273 lines
6.8 KiB
Plaintext
273 lines
6.8 KiB
Plaintext
-- some examples that each get loaded into a pane
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-- each example has a name, so we can avoid bringing back up an example someone deleted.
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-- Be careful not to rename example panes; that will cause them to pop up again and annoy people who've already deleted them.
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-- If you delete a name, be careful not to reuse it in future.
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Example_panes = {
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{
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name='expr',
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lines={
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'-- Some examples; feel free to delete.',
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'-- First example: you can perform',
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'-- simple calculations.',
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'',
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'2+3',
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'',
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"-- Try hitting the 'run' button above.",
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"-- When you're done, tap on the",
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'-- right margin to go to the next',
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'-- example.',
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}
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},
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{
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name='print',
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lines={
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'-- print() calls show up in the area',
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"-- below. Hit 'run' and then try scrolling",
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'-- through the results.',
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'for i=1,20 do',
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' print(i)',
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'end',
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},
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},
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{
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name='draw',
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lines={
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'-- You can draw on the screen.',
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"-- After you hit 'run', try hitting 'hide'.",
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'-- The editor will disappear. Hit show',
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"-- to bring it back.",
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'love.graphics.line(100,100, 200,300)',
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},
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},
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{
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name='pattern',
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lines={
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'-- A larger drawing: A checkerboard',
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'-- Notice Safe_width and Safe_height',
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'-- for the bounds of the screen.',
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'n = 100',
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'for x=0,Safe_width,n do',
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' for y=0,Safe_height,n do',
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' if (x+y)/n%2 == 0 then',
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' love.graphics.setColor(0.9, 0.7, 0.7)',
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' else',
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' love.graphics.setColor(0.7, 0.7, 0.9)',
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' end',
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" love.graphics.rectangle('fill', x,y, n,n)",
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' end',
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'end',
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},
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},
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{
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name='animation',
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lines={
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'-- For animations, you can define various',
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'-- functions that will get called for you.',
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'-- LÖVE looks for functions called',
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'-- love.draw, love.update, etc.',
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"-- You can't define those directly (they",
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'-- contain Carousel code), but you can',
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'-- define car.draw, car.update,etc.',
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'Radius, dRadius = 100, 10',
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'function car.draw()',
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" love.graphics.circle('fill', 100,100, Radius)",
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'end',
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'',
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'function car.update(dt)',
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' Radius = Radius+dRadius',
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' if Radius > 500 then dRadius = -dRadius end',
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' if Radius < 30 then dRadius = -dRadius end',
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'end',
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},
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},
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{
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name='interactive',
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lines={
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'-- For interactivity, LÖVE provides',
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'-- functions like love.keypressed,',
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'-- love.mousepressed, etc.',
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'-- As before, define car.keypressed,',
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'-- car.mousepressed, etc.',
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'-- These interactive events only activate',
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'-- when the editor is hidden using the',
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"-- 'hide' button above.",
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'--',
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'-- Try running this example and then',
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'-- pressing and holding the mouse and',
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'-- typing keys.',
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'-- Then try again after hiding the editor.',
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'X, Y, dX = 100, 0, 10',
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"Log = ''",
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'',
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'function car.draw()',
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' love.graphics.line(X,Y, X,Y+300)',
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' love.graphics.print(Log, 50,50)',
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'end',
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'',
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'function car.update(dt)',
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' if X > 500 then dX = -dX end',
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' if X < 100 then dX = -dX end',
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' X = X+dX',
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'end',
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'',
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'function car.mousepressed(x,y, button)',
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' Y = y',
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'end',
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'',
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'function car.mousereleased(x,y, button)',
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' Y = 0',
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'end',
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'',
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'function car.keypressed(key)',
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' Log = Log..key',
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'end',
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},
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},
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{
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name='abbreviations',
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lines={
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'-- Some abbreviations to reduce typing.',
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'g = love.graphics',
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'pt, line = g.points, g.line',
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'rect, poly = g.rectangle, g.polygon',
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'circle, arc, ellipse = g.circle, g.arc, g.ellipse',
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'color = g.setColor',
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'min, max = math.min, math.max',
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'floor, ceil = math.floor, math.ceil',
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'abs, rand = math.abs, math.random',
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'pi, cos, sin = math.pi, math.cos, math.sin',
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'touches = love.touch.getTouches',
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'touch = love.touch.getPosition',
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'audio = love.audio.newSource',
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"-- Hit 'run', Now they're available to other",
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'-- panes.',
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},
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},
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{
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name='circ',
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lines={
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'-- A snazzy circle',
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'-- Try hiding the editor and tapping',
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'-- around on screen.',
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'cx, cy, N = 30, 100, 100',
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'function dist2(x1,y1, x2,y2)',
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' return (x2-x1)^2 + (y2-y1)^2',
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'end',
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'',
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'function car.draw()',
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' for x=cx-N,cx+N do',
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' for y=cy-N,cy+N do',
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' if dist2(cx,cy, x,y) < N*N then',
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' color(abs(x-cx)/N, abs(y-cy)/N, 0.5)',
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' pt(x,y)',
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'end end end end',
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'',
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'function car.mousepressed(x,y, b)',
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' cx,cy = x,y',
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'end',
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},
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},
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{
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name='pacman',
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lines={
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'-- Pacman',
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'function init_balls()',
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' balls = {}',
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' for x=50,Safe_width-1,50 do',
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' for y=30,Safe_height-1,50 do',
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' table.insert(balls, {x=x, y=y, show = true})',
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'end end end',
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'init_balls()',
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'',
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'function eat_ball()',
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' for _,b in ipairs(balls) do',
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' if b.x == x and b.y == y then',
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' b.show = false',
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'end end end',
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'',
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'x, y = 30, 30',
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'dx = 5',
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'dang = 0 -- change in mouth angle',
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'',
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'function car.draw()',
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' color(0.8, 0.8, 0)',
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" arc('fill', x,y, 20, dang + 0.5, dang + 2*math.pi - 0.5)",
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' for _,b in ipairs(balls) do',
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' if b.show then',
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" circle('fill', b.x, b.y, 10)",
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'end end end',
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'',
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'function car.update(dt)',
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' x = x+dx',
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' eat_ball()',
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' if x > Safe_width then',
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' y, dx = y+50, -5',
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' dang = math.pi',
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' elseif x < 0 then',
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' y, dx = y+50, 5',
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' dang = 0',
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' end',
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' if y > Safe_height then',
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' y = 30',
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' init_balls()',
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' end',
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'end',
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},
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},
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{
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name='trails',
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lines={
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'-- This one is for a multitouch screen.',
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'-- Try hiding the editor and swiping',
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'-- your finger around.',
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'W,H = g.getDimensions()',
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'T = 0.1 -- seconds',
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'U = 0',
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'',
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'trails = {}',
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'',
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'function car.draw()',
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' for _,trail in pairs(trails) do',
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' color(trail.r, trail.g,trail.b)',
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' for _,c in ipairs(trail) do',
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" circle('fill', c.x,c.y, c.r)",
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'end end end',
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'',
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'function car.update(dt)',
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' U = U + dt',
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' if U < T then return end',
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' U = U - T',
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' for _,id in ipairs(touches()) do',
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' local x,y = touch(id)',
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' if trails[id] then',
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' table.insert(trails[id], 1, {x=x, y=y, r=100})',
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'end end',
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' for id,trail in pairs(trails) do',
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' for i=#trail,1,-1 do',
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' local c = trail[i]',
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' c.r = c.r - 10',
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' if c.r <= 0 then table.remove(trail, i) end',
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' end',
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' if #trail == 0 then trails[id] = nil end',
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' end',
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'end',
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'',
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'function car.touchpressed(id, x,y, ...)',
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' trails[id] = {r=rand(), g=rand(), b=rand()}',
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'end',
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},
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},
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{
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name='beginning',
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lines={
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'-- Over to you. We hope you enjoy Lua Carousel!',
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'-- Looking for more inspiration?',
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'-- Try https://akkartik.itch.io/carousel/devlog',
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'',
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'-- P.S. As you create your programs,',
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"-- don't forget to hit the 'save' button",
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'-- above to preserve them across restarts.',
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},
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},
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}
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