start_angle then"},{"Add":" return 'arc'"},{"Add":" else"},{"Add":" return Current_drawing_mode"},{"Add":" end"},{"Add":"end"},{"Add":""},{"Add":"_bullet_indent = nil"},{"Add":"function bullet_indent()"},{"Add":" if _bullet_indent == nil then"},{"Add":" local text = love.graphics.newText(love.graphics.getFont(), '* ')"},{"Add":" _bullet_indent = text:getWidth()"},{"Add":" end"},{"Add":" return _bullet_indent"},{"Add":"end"}]}},{"FileAdd":{"meta":{"basename":"geom.lua","metadata":0},"context":[{"change":85,"pos":2}],"contents":[{"Add":"local geom = {}"},{"Add":""},{"Add":"function geom.on_shape(x,y, drawing, shape)"},{"Add":" if shape.mode == 'freehand' then"},{"Add":" return geom.on_freehand(x,y, drawing, shape)"},{"Add":" elseif shape.mode == 'line' then"},{"Add":" return geom.on_line(x,y, drawing, shape)"},{"Add":" elseif shape.mode == 'manhattan' then"},{"Add":" return x == drawing.points[shape.p1].x or y == drawing.points[shape.p1].y"},{"Add":" elseif shape.mode == 'polygon' then"},{"Add":" return geom.on_polygon(x,y, drawing, shape)"},{"Add":" elseif shape.mode == 'circle' then"},{"Add":" local center = drawing.points[shape.center]"},{"Add":" return math.dist(center.x,center.y, x,y) == shape.radius"},{"Add":" elseif shape.mode == 'arc' then"},{"Add":" local center = drawing.points[shape.center]"},{"Add":" local dist = math.dist(center.x,center.y, x,y)"},{"Add":" if dist < shape.radius*0.95 or dist > shape.radius*1.05 then"},{"Add":" return false"},{"Add":" end"},{"Add":" return geom.angle_between(center.x,center.y, x,y, shape.start_angle,shape.end_angle)"},{"Add":" elseif shape.mode == 'deleted' then"},{"Add":" else"},{"Add":" print(shape.mode)"},{"Add":" assert(false)"},{"Add":" end"},{"Add":"end"},{"Add":""},{"Add":"function geom.on_freehand(x,y, drawing, shape)"},{"Add":" local prev"},{"Add":" for _,p in ipairs(shape.points) do"},{"Add":" if prev then"},{"Add":" if geom.on_line(x,y, drawing, {p1=prev, p2=p}) then"},{"Add":" return true"},{"Add":" end"},{"Add":" end"},{"Add":" prev = p"},{"Add":" end"},{"Add":" return false"},{"Add":"end"},{"Add":""},{"Add":"function geom.on_line(x,y, drawing, shape)"},{"Add":" local p1,p2"},{"Add":" if type(shape.p1) == 'number' then"},{"Add":" p1 = drawing.points[shape.p1]"},{"Add":" p2 = drawing.points[shape.p2]"},{"Add":" else"},{"Add":" p1 = shape.p1"},{"Add":" p2 = shape.p2"},{"Add":" end"},{"Add":" if p1.x == p2.x then"},{"Add":" if math.abs(p1.x-x) > 5 then"},{"Add":" return false"},{"Add":" end"},{"Add":" local y1,y2 = p1.y,p2.y"},{"Add":" if y1 > y2 then"},{"Add":" y1,y2 = y2,y1"},{"Add":" end"},{"Add":" return y >= y1 and y <= y2"},{"Add":" end"},{"Add":" -- has the right slope and intercept"},{"Add":" local m = (p2.y - p1.y) / (p2.x - p1.x)"},{"Add":" local yp = p1.y + m*(x-p1.x)"},{"Add":" if yp < 0.95*y or yp > 1.05*y then"},{"Add":" return false"},{"Add":" end"},{"Add":" -- between endpoints"},{"Add":" local k = (x-p1.x) / (p2.x-p1.x)"},{"Add":" return k > -0.05 and k < 1.05"},{"Add":"end"},{"Add":""},{"Add":"function geom.on_polygon(x,y, drawing, shape)"},{"Add":" local prev"},{"Add":" for _,p in ipairs(shape.vertices) do"},{"Add":" if prev then"},{"Add":" if geom.on_line(x,y, drawing, {p1=prev, p2=p}) then"},{"Add":" return true"},{"Add":" end"},{"Add":" end"},{"Add":" prev = p"},{"Add":" end"},{"Add":" return geom.on_line(x,y, drawing, {p1=shape.vertices[1], p2=shape.vertices[#shape.vertices]})"},{"Add":"end"},{"Add":""},{"Add":"function geom.angle_with_hint(x1, y1, x2, y2, hint)"},{"Add":" local result = geom.angle(x1,y1, x2,y2)"},{"Add":" if hint then"},{"Add":" -- Smooth the discontinuity where angle goes from positive to negative."},{"Add":" -- The hint is a memory of which way we drew it last time."},{"Add":" while result > hint+math.pi/10 do"},{"Add":" result = result-math.pi*2"},{"Add":" end"},{"Add":" while result < hint-math.pi/10 do"},{"Add":" result = result+math.pi*2"},{"Add":" end"},{"Add":" end"},{"Add":" return result"},{"Add":"end"},{"Add":""},{"Add":"-- result is from -π/2 to 3π/2, approximately adding math.atan2 from Lua 5.3"},{"Add":"-- (LÖVE is Lua 5.1)"},{"Add":"function geom.angle(x1,y1, x2,y2)"},{"Add":" local result = math.atan((y2-y1)/(x2-x1))"},{"Add":" if x2 < x1 then"},{"Add":" result = result+math.pi"},{"Add":" end"},{"Add":" return result"},{"Add":"end"},{"Add":""},{"Add":"-- is the line between x,y and cx,cy at an angle between s and e?"},{"Add":"function geom.angle_between(ox,oy, x,y, s,e)"},{"Add":" local angle = math.angle(ox,oy, x,y)"},{"Add":" if s > e then"},{"Add":" s,e = e,s"},{"Add":" end"},{"Add":" -- I'm not sure this is right or ideal.."},{"Add":" angle = angle-math.pi*2"},{"Add":" if s <= angle and angle <= e then"},{"Add":" return true"},{"Add":" end"},{"Add":" angle = angle+math.pi*2"},{"Add":" if s <= angle and angle <= e then"},{"Add":" return true"},{"Add":" end"},{"Add":" angle = angle+math.pi*2"},{"Add":" return s <= angle and angle <= e"},{"Add":"end"},{"Add":""},{"Add":"function geom.dist(x1,y1, x2,y2) return ((x2-x1)^2+(y2-y1)^2)^0.5 end"},{"Add":""},{"Add":"return geom"}]}},{"FileAdd":{"meta":{"basename":"file.lua","metadata":0},"context":[{"change":85,"pos":2}],"contents":[{"Add":"-- primitives for saving to file and loading from file"},{"Add":"Drawing = require 'drawing'"},{"Add":""},{"Add":"function load_from_disk(filename)"},{"Add":" local infile = io.open(filename)"},{"Add":" local result = load_from_file(infile)"},{"Add":" if infile then infile:close() end"},{"Add":" return result"},{"Add":"end"},{"Add":""},{"Add":"function load_from_file(infile)"},{"Add":" local result = {}"},{"Add":" if infile then"},{"Add":" local infile_next_line = infile:lines() -- works with both Lua files and LÖVE Files (https://www.love2d.org/wiki/File)"},{"Add":" while true do"},{"Add":" local line = infile_next_line()"},{"Add":" if line == nil then break end"},{"Add":" if line == '```lines' then -- inflexible with whitespace since these files are always autogenerated"},{"Add":" table.insert(result, load_drawing(infile_next_line))"},{"Add":" else"},{"Add":" table.insert(result, {mode='text', data=line})"},{"Add":" end"},{"Add":" end"},{"Add":" end"},{"Add":" if #result == 0 then"},{"Add":" table.insert(result, {mode='text', data=''})"},{"Add":" end"},{"Add":" return result"},{"Add":"end"},{"Add":""},{"Add":"function save_to_disk(lines, filename)"},{"Add":" local outfile = io.open(filename, 'w')"},{"Add":" for _,line in ipairs(lines) do"},{"Add":" if line.mode == 'drawing' then"},{"Add":" store_drawing(outfile, line)"},{"Add":" else"},{"Add":" outfile:write(line.data..'\\n')"},{"Add":" end"},{"Add":" end"},{"Add":" outfile:close()"},{"Add":"end"},{"Add":""},{"Add":"json = require 'json'"},{"Add":"function load_drawing(infile_next_line)"},{"Add":" local drawing = {mode='drawing', h=256/2, points={}, shapes={}, pending={}}"},{"Add":" while true do"},{"Add":" local line = infile_next_line()"},{"Add":" assert(line)"},{"Add":" if line == '```' then break end"},{"Add":" local shape = json.decode(line)"},{"Add":" if shape.mode == 'line' or shape.mode == 'manhattan' then"},{"Add":" shape.p1 = Drawing.insert_point(drawing.points, shape.p1.x, shape.p1.y)"},{"Add":" shape.p2 = Drawing.insert_point(drawing.points, shape.p2.x, shape.p2.y)"},{"Add":" elseif shape.mode == 'polygon' then"},{"Add":" for i,p in ipairs(shape.vertices) do"},{"Add":" shape.vertices[i] = Drawing.insert_point(drawing.points, p.x,p.y)"},{"Add":" end"},{"Add":" elseif shape.mode == 'circle' or shape.mode == 'arc' then"},{"Add":" shape.center = Drawing.insert_point(drawing.points, shape.center.x,shape.center.y)"},{"Add":" end"},{"Add":" table.insert(drawing.shapes, shape)"},{"Add":" end"},{"Add":" return drawing"},{"Add":"end"},{"Add":""},{"Add":"function store_drawing(outfile, drawing)"},{"Add":" outfile:write('```lines\\n')"},{"Add":" for _,shape in ipairs(drawing.shapes) do"},{"Add":" if shape.mode == 'freehand' then"},{"Add":" outfile:write(json.encode(shape)..'\\n')"},{"Add":" elseif shape.mode == 'line' or shape.mode == 'manhattan' then"},{"Add":" local line = json.encode({mode=shape.mode, p1=drawing.points[shape.p1], p2=drawing.points[shape.p2]})"},{"Add":" outfile:write(line..'\\n')"},{"Add":" elseif shape.mode == 'polygon' then"},{"Add":" local obj = {mode=shape.mode, vertices={}}"},{"Add":" for _,p in ipairs(shape.vertices) do"},{"Add":" table.insert(obj.vertices, drawing.points[p])"},{"Add":" end"},{"Add":" local line = json.encode(obj)"},{"Add":" outfile:write(line..'\\n')"},{"Add":" elseif shape.mode == 'circle' then"},{"Add":" outfile:write(json.encode({mode=shape.mode, center=drawing.points[shape.center], radius=shape.radius})..'\\n')"},{"Add":" elseif shape.mode == 'arc' then"},{"Add":" outfile:write(json.encode({mode=shape.mode, center=drawing.points[shape.center], radius=shape.radius, start_angle=shape.start_angle, end_angle=shape.end_angle})..'\\n')"},{"Add":" end"},{"Add":" end"},{"Add":" outfile:write('```\\n')"},{"Add":"end"}]}},{"Edit":{"inode":{"change":7,"pos":98},"path":"drawing.lua","line":3,"atom":{"NewVertex":{"up_context":[{"change":7,"pos":147}],"down_context":[{"change":7,"pos":147}],"flag":"BLOCK","start":18246,"end":18268,"inode":{"change":7,"pos":98}}},"contents":[{"Add":"geom = require 'geom'"}]}},{"Replacement":{"inode":{"change":7,"pos":98},"path":"drawing.lua","line":7,"ins":{"up_context":[{"change":7,"pos":234}],"down_context":[{"change":7,"pos":316}],"flag":"BLOCK","start":18269,"end":18359,"inode":{"change":7,"pos":98}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":7,"pos":234},"to":{"change":7,"start":234,"end":316},"introduced_by":7}],"inode":{"change":7,"pos":98}},"ins_contents":[{"Add":" if pmx < 16+Drawing_width and pmy > line.y and pmy < line.y+Drawing.pixels(line.h) then"}],"del_contents":[{"Del":" if pmx < 16+Drawing_width and pmy > line.y and pmy < line.y+pixels(line.h) then\n"}]}},{"Replacement":{"inode":{"change":7,"pos":98},"path":"drawing.lua","line":9,"ins":{"up_context":[{"change":7,"pos":359}],"down_context":[{"change":7,"pos":523}],"flag":"BLOCK","start":18360,"end":18548,"inode":{"change":7,"pos":98}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":7,"pos":359},"to":{"change":7,"start":359,"end":523},"introduced_by":7}],"inode":{"change":7,"pos":98}},"ins_contents":[{"Add":" love.graphics.rectangle('line', 16,line.y, Drawing_width,Drawing.pixels(line.h))"},{"Add":" if icon[Current_drawing_mode] then"},{"Add":" icon[Current_drawing_mode](16+Drawing_width-20, line.y+4)"}],"del_contents":[{"Del":" love.graphics.rectangle('line', 16,line.y, Drawing_width,pixels(line.h))\n if icon[Current_mode] then\n icon[Current_mode](16+Drawing_width-20, line.y+4)\n"}]}},{"Replacement":{"inode":{"change":7,"pos":98},"path":"drawing.lua","line":13,"ins":{"up_context":[{"change":7,"pos":532}],"down_context":[{"change":7,"pos":589}],"flag":"BLOCK","start":18549,"end":18614,"inode":{"change":7,"pos":98}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":7,"pos":532},"to":{"change":7,"start":532,"end":589},"introduced_by":7}],"inode":{"change":7,"pos":98}},"ins_contents":[{"Add":" icon[Previous_drawing_mode](16+Drawing_width-20, line.y+4)"}],"del_contents":[{"Del":" icon[Previous_mode](16+Drawing_width-20, line.y+4)\n"}]}},{"Replacement":{"inode":{"change":7,"pos":98},"path":"drawing.lua","line":27,"ins":{"up_context":[{"change":7,"pos":817}],"down_context":[{"change":7,"pos":894}],"flag":"BLOCK","start":18615,"end":18708,"inode":{"change":7,"pos":98}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":7,"pos":817},"to":{"change":7,"start":817,"end":894},"introduced_by":7}],"inode":{"change":7,"pos":98}},"ins_contents":[{"Add":" local mx,my = Drawing.coord(love.mouse.getX()-16), Drawing.coord(love.mouse.getY()-line.y)"}],"del_contents":[{"Del":" local mx,my = coord(love.mouse.getX()-16), coord(love.mouse.getY()-line.y)\n"}]}},{"Replacement":{"inode":{"change":7,"pos":98},"path":"drawing.lua","line":31,"ins":{"up_context":[{"change":7,"pos":953}],"down_context":[{"change":7,"pos":994}],"flag":"BLOCK","start":18709,"end":18755,"inode":{"change":7,"pos":98}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":7,"pos":953},"to":{"change":7,"start":953,"end":994},"introduced_by":7}],"inode":{"change":7,"pos":98}},"ins_contents":[{"Add":" if geom.on_shape(mx,my, line, shape) then"}],"del_contents":[{"Del":" if on_shape(mx,my, line, shape) then\n"}]}},{"Replacement":{"inode":{"change":7,"pos":98},"path":"drawing.lua","line":36,"ins":{"up_context":[{"change":7,"pos":1083}],"down_context":[{"change":7,"pos":1122}],"flag":"BLOCK","start":18756,"end":18803,"inode":{"change":7,"pos":98}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":7,"pos":1083},"to":{"change":7,"start":1083,"end":1122},"introduced_by":7}],"inode":{"change":7,"pos":98}},"ins_contents":[{"Add":" Drawing.draw_shape(16,line.y, line, shape)"}],"del_contents":[{"Del":" draw_shape(16,line.y, line, shape)\n"}]}},{"Replacement":{"inode":{"change":7,"pos":98},"path":"drawing.lua","line":40,"ins":{"up_context":[{"change":7,"pos":1193}],"down_context":[{"change":7,"pos":1222}],"flag":"BLOCK","start":18804,"end":18841,"inode":{"change":7,"pos":98}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":7,"pos":1193},"to":{"change":7,"start":1193,"end":1222},"introduced_by":7}],"inode":{"change":7,"pos":98}},"ins_contents":[{"Add":" if Drawing.near(p, mx,my) then"}],"del_contents":[{"Del":" if near(p, mx,my) then\n"}]}},{"Replacement":{"inode":{"change":7,"pos":98},"path":"drawing.lua","line":42,"ins":{"up_context":[{"change":7,"pos":1260}],"down_context":[{"change":7,"pos":1335}],"flag":"BLOCK","start":18842,"end":18933,"inode":{"change":7,"pos":98}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":7,"pos":1260},"to":{"change":7,"start":1260,"end":1335},"introduced_by":7}],"inode":{"change":7,"pos":98}},"ins_contents":[{"Add":" love.graphics.circle('line', Drawing.pixels(p.x)+16,Drawing.pixels(p.y)+line.y, 4)"}],"del_contents":[{"Del":" love.graphics.circle('line', pixels(p.x)+16,pixels(p.y)+line.y, 4)\n"}]}},{"Replacement":{"inode":{"change":7,"pos":98},"path":"drawing.lua","line":45,"ins":{"up_context":[{"change":7,"pos":1384}],"down_context":[{"change":7,"pos":1459}],"flag":"BLOCK","start":18934,"end":19025,"inode":{"change":7,"pos":98}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":7,"pos":1384},"to":{"change":7,"start":1384,"end":1459},"introduced_by":7}],"inode":{"change":7,"pos":98}},"ins_contents":[{"Add":" love.graphics.circle('fill', Drawing.pixels(p.x)+16,Drawing.pixels(p.y)+line.y, 2)"}],"del_contents":[{"Del":" love.graphics.circle('fill', pixels(p.x)+16,pixels(p.y)+line.y, 2)\n"}]}},{"Replacement":{"inode":{"change":7,"pos":98},"path":"drawing.lua","line":49,"ins":{"up_context":[{"change":7,"pos":1483}],"down_context":[{"change":7,"pos":1521}],"flag":"BLOCK","start":19026,"end":27620,"inode":{"change":7,"pos":98}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":7,"pos":1483},"to":{"change":7,"start":1483,"end":1521},"introduced_by":7}],"inode":{"change":7,"pos":98}},"ins_contents":[{"Add":" Drawing.draw_pending_shape(16,line.y, line)"},{"Add":"end"},{"Add":""},{"Add":"function Drawing.current_drawing()"},{"Add":" local x, y = love.mouse.getX(), love.mouse.getY()"},{"Add":" for _,drawing in ipairs(Lines) do"},{"Add":" if drawing.mode == 'drawing' then"},{"Add":" if y >= drawing.y and y < drawing.y + Drawing.pixels(drawing.h) and x >= 16 and x < 16+Drawing_width then"},{"Add":" return drawing"},{"Add":" end"},{"Add":" end"},{"Add":" end"},{"Add":" return nil"},{"Add":"end"},{"Add":""},{"Add":"function Drawing.select_shape_at_mouse()"},{"Add":" for _,drawing in ipairs(Lines) do"},{"Add":" if drawing.mode == 'drawing' then"},{"Add":" local x, y = love.mouse.getX(), love.mouse.getY()"},{"Add":" if y >= drawing.y and y < drawing.y + Drawing.pixels(drawing.h) and x >= 16 and x < 16+Drawing_width then"},{"Add":" local mx,my = Drawing.coord(love.mouse.getX()-16), Drawing.coord(love.mouse.getY()-drawing.y)"},{"Add":" for i,shape in ipairs(drawing.shapes) do"},{"Add":" assert(shape)"},{"Add":" if geom.on_shape(mx,my, drawing, shape) then"},{"Add":" return drawing,i,shape"},{"Add":" end"},{"Add":" end"},{"Add":" end"},{"Add":" end"},{"Add":" end"},{"Add":"end"},{"Add":""},{"Add":"function Drawing.select_point_at_mouse()"},{"Add":" for _,drawing in ipairs(Lines) do"},{"Add":" if drawing.mode == 'drawing' then"},{"Add":" local x, y = love.mouse.getX(), love.mouse.getY()"},{"Add":" if y >= drawing.y and y < drawing.y + Drawing.pixels(drawing.h) and x >= 16 and x < 16+Drawing_width then"},{"Add":" local mx,my = Drawing.coord(love.mouse.getX()-16), Drawing.coord(love.mouse.getY()-drawing.y)"},{"Add":" for i,point in ipairs(drawing.points) do"},{"Add":" assert(point)"},{"Add":" if Drawing.near(point, mx,my) then"},{"Add":" return drawing,i,point"},{"Add":" end"},{"Add":" end"},{"Add":" end"},{"Add":" end"},{"Add":" end"},{"Add":"end"},{"Add":""},{"Add":"function Drawing.select_drawing_at_mouse()"},{"Add":" for _,drawing in ipairs(Lines) do"},{"Add":" if drawing.mode == 'drawing' then"},{"Add":" local x, y = love.mouse.getX(), love.mouse.getY()"},{"Add":" if y >= drawing.y and y < drawing.y + Drawing.pixels(drawing.h) and x >= 16 and x < 16+Drawing_width then"},{"Add":" return drawing"},{"Add":" end"},{"Add":" end"},{"Add":" end"},{"Add":"end"},{"Add":""},{"Add":"function Drawing.contains_point(shape, p)"},{"Add":" if shape.mode == 'freehand' then"},{"Add":" -- not supported"},{"Add":" elseif shape.mode == 'line' or shape.mode == 'manhattan' then"},{"Add":" return shape.p1 == p or shape.p2 == p"},{"Add":" elseif shape.mode == 'polygon' then"},{"Add":" return table.find(shape.vertices, p)"},{"Add":" elseif shape.mode == 'circle' then"},{"Add":" return shape.center == p"},{"Add":" elseif shape.mode == 'arc' then"},{"Add":" return shape.center == p"},{"Add":" -- ugh, how to support angles"},{"Add":" elseif shape.mode == 'deleted' then"},{"Add":" -- already done"},{"Add":" else"},{"Add":" print(shape.mode)"},{"Add":" assert(false)"},{"Add":" end"},{"Add":"end"},{"Add":""},{"Add":"function Drawing.convert_line(drawing, shape)"},{"Add":" -- Perhaps we should do a more sophisticated \"simple linear regression\""},{"Add":" -- here:"},{"Add":" -- https://en.wikipedia.org/wiki/Linear_regression#Simple_and_multiple_linear_regression"},{"Add":" -- But this works well enough for close-to-linear strokes."},{"Add":" assert(shape.mode == 'freehand')"},{"Add":" shape.mode = 'line'"},{"Add":" shape.p1 = insert_point(drawing.points, shape.points[1].x, shape.points[1].y)"},{"Add":" local n = #shape.points"},{"Add":" shape.p2 = insert_point(drawing.points, shape.points[n].x, shape.points[n].y)"},{"Add":"end"},{"Add":""},{"Add":"-- turn a line either horizontal or vertical"},{"Add":"function Drawing.convert_horvert(drawing, shape)"},{"Add":" if shape.mode == 'freehand' then"},{"Add":" convert_line(shape)"},{"Add":" end"},{"Add":" assert(shape.mode == 'line')"},{"Add":" local p1 = drawing.points[shape.p1]"},{"Add":" local p2 = drawing.points[shape.p2]"},{"Add":" if math.abs(p1.x-p2.x) > math.abs(p1.y-p2.y) then"},{"Add":" p2.y = p1.y"},{"Add":" else"},{"Add":" p2.x = p1.x"},{"Add":" end"},{"Add":"end"},{"Add":""},{"Add":"function Drawing.smoothen(shape)"},{"Add":" assert(shape.mode == 'freehand')"},{"Add":" for _=1,7 do"},{"Add":" for i=2,#shape.points-1 do"},{"Add":" local a = shape.points[i-1]"},{"Add":" local b = shape.points[i]"},{"Add":" local c = shape.points[i+1]"},{"Add":" b.x = (a.x + b.x + c.x)/3"},{"Add":" b.y = (a.y + b.y + c.y)/3"},{"Add":" end"},{"Add":" end"},{"Add":"end"},{"Add":""},{"Add":"function Drawing.insert_point(points, x,y)"},{"Add":" for i,point in ipairs(points) do"},{"Add":" if Drawing.near(point, x,y) then"},{"Add":" return i"},{"Add":" end"},{"Add":" end"},{"Add":" table.insert(points, {x=x, y=y})"},{"Add":" return #points"},{"Add":"end"},{"Add":""},{"Add":"function Drawing.near(point, x,y)"},{"Add":" local px,py = Drawing.pixels(x),Drawing.pixels(y)"},{"Add":" local cx,cy = Drawing.pixels(point.x), Drawing.pixels(point.y)"},{"Add":" return (cx-px)*(cx-px) + (cy-py)*(cy-py) < 16"},{"Add":"end"},{"Add":""},{"Add":"function Drawing.draw_shape(left,top, drawing, shape)"},{"Add":" if shape.mode == 'freehand' then"},{"Add":" local prev = nil"},{"Add":" for _,point in ipairs(shape.points) do"},{"Add":" if prev then"},{"Add":" love.graphics.line(Drawing.pixels(prev.x)+left,Drawing.pixels(prev.y)+top, Drawing.pixels(point.x)+left,Drawing.pixels(point.y)+top)"},{"Add":" end"},{"Add":" prev = point"},{"Add":" end"},{"Add":" elseif shape.mode == 'line' or shape.mode == 'manhattan' then"},{"Add":" local p1 = drawing.points[shape.p1]"},{"Add":" local p2 = drawing.points[shape.p2]"},{"Add":" love.graphics.line(Drawing.pixels(p1.x)+left,Drawing.pixels(p1.y)+top, Drawing.pixels(p2.x)+left,Drawing.pixels(p2.y)+top)"},{"Add":" elseif shape.mode == 'polygon' then"},{"Add":" local prev = nil"},{"Add":" for _,point in ipairs(shape.vertices) do"},{"Add":" local curr = drawing.points[point]"},{"Add":" if prev then"},{"Add":" love.graphics.line(Drawing.pixels(prev.x)+left,Drawing.pixels(prev.y)+top, Drawing.pixels(curr.x)+left,Drawing.pixels(curr.y)+top)"},{"Add":" end"},{"Add":" prev = curr"},{"Add":" end"},{"Add":" -- close the loop"},{"Add":" local curr = drawing.points[shape.vertices[1]]"},{"Add":" love.graphics.line(Drawing.pixels(prev.x)+left,Drawing.pixels(prev.y)+top, Drawing.pixels(curr.x)+left,Drawing.pixels(curr.y)+top)"},{"Add":" elseif shape.mode == 'circle' then"},{"Add":" local center = drawing.points[shape.center]"},{"Add":" love.graphics.circle('line', Drawing.pixels(center.x)+left,Drawing.pixels(center.y)+top, Drawing.pixels(shape.radius))"},{"Add":" elseif shape.mode == 'arc' then"},{"Add":" local center = drawing.points[shape.center]"},{"Add":" love.graphics.arc('line', 'open', Drawing.pixels(center.x)+left,Drawing.pixels(center.y)+top, Drawing.pixels(shape.radius), shape.start_angle, shape.end_angle, 360)"},{"Add":" elseif shape.mode == 'deleted' then"},{"Add":" else"},{"Add":" print(shape.mode)"},{"Add":" assert(false)"},{"Add":" end"},{"Add":"end"},{"Add":""},{"Add":"function Drawing.draw_pending_shape(left,top, drawing)"},{"Add":" local shape = drawing.pending"},{"Add":" if shape.mode == 'freehand' then"},{"Add":" draw_shape(left,top, drawing, shape)"},{"Add":" elseif shape.mode == 'line' then"},{"Add":" local p1 = drawing.points[shape.p1]"},{"Add":" local mx,my = Drawing.coord(love.mouse.getX()-16), Drawing.coord(love.mouse.getY()-drawing.y)"},{"Add":" if mx < 0 or mx >= 256 or my < 0 or my >= drawing.h then"},{"Add":" return"},{"Add":" end"},{"Add":" love.graphics.line(Drawing.pixels(p1.x)+left,Drawing.pixels(p1.y)+top, Drawing.pixels(mx)+left,Drawing.pixels(my)+top)"},{"Add":" elseif shape.mode == 'manhattan' then"},{"Add":" local p1 = drawing.points[shape.p1]"},{"Add":" local mx,my = Drawing.coord(love.mouse.getX()-16), Drawing.coord(love.mouse.getY()-drawing.y)"},{"Add":" if mx < 0 or mx >= 256 or my < 0 or my >= drawing.h then"},{"Add":" return"},{"Add":" end"},{"Add":" if math.abs(mx-p1.x) > math.abs(my-p1.y) then"},{"Add":" love.graphics.line(Drawing.pixels(p1.x)+left,Drawing.pixels(p1.y)+top, Drawing.pixels(mx)+left,Drawing.pixels(p1.y)+top)"},{"Add":" else"},{"Add":" love.graphics.line(Drawing.pixels(p1.x)+left,Drawing.pixels(p1.y)+top, Drawing.pixels(p1.x)+left,Drawing.pixels(my)+top)"},{"Add":" end"},{"Add":" elseif shape.mode == 'polygon' then"},{"Add":" -- don't close the loop on a pending polygon"},{"Add":" local prev = nil"},{"Add":" for _,point in ipairs(shape.vertices) do"},{"Add":" local curr = drawing.points[point]"},{"Add":" if prev then"},{"Add":" love.graphics.line(Drawing.pixels(prev.x)+left,Drawing.pixels(prev.y)+top, Drawing.pixels(curr.x)+left,Drawing.pixels(curr.y)+top)"},{"Add":" end"},{"Add":" prev = curr"},{"Add":" end"},{"Add":" love.graphics.line(Drawing.pixels(prev.x)+left,Drawing.pixels(prev.y)+top, love.mouse.getX(),love.mouse.getY())"},{"Add":" elseif shape.mode == 'circle' then"},{"Add":" local center = drawing.points[shape.center]"},{"Add":" local mx,my = Drawing.coord(love.mouse.getX()-16), Drawing.coord(love.mouse.getY()-drawing.y)"},{"Add":" if mx < 0 or mx >= 256 or my < 0 or my >= drawing.h then"},{"Add":" return"},{"Add":" end"},{"Add":" local cx,cy = Drawing.pixels(center.x)+left, Drawing.pixels(center.y)+top"},{"Add":" love.graphics.circle('line', cx,cy, math.dist(cx,cy, love.mouse.getX(),love.mouse.getY()))"},{"Add":" elseif shape.mode == 'arc' then"},{"Add":" local center = drawing.points[shape.center]"},{"Add":" local mx,my = Drawing.coord(love.mouse.getX()-16), Drawing.coord(love.mouse.getY()-drawing.y)"},{"Add":" if mx < 0 or mx >= 256 or my < 0 or my >= drawing.h then"},{"Add":" return"},{"Add":" end"},{"Add":" shape.end_angle = geom.angle_with_hint(center.x,center.y, mx,my, shape.end_angle)"},{"Add":" local cx,cy = Drawing.pixels(center.x)+left, Drawing.pixels(center.y)+top"},{"Add":" love.graphics.arc('line', 'open', cx,cy, Drawing.pixels(shape.radius), shape.start_angle, shape.end_angle, 360)"},{"Add":" end"},{"Add":"end"},{"Add":""},{"Add":"function Drawing.pixels(n) -- parts to pixels"},{"Add":" return n*Drawing_width/256"},{"Add":"end"},{"Add":"function Drawing.coord(n) -- pixels to parts"},{"Add":" return math.floor(n*256/Drawing_width)"}],"del_contents":[{"Del":" draw_pending_shape(16,line.y, line)\n"}]}}],"owner":"akkartik","repo":"sum-grid.love","token":"oILwyUDG2jzn3Q3NHFCvr7EsWsCi/yBAvcI6XWzTj10=","login":null}

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