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立方体每列颜色不同:
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# Import libraries import matplotlib.pyplot as plt from mpl_toolkits.mplot3d import Axes3D import numpy as np # Create axis axes = [ 5 , 5 , 5 ] # Create Data data = np.ones(axes, dtype = np. bool ) # Controll Tranperency alpha = 0.9 # Control colour colors = np.empty(axes + [ 4 ], dtype = np.float32) colors[ 0 ] = [ 1 , 0 , 0 , alpha] # red colors[ 1 ] = [ 0 , 1 , 0 , alpha] # green colors[ 2 ] = [ 0 , 0 , 1 , alpha] # blue colors[ 3 ] = [ 1 , 1 , 0 , alpha] # yellow colors[ 4 ] = [ 1 , 1 , 1 , alpha] # grey # Plot figure fig = plt.figure() ax = fig.add_subplot( 111 , projection = '3d' ) # Voxels is used to customizations of # the sizes, positions and colors. ax.voxels(data, facecolors = colors, edgecolors = 'grey' ) |
立方体各面颜色不同:
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import matplotlib.pyplot as plt import numpy as np def generate_rubik_cube(nx, ny, nz): """ 根据输入生成指定尺寸的魔方 :param nx: :param ny: :param nz: :return: """ # 准备一些坐标 n_voxels = np.ones((nx + 2 , ny + 2 , nz + 2 ), dtype = bool ) # 生成间隙 size = np.array(n_voxels.shape) * 2 filled_2 = np.zeros(size - 1 , dtype = n_voxels.dtype) filled_2[:: 2 , :: 2 , :: 2 ] = n_voxels # 缩小间隙 # 构建voxels顶点控制网格 # x, y, z均为6x6x8的矩阵,为voxels的网格,3x3x4个小方块,共有6x6x8个顶点。 # 这里//2是精髓,把索引范围从[0 1 2 3 4 5]转换为[0 0 1 1 2 2],这样就可以单独设立每个方块的顶点范围 x, y, z = np.indices(np.array(filled_2.shape) + 1 ).astype( float ) / / 2 # 3x6x6x8,其中x,y,z均为6x6x8 x[ 1 :: 2 , :, :] + = 0.95 y[:, 1 :: 2 , :] + = 0.95 z[:, :, 1 :: 2 ] + = 0.95 # 修改最外面的面 x[ 0 , :, :] + = 0.94 y[:, 0 , :] + = 0.94 z[:, :, 0 ] + = 0.94 x[ - 1 , :, :] - = 0.94 y[:, - 1 , :] - = 0.94 z[:, :, - 1 ] - = 0.94 # 去除边角料 filled_2[ 0 , 0 , :] = 0 filled_2[ 0 , - 1 , :] = 0 filled_2[ - 1 , 0 , :] = 0 filled_2[ - 1 , - 1 , :] = 0 filled_2[:, 0 , 0 ] = 0 filled_2[:, 0 , - 1 ] = 0 filled_2[:, - 1 , 0 ] = 0 filled_2[:, - 1 , - 1 ] = 0 filled_2[ 0 , :, 0 ] = 0 filled_2[ 0 , :, - 1 ] = 0 filled_2[ - 1 , :, 0 ] = 0 filled_2[ - 1 , :, - 1 ] = 0 # 给魔方六个面赋予不同的颜色 colors = np.array([ '#ffd400' , "#fffffb" , "#f47920" , "#d71345" , "#145b7d" , "#45b97c" ]) facecolors = np.full(filled_2.shape, '#77787b' ) # 设一个灰色的基调 # facecolors = np.zeros(filled_2.shape, dtype='U7') facecolors[:, :, - 1 ] = colors[ 0 ] # 上黄 facecolors[:, :, 0 ] = colors[ 1 ] # 下白 facecolors[:, 0 , :] = colors[ 2 ] # 左橙 facecolors[:, - 1 , :] = colors[ 3 ] # 右红 facecolors[ 0 , :, :] = colors[ 4 ] # 前蓝 facecolors[ - 1 , :, :] = colors[ 5 ] # 后绿 ax = plt.figure().add_subplot(projection = '3d' ) ax.voxels(x, y, z, filled_2, facecolors = facecolors) plt.show() if __name__ = = '__main__' : generate_rubik_cube( 4 , 4 , 4 ) |
彩色透视立方体:
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from __future__ import division import numpy as np from mpl_toolkits.mplot3d import Axes3D from mpl_toolkits.mplot3d.art3d import Poly3DCollection from matplotlib.pyplot import figure, show def quad(plane = 'xy' , origin = None , width = 1 , height = 1 , depth = 0 ): u, v = ( 0 , 0 ) if origin is None else origin plane = plane.lower() if plane = = 'xy' : vertices = ((u, v, depth), (u + width, v, depth), (u + width, v + height, depth), (u, v + height, depth)) elif plane = = 'xz' : vertices = ((u, depth, v), (u + width, depth, v), (u + width, depth, v + height), (u, depth, v + height)) elif plane = = 'yz' : vertices = ((depth, u, v), (depth, u + width, v), (depth, u + width, v + height), (depth, u, v + height)) else : raise ValueError( '"{0}" is not a supported plane!' . format (plane)) return np.array(vertices) def grid(plane = 'xy' , origin = None , width = 1 , height = 1 , depth = 0 , width_segments = 1 , height_segments = 1 ): u, v = ( 0 , 0 ) if origin is None else origin w_x, h_y = width / width_segments, height / height_segments quads = [] for i in range (width_segments): for j in range (height_segments): quads.append( quad(plane, (i * w_x + u, j * h_y + v), w_x, h_y, depth)) return np.array(quads) def cube(plane = None , origin = None , width = 1 , height = 1 , depth = 1 , width_segments = 1 , height_segments = 1 , depth_segments = 1 ): plane = (( '+x' , '-x' , '+y' , '-y' , '+z' , '-z' ) if plane is None else [p.lower() for p in plane]) u, v, w = ( 0 , 0 , 0 ) if origin is None else origin w_s, h_s, d_s = width_segments, height_segments, depth_segments grids = [] if '-z' in plane: grids.extend(grid( 'xy' , (u, w), width, depth, v, w_s, d_s)) if '+z' in plane: grids.extend(grid( 'xy' , (u, w), width, depth, v + height, w_s, d_s)) if '-y' in plane: grids.extend(grid( 'xz' , (u, v), width, height, w, w_s, h_s)) if '+y' in plane: grids.extend(grid( 'xz' , (u, v), width, height, w + depth, w_s, h_s)) if '-x' in plane: grids.extend(grid( 'yz' , (w, v), depth, height, u, d_s, h_s)) if '+x' in plane: grids.extend(grid( 'yz' , (w, v), depth, height, u + width, d_s, h_s)) return np.array(grids) canvas = figure() axes = Axes3D(canvas) quads = cube(width_segments = 4 , height_segments = 4 , depth_segments = 4 ) # You can replace the following line by whatever suits you. Here, we compute # each quad colour by averaging its vertices positions. RGB = np.average(quads, axis = - 2 ) # Setting +xz and -xz plane faces to black. RGB[RGB[..., 1 ] = = 0 ] = 0 RGB[RGB[..., 1 ] = = 1 ] = 0 # Adding an alpha value to the colour array. RGBA = np.hstack((RGB, np.full((RGB.shape[ 0 ], 1 ), . 85 ))) collection = Poly3DCollection(quads) collection.set_color(RGBA) axes.add_collection3d(collection) show() |
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原文链接:https://blog.csdn.net/weixin_44853840/article/details/123794474