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text.love
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store device-independent coordinates inside drawings

This commit is contained in:
Kartik K. Agaram 2022-05-12 08:29:57 -07:00
parent 2e0929fab4
commit 79bbda9e48
1 changed files with 25 additions and 11 deletions
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36
main.lua
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@ -5,6 +5,17 @@ local utf8 = require 'utf8'
lines = {}
screenw, screenh, screenflags = 0, 0, nil
-- 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
exec_payload = nil
function love.load()
@ -34,17 +45,19 @@ function love.draw()
love.graphics.setColor(0, 0, 0)
end,
onpress1 = function()
table.insert(lines, i, {y=y, w=400, h=200, pending={}, shapes={}})
table.insert(lines, i, {y=y, h=256/2, pending={}, shapes={}})
end})
elseif type(line) == 'table' then
-- line drawing
love.graphics.setColor(0.75,0.75,0.75)
line.y = y
y = y+line.h
love.graphics.rectangle('line', 12,line.y, line.w,line.h)
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)
for _,shape in ipairs(line.shapes) do
if on_freehand(love.mouse.getX(),love.mouse.getY(), shape) then
if on_freehand(mx,my, shape) then
love.graphics.setColor(1,0,0)
else
love.graphics.setColor(0,0,0)
@ -52,7 +65,7 @@ function love.draw()
prev = nil
for _,point in ipairs(shape) do
if prev then
love.graphics.line(prev.x,prev.y, point.x,point.y)
love.graphics.line(pixels(prev.x)+12,pixels(prev.y)+line.y, pixels(point.x)+12,pixels(point.y)+line.y)
end
prev = point
end
@ -60,7 +73,7 @@ function love.draw()
prev = nil
for _,point in ipairs(line.pending) do
if prev then
love.graphics.line(prev.x,prev.y, point.x,point.y)
love.graphics.line(pixels(prev.x)+12,pixels(prev.y)+line.y, pixels(point.x)+12,pixels(point.y)+line.y)
end
prev = point
end
@ -83,8 +96,8 @@ function love.update(dt)
local drawing = lines.current
if type(drawing) == 'table' then
local x, y = love.mouse.getX(), love.mouse.getY()
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()})
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)})
end
end
end
@ -100,7 +113,7 @@ function propagate_to_drawings(x,y, button)
for i,drawing in ipairs(lines) do
if type(drawing) == 'table' then
local x, y = love.mouse.getX(), love.mouse.getY()
if y >= drawing.y and y < drawing.y + drawing.h and x >= 12 and x < 12+drawing.w then
if y >= drawing.y and y < drawing.y + pixels(drawing.h) and x >= 12 and x < 12+drawingw then
lines.current = drawing
end
end
@ -191,9 +204,10 @@ function select_shape_at_mouse()
for _,drawing in ipairs(lines) do
if type(drawing) == 'table' then
local x, y = love.mouse.getX(), love.mouse.getY()
if y >= drawing.y and y < drawing.y + drawing.h and x >= 12 and x < 12+drawing.w then
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)
for i,shape in ipairs(drawing.shapes) do
if on_freehand(love.mouse.getX(),love.mouse.getY(), shape) then
if on_freehand(mx,my, shape) then
return drawing,i,shape
end
end