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                ## **part_type_alpha2** **設置指定粒子的兩種混合alpha值** #### **語法:** part_type_alpha2(ind, alpha1, alpha2); | 參數 | 描述 | | --- | --- | | ind | 粒子類型ID | | alpha1 | 粒子生成時的透明值 | | alpha2 | 粒子結束時的透明值 | **返回:** N/A #### **描述** 此函數可用于為給定類型創建的每個粒子設置兩個alpha值在整個生命周期中進行漸變。粒子從產生以第一個alpha值開始,第二個alpha值是粒子在其結束時的alpha值,并且在粒子生命周期之中alpha值會發生從一種alpha值到另一種alpha值以平滑梯度的變化。 #### **舉例:** ~~~ part_type_alpha2(global.Snow_Part, 0, 1); ~~~ 上面的代碼將使所有在變量“Snow_Part”中索引的粒子類型在其整個生命周期中具有從0到1的透明度變化。
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