747 lines
32 KiB
Lua
747 lines
32 KiB
Lua
-- primitives for editing drawings
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Drawing = {}
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require 'drawing_tests'
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-- All drawings span 100% of some conceptual 'page width' and divide it up
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-- into 256 parts.
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function Drawing.draw(State, line_index, y)
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local line = State.lines[line_index]
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local line_cache = State.line_cache[line_index]
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line_cache.starty = y
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local pmx,pmy = App.mouse_x(), App.mouse_y()
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if pmx < State.right and pmy > line_cache.starty and pmy < line_cache.starty+Drawing.pixels(line.h, State.width) then
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App.color(Icon_color)
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love.graphics.rectangle('line', State.left,line_cache.starty, State.width,Drawing.pixels(line.h, State.width))
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if icon[State.current_drawing_mode] then
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icon[State.current_drawing_mode](State.right-22, line_cache.starty+4)
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else
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icon[State.previous_drawing_mode](State.right-22, line_cache.starty+4)
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end
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if App.mouse_down(1) and love.keyboard.isDown('h') then
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draw_help_with_mouse_pressed(State, line_index)
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return
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end
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end
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if line.show_help then
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draw_help_without_mouse_pressed(State, line_index)
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return
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end
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local mx = Drawing.coord(pmx-State.left, State.width)
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local my = Drawing.coord(pmy-line_cache.starty, State.width)
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for _,shape in ipairs(line.shapes) do
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assert(shape)
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if geom.on_shape(mx,my, line, shape) then
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App.color(Focus_stroke_color)
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else
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App.color(Stroke_color)
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end
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Drawing.draw_shape(line, shape, line_cache.starty, State.left,State.right)
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end
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local function px(x) return Drawing.pixels(x, State.width)+State.left end
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local function py(y) return Drawing.pixels(y, State.width)+line_cache.starty end
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for i,p in ipairs(line.points) do
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if p.deleted == nil then
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if Drawing.near(p, mx,my, State.width) then
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App.color(Focus_stroke_color)
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love.graphics.circle('line', px(p.x),py(p.y), Same_point_distance)
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else
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App.color(Stroke_color)
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love.graphics.circle('fill', px(p.x),py(p.y), 2)
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end
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if p.name then
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-- TODO: clip
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local x,y = px(p.x)+5, py(p.y)+5
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love.graphics.print(p.name, x,y)
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if State.current_drawing_mode == 'name' and i == line.pending.target_point then
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-- create a faint red box for the name
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App.color(Current_name_background_color)
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local name_text
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-- TODO: avoid computing name width on every repaint
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if p.name == '' then
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name_text = State.em
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else
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name_text = App.newText(love.graphics.getFont(), p.name)
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end
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love.graphics.rectangle('fill', x,y, App.width(name_text), State.line_height)
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end
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end
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end
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end
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App.color(Current_stroke_color)
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Drawing.draw_pending_shape(line, line_cache.starty, State.left,State.right)
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line.top = line_cache.starty+Drawing.pixels(line.h, State.width)
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end
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function Drawing.draw_shape(drawing, shape, top, left,right)
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local width = right-left
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local function px(x) return Drawing.pixels(x, width)+left end
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local function py(y) return Drawing.pixels(y, width)+top end
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if shape.mode == 'freehand' then
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local prev = nil
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for _,point in ipairs(shape.points) do
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if prev then
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love.graphics.line(px(prev.x),py(prev.y), px(point.x),py(point.y))
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end
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prev = point
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end
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elseif shape.mode == 'line' or shape.mode == 'manhattan' then
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local p1 = drawing.points[shape.p1]
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local p2 = drawing.points[shape.p2]
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love.graphics.line(px(p1.x),py(p1.y), px(p2.x),py(p2.y))
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elseif shape.mode == 'polygon' or shape.mode == 'rectangle' or shape.mode == 'square' then
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local prev = nil
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for _,point in ipairs(shape.vertices) do
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local curr = drawing.points[point]
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if prev then
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love.graphics.line(px(prev.x),py(prev.y), px(curr.x),py(curr.y))
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end
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prev = curr
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end
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-- close the loop
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local curr = drawing.points[shape.vertices[1]]
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love.graphics.line(px(prev.x),py(prev.y), px(curr.x),py(curr.y))
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elseif shape.mode == 'circle' then
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-- TODO: clip
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local center = drawing.points[shape.center]
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love.graphics.circle('line', px(center.x),py(center.y), Drawing.pixels(shape.radius, width))
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elseif shape.mode == 'arc' then
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local center = drawing.points[shape.center]
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love.graphics.arc('line', 'open', px(center.x),py(center.y), Drawing.pixels(shape.radius, width), shape.start_angle, shape.end_angle, 360)
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elseif shape.mode == 'deleted' then
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-- ignore
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else
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print(shape.mode)
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assert(false)
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end
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end
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function Drawing.draw_pending_shape(drawing, top, left,right)
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local width = right-left
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local pmx,pmy = App.mouse_x(), App.mouse_y()
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local function px(x) return Drawing.pixels(x, width)+left end
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local function py(y) return Drawing.pixels(y, width)+top end
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local mx = Drawing.coord(pmx-left, width)
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local my = Drawing.coord(pmy-top, width)
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-- recreate pixels from coords to precisely mimic how the drawing will look
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-- after mouse_released
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pmx,pmy = px(mx), py(my)
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local shape = drawing.pending
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if shape.mode == nil then
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-- nothing pending
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elseif shape.mode == 'freehand' then
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local shape_copy = deepcopy(shape)
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Drawing.smoothen(shape_copy)
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Drawing.draw_shape(drawing, shape_copy, top, left,right)
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elseif shape.mode == 'line' then
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if mx < 0 or mx >= 256 or my < 0 or my >= drawing.h then
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return
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end
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local p1 = drawing.points[shape.p1]
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love.graphics.line(px(p1.x),py(p1.y), pmx,pmy)
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elseif shape.mode == 'manhattan' then
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if mx < 0 or mx >= 256 or my < 0 or my >= drawing.h then
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return
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end
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local p1 = drawing.points[shape.p1]
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if math.abs(mx-p1.x) > math.abs(my-p1.y) then
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love.graphics.line(px(p1.x),py(p1.y), pmx, py(p1.y))
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else
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love.graphics.line(px(p1.x),py(p1.y), px(p1.x),pmy)
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end
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elseif shape.mode == 'polygon' then
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-- don't close the loop on a pending polygon
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local prev = nil
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for _,point in ipairs(shape.vertices) do
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local curr = drawing.points[point]
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if prev then
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love.graphics.line(px(prev.x),py(prev.y), px(curr.x),py(curr.y))
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end
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prev = curr
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end
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love.graphics.line(px(prev.x),py(prev.y), pmx,pmy)
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elseif shape.mode == 'rectangle' then
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local first = drawing.points[shape.vertices[1]]
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if #shape.vertices == 1 then
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love.graphics.line(px(first.x),py(first.y), pmx,pmy)
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return
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end
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local second = drawing.points[shape.vertices[2]]
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local thirdx,thirdy, fourthx,fourthy = Drawing.complete_rectangle(first.x,first.y, second.x,second.y, mx,my)
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love.graphics.line(px(first.x),py(first.y), px(second.x),py(second.y))
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love.graphics.line(px(second.x),py(second.y), px(thirdx),py(thirdy))
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love.graphics.line(px(thirdx),py(thirdy), px(fourthx),py(fourthy))
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love.graphics.line(px(fourthx),py(fourthy), px(first.x),py(first.y))
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elseif shape.mode == 'square' then
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local first = drawing.points[shape.vertices[1]]
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if #shape.vertices == 1 then
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love.graphics.line(px(first.x),py(first.y), pmx,pmy)
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return
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end
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local second = drawing.points[shape.vertices[2]]
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local thirdx,thirdy, fourthx,fourthy = Drawing.complete_square(first.x,first.y, second.x,second.y, mx,my)
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love.graphics.line(px(first.x),py(first.y), px(second.x),py(second.y))
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love.graphics.line(px(second.x),py(second.y), px(thirdx),py(thirdy))
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love.graphics.line(px(thirdx),py(thirdy), px(fourthx),py(fourthy))
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love.graphics.line(px(fourthx),py(fourthy), px(first.x),py(first.y))
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elseif shape.mode == 'circle' then
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local center = drawing.points[shape.center]
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if mx < 0 or mx >= 256 or my < 0 or my >= drawing.h then
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return
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end
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local cx,cy = px(center.x), py(center.y)
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love.graphics.circle('line', cx,cy, geom.dist(cx,cy, App.mouse_x(),App.mouse_y()))
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elseif shape.mode == 'arc' then
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local center = drawing.points[shape.center]
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if mx < 0 or mx >= 256 or my < 0 or my >= drawing.h then
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return
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end
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shape.end_angle = geom.angle_with_hint(center.x,center.y, mx,my, shape.end_angle)
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local cx,cy = px(center.x), py(center.y)
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love.graphics.arc('line', 'open', cx,cy, Drawing.pixels(shape.radius, width), shape.start_angle, shape.end_angle, 360)
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elseif shape.mode == 'move' then
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-- nothing pending; changes are immediately committed
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elseif shape.mode == 'name' then
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-- nothing pending; changes are immediately committed
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else
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print(shape.mode)
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assert(false)
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end
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end
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function Drawing.in_drawing(drawing, line_cache, x,y, left,right)
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if line_cache.starty == nil then return false end -- outside current page
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local width = right-left
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return y >= line_cache.starty and y < line_cache.starty + Drawing.pixels(drawing.h, width) and x >= left and x < right
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end
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function Drawing.mouse_pressed(State, drawing_index, x,y, mouse_button)
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local drawing = State.lines[drawing_index]
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local line_cache = State.line_cache[drawing_index]
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local cx = Drawing.coord(x-State.left, State.width)
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local cy = Drawing.coord(y-line_cache.starty, State.width)
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if State.current_drawing_mode == 'freehand' then
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drawing.pending = {mode=State.current_drawing_mode, points={{x=cx, y=cy}}}
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elseif State.current_drawing_mode == 'line' or State.current_drawing_mode == 'manhattan' then
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local j = Drawing.find_or_insert_point(drawing.points, cx, cy, State.width)
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drawing.pending = {mode=State.current_drawing_mode, p1=j}
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elseif State.current_drawing_mode == 'polygon' or State.current_drawing_mode == 'rectangle' or State.current_drawing_mode == 'square' then
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local j = Drawing.find_or_insert_point(drawing.points, cx, cy, State.width)
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drawing.pending = {mode=State.current_drawing_mode, vertices={j}}
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elseif State.current_drawing_mode == 'circle' then
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local j = Drawing.find_or_insert_point(drawing.points, cx, cy, State.width)
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drawing.pending = {mode=State.current_drawing_mode, center=j}
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elseif State.current_drawing_mode == 'move' then
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-- all the action is in mouse_released
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elseif State.current_drawing_mode == 'name' then
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-- nothing
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else
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print(State.current_drawing_mode)
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assert(false)
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end
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end
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-- a couple of operations on drawings need to constantly check the state of the mouse
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function Drawing.update(State)
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if State.lines.current_drawing == nil then return end
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local drawing = State.lines.current_drawing
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local line_cache = State.line_cache[State.lines.current_drawing_index]
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assert(drawing.mode == 'drawing')
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local pmx, pmy = App.mouse_x(), App.mouse_y()
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local mx = Drawing.coord(pmx-State.left, State.width)
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local my = Drawing.coord(pmy-line_cache.starty, State.width)
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if App.mouse_down(1) then
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if Drawing.in_drawing(drawing, line_cache, pmx,pmy, State.left,State.right) then
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if drawing.pending.mode == 'freehand' then
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table.insert(drawing.pending.points, {x=mx, y=my})
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elseif drawing.pending.mode == 'move' then
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drawing.pending.target_point.x = mx
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drawing.pending.target_point.y = my
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Drawing.relax_constraints(drawing, drawing.pending.target_point_index)
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end
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end
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elseif State.current_drawing_mode == 'move' then
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if Drawing.in_drawing(drawing, line_cache, pmx, pmy, State.left,State.right) then
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drawing.pending.target_point.x = mx
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drawing.pending.target_point.y = my
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Drawing.relax_constraints(drawing, drawing.pending.target_point_index)
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end
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else
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-- do nothing
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end
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end
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function Drawing.relax_constraints(drawing, p)
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for _,shape in ipairs(drawing.shapes) do
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if shape.mode == 'manhattan' then
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if shape.p1 == p then
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shape.mode = 'line'
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elseif shape.p2 == p then
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shape.mode = 'line'
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end
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elseif shape.mode == 'rectangle' or shape.mode == 'square' then
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for _,v in ipairs(shape.vertices) do
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if v == p then
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shape.mode = 'polygon'
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end
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end
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end
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end
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end
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function Drawing.mouse_released(State, x,y, mouse_button)
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if State.current_drawing_mode == 'move' then
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State.current_drawing_mode = State.previous_drawing_mode
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State.previous_drawing_mode = nil
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if State.lines.current_drawing then
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State.lines.current_drawing.pending = {}
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State.lines.current_drawing = nil
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end
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elseif State.lines.current_drawing then
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local drawing = State.lines.current_drawing
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local line_cache = State.line_cache[State.lines.current_drawing_index]
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if drawing.pending then
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if drawing.pending.mode == nil then
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-- nothing pending
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elseif drawing.pending.mode == 'freehand' then
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-- the last point added during update is good enough
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Drawing.smoothen(drawing.pending)
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table.insert(drawing.shapes, drawing.pending)
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elseif drawing.pending.mode == 'line' then
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local mx,my = Drawing.coord(x-State.left, State.width), Drawing.coord(y-line_cache.starty, State.width)
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if mx >= 0 and mx < 256 and my >= 0 and my < drawing.h then
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drawing.pending.p2 = Drawing.find_or_insert_point(drawing.points, mx,my, State.width)
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table.insert(drawing.shapes, drawing.pending)
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end
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elseif drawing.pending.mode == 'manhattan' then
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local p1 = drawing.points[drawing.pending.p1]
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local mx,my = Drawing.coord(x-State.left, State.width), Drawing.coord(y-line_cache.starty, State.width)
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if mx >= 0 and mx < 256 and my >= 0 and my < drawing.h then
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if math.abs(mx-p1.x) > math.abs(my-p1.y) then
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drawing.pending.p2 = Drawing.find_or_insert_point(drawing.points, mx, p1.y, State.width)
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else
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drawing.pending.p2 = Drawing.find_or_insert_point(drawing.points, p1.x, my, State.width)
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end
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local p2 = drawing.points[drawing.pending.p2]
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App.mouse_move(State.left+Drawing.pixels(p2.x, State.width), line_cache.starty+Drawing.pixels(p2.y, State.width))
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table.insert(drawing.shapes, drawing.pending)
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end
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elseif drawing.pending.mode == 'polygon' then
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local mx,my = Drawing.coord(x-State.left, State.width), Drawing.coord(y-line_cache.starty, State.width)
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if mx >= 0 and mx < 256 and my >= 0 and my < drawing.h then
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table.insert(drawing.pending.vertices, Drawing.find_or_insert_point(drawing.points, mx,my, State.width))
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table.insert(drawing.shapes, drawing.pending)
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end
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elseif drawing.pending.mode == 'rectangle' then
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assert(#drawing.pending.vertices <= 2)
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if #drawing.pending.vertices == 2 then
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local mx,my = Drawing.coord(x-State.left, State.width), Drawing.coord(y-line_cache.starty, State.width)
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if mx >= 0 and mx < 256 and my >= 0 and my < drawing.h then
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local first = drawing.points[drawing.pending.vertices[1]]
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local second = drawing.points[drawing.pending.vertices[2]]
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local thirdx,thirdy, fourthx,fourthy = Drawing.complete_rectangle(first.x,first.y, second.x,second.y, mx,my)
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table.insert(drawing.pending.vertices, Drawing.find_or_insert_point(drawing.points, thirdx,thirdy, State.width))
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table.insert(drawing.pending.vertices, Drawing.find_or_insert_point(drawing.points, fourthx,fourthy, State.width))
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table.insert(drawing.shapes, drawing.pending)
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end
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else
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-- too few points; draw nothing
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end
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elseif drawing.pending.mode == 'square' then
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assert(#drawing.pending.vertices <= 2)
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if #drawing.pending.vertices == 2 then
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local mx,my = Drawing.coord(x-State.left, State.width), Drawing.coord(y-line_cache.starty, State.width)
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if mx >= 0 and mx < 256 and my >= 0 and my < drawing.h then
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local first = drawing.points[drawing.pending.vertices[1]]
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local second = drawing.points[drawing.pending.vertices[2]]
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local thirdx,thirdy, fourthx,fourthy = Drawing.complete_square(first.x,first.y, second.x,second.y, mx,my)
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table.insert(drawing.pending.vertices, Drawing.find_or_insert_point(drawing.points, thirdx,thirdy, State.width))
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table.insert(drawing.pending.vertices, Drawing.find_or_insert_point(drawing.points, fourthx,fourthy, State.width))
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table.insert(drawing.shapes, drawing.pending)
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end
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end
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elseif drawing.pending.mode == 'circle' then
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local mx,my = Drawing.coord(x-State.left, State.width), Drawing.coord(y-line_cache.starty, State.width)
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if mx >= 0 and mx < 256 and my >= 0 and my < drawing.h then
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local center = drawing.points[drawing.pending.center]
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drawing.pending.radius = round(geom.dist(center.x,center.y, mx,my))
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table.insert(drawing.shapes, drawing.pending)
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end
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elseif drawing.pending.mode == 'arc' then
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local mx,my = Drawing.coord(x-State.left, State.width), Drawing.coord(y-line_cache.starty, State.width)
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if mx >= 0 and mx < 256 and my >= 0 and my < drawing.h then
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local center = drawing.points[drawing.pending.center]
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drawing.pending.end_angle = geom.angle_with_hint(center.x,center.y, mx,my, drawing.pending.end_angle)
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table.insert(drawing.shapes, drawing.pending)
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end
|
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elseif drawing.pending.mode == 'name' then
|
|
-- drop it
|
|
else
|
|
print(drawing.pending.mode)
|
|
assert(false)
|
|
end
|
|
State.lines.current_drawing.pending = {}
|
|
State.lines.current_drawing = nil
|
|
end
|
|
end
|
|
end
|
|
|
|
function Drawing.keychord_pressed(State, chord)
|
|
if chord == 'C-p' and not App.mouse_down(1) then
|
|
State.current_drawing_mode = 'freehand'
|
|
elseif App.mouse_down(1) and chord == 'l' then
|
|
State.current_drawing_mode = 'line'
|
|
local _,drawing = Drawing.current_drawing(State)
|
|
if drawing.pending.mode == 'freehand' then
|
|
drawing.pending.p1 = Drawing.find_or_insert_point(drawing.points, drawing.pending.points[1].x, drawing.pending.points[1].y, State.width)
|
|
elseif drawing.pending.mode == 'polygon' or drawing.pending.mode == 'rectangle' or drawing.pending.mode == 'square' then
|
|
drawing.pending.p1 = drawing.pending.vertices[1]
|
|
elseif drawing.pending.mode == 'circle' or drawing.pending.mode == 'arc' then
|
|
drawing.pending.p1 = drawing.pending.center
|
|
end
|
|
drawing.pending.mode = 'line'
|
|
elseif chord == 'C-l' and not App.mouse_down(1) then
|
|
State.current_drawing_mode = 'line'
|
|
elseif App.mouse_down(1) and chord == 'm' then
|
|
State.current_drawing_mode = 'manhattan'
|
|
local drawing = Drawing.select_drawing_at_mouse(State)
|
|
if drawing.pending.mode == 'freehand' then
|
|
drawing.pending.p1 = Drawing.find_or_insert_point(drawing.points, drawing.pending.points[1].x, drawing.pending.points[1].y, State.width)
|
|
elseif drawing.pending.mode == 'line' then
|
|
-- do nothing
|
|
elseif drawing.pending.mode == 'polygon' or drawing.pending.mode == 'rectangle' or drawing.pending.mode == 'square' then
|
|
drawing.pending.p1 = drawing.pending.vertices[1]
|
|
elseif drawing.pending.mode == 'circle' or drawing.pending.mode == 'arc' then
|
|
drawing.pending.p1 = drawing.pending.center
|
|
end
|
|
drawing.pending.mode = 'manhattan'
|
|
elseif chord == 'C-m' and not App.mouse_down(1) then
|
|
State.current_drawing_mode = 'manhattan'
|
|
elseif chord == 'C-g' and not App.mouse_down(1) then
|
|
State.current_drawing_mode = 'polygon'
|
|
elseif App.mouse_down(1) and chord == 'g' then
|
|
State.current_drawing_mode = 'polygon'
|
|
local _,drawing = Drawing.current_drawing(State)
|
|
if drawing.pending.mode == 'freehand' then
|
|
drawing.pending.vertices = {Drawing.find_or_insert_point(drawing.points, drawing.pending.points[1].x, drawing.pending.points[1].y, State.width)}
|
|
elseif drawing.pending.mode == 'line' or drawing.pending.mode == 'manhattan' then
|
|
if drawing.pending.vertices == nil then
|
|
drawing.pending.vertices = {drawing.pending.p1}
|
|
end
|
|
elseif drawing.pending.mode == 'rectangle' or drawing.pending.mode == 'square' then
|
|
-- reuse existing vertices
|
|
elseif drawing.pending.mode == 'circle' or drawing.pending.mode == 'arc' then
|
|
drawing.pending.vertices = {drawing.pending.center}
|
|
end
|
|
drawing.pending.mode = 'polygon'
|
|
elseif chord == 'C-r' and not App.mouse_down(1) then
|
|
State.current_drawing_mode = 'rectangle'
|
|
elseif App.mouse_down(1) and chord == 'r' then
|
|
State.current_drawing_mode = 'rectangle'
|
|
local _,drawing = Drawing.current_drawing(State)
|
|
if drawing.pending.mode == 'freehand' then
|
|
drawing.pending.vertices = {Drawing.find_or_insert_point(drawing.points, drawing.pending.points[1].x, drawing.pending.points[1].y, State.width)}
|
|
elseif drawing.pending.mode == 'line' or drawing.pending.mode == 'manhattan' then
|
|
if drawing.pending.vertices == nil then
|
|
drawing.pending.vertices = {drawing.pending.p1}
|
|
end
|
|
elseif drawing.pending.mode == 'polygon' or drawing.pending.mode == 'square' then
|
|
-- reuse existing (1-2) vertices
|
|
elseif drawing.pending.mode == 'circle' or drawing.pending.mode == 'arc' then
|
|
drawing.pending.vertices = {drawing.pending.center}
|
|
end
|
|
drawing.pending.mode = 'rectangle'
|
|
elseif chord == 'C-s' and not App.mouse_down(1) then
|
|
State.current_drawing_mode = 'square'
|
|
elseif App.mouse_down(1) and chord == 's' then
|
|
State.current_drawing_mode = 'square'
|
|
local _,drawing = Drawing.current_drawing(State)
|
|
if drawing.pending.mode == 'freehand' then
|
|
drawing.pending.vertices = {Drawing.find_or_insert_point(drawing.points, drawing.pending.points[1].x, drawing.pending.points[1].y, State.width)}
|
|
elseif drawing.pending.mode == 'line' or drawing.pending.mode == 'manhattan' then
|
|
if drawing.pending.vertices == nil then
|
|
drawing.pending.vertices = {drawing.pending.p1}
|
|
end
|
|
elseif drawing.pending.mode == 'polygon' then
|
|
while #drawing.pending.vertices > 2 do
|
|
table.remove(drawing.pending.vertices)
|
|
end
|
|
elseif drawing.pending.mode == 'rectangle' then
|
|
-- reuse existing (1-2) vertices
|
|
elseif drawing.pending.mode == 'circle' or drawing.pending.mode == 'arc' then
|
|
drawing.pending.vertices = {drawing.pending.center}
|
|
end
|
|
drawing.pending.mode = 'square'
|
|
elseif App.mouse_down(1) and chord == 'p' and State.current_drawing_mode == 'polygon' then
|
|
local _,drawing,line_cache = Drawing.current_drawing(State)
|
|
local mx,my = Drawing.coord(App.mouse_x()-State.left, State.width), Drawing.coord(App.mouse_y()-line_cache.starty, State.width)
|
|
local j = Drawing.find_or_insert_point(drawing.points, mx,my, State.width)
|
|
table.insert(drawing.pending.vertices, j)
|
|
elseif App.mouse_down(1) and chord == 'p' and (State.current_drawing_mode == 'rectangle' or State.current_drawing_mode == 'square') then
|
|
local _,drawing,line_cache = Drawing.current_drawing(State)
|
|
local mx,my = Drawing.coord(App.mouse_x()-State.left, State.width), Drawing.coord(App.mouse_y()-line_cache.starty, State.width)
|
|
local j = Drawing.find_or_insert_point(drawing.points, mx,my, State.width)
|
|
while #drawing.pending.vertices >= 2 do
|
|
table.remove(drawing.pending.vertices)
|
|
end
|
|
table.insert(drawing.pending.vertices, j)
|
|
elseif chord == 'C-o' and not App.mouse_down(1) then
|
|
State.current_drawing_mode = 'circle'
|
|
elseif App.mouse_down(1) and chord == 'a' and State.current_drawing_mode == 'circle' then
|
|
local _,drawing,line_cache = Drawing.current_drawing(State)
|
|
drawing.pending.mode = 'arc'
|
|
local mx,my = Drawing.coord(App.mouse_x()-State.left, State.width), Drawing.coord(App.mouse_y()-line_cache.starty, State.width)
|
|
local center = drawing.points[drawing.pending.center]
|
|
drawing.pending.radius = round(geom.dist(center.x,center.y, mx,my))
|
|
drawing.pending.start_angle = geom.angle(center.x,center.y, mx,my)
|
|
elseif App.mouse_down(1) and chord == 'o' then
|
|
State.current_drawing_mode = 'circle'
|
|
local _,drawing = Drawing.current_drawing(State)
|
|
if drawing.pending.mode == 'freehand' then
|
|
drawing.pending.center = Drawing.find_or_insert_point(drawing.points, drawing.pending.points[1].x, drawing.pending.points[1].y, State.width)
|
|
elseif drawing.pending.mode == 'line' or drawing.pending.mode == 'manhattan' then
|
|
drawing.pending.center = drawing.pending.p1
|
|
elseif drawing.pending.mode == 'polygon' or drawing.pending.mode == 'rectangle' or drawing.pending.mode == 'square' then
|
|
drawing.pending.center = drawing.pending.vertices[1]
|
|
end
|
|
drawing.pending.mode = 'circle'
|
|
elseif chord == 'C-u' and not App.mouse_down(1) then
|
|
local drawing_index,drawing,line_cache,i,p = Drawing.select_point_at_mouse(State)
|
|
if drawing then
|
|
if State.previous_drawing_mode == nil then
|
|
State.previous_drawing_mode = State.current_drawing_mode
|
|
end
|
|
State.current_drawing_mode = 'move'
|
|
drawing.pending = {mode=State.current_drawing_mode, target_point=p, target_point_index=i}
|
|
State.lines.current_drawing_index = drawing_index
|
|
State.lines.current_drawing = drawing
|
|
end
|
|
elseif chord == 'C-n' and not App.mouse_down(1) then
|
|
local drawing_index,drawing,line_cache,point_index,p = Drawing.select_point_at_mouse(State)
|
|
if drawing then
|
|
if State.previous_drawing_mode == nil then
|
|
-- don't clobber
|
|
State.previous_drawing_mode = State.current_drawing_mode
|
|
end
|
|
State.current_drawing_mode = 'name'
|
|
p.name = ''
|
|
drawing.pending = {mode=State.current_drawing_mode, target_point=point_index}
|
|
State.lines.current_drawing_index = drawing_index
|
|
State.lines.current_drawing = drawing
|
|
end
|
|
elseif chord == 'C-d' and not App.mouse_down(1) then
|
|
local _,drawing,_,i,p = Drawing.select_point_at_mouse(State)
|
|
if drawing then
|
|
for _,shape in ipairs(drawing.shapes) do
|
|
if Drawing.contains_point(shape, i) then
|
|
if shape.mode == 'polygon' then
|
|
local idx = table.find(shape.vertices, i)
|
|
assert(idx)
|
|
table.remove(shape.vertices, idx)
|
|
if #shape.vertices < 3 then
|
|
shape.mode = 'deleted'
|
|
end
|
|
else
|
|
shape.mode = 'deleted'
|
|
end
|
|
end
|
|
end
|
|
drawing.points[i].deleted = true
|
|
end
|
|
local drawing,_,_,shape = Drawing.select_shape_at_mouse(State)
|
|
if drawing then
|
|
shape.mode = 'deleted'
|
|
end
|
|
elseif chord == 'C-h' and not App.mouse_down(1) then
|
|
local drawing = Drawing.select_drawing_at_mouse(State)
|
|
if drawing then
|
|
drawing.show_help = true
|
|
end
|
|
elseif chord == 'escape' and App.mouse_down(1) then
|
|
local _,drawing = Drawing.current_drawing(State)
|
|
drawing.pending = {}
|
|
end
|
|
end
|
|
|
|
function Drawing.complete_rectangle(firstx,firsty, secondx,secondy, x,y)
|
|
if firstx == secondx then
|
|
return x,secondy, x,firsty
|
|
end
|
|
if firsty == secondy then
|
|
return secondx,y, firstx,y
|
|
end
|
|
local first_slope = (secondy-firsty)/(secondx-firstx)
|
|
-- slope of second edge:
|
|
-- -1/first_slope
|
|
-- equation of line containing the second edge:
|
|
-- y-secondy = -1/first_slope*(x-secondx)
|
|
-- => 1/first_slope*x + y + (- secondy - secondx/first_slope) = 0
|
|
-- now we want to find the point on this line that's closest to the mouse pointer.
|
|
-- https://en.wikipedia.org/wiki/Distance_from_a_point_to_a_line#Line_defined_by_an_equation
|
|
local a = 1/first_slope
|
|
local c = -secondy - secondx/first_slope
|
|
local thirdx = round(((x-a*y) - a*c) / (a*a + 1))
|
|
local thirdy = round((a*(-x + a*y) - c) / (a*a + 1))
|
|
-- slope of third edge = first_slope
|
|
-- equation of line containing third edge:
|
|
-- y - thirdy = first_slope*(x-thirdx)
|
|
-- => -first_slope*x + y + (-thirdy + thirdx*first_slope) = 0
|
|
-- now we want to find the point on this line that's closest to the first point
|
|
local a = -first_slope
|
|
local c = -thirdy + thirdx*first_slope
|
|
local fourthx = round(((firstx-a*firsty) - a*c) / (a*a + 1))
|
|
local fourthy = round((a*(-firstx + a*firsty) - c) / (a*a + 1))
|
|
return thirdx,thirdy, fourthx,fourthy
|
|
end
|
|
|
|
function Drawing.complete_square(firstx,firsty, secondx,secondy, x,y)
|
|
-- use x,y only to decide which side of the first edge to complete the square on
|
|
local deltax = secondx-firstx
|
|
local deltay = secondy-firsty
|
|
local thirdx = secondx+deltay
|
|
local thirdy = secondy-deltax
|
|
if not geom.same_side(firstx,firsty, secondx,secondy, thirdx,thirdy, x,y) then
|
|
deltax = -deltax
|
|
deltay = -deltay
|
|
thirdx = secondx+deltay
|
|
thirdy = secondy-deltax
|
|
end
|
|
local fourthx = firstx+deltay
|
|
local fourthy = firsty-deltax
|
|
return thirdx,thirdy, fourthx,fourthy
|
|
end
|
|
|
|
function Drawing.current_drawing(State)
|
|
local x, y = App.mouse_x(), App.mouse_y()
|
|
for drawing_index,drawing in ipairs(State.lines) do
|
|
if drawing.mode == 'drawing' then
|
|
local line_cache = State.line_cache[drawing_index]
|
|
if Drawing.in_drawing(drawing, line_cache, x,y, State.left,State.right) then
|
|
return drawing_index,drawing,line_cache
|
|
end
|
|
end
|
|
end
|
|
return nil
|
|
end
|
|
|
|
function Drawing.select_shape_at_mouse(State)
|
|
for drawing_index,drawing in ipairs(State.lines) do
|
|
if drawing.mode == 'drawing' then
|
|
local x, y = App.mouse_x(), App.mouse_y()
|
|
local line_cache = State.line_cache[drawing_index]
|
|
if Drawing.in_drawing(drawing, line_cache, x,y, State.left,State.right) then
|
|
local mx,my = Drawing.coord(x-State.left, State.width), Drawing.coord(y-line_cache.starty, State.width)
|
|
for i,shape in ipairs(drawing.shapes) do
|
|
assert(shape)
|
|
if geom.on_shape(mx,my, drawing, shape) then
|
|
return drawing,line_cache,i,shape
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
function Drawing.select_point_at_mouse(State)
|
|
for drawing_index,drawing in ipairs(State.lines) do
|
|
if drawing.mode == 'drawing' then
|
|
local x, y = App.mouse_x(), App.mouse_y()
|
|
local line_cache = State.line_cache[drawing_index]
|
|
if Drawing.in_drawing(drawing, line_cache, x,y, State.left,State.right) then
|
|
local mx,my = Drawing.coord(x-State.left, State.width), Drawing.coord(y-line_cache.starty, State.width)
|
|
for i,point in ipairs(drawing.points) do
|
|
assert(point)
|
|
if Drawing.near(point, mx,my, State.width) then
|
|
return drawing_index,drawing,line_cache,i,point
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
function Drawing.select_drawing_at_mouse(State)
|
|
for drawing_index,drawing in ipairs(State.lines) do
|
|
if drawing.mode == 'drawing' then
|
|
local x, y = App.mouse_x(), App.mouse_y()
|
|
local line_cache = State.line_cache[drawing_index]
|
|
if Drawing.in_drawing(drawing, line_cache, x,y, State.left,State.right) then
|
|
return drawing
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
function Drawing.contains_point(shape, p)
|
|
if shape.mode == 'freehand' then
|
|
-- not supported
|
|
elseif shape.mode == 'line' or shape.mode == 'manhattan' then
|
|
return shape.p1 == p or shape.p2 == p
|
|
elseif shape.mode == 'polygon' or shape.mode == 'rectangle' or shape.mode == 'square' then
|
|
return table.find(shape.vertices, p)
|
|
elseif shape.mode == 'circle' then
|
|
return shape.center == p
|
|
elseif shape.mode == 'arc' then
|
|
return shape.center == p
|
|
-- ugh, how to support angles
|
|
elseif shape.mode == 'deleted' then
|
|
-- already done
|
|
else
|
|
print(shape.mode)
|
|
assert(false)
|
|
end
|
|
end
|
|
|
|
function Drawing.smoothen(shape)
|
|
assert(shape.mode == 'freehand')
|
|
for _=1,7 do
|
|
for i=2,#shape.points-1 do
|
|
local a = shape.points[i-1]
|
|
local b = shape.points[i]
|
|
local c = shape.points[i+1]
|
|
b.x = round((a.x + b.x + c.x)/3)
|
|
b.y = round((a.y + b.y + c.y)/3)
|
|
end
|
|
end
|
|
end
|
|
|
|
function round(num)
|
|
return math.floor(num+.5)
|
|
end
|
|
|
|
function Drawing.find_or_insert_point(points, x,y, width)
|
|
-- check if UI would snap the two points together
|
|
for i,point in ipairs(points) do
|
|
if Drawing.near(point, x,y, width) then
|
|
return i
|
|
end
|
|
end
|
|
table.insert(points, {x=x, y=y})
|
|
return #points
|
|
end
|
|
|
|
function Drawing.near(point, x,y, width)
|
|
local px,py = Drawing.pixels(x, width),Drawing.pixels(y, width)
|
|
local cx,cy = Drawing.pixels(point.x, width), Drawing.pixels(point.y, width)
|
|
return (cx-px)*(cx-px) + (cy-py)*(cy-py) < Same_point_distance*Same_point_distance
|
|
end
|
|
|
|
function Drawing.pixels(n, width) -- parts to pixels
|
|
return math.floor(n*width/256)
|
|
end
|
|
function Drawing.coord(n, width) -- pixels to parts
|
|
return math.floor(n*256/width)
|
|
end
|
|
|
|
function table.find(h, x)
|
|
for k,v in pairs(h) do
|
|
if v == x then
|
|
return k
|
|
end
|
|
end
|
|
end
|