To get this branch, use:
bzr branch
http://9ix.org/bzr/ld27
« back to all changes in this revision
Viewing changes to zoetrope/core/group.lua
- browse files at revision 46
- compare with another revision
- download diff
- download tarball
- view history from revision 46
- Committer: Josh C
- Date: 2015-09-05 20:31:29 UTC
- Revision ID: josh@9ix.org-20150905203129-0gb7gax8re47zf7m
inculde lovebird in build if it's required
- files added:
- .bzrignore
- zoetrope/debug
- files removed:
- zoetrope/LICENSE
- files modified:
- Info.plist
added
removed
zoetrope/core/group.lua
8
8
-- Event: onUpdate
9
9
-- Called once each frame, with the elapsed time since the last frame in seconds.
10
10
--
11
-- Event: onStartFrame
11
12
-- Called once each frame like onUpdate, but guaranteed to fire before any others' onUpdate handlers.
12
13
--
13
14
-- Event: onEndFrame
31
31
solid = true,
32
32
33
33
-- Property: sprites
34
-- A table of member sprites, in drawing order.
34
-- A table of member sprites, in drawing order. You can iterate over this
35
-- table with <members()>.
35
36
sprites = {},
36
37
37
38
-- Property: timeScale
42
43
-- This table's x and y properties shift member sprites' positions when drawn.
43
44
-- To draw sprites at their normal position, set both x and y to 0.
44
45
translate = { x = 0, y = 0 },
45
46
46
47
-- Property: translateScale
47
48
-- This table's x and y properties multiply member sprites'
48
49
-- positions, which you can use to simulate parallax scrolling. To draw
49
50
-- sprites at their normal position, set both x and y to 1.
50
51
translateScale = { x = 1, y = 1 },
51
52
53
-- an actual love.graphics.translate call
54
realTranslate = { x = 0, y = 0 },
55
56
-- Property: scale
57
-- Zooms in or out all drawing operations in the group, centering them with
58
-- respect to the <origin> property.
59
scale = 1,
60
61
-- Property: distort
62
-- Distorts the group's scale, similar to <Sprite.distort>.
63
distort = { x = 1, y = 1 },
64
65
-- Property: origin
66
-- Sets the center point for all scaling operations.
67
origin = { x = 0, y = 0 },
68
52
69
-- Method: add
53
70
-- Adds a sprite to the group.
54
71
--
56
73
-- sprite - <Sprite> to add
57
74
--
58
75
-- Returns:
59
-- nothing
76
-- the sprite added, so you can write things like
77
-- self.player = self:add(Player:new())
60
78
61
79
add = function (self, sprite)
62
80
assert(sprite, 'asked to add nil to a group')
63
81
assert(sprite ~= self, "can't add a group to itself")
64
82
65
83
if STRICT and self:contains(sprite) then
66
84
local info = debug.getinfo(2, 'Sl')
67
85
print('Warning: adding a sprite to a group it already belongs to (' ..
69
87
end
70
88
71
89
table.insert(self.sprites, sprite)
90
return sprite
72
91
end,
73
92
74
93
-- Method: remove
75
94
-- Removes a sprite from the group. If the sprite is
76
95
-- not in the group, this does nothing.
77
--
96
--
78
97
-- Arguments:
79
98
-- sprite - <Sprite> to remove
80
--
99
--
81
100
-- Returns:
82
101
-- nothing
83
102
84
103
remove = function (self, sprite)
85
for i, spr in ipairs(self.sprites) do
104
for i, spr in self:members() do
86
105
if spr == sprite then
87
106
table.remove(self.sprites, i)
88
107
return
89
108
end
90
109
end
91
110
92
111
if STRICT then
93
112
local info = debug.getinfo(2, 'Sl')
94
113
print('Warning: asked to remove a sprite from a group it was not a member of (' ..
107
126
-- nothing
108
127
109
128
moveToFront = function (self, sprite)
110
for i, spr in ipairs(self.sprites) do
129
for i, spr in self:members() do
111
130
if spr == sprite then
112
131
table.remove(self.sprites, i)
113
132
table.insert(self.sprites, sprite)
129
148
--
130
149
-- Returns:
131
150
-- nothing
132
151
133
152
moveToBack = function (self, sprite)
134
for i, spr in ipairs(self.sprites) do
153
for i, spr in self:members() do
135
154
if spr == sprite then
136
155
table.remove(self.sprites, i)
137
156
table.insert(self.sprites, 1, sprite)
158
177
table.sort(self.sprites, func)
159
178
end,
160
179
180
-- Method: members
181
-- A convenience method that iterates over all member sprites.
182
--
183
-- Arguments:
184
-- none
185
--
186
-- Returns:
187
-- order, sprite
188
189
members = function (self)
190
return ipairs(self.sprites)
191
end,
192
161
193
-- Method: collide
162
194
-- Collides all solid sprites in the group with another sprite or group.
163
195
-- This calls the <Sprite.onCollide> event handlers on all sprites that
169
201
-- Arguments:
170
202
-- ... - any number of <Sprite>s or <Group>s to collide with. If none
171
203
-- are specified, the group collides with itself.
172
--
204
--
173
205
-- Returns:
174
206
-- nothing
175
207
--
215
247
setEffect = function (self, filename, effectType)
216
248
effectType = effectType or 'screen'
217
249
218
if love.graphics.isSupported('pixeleffect') and
250
if love.graphics.isSupported('shader') and
219
251
(effectType == 'sprite' or love.graphics.isSupported('canvas'))then
220
252
if filename then
221
self.effect = love.graphics.newPixelEffect(Cached:text(filename))
253
self.effect = love.graphics.newShader(Cached:text(filename))
222
254
self.effectType = effectType
223
255
else
224
256
self.effect = nil
232
264
233
265
-- Method: count
234
266
-- Counts how many sprites are in this group.
235
--
267
--
236
268
-- Arguments:
237
269
-- subgroups - include subgroups?
238
--
270
--
239
271
-- Returns:
240
272
-- integer count
241
273
243
275
if subgroups then
244
276
local count = 0
245
277
246
for _, spr in pairs(self.sprites) do
278
for _, spr in self:members() do
247
279
if spr:instanceOf(Group) then
248
280
count = count + spr:count(true)
249
281
else
302
334
contains = function (self, sprite, recurse)
303
335
if recurse ~= false then recurse = true end
304
336
305
for _, spr in pairs(self.sprites) do
337
for _, spr in self:members() do
306
338
if spr == sprite then return true end
307
339
308
340
if recurse and spr:instanceOf(Group) and spr:contains(sprite) then
331
363
-- Returns:
332
364
-- nothing
333
365
334
loadLayers = function (self, file, tileClass)
335
local ok, data = pcall(loadstring(Cached:text(file)))
336
local _, _, directory = string.find(file, '^(.*[/\\])')
337
directory = directory or ''
338
339
if ok then
340
-- store tile properties by gid
341
342
local tileProtos = {}
343
344
for _, tileset in pairs(data.tilesets) do
345
for _, tile in pairs(tileset.tiles) do
346
local id = tileset.firstgid + tile.id
347
348
for key, value in pairs(tile.properties) do
349
tile.properties[key] = tovalue(value)
350
end
351
352
tileProtos[id] = tile
353
tileProtos[id].width = tileset.tilewidth
354
tileProtos[id].height = tileset.tileheight
355
end
356
end
357
358
for _, layer in pairs(data.layers) do
359
if self.prototype[layer.name] then
360
error('The class you are loading layers into reserves the ' .. layer.name .. ' property for its own use; you cannot load a layer with that name')
361
end
362
363
if STRICT and self[layer.name] then
364
local info = debug.getinfo(2, 'Sl')
365
print('Warning: a property named ' .. layer.name .. ' already exists in this group (' ..
366
info.short_src .. ', line ' .. info.currentline .. ')')
367
end
368
369
if layer.type == 'tilelayer' then
370
local map = Map:new{ spriteWidth = data.tilewidth, spriteHeight = data.tileheight }
371
map:empty(layer.width, layer.height)
372
373
-- load tiles
374
375
for _, tiles in pairs(data.tilesets) do
376
map:loadTiles(directory .. tiles.image, tileClass or Tile, tiles.firstgid)
377
378
-- and mix in properties where applicable
379
380
for id, tile in pairs(tileProtos) do
381
if map.sprites[id] then
382
map.sprites[id]:mixin(tile.properties)
383
end
384
end
385
end
386
387
-- load tile data
388
389
local x = 1
390
local y = 1
391
392
for _, val in ipairs(layer.data) do
393
map.map[x][y] = val
394
x = x + 1
395
396
if x > layer.width then
397
x = 1
398
y = y + 1
399
end
400
end
401
402
self[layer.name] = map
403
self:add(map)
404
elseif layer.type == 'objectgroup' then
405
local group = Group:new()
406
407
for _, obj in pairs(layer.objects) do
408
-- roll in tile properties if based on a tile
409
410
if obj.gid and tileProtos[obj.gid] then
411
local tile = tileProtos[obj.gid]
412
413
obj.name = tile.properties.name
414
obj.width = tile.width
415
obj.height = tile.height
416
417
for key, value in pairs(tile.properties) do
418
obj.properties[key] = tovalue(value)
419
end
420
421
-- Tiled tile-based objects measure their y
422
-- position at their lower-left corner, instead
423
-- of their upper-left corner as usual
424
425
obj.y = obj.y - obj.height
426
end
427
428
-- create a new object if the class does exist
429
430
local spr
431
432
if _G[obj.name] then
433
obj.properties.x = obj.x
434
obj.properties.y = obj.y
435
obj.properties.width = obj.width
436
obj.properties.height = obj.height
437
438
spr = _G[obj.name]:new(obj.properties)
439
else
440
spr = Fill:new{ x = obj.x, y = obj.y, width = obj.width, height = obj.height, fill = { 128, 128, 128 } }
441
end
442
443
if obj.properties._the then
444
the[obj.properties._the] = spr
445
end
446
447
group:add(spr)
448
end
449
450
self[layer.name] = group
451
self:add(group)
452
else
453
error("don't know how to create a " .. layer.type .. " layer from file data")
454
end
455
end
456
else
457
error('could not load layers from file: ' .. data)
458
end
459
end,
366
loadLayers = function (self, file, tileClass)
367
local ok, data = pcall(loadstring(Cached:text(file)))
368
local _, _, directory = string.find(file, '^(.*[/\\])')
369
directory = directory or ''
370
371
if ok then
372
-- store tile properties by gid
373
374
local tileProtos = {}
375
376
for _, tileset in pairs(data.tilesets) do
377
for _, tile in pairs(tileset.tiles) do
378
local id = tileset.firstgid + tile.id
379
380
for key, value in pairs(tile.properties) do
381
tile.properties[key] = tovalue(value)
382
end
383
384
tileProtos[id] = tile
385
tileProtos[id].width = tileset.tilewidth
386
tileProtos[id].height = tileset.tileheight
387
end
388
end
389
390
for _, layer in pairs(data.layers) do
391
if self.prototype[layer.name] then
392
error('The class you are loading layers into reserves the ' .. layer.name .. ' property for its own use; you cannot load a layer with that name')
393
end
394
395
if STRICT and self[layer.name] then
396
local info = debug.getinfo(2, 'Sl')
397
print('Warning: a property named ' .. layer.name .. ' already exists in this group (' ..
398
info.short_src .. ', line ' .. info.currentline .. ')')
399
end
400
401
if layer.type == 'tilelayer' then
402
local map = Map:new{ spriteWidth = data.tilewidth, spriteHeight = data.tileheight }
403
map:empty(layer.width, layer.height)
404
405
-- load tiles
406
407
for _, tiles in pairs(data.tilesets) do
408
map:loadTiles(directory .. tiles.image, tileClass or Tile, tiles.firstgid)
409
410
-- and mix in properties where applicable
411
412
for id, tile in pairs(tileProtos) do
413
if map.sprites[id] then
414
map.sprites[id]:mixin(tile.properties)
415
end
416
end
417
end
418
419
-- load tile data
420
421
local x = 1
422
local y = 1
423
424
for _, val in ipairs(layer.data) do
425
map.map[x][y] = val
426
x = x + 1
427
428
if x > layer.width then
429
x = 1
430
y = y + 1
431
end
432
end
433
434
self[layer.name] = map
435
self:add(map)
436
elseif layer.type == 'objectgroup' then
437
local group = Group:new()
438
439
for _, obj in pairs(layer.objects) do
440
-- roll in tile properties if based on a tile
441
442
if obj.gid and tileProtos[obj.gid] then
443
local tile = tileProtos[obj.gid]
444
445
obj.name = tile.properties.name
446
obj.width = tile.width
447
obj.height = tile.height
448
449
for key, value in pairs(tile.properties) do
450
obj.properties[key] = tovalue(value)
451
end
452
453
-- Tiled tile-based objects measure their y
454
-- position at their lower-left corner, instead
455
-- of their upper-left corner as usual
456
457
obj.y = obj.y - obj.height
458
end
459
460
-- create a new object if the class does exist
461
462
local spr
463
464
if _G[obj.name] then
465
obj.properties.x = obj.x
466
obj.properties.y = obj.y
467
obj.properties.width = obj.width
468
obj.properties.height = obj.height
469
470
spr = _G[obj.name]:new(obj.properties)
471
else
472
spr = Fill:new{ x = obj.x, y = obj.y, width = obj.width, height = obj.height, fill = { 128, 128, 128 } }
473
end
474
475
if obj.properties._the then
476
the[obj.properties._the] = spr
477
end
478
479
group:add(spr)
480
end
481
482
self[layer.name] = group
483
self:add(group)
484
else
485
error("don't know how to create a " .. layer.type .. " layer from file data")
486
end
487
end
488
else
489
error('could not load layers from file: ' .. data)
490
end
491
end,
492
460
493
461
494
-- passes startFrame events to member sprites
462
495
463
496
startFrame = function (self, elapsed)
464
497
if not self.active then return end
465
498
elapsed = elapsed * self.timeScale
466
467
for _, spr in pairs(self.sprites) do
499
500
for _, spr in self:members() do
468
501
if spr.active then spr:startFrame(elapsed) end
469
502
end
470
503
477
510
if not self.active then return end
478
511
elapsed = elapsed * self.timeScale
479
512
480
for _, spr in pairs(self.sprites) do
513
for _, spr in self:members() do
481
514
if spr.active then spr:update(elapsed) end
482
515
end
483
516
490
523
if not self.active then return end
491
524
elapsed = elapsed * self.timeScale
492
525
493
for _, spr in pairs(self.sprites) do
526
for _, spr in self:members() do
494
527
if spr.active then spr:endFrame(elapsed) end
495
528
end
496
529
504
537
-- x - x offset in pixels
505
538
-- y - y offset in pixels
506
539
507
draw = function (self, x, y)
540
draw = function (self, x, y, yield)
508
541
if not self.visible then return end
509
542
x = x or self.translate.x
510
543
y = y or self.translate.y
511
544
512
545
local scrollX = x * self.translateScale.x
513
546
local scrollY = y * self.translateScale.y
514
547
local appWidth = the.app.width
515
548
local appHeight = the.app.height
549
local scaled = self.scale ~= 1 or self.distort.x ~= 1 or self.distort.y ~= 1 or self.realTranslate.x ~= 0 or self.realTranslate.y ~= 0
516
550
517
551
if self.effect then
518
552
if self.effectType == 'screen' then
520
554
self._canvas:clear()
521
555
love.graphics.setCanvas(self._canvas)
522
556
elseif self.effectType == 'sprite' then
523
love.graphics.setPixelEffect(self.effect)
557
love.graphics.setShader(self.effect)
524
558
end
525
559
end
526
527
for _, spr in pairs(self.sprites) do
560
561
if scaled then
562
local scaleX = self.scale * self.distort.x
563
local scaleY = self.scale * self.distort.y
564
565
love.graphics.push()
566
567
love.graphics.translate(self.realTranslate.x, self.realTranslate.y)
568
569
love.graphics.translate(self.origin.x, self.origin.y)
570
love.graphics.scale(scaleX, scaleY)
571
love.graphics.translate(- self.origin.x, - self.origin.y)
572
end
573
574
for _, spr in self:members() do
528
575
if spr.visible then
529
576
if spr.translate then
530
577
spr:draw(spr.translate.x + scrollX, spr.translate.y + scrollY)
541
588
end
542
589
end
543
590
end
544
591
592
if yield then yield(self, x, y) end
593
594
if scaled then
595
love.graphics.pop()
596
end
597
545
598
if self.effect then
546
599
if self.effectType == 'screen' then
547
love.graphics.setPixelEffect(self.effect)
600
love.graphics.setShader(self.effect)
548
601
love.graphics.setCanvas()
549
602
love.graphics.draw(self._canvas)
550
603
end
551
604
552
love.graphics.setPixelEffect()
605
love.graphics.setShader()
553
606
end
554
607
end,
555
608
Loggerhead is a web-based interface for Breezy
Version: 2.0.1