Add randomness to a property with the Wiggler

通過(guò)wiggler工具來(lái)為一個(gè)屬性增加隨機(jī)性

You can add randomness to any property as it varies over time by using the Wiggler.

你可以通過(guò)Wiggler工具為任何一個(gè)隨時(shí)間變化而變化的屬性增加隨機(jī)性的效果。

You can also use the wiggle expression method for this purpose. In most cases, it is easier to use the expression than to use the Wiggler.

當(dāng)然你可以通過(guò)wiggle表達(dá)式來(lái)達(dá)到同樣的目的。但在大多數(shù)情況下，使用表達(dá)式要比Wiggler工具更加容易。

Depending on the property and the options you specify, the Wiggler adds a certain number of deviations to a property by adding keyframes and randomizing interpolations coming into or out of existing keyframes. You need at least two keyframes to use the Wiggler.

根據(jù)你所指定的屬性和選項(xiàng)，Wiggler工具會(huì)通過(guò)添加關(guān)鍵幀和隨機(jī)化進(jìn)入或離開(kāi)已有關(guān)鍵幀的插值，來(lái)將一定的偏移量添加到屬性中。你至少需要兩個(gè)關(guān)鍵幀才能夠使用Wiggler工具。

Using the Wiggler, you can more closely simulate natural movement within specified limits. For example, add randomness to an animated butterfly to produce fluttering. Add it to brightness or opacity to simulate the flicker of an old projector.

通過(guò)使用Wiggler工具，你可以在指定的限制內(nèi)更加逼真地模擬自然運(yùn)動(dòng)。例如，為一個(gè)動(dòng)畫(huà)蝴蝶添加隨機(jī)性來(lái)產(chǎn)生飛舞的效果。為亮度或者不透明度添加隨機(jī)性來(lái)模擬老投影機(jī)的閃爍效果

1. Select a range of keyframes for the property.

1，選擇某一屬性一定范圍內(nèi)的關(guān)鍵幀

2. Choose Window > Wiggler.

2，選擇窗口-Wiggler

3. For Apply To, select the type of curve you want the Wiggler to change. If you selected keyframes for a property that varies spatially, you can select Spatial Path to add deviations to the motion, or Temporal Graph to add deviations to the velocity. If you selected keyframes for a property that does not vary spatially, you can select only Temporal Graph.

3，在點(diǎn)擊“應(yīng)用于”前，選擇你想讓W(xué)iggler改變的曲線(xiàn)類(lèi)型，如果你選擇了“空間變化”屬性的關(guān)鍵幀，你可以選擇“空間路徑”來(lái)為運(yùn)動(dòng)添加偏移量，或者選擇“時(shí)間圖表”來(lái)為速度增加偏移量。如果你選擇屬性的關(guān)鍵幀是非空間變化的，那你只能選擇時(shí)間圖表

4. Select a Noise Type option to specify the type of deviation due to randomly distributed pixel values (noise):Smooth Noise Produces deviations that occur more gradually, without sudden changes.Jagged Noise Produces sudden changes.

4.選擇“雜色類(lèi)型”選項(xiàng)來(lái)指定隨機(jī)分布的像素偏移量的類(lèi)型：平滑雜色所產(chǎn)生的便宜更加平緩，沒(méi)有突兀的變化。鋸齒狀雜色生成的更加突兀。

5. Select the dimensions of the property you want to affect:X, Y, or Z Adds deviations to only one dimension of the selected property. Choose the dimension from the menu.

All Independently：Independently adds a different set of deviations to each dimension.

All The Same：Adds the same set of deviations to all dimensions.

5.選擇屬性中你想影響的維度：選擇X，Y，或Z偏移將會(huì)只影響所選擇的維度，可以從菜單中選擇維度。

全部獨(dú)立：為每一個(gè)維度添加獨(dú)立的偏移

所有相同：為所有的維度添加相同的偏移

6. Set Frequency to specify how many deviations (keyframes) per second After Effects adds to the selected keyframes. A low value produces only occasional deviations, while a high value produces more erratic results. A value less than 1 creates keyframes at intervals of less than one per second. For example, a value of 0.5 creates one keyframe every 2 seconds.

6.設(shè)置頻率來(lái)指定Ae向所選的關(guān)鍵幀中每秒添加多少偏移，較低的數(shù)值會(huì)產(chǎn)生偶爾的偏移，較高的數(shù)值則產(chǎn)生更不規(guī)則的偏移，小于1的數(shù)值所產(chǎn)生的關(guān)鍵幀間隔會(huì)小于1秒一次，例如，頻率0.5意味著兩秒產(chǎn)生一個(gè)關(guān)鍵幀

7. Set Magnitude to specify the maximum size of the deviations. After Effects sets the specified magnitude to the units of the selected property, so a value for one property may produce very different results in another property.

7.設(shè)置量級(jí)來(lái)指定偏移的最大值，Ae為所選的屬性設(shè)置指定的量級(jí)，所以同樣數(shù)值的不同屬性會(huì)有不同的效果

8. Click Apply and preview the results.

8.點(diǎn)擊“應(yīng)用于”并預(yù)覽結(jié)果

9. If necessary, choose Edit > Undo Wiggler to reset the keyframes, adjust the values for Frequency and Magnitude, and then reapply the Wiggler.

9.如果有必要，選擇編輯-撤銷(xiāo)Wiggler以重置關(guān)鍵幀，調(diào)整頻率和量級(jí)的數(shù)值，然后重新應(yīng)用Wiggler.

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