Python&Matlab实现樱花的绘制

1.锦短情长

为什么选择这个标题，借鉴了一封情书里面的情长纸短，还吻你万千。

锦短情长

都只谓人走茶凉，怎感觉锦短情长？

一提起眼泪汪汪，是明月人心所向？

2. 一场樱花雨(Matlab)

function pingba
hold on,axis equal
axis(0.5+[-10,50,0,50])
set(gca,'xtick',[],'ytick',[],'xcolor','w','ycolor','w')
set(gca,'color',[0.5020    0.5020    0.5020])

length_trunk=6;
width_trunk=4;
k1=0.9;
k2=0.8;
number_branch=15;
alp=pi/10;
length_branch=k1*length_trunk;
width_branch=k2*width_trunk;
trunk=[12,0;12,length_trunk];
plot(trunk(:,1),trunk(:,2),'color',[0 0 0],'Linewidth',width_trunk)
begins=[trunk(2,:),pi/2,1];
grow=begins;
plotdata=[0 0 0 0 0 0 0 0];
plotdata(1,:)=[];
for i=1:number_branch
   control=randi(25,[length(grow(:,1)),1])>=10;
   ag=grow(:,3);
   l=length(ag);
   parta=[length_branch.*k1.^grow(:,4).*cos(ag+ones(l,1)*alp),length_branch.*k1.^grow(:,4).*sin(ag+ones(l,1)*alp),ones(l,1)*alp,ones(l,1)];
   partb=[length_branch.*k1.^grow(:,4).*cos(ag-ones(l,1)*alp),length_branch.*k1.^grow(:,4).*sin(ag-ones(l,1)*alp),-ones(l,1)*alp,ones(l,1)];
   parta2=[0.8.*length_branch.*k1.^grow(:,4).*cos(ag),0.8.*length_branch.*k1.^grow(:,4).*sin(ag),zeros(l,1),ones(l,1)];
   partb2=[0.8.*length_branch.*k1.^grow(:,4).*cos(ag),0.8.*length_branch.*k1.^grow(:,4).*sin(ag),zeros(l,1),ones(l,1)];
   parta=control.*parta+(1-control).*parta2;
   partb=control.*partb+(1-control).*partb2;
   parta=parta+grow;
   partb=partb+grow;
   congress=[parta;partb];
   grow=[grow;grow];
   judge=[grow,congress];
   judge=unique(judge,'rows');
   grow=judge(:,5:end);
   plotdata=[plotdata;judge];
end
for i=1:number_branch
   temp_w=width_branch*0.8^i;
   temp_branch=plotdata(plotdata(:,4)==i,:);
   plx=[temp_branch(:,1),temp_branch(:,5)];
   ply=[temp_branch(:,2),temp_branch(:,6)];
   plx=plx';ply=ply';
   plot(plx,ply,'color',[0 0 0]+i*[0.3020 0.3020 0.3020]./number_branch,'Linewidth',temp_w)
end

bloom_pos=plotdata(plotdata(:,8)==number_branch+1,[5,6]);
scatter(bloom_pos(:,1),bloom_pos(:,2),10,'CData',[0.8549    0.6824    0.6824])
bloom_pos=plotdata(plotdata(:,8)==number_branch,[5,6]);
scatter(bloom_pos(:,1),bloom_pos(:,2),8,'CData',[0.7451    0.5961    0.5961].*0.97)
end

3.樱花树(Python)

import turtle as T
import random
import time

#=======画樱花的躯干(60,t)===============
T.title('凋落的樱花')
def Tree(branch, t):
   time.sleep(0.0005)
   if branch > 3:
       if 8 <= branch <= 12:
           if random.randint(0, 2) == 0:
               t.color('snow')  # 白
           else:
               t.color('lightcoral')  # 淡珊瑚色
           t.pensize(branch / 3)
       elif branch < 8:
           if random.randint(0, 1) == 0:
               t.color('snow')
           else:
               t.color('lightcoral')  # 淡珊瑚色
           t.pensize(branch / 2)
       else:
           t.color('sienna')  # 赭(zhě)色
           t.pensize(branch / 10)  # 6
       t.forward(branch)
       a = 1.5 * random.random()
       t.right(20 * a)
       b = 1.5 * random.random()
       Tree(branch - 10 * b, t)
       t.left(40 * a)
       Tree(branch - 10 * b, t)
       t.right(20 * a)
       t.up()
       t.backward(branch)
       t.down()

#=============掉落的花瓣===================
def Petal(m, t):
   for i in range(m):
       a = 200 - 400 * random.random()
       b = 10 - 20 * random.random()
       t.up()
       t.forward(b)
       t.left(90)
       t.forward(a)
       t.down()
       t.color('lightcoral')  # 淡珊瑚色
       t.circle(1)
       t.up()
       t.backward(a)
       t.right(90)
       t.backward(b)

#=======绘图区域============
t = T.Turtle()
# 画布大小
w = T.Screen()
t.hideturtle()  # 隐藏画笔
t.getscreen().tracer(5, 0)
w.screensize(bg='wheat')  # wheat小麦
t.left(90)
t.up()
t.backward(150)
t.down()
t.color('sienna')

#=====画樱花的躯干===========
Tree(60, t)
# 掉落的花瓣
Petal(200, t)
w.exitonclick()

来源：https://blog.csdn.net/weixin_46039719/article/details/124020770