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                ## **part_type_step** **設定一個粒子類型的所有粒子在每一步都會產生一定數量的另一個粒子類型的粒子** #### **語法:** part_type_step(ind, step_number, step_type); | 參數 | 描述 | | --- | --- | | ind | 粒子類型ID | | step_number | 每一步產生新粒子類型的數量(設置為負值,代表有一定1/所填值的釋放幾率) | | step_type | 需要產生的新粒子類型的ID | **返回:** N/A #### **描述** 這個函數可以用來使你的粒子類型流每一步都產生另一種粒子類型,直到它的生命周期結束。你可以為把step_number設置一個負值,并以此為基礎以隨機性發射一個粒子,例如,填寫一個-3的值將有1/3的機會每步發射一個粒子。 注意:切勿使用相同的粒子類型,因為這將導致無限循環,并可能在數秒內崩潰游戲!另外,使用這個時要非常小心,因為這會大大增加屏幕上的粒子數量,并導致游戲速度明顯下降。 #### **舉例:** ~~~ particle2 = part_type_create(); part_type_shape(particle2, pt_shape_smoke); part_type_size(particle2, 0.01, 0.01, 0.01, 0); part_type_scale(particle2, 1, 1); part_type_colour3(particle2, 4227327, 8454143, 4227327); part_type_alpha3(particle2,1, 0.50, 0.80); part_type_speed(particle2, 0, 0, 0, 0); part_type_direction(particle2, 0, 359, 0, 0); part_type_gravity(particle2, 0, 270); part_type_orientation(particle2, 0, 0, -2, 0, 1); part_type_blend(particle2, 1); part_type_life(particle2, 160, 160); particle3 = part_type_create(); part_type_shape(particle3, pt_shape_flare); part_type_size(particle3, 0.20, 0.20, 0.02, 0); part_type_scale(particle3, 1, 1); part_type_colour3(particle3, 16777215, 8454143, 16777215); part_type_alpha3(particle3, 0, 0.50, 0); part_type_speed(particle3, 3, 3, -0.03, 0); part_type_direction(particle3, 0, 359, 0, 0); part_type_gravity(particle3, 0, 270); part_type_orientation(particle3, 0, 0, 0, 0, 1); part_type_blend(particle3, 1); part_type_life(particle3, 40, 80); part_type_step(particle2, 2, particle3); ~~~ 上面的代碼創建并定義了兩個粒子,并將在變量“粒子2”中建立的粒子設置為每一步兩個“粒子3”的粒子。
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