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Viewing changes to zoetrope/core/tween.lua

  • Committer: Josh C
  • Date: 2013-08-25 02:04:52 UTC
  • Revision ID: josh@9ix.org-20130825020452-py8fijli8m5te5gv
improve performance with (sketchy, experimental) sprite batches

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Lines of Context:
zoetrope/core/tween.lua
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                        assert(self.easers[ease], 'easer ' .. ease .. ' is not defined')
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                end
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                local tween = { target = target, property = property, propType = propType, to = to, duration = duration, ease = ease }
 
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                -- check for an existing tween for this target and property
 
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                for i, existing in ipairs(self.tweens) do
 
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                        if target == existing.target and property == existing.property then
 
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                                if to == existing.to then
 
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                                        return existing.promise
 
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                                else
 
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                                        table.remove(self.tweens, i)
 
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                                end
 
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                        end
 
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                end
 
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                -- add it
 
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                tween = { target = target, property = property, propType = propType, to = to, duration = duration, ease = ease }
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                tween.from = self:getTweenValue(tween)
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                tween.type = type(tween.from)
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                else
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                        error('tweened property must either be a number or a table of numbers, is ' .. tween.type)
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                end
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                -- check for an existing tween for this target and property
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                for i, existing in ipairs(self.tweens) do
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                        if target == existing.target and property == existing.property then
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                                if to == existing.to then
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                                        return existing.promise
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                                else
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                                        existing.promise:fail('Overridden by a later tween')
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                                        table.remove(self.tweens, i)
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                                end
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                        end
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                end
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                tween.elapsed = 0
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                tween.promise = Promise:new()
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                table.insert(self.tweens, tween)
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                           (type(tween.property) == 'table' and tween.property[1] == property) or
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                           not property) then
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                                found = true
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                                tween.promise:fail('Stopped')
 
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                                tween.promise:fail('Tween stopped')
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                                table.remove(self.tweens, i)
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                        end
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                end