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jill 2021-09-17 22:24:26 +03:00
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LICENSE Normal file
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Box of Eases
Copyright (C) 2021 Jill "oatmealine" Monoids <oatmealine@disroot.org>
This program is free software: you can redistribute it and/or modify it under
the terms of the GNU Affero General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
details.
You should have received a copy of the GNU Affero General Public License along
with this program. If not, see <https://www.gnu.org/licenses/>.

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# Box of Eases (working title)
![logo](./logo.png)
A simple Love2D application to create, preview and mix eases, meant for NITG modding.
## How-to Install
### Manual/Development (currently the only method)
Download Love2D for your operating system here: https://love2d.org/
Then launch the game like so: https://love2d.org/wiki/Getting_Started#Running_Games
## Screenshots
![Previewing eases](./screenshot1.png)
![Mixing eases](./screenshot2.png)

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function love.conf(t)
t.window.resizable = true
t.window.title = 'Box of Eases'
t.window.icon = 'logo.png'
end

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local self = {}
local sqrt = math.sqrt
local sin = math.sin
local asin = math.asin
local cos = math.cos
local pow = math.pow
local exp = math.exp
local pi = math.pi
local abs = math.abs
self = setmetatable(self, {
__index = function(s, i)
for _,v in ipairs(self) do
if v[1] == i then
return v[2]
end
end
end
})
table.insert(self, {'linear', function(t) return t end})
table.insert(self, {'instant', function() return 1 end})
table.insert(self, {'bounce', function(t) return 4 * t * (1 - t) end})
table.insert(self, {'tri', function(t) return 1 - abs(2 * t - 1) end})
table.insert(self, {'bell', function(t) return self.inOutQuint(self.tri(t)) end})
table.insert(self, {'pop', function(t) return 3.5 * (1 - t) * (1 - t) * sqrt(t) end})
table.insert(self, {'tap', function(t) return 3.5 * t * t * sqrt(1 - t) end})
table.insert(self, {'pulse', function(t) return t < .5 and self.tap(t * 2) or -self.pop(t * 2 - 1) end})
table.insert(self, {'spike', function(t) return exp(-10 * abs(2 * t - 1)) end})
table.insert(self, {'inverse', function(t) return t * t * (1 - t) * (1 - t) / (0.5 - t) end})
table.insert(self, {'inSine', function(x)
return 1 - cos(x * (pi * 0.5))
end})
table.insert(self, {'outSine', function(x)
return sin(x * (pi * 0.5))
end})
table.insert(self, {'inOutSine', function(x)
return 0.5 - 0.5 * cos(x * pi)
end})
table.insert(self, {'inQuad', function(t) return t * t end})
table.insert(self, {'outQuad', function(t) return -t * (t - 2) end})
table.insert(self, {'inOutQuad', function(t)
t = t * 2
if t < 1 then
return 0.5 * t ^ 2
else
return 1 - 0.5 * (2 - t) ^ 2
end
end})
table.insert(self, {'inCubic', function(t) return t * t * t end})
table.insert(self, {'outCubic', function(t) return 1 - (1 - t) ^ 3 end})
table.insert(self, {'inOutCubic', function(t)
t = t * 2
if t < 1 then
return 0.5 * t ^ 3
else
return 1 - 0.5 * (2 - t) ^ 3
end
end})
table.insert(self, {'inQuart', function(t) return t * t * t * t end})
table.insert(self, {'outQuart', function(t) return 1 - (1 - t) ^ 4 end})
table.insert(self, {'inOutQuart', function(t)
t = t * 2
if t < 1 then
return 0.5 * t ^ 4
else
return 1 - 0.5 * (2 - t) ^ 4
end
end})
table.insert(self, {'inQuint', function(t) return t ^ 5 end})
table.insert(self, {'outQuint', function(t) return 1 - (1 - t) ^ 5 end})
table.insert(self, {'inOutQuint', function(t)
t = t * 2
if t < 1 then
return 0.5 * t ^ 5
else
return 1 - 0.5 * (2 - t) ^ 5
end
end})
table.insert(self, {'inExpo', function(t) return 1000 ^ (t - 1) - 0.001 end})
table.insert(self, {'outExpo', function(t) return 1.001 - 1000 ^ -t end})
table.insert(self, {'inOutExpo', function(t)
t = t * 2
if t < 1 then
return 0.5 * 1000 ^ (t - 1) - 0.0005
else
return 1.0005 - 0.5 * 1000 ^ (1 - t)
end
end})
table.insert(self, {'inCirc', function(t) return 1 - sqrt(1 - t * t) end})
table.insert(self, {'outCirc', function(t) return sqrt(-t * t + 2 * t) end})
table.insert(self, {'inOutCirc', function(t)
t = t * 2
if t < 1 then
return 0.5 - 0.5 * sqrt(1 - t * t)
else
t = t - 2
return 0.5 + 0.5 * sqrt(1 - t * t)
end
end})
table.insert(self, {'outBounce', function(t)
if t < 1 / 2.75 then
return 7.5625 * t * t
elseif t < 2 / 2.75 then
t = t - 1.5 / 2.75
return 7.5625 * t * t + 0.75
elseif t < 2.5 / 2.75 then
t = t - 2.25 / 2.75
return 7.5625 * t * t + 0.9375
else
t = t - 2.625 / 2.75
return 7.5625 * t * t + 0.984375
end
end})
table.insert(self, {'inBounce', function(t) return 1 - self.outBounce(1 - t) end})
table.insert(self, {'inOutBounce', function(t)
if t < 0.5 then
return self.inBounce(t * 2) * 0.5
else
return self.outBounce(t * 2 - 1) * 0.5 + 0.5
end
end})
return self

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local easelib = require 'easelib'
-- utils
local function keys(t)
local k = {}
for n in pairs(t) do table.insert(k, n) end
return k
end
local function skeys(t)
local k = {}
for n,v in pairs(t) do table.insert(k, {n, v}) end
table.sort(k, function(a, b) return a[2].i < b[2].i end)
local k2 = {}
for _,v in ipairs(k) do table.insert(k2, v[1]) end
return k2
end
local function mix(x, y, a)
return x * (1 - a) + y * a
end
-- eases
local function mixEase(e1, e2, point)
if not point then point = 0.5 end
return function(a)
if a < point then
return e1(a / point) * point
else
return e2((a - point) / (1 - point)) * (1 - point) + point
end
end
end
local eases = {}
for i,v in pairs(easelib) do
local min = 0
local q = 10
for i = 0, q do
local s = v[2](i / q)
if s < 0 then min = -1 end
end
eases[v[1]] = {
f = v[2],
max = 1,
min = min,
i = i
}
end
local ease
local minEase = false
-- rendering constants
local padding = 6
local margin = 4
local quality = 256
local mixpoint = 0.5
local oldmixpoint = 0.5
local mixpointtimer = 0 -- easter egg thing
local mixpointspin = 0
local maxDropdown = 16
-- graph
local graph = {}
-- dropdown bullshit
local dropdowns = {}
local dropdownValueCache = {}
local openDropdown = 0
local dropdownScroll = 0
local dropdownScrollE = 0
local function selected(index)
return dropdowns[index].options[dropdowns[index].selected]
end
local function kget(key)
for _, v in ipairs(dropdowns) do
if v.name == key then
return v
end
end
end
local function kselected(key)
for _, v in ipairs(dropdowns) do
if v.name == key then
return v.options[v.selected]
end
end
end
local dropdownId
local function insertDropdown(tab, f)
dropdownId = dropdownId + 1
f.selected = (kget(f.name) or dropdownValueCache[f.name] or {selected = 1}).selected
f.selected = (f.selected - 1) % #f.options + 1
return table.insert(tab, f)
end
local function createDropdowns()
local d = {}
dropdownId = 0
insertDropdown(d, {
x = padding,
y = padding,
width = 128,
options = {
'Preview Ease',
'Mix Eases',
'Create Ease'
},
name = 'mode'
})
if d[dropdownId].selected == 1 then -- preview ease
insertDropdown(d, {
x = padding + 128 + padding,
y = padding,
width = 128,
options = skeys(eases),
name = 'ease1'
})
ease = eases[d[dropdownId].options[d[dropdownId].selected]].f
elseif d[dropdownId].selected == 2 then -- mix eases
insertDropdown(d, {
x = padding + 128 + padding,
y = padding,
width = 128,
options = skeys(eases),
name = 'ease1'
})
insertDropdown(d, {
x = padding + 128 + padding + 128 + padding,
y = padding,
width = 128,
options = skeys(eases),
name = 'ease2'
})
ease = mixEase(eases[d[dropdownId - 1].options[d[dropdownId - 1].selected]].f, eases[d[dropdownId].options[d[dropdownId].selected]].f, mixpoint)
elseif d[dropdownId].selected == 3 then -- create eases
insertDropdown(d, {
x = padding + 128 + padding,
y = padding,
width = 128,
options = skeys(eases),
name = 'ease1'
})
end
minEase = (kselected('ease1') and eases[kselected('ease1')].min == -1) or (kselected('ease2') and eases[kselected('ease2')].min == -1)
dropdowns = d
end
-- rendering
function love.load()
createDropdowns()
end
function love.update(dt)
for i = 1, quality do
local a = (i - 1) / (quality - 1)
if not graph[i] then
graph[i] = ease(a)
end
end
for i,v in ipairs(graph) do
local a = (i - 1) / (quality - 1)
local b = ease(a)
if minEase then
b = b / 2 + 0.5
end
graph[i] = mix(v, b, math.min(dt * 18, 1))
end
mixpointtimer = mix(mixpointtimer + math.abs(mixpoint - oldmixpoint), 0, math.min(dt * 8))
oldmixpoint = mix(oldmixpoint, mixpoint, math.min(dt * 20, 1))
if mixpointtimer > 2 then
mixpointtimer = mixpointtimer - 2
mixpointspin = mixpointspin + 4
end
mixpointspin = mix(mixpointspin, 0, dt * 3)
if openDropdown ~= 0 then
dropdownScroll = math.max(dropdownScroll, -(#dropdowns[openDropdown].options - maxDropdown))
dropdownScroll = math.min(dropdownScroll, 0)
dropdownScrollE = mix(dropdownScrollE, dropdownScroll, dt * 10)
end
end
function love.draw()
local mode = kget('mode').selected
local sw, sh = love.graphics.getDimensions()
local mx, my = love.mouse.getPosition()
love.graphics.setColor(0.09, 0.09, 0.12, 1)
love.graphics.rectangle('fill', 0, 0, sw, sh)
love.graphics.setColor(0.08, 0.08, 0.1, 1)
love.graphics.rectangle('line', 0, 0, sw, sh)
love.graphics.setColor(1, 1, 1, 1)
love.graphics.print('Box of Eases by oatmealine', padding, sh - love.graphics.getFont():getHeight() - padding)
-- sliders
-- yeah we do a lil' hardcoding
if mode == 2 then
local x, y, w, h = padding, padding * 2 + love.graphics.getFont():getHeight() + margin, 128, 32
love.graphics.setColor(0.7, 0.7, 0.7, 0.4)
love.graphics.line(x, y + h/2, x + w, y + h/2)
local sx, sy = x + w * oldmixpoint, y + h/2
local ssize = h * 0.5
love.graphics.push()
love.graphics.translate(sx, sy)
love.graphics.rotate((mixpoint - oldmixpoint) * 4 + mixpointspin * math.pi * 2)
love.graphics.setColor(0, 0, 0, 1)
if mx > sx - ssize/2 and mx < sx + ssize/2 and my > sy - ssize/2 and my < sy + ssize/2 and openDropdown == 0 then
love.graphics.setColor(0.2, 0.2, 0.3, 1)
end
love.graphics.rectangle('fill', -ssize/2, -ssize/2, ssize, ssize)
love.graphics.setColor(1, 1, 1, 1)
love.graphics.rectangle('line', -ssize/2, -ssize/2, ssize, ssize)
love.graphics.rotate((mixpoint - oldmixpoint) * -2)
love.graphics.setColor(1, 1, 1, 1)
love.graphics.printf(math.floor(mixpoint * 100)/100, -ssize * 6, ssize - 2, ssize * 12, 'center')
love.graphics.pop()
if mx > x and mx < x + w and my > y and my < y + h and love.mouse.isDown(1) and openDropdown == 0 then
mixpoint = (mx - x) / w
createDropdowns()
end
end
-- dropdowns
for i,v in ipairs(dropdowns) do
local x, y, w, h = v.x, v.y, v.width, love.graphics.getFont():getHeight() + margin
love.graphics.setColor(0, 0, 0, 0.3)
if love.mouse.getX() > x and love.mouse.getX() < x + w and love.mouse.getY() > y and love.mouse.getY() < y + h then
love.graphics.setColor(0.8, 0.8, 1, love.mouse.isDown(1) and 0.4 or 0.3)
end
love.graphics.rectangle('fill', x, y, w, h)
love.graphics.setColor(1, 1, 1, 1)
love.graphics.rectangle('line', x, y, w, h)
love.graphics.print(selected(i), x + margin/2, y + margin/2)
love.graphics.rectangle('line', x + w - h, y, h, h)
love.graphics.polygon('line', x + w - h/2 + 0.3 * h, y + h/2 - 0.3 * h, x + w - h/2 - 0.3 * h, y + h/2 - 0.3 * h, x + w - h/2, y + h/2 + 0.3 * h)
if openDropdown == i then
for i,o in ipairs(v.options) do
local x, y, w, h = x, y + i * h, w, h
y = y + dropdownScrollE * h
local gi = y / h
if gi > maxDropdown or gi < 1 then
goto continue
end
local a = 1 - math.min(math.max((1 - (maxDropdown - gi)) * (1 - (math.abs(dropdownScrollE) /(#v.options - maxDropdown))), 0), 1)
love.graphics.setColor(0, 0, 0, 0.3 * a)
if mx > x and mx < x + w and my > y and my < y + h then
love.graphics.setColor(0.8, 0.8, 1, (love.mouse.isDown(1) and 0.4 or 0.3) * a)
end
love.graphics.rectangle('fill', x, y, w, h)
love.graphics.setColor(1, 1, 1, 0.75 * a)
love.graphics.rectangle('line', x, y, w, h)
love.graphics.setColor(1, 1, 1, 1 * a)
love.graphics.print(v.options[i], x + 2, y + 2)
::continue::
end
-- scrollwheel
if #v.options > maxDropdown then
local displayed = maxDropdown / #v.options
local scroll = math.abs(dropdownScrollE) / (#v.options - maxDropdown)
local size = margin
love.graphics.setColor(1, 1, 1, 0.9)
love.graphics.rectangle('fill', x + w - size, y + h + scroll * (1 - displayed) * (maxDropdown - 1) * h, size, displayed * (maxDropdown - 1) * h)
end
end
end
-- graph
if mode == 1 or mode == 2 then
local csize = 10 -- preview point size
local size = math.min((sw - padding) - ((kget('ease2') or kget('ease1')).x + 128 + padding), sh - padding * 5 - csize)
local x, y, w, h = sw - padding - size, padding, size, size
love.graphics.setColor(1, 1, 1, 1)
love.graphics.rectangle('line', x, y, w, h)
-- grid
love.graphics.setColor(0.2, 0.2, 0.4, 0.2)
local gridsize = 64
for gx = 1, gridsize - 2 do
love.graphics.line(x + margin + gx * w/gridsize, y + margin, x + margin + gx * w/gridsize, y + h - margin)
end
for gy = 1, gridsize - 2 do
love.graphics.line(x + margin, y + margin + gy * h/gridsize, x + w - margin, y + margin + gy * h/gridsize)
end
-- mixease point
if mode == 2 then
love.graphics.setColor(1, 1, 1, 0.8)
love.graphics.line(x + margin + mixpoint * w, y, x + margin + mixpoint * w, y + h)
end
-- preview point
local t = love.timer.getTime() % 1
love.graphics.setColor(0.4, 0.4, 1, 0.4)
love.graphics.line(x + margin + t * w, y, x + margin + t * w, y + h)
-- y = 0 point
-- todo: this will break with eases that dont have the first point at y0
local py = graph[1]
love.graphics.setColor(0.7, 0.7, 0.7, 0.4 * (1 - math.abs(py - 0.5) / 0.5))
love.graphics.line(x, y + h - py * h, x + w, y + py * h)
-- polygone
-- this isnt done with a polygon because else itd waste a Bunch of ram and i kinda, dont want to do that?
love.graphics.setColor(1, 1, 1, 1)
local last = graph[1] or 0
for gx = 1, quality - 1 do
local a = gx/quality
local b = graph[gx + 1] or 0
local px, py = x + margin + gx * ((w - margin)/quality), y + h - margin - b * (h - margin * 2)
local ox, oy = x + margin + (gx - 1) * ((w - margin)/quality), y + h - margin - last * (h - margin * 2)
if math.abs(b - last) < 1 then
love.graphics.line(ox, oy, px, py)
end
last = b
end
-- preview
love.graphics.setColor(1, 1, 1, 0.2)
love.graphics.line(x + margin, y + h + padding * 2 + csize/2, x + w - margin, y + h + padding * 2 + csize/2)
love.graphics.setColor(0.4, 0.4, 1, 1)
local a1 = ease(t)
local a2 = ease(math.max(math.min(t - 0.1, 1), 0))
local da = a1
if love.timer.getTime() % 2 < 1 and math.floor(ease(0) + 0.5) ~= math.floor(ease(1) + 0.5) then
da = 1 - da
end
if minEase then
da = da / 2 + 0.5
end
love.graphics.ellipse('fill', x + margin + (w - margin * 2) * da, y + h + padding * 2 + csize/2, csize * (1 + math.min(math.abs(a1 - a2), 3) * 1.2), csize)
end
end
function love.mousepressed(x, y, m)
local clickedDropdown = false
for i,v in ipairs(dropdowns) do
local h = love.graphics.getFont():getHeight() + margin
if openDropdown == 0 then
if x > v.x and x < v.x + v.width and y > v.y and y < v.y + h + margin then
if m == 1 then
openDropdown = i
clickedDropdown = true
dropdownScroll = 0
dropdownScrollE = 0
elseif m == 3 then
dropdowns[i].selected = math.random(1, #dropdowns[i].options)
createDropdowns()
end
end
end
if openDropdown == i then
if x > v.x and x < v.x + v.width and y > v.y + h and y < v.y + h * (math.min(#v.options, maxDropdown) + 1) and m == 1 then
clickedDropdown = true
end
end
end
if not clickedDropdown and m == 1 then
openDropdown = 0
end
end
function love.mousereleased(x, y, m)
for i,v in ipairs(dropdowns) do
local h = love.graphics.getFont():getHeight() + margin
if openDropdown == i then
if x > v.x and x < v.x + v.width and y > v.y + h and y < v.y + h * (math.min(#v.options, maxDropdown) + 1) and m == 1 then
v.selected = math.floor((y - v.y) / h - dropdownScrollE)
openDropdown = 0
dropdownValueCache[v.name] = {selected = v.selected}
createDropdowns()
end
end
end
end
function love.wheelmoved(x, y)
if y == 0 then return end
if openDropdown ~= 0 then
dropdownScroll = dropdownScroll + y
else
local mx, my = love.mouse.getPosition()
for i,v in ipairs(dropdowns) do
local h = love.graphics.getFont():getHeight() + margin
if mx > v.x and mx < v.x + v.width and my > v.y and my < v.y + h + margin then
dropdowns[i].selected = dropdowns[i].selected - math.floor(y)
dropdowns[i].selected = (dropdowns[i].selected - 1) % #dropdowns[i].options + 1
createDropdowns()
end
end
end
end

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