store device-independent coordinates inside drawings

Dependencies

• [2] L5USRTY2 inline
• [3] MNWHXPBL more lightweight; select just the stroke at the mouse
• [4] 3XD6M3CF refactor
• [5] 2C7CTIQY make space for multiple kinds of width
• [6] YHQC72JX slightly tweak boundary between concerns
• [7] EFMLTMZG bugfix: restrict strokes to the drawing they started in
• [8] POT3XFCT rename
• [9] G77XIN7M selecting a stroke
• [10] WAZVXUV2 simplest possible way to straighten strokes
• [11] R3WSFYGY spacing
• [12] OTIBCAUJ love2d scaffold
• [13] T76KKDWZ turn strokes into horizontal and vertical lines
• [14] Z2CJVAPV lighter border for figures
• [15] XX7G2FFJ intermingle freehand line drawings with text
• [16] TRCAEE2A clip drawings inside the border
• [*] IZZVOCLB confirm that we have access to all of the love API

Change contents

• edit in main.lua at line 8
  [5.45]

  [18.2]
  +

  + -- All drawings span 100% of some conceptual 'page width' and divide it up

  + -- into 256 parts. `drawingw` describes their width in pixels.

  + drawingw = 400 -- pixels

  + function pixels(n) -- parts to pixels

  + return n*drawingw/256

  + end

  + function coord(n) -- pixels to parts

  + return math.floor(n*256/drawingw)

  + end

  +
• replacement in main.lua at line 48
  [7.500]→[7.500:588](∅→∅)
  − table.insert(lines, i, {y=y, w=400, h=200, pending={}, shapes={}})
  [7.500]

  [7.588]
  + table.insert(lines, i, {y=y, h=256/2, pending={}, shapes={}})
• replacement in main.lua at line 54
  [7.785]→[7.785:804](∅→∅),[7.804]→[6.3:67](∅→∅)
  − y = y+line.h

  − love.graphics.rectangle('line', 12,line.y, line.w,line.h)
  [7.726]

  [7.804]
  + y = y+pixels(line.h)

  + love.graphics.rectangle('line', 12,line.y, drawingw,pixels(line.h))

  +

  + local mx,my = coord(love.mouse.getX()-12), coord(love.mouse.getY()-line.y)
• replacement in main.lua at line 60
  [7.849]→[3.3:75](∅→∅)
  − if on_freehand(love.mouse.getX(),love.mouse.getY(), shape) then
  [7.849]

  [7.45]
  + if on_freehand(mx,my, shape) then
• replacement in main.lua at line 68
  [7.931]→[7.931:994](∅→∅)
  − love.graphics.line(prev.x,prev.y, point.x,point.y)
  [7.931]

  [7.994]
  + love.graphics.line(pixels(prev.x)+12,pixels(prev.y)+line.y, pixels(point.x)+12,pixels(point.y)+line.y)
• replacement in main.lua at line 76
  [7.1136]→[7.1136:1197](∅→∅)
  − love.graphics.line(prev.x,prev.y, point.x,point.y)
  [7.1136]

  [7.1197]
  + love.graphics.line(pixels(prev.x)+12,pixels(prev.y)+line.y, pixels(point.x)+12,pixels(point.y)+line.y)
• replacement in main.lua at line 99
  [7.60]→[7.33:127](∅→∅),[7.161]→[2.3:87](∅→∅)
  − if y >= drawing.y and y < drawing.y + drawing.h and x >= 12 and x < 12+drawing.w then

  − table.insert(drawing.pending, {x=love.mouse.getX(), y=love.mouse.getY()})
  [7.60]

  [7.1647]
  + if y >= drawing.y and y < drawing.y + pixels(drawing.h) and x >= 12 and x < 12+drawingw then

  + table.insert(drawing.pending, {x=coord(love.mouse.getX()-12), y=coord(love.mouse.getY()-drawing.y)})
• replacement in main.lua at line 116
  [7.316]→[7.316:408](∅→∅)
  − if y >= drawing.y and y < drawing.y + drawing.h and x >= 12 and x < 12+drawing.w then
  [7.316]

  [7.408]
  + if y >= drawing.y and y < drawing.y + pixels(drawing.h) and x >= 12 and x < 12+drawingw then
• replacement in main.lua at line 207
  [4.292]→[4.292:384](∅→∅)
  − if y >= drawing.y and y < drawing.y + drawing.h and x >= 12 and x < 12+drawing.w then
  [4.292]

  [4.384]
  + if y >= drawing.y and y < drawing.y + pixels(drawing.h) and x >= 12 and x < 12+drawingw then

  + local mx,my = coord(love.mouse.getX()-12), coord(love.mouse.getY()-drawing.y)
• replacement in main.lua at line 210
  [4.433]→[4.433:507](∅→∅)
  − if on_freehand(love.mouse.getX(),love.mouse.getY(), shape) then
  [4.433]

  [4.507]
  + if on_freehand(mx,my, shape) then