环境介绍

python3.8

numpy

matplotlib

一、绘制一个三维的爱心

关于这一步,我采用的是大佬博客中的最后一种绘制方法。当然,根据我的代码习惯,我还是稍做了一点点修改的。

class Guess:    def __init__(self, bbox=(-1.5, 1.5), resolution=50, lines=20) -> None:        """        bbox: 控制画格的大小        resolution: 控制爱心的分辨率        lines: 控制等高线的数量        """        self.xmin, self.xmax, self.ymin, self.ymax, self.zmin, self.zmax = bbox*3        A = np.linspace(self.xmin, self.xmax, resolution)        self.B = np.linspace(self.xmin, self.xmax, lines)        self.A1, self.A2 = np.meshgrid(A, A)            def coordinate(self, x, y, z):        """        生成坐标        """        return (x**2+(9/4)*y**2+z**2-1)**3-x**2*z**3-(9/80)*y**2*z**3    def draw(self, ax):        """        绘制坐标        """        for z in self.B:            X, Y = self.A1, self.A2            Z = self.coordinate(X, Y, z)+z            cset = ax.contour(X, Y, Z, [z], zdir='z', colors=('pink',))        for y in self.B:            X, Z = self.A1, self.A2            Y = self.coordinate(X, y, Z)+y            cset = ax.contour(X, Y, Z, [y], zdir='y', colors=('pink',))        for x in self.B:            Y, Z = self.A1, self.A2            X = self.coordinate(x, Y, Z) + x            cset = ax.contour(X, Y, Z, [x], zdir='x', colors=('pink',))    def run(self):        fig = plt.figure()        ax = fig.add_subplot(projection='3d')        ax.set_zlim3d(self.zmin, self.zmax)        ax.set_xlim3d(self.xmin, self.xmax)        ax.set_ylim3d(self.ymin, self.ymax)        plt.show()

但是这可以达到我们想要的效果吗?

显然不能!于是我们开始加入亿点点细节!

二、细节点1.加入时间序列

想要心脏跳起来,我们就需要有时间维度的变化。那怎么做最合理呢?这里仅展示修改的代码位置。

代码如下(示例):

class Guess:    def __init__(self, bbox=(-1.5, 1.5), resolution=50, lines=20) -> None:        plt.ion()                                         # 开启画布的动态图模式        self.xmin, self.xmax, self.ymin, self.ymax, self.zmin, self.zmax = bbox*3        self.time = time.time()                           # 这里有一个衡量的时间坐标,很合理吧        A = np.linspace(self.xmin, self.xmax, resolution)        self.B = np.linspace(self.xmin, self.xmax, lines)        self.A1, self.A2 = np.meshgrid(A, A)    def run(self, count):        """        加入count是我们想循环的次数        """        fig = plt.figure()        for i in range(count):            plt.clf()                               # 每次清除画布            ax = fig.add_subplot(projection='3d')            ax.set_zlim3d(self.zmin, self.zmax)            ax.set_xlim3d(self.xmin, self.xmax)            ax.set_ylim3d(self.ymin, self.ymax)            times = time.time()-self.t/ime          # 计算画布的当前时间状态            self.draw(ax, coef)            plt.show()

2.加入心脏的跳动

心脏的跳动当然不会是线性的了,我们需要心脏的跳动是有层次感的,并且还是可以做往返运动的。

emmmmm… 这么说来,cos是不是就是做这个用的?

于是…
代码如下(示例):

def __init__(self, bbox=(-1.5, 1.5), resolution=50, lines=20, scale=1.2) -> None:        """        scale: 心脏缩放的系数        """        self.xmin, self.xmax, self.ymin, self.ymax, self.zmin, self.zmax = bbox*3        plt.ion()         self.scale = scale   # scale: 心脏缩放的系数 设置为全局变量        self.time = time.time()        A = np.linspace(self.xmin, self.xmax, resolution)        self.B = np.linspace(self.xmin, self.xmax, lines)        self.A1, self.A2 = np.meshgrid(A, A)    def draw(self, ax, coef):        """        coef: 使得心脏可以按照时间跳动        """        for z in self.B:            X, Y = self.A1, self.A2            Z = self.coordinate(X, Y, z)+z            cset = ax.contour(X * coef, Y * coef, Z * coef, [z * coef], zdir='z', colors=('pink',))        for y in self.B:            X, Z = self.A1, self.A2            Y = self.coordinate(X, y, Z)+y            cset = ax.contour(X * coef, Y * coef, Z * coef, [y * coef], zdir='y', colors=('pink',))        for x in self.B:            Y, Z = self.A1, self.A2            X = self.coordinate(x, Y, Z) + x            cset = ax.contour(X * coef, Y * coef, Z * coef, [x * coef], zdir='x', colors=('pink',))    def run(self, count):        """        加入count是我们想循环的次数        """        fig = plt.figure()        for i in range(count):            plt.clf()                               # 每次清除画布            ax = fig.add_subplot(projection='3d')            ax.set_zlim3d(self.zmin, self.zmax)            ax.set_xlim3d(self.xmin, self.xmax)            ax.set_ylim3d(self.ymin, self.ymax)            times = time.time()-self.time            coef = np.cos(times) * (self.scale-1) + 1            # coef 是用来放缩心脏的大小的,加入cos来使它有节奏的跳动            self.draw(ax, coef)            plt.pause(0.01)            plt.show()

很好,这样我们就有了一个可以跳动的心脏,那么到这结束了嘛?

一个好的展示

当然没有!我们希望对象看到的时候他稍微有点东西,所以让它跳动却不能改变方向,岂不是看的不够全面?所以我们在加最后亿点点细节:

    def run(self, count):        fig = plt.figure()        for i in range(count):            plt.clf()            ax = fig.add_subplot(projection='3d')            ax.set_title("你对象的名字?")              # 加上你对象的小name            ax.set_zlim3d(self.zmin, self.zmax)            ax.set_xlim3d(self.xmin, self.xmax)            ax.set_ylim3d(self.ymin, self.ymax)            times = time.time()-self.time            ax.view_init(10, 100+np.cos(times) * 10)   # 让三维坐标图可以变换坐标展示            coef = np.cos(times) * (self.scale-1) + 1            self.draw(ax, coef)            plt.pause(0.01)  # 让绘制出来的心脏可以显示            plt.show()

完整代码

import timeimport numpy as npimport matplotlib.pyplot as pltclass Guess:    def __init__(self, bbox=(-1.5, 1.5), resolution=50, lines=20, scale=1.2) -> None:        self.xmin, self.xmax, self.ymin, self.ymax, self.zmin, self.zmax = bbox*3        plt.ion()         self.scale = scale        self.time = time.time()        A = np.linspace(self.xmin, self.xmax, resolution)        self.B = np.linspace(self.xmin, self.xmax, lines)        self.A1, self.A2 = np.meshgrid(A, A)        Python交流群:748989764    def coordinate(self, x, y, z):        return (x**2+(9/4)*y**2+z**2-1)**3-x**2*z**3-(9/80)*y**2*z**3    def draw(self, ax, coef):        for z in self.B:            X, Y = self.A1, self.A2            Z = self.coordinate(X, Y, z)+z            cset = ax.contour(X * coef, Y * coef, Z * coef, [z * coef], zdir='z', colors=('pink',))        for y in self.B:            X, Z = self.A1, self.A2            Y = self.coordinate(X, y, Z)+y            cset = ax.contour(X * coef, Y * coef, Z * coef, [y * coef], zdir='y', colors=('pink',))        for x in self.B:            Y, Z = self.A1, self.A2            X = self.coordinate(x, Y, Z) + x            cset = ax.contour(X * coef, Y * coef, Z * coef, [x * coef], zdir='x', colors=('pink',))    def run(self, count):        fig = plt.figure()        for i in range(count):            plt.clf()            ax = fig.add_subplot(projection='3d')            ax.set_title("2LiuYu")            ax.set_zlim3d(self.zmin, self.zmax)            ax.set_xlim3d(self.xmin, self.xmax)            ax.set_ylim3d(self.ymin, self.ymax)            times = time.time()-self.time            ax.view_init(10, 100+np.cos(times) * 10)            coef = np.cos(times) * (self.scale-1) + 1            self.draw(ax, coef)            plt.pause(0.01)            plt.show()if __name__ == '__main__':    demo = Guess()    demo.run(1000)