〔manim教程〕第一講 物體的位置與坐標(biāo)變換 代碼展示
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00:30
?FRAME_HEIGHT=8 FRAME_WIDTH≈14 RIGHT=np.array([1, 0, 0]) UP=np.array([0, 1, 0]) LEFT=np.array([-1, 0, 0]) DOWN=np.array([0, -1, 0]) IN=np.array([0, 0, -1]) OUT=np.array([0, 0, 1])
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02:06
?使用shift方法可以根據(jù)傳入的vector移動物體
self.add(mob) mob.shift(LEFT*5) mob.shift(UP*2+RIGHT*3) mob.shift(DOWN*2, RIGHT*2) #先相加后平移
還可以使用move_to方法來使物體移動到目標(biāo)位置
move_to(point_or_mobject,aligned_edge=ORIGIN,coor_mask=np.array([1, 1, 1])) self.add(logo) logo.move_to(LEFT*5+UP*2) logo.move_to(LEFT*3,aligned_edge=LEFT) logo.move_to(LEFT*3,aligned_edge=RIGHT) logo.move_to(UP*2,color_mask=np.array([1, 0, 1]))
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04:05
?使用scale可以對物件進(jìn)行縮放
self.play(FadeIn(mob))
mob.scale(2)
mob.scale(0.5)
mob.scale(1.5,about_edge=UP)
mob.scale(0.3,about_edge=RIGHT)
mob.scale(2,about_point=np.array([-2,-2,0]))
self.play(mob.scale,1.5)
self.play(mob.scale,{'scale_factor':0.6,'about_edge':LEFT})
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05:07
?旋轉(zhuǎn)
self.add(mob) mob.shift(LEFT*2) mob.rotate(90*DEGREES,axis=OUT) mob.rotate(180*DEGREES,axis=OUT) mob.rotate(270*DEGREES,axis=OUT) mob.rotate(360*DEGREES,axis=OUT) mob.rotate(90*DEGREES,axis=IN) mob.rotate(180*DEGREES,axis=IN) mob.rotate(270*DEGREES,axis=IN) mob.rotate(360*DEGREES,axis=IN)
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05:59
?mob.rotate(angle,axis=OUT,np.array([1,0,0])) mob.rotate(angle,axis=IN,np.array([1,0,0])) mob.rotate_about_origin(angle,axis=OUT)
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07:09
?self.add(mob) mob.shift(LEFT*2) mob.rotate(90*DEGREES,axis=OUT) mob.rotate(90*DEGREES,axis=IN) mob.rotate(90*DEGREES,axis=OUT,about_point=ORIGIN) mob.rotate(90*DEGREES,axis=IN,about_point=ORIGIN)
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翻轉(zhuǎn)
07:20
?self.add(mob) mob.flip() mob.flip(axis=RIGHT) #對稱軸方向方向 mob.flip(axis=RIGHT,about_point=ORIGIN) #對稱軸過原點 mob.flip(axis=UR,about_point=LEFT*2.5)
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09:06
?self.play(FadeIn(mob))
mob.stretch(factor=2, dim=0)
mob.stretch(factor=2, dim=1)
mob.stretch(factor=3, dim=2)
mob.stretch(factor=2, dim=1,about_point=np.array([-3,-3,0]))
mob.stretch(factor=0.5, dim=1,about_point=LEFT_SIDE+TOP)
mob.stretch(factor=2, dim=1,about_edge=UP)
mob.stretch(factor=0.5, dim=1,about_edge=DOWN)
# 同樣的,所有mob的變換均為瞬間完成
# 但為了演示變換過程,
# 視頻中執(zhí)行的是將變換放入
# self.play()后對應(yīng)的動畫過程
self.play(mur.stretch, {"factor": 2, "dim": 0})
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10:21
?mob.to_corner(UL,buff=0)
for i in range(1,7):
mob[i].to_corner(UL,buff=i*0.5)
所有對mob的移動操作 需要self.add(mob)才可以呈現(xiàn)
buff默認(rèn)0.5
mob.to_edge(UP,buff=0)
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對齊
11:30
?self.add(mob) self.add(logo) mob.align_to(logo)#無作用 mob.align_to(logo,RIGHT)#右側(cè)對齊 mob.align_to(logo,UR)#右上角對齊
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12:32
?c=Circle(radius=0.5) sq = Square(side_length=0.5) c.next_to(sq) c.next_to(sq,RIGHT) c.next_to(sq,RIGHT,aligned_edge=UP)
對齊Vgroup
A=VGroup(...) B=VGroup(...) B.next_to(A[2],DOWN,submoject_to_slign=B[1],aligned_edge=LEFT) #等價于 B.next_to(A,DOWN,index_of_submobject_to_align=B[1],aligned_edge=LEFT)
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15:04
?這是一個mur貓 下面我們將用set_height和set_width方法調(diào)教它
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15:04
?img.set_height(height = 5) img.set_height(height = 3) img.set_height(height = 1) img.set_width(width = 5) img.set_width(width = 3) img.set_width(width = 1)
按名字來說set_height是設(shè)置寬，set_width是設(shè)置長，效果不是應(yīng)當(dāng)不一樣嗎？？？
set_width和set_height方法在沒有使用stretch參數(shù)的情況下和使用scale方法效果一致
加入stretch參數(shù)后可以對應(yīng)的拉伸該對象
img.set_height( ?????? height = 5, ?????? stretch = True ??? ) img.set_width( ?????? width = 5, ?????? stretch = True ??? )
標(biāo)簽：
