用Matlab画圆柱圆台圆锥
自己建一个M文件，命名任意，如tu.m
在命令窗口输入：tu
%以下为tu.m文件
clc
clear all
%圆柱
[X,Y,Z]=cylinder(15.7,20);
h=1.22*Z;
surf(X,Y,h);
hold on
%圆台
a=25/180*pi;%可修改
b=12.06/180*pi;%可修改
r=3.2;%可修改
h1=r*sin(a+b)/sin(a-b)*sin(a);
%h1=0.66;
X1=[0 0 1.22];%底面中心坐标
X2=[0 0 1.22+h1];%顶面中心坐标
L2=15.7-2.6/tan(a);
r=[15.7 L2];
n=20;
cyl_color='b';
clod=1;
lines=1;
[cone,EndPlate1,EndPlate2] = Cone(X1,X2,r,n,cyl_color,clod,lines)%调用圆台的函数
%圆锥
[X2,Y2,Z2]=cylinder(L2:-0.2:0);
h2=1.5;%可修改
Z2=h2*Z2;
Z2=Z2+ones(size(Z2))*(1.22+h1);
surf(X2,Y2,Z2);
grid on
cillin%r=0:0.1:3.2;R=0:0.1:15.7;
%alpha=0:pi/20:2*pi;%角度[0,2*pi]
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%x=R*cos(alpha);
%y=R*sin(alpha);
%a=39.0;b=12.06;
%h=1.22+R.*tan(b)+r.*sin(a);
%[x,y]=meshgrid([-4:0.5:4]);
%surf(h)
新建一个M文件，如下命名为Cone.M
function [Cone,EndPlate1,EndPlate2] = Cone(X1,X2,R,n,cyl_color,clod,lines)
%
% This function constructs a cylinder connecting two center points
%
价值观 英文% Usage :
% [Cone,EndPlate1,EndPlate2] = Cone(X1,X2,R,n,cyl_color,clod,lines)
%
% Cone-------Handle of the cone
% EndPlate1------Handle of the Starting End plate
% EndPlate2------Handle of the Ending End plate
% X1 and X2 are the 3x1 vectors of the two points
jogging% R is the radius of the cylinder/cone R(1) = start radius, R(2) = end radius
% n is the no. of elements on the cylinder circumference (more--> refined)
% cyl_color is the color definition like 'r','b',[0.52 0.52 0.52]
% clod=1 for clod cylinder or 0 for hollow open cylinder
% lines=1 for displaying the line gments on the cylinder 0 for only
% surface
%
% Typical Inputs
% X1=[10 10 10];
i miss you是什么意思中文翻译% X2=[35 20 40];
% r=[1 5];
% n=20;
% cyl_color='b';
% clod=1;
% 姘居
% NOTE: There is a MATLAB function "cylinder" to revolve a curve about an
% axis. This "Cylinder" provides more customization like direction and etc雅思口语技巧
%圆台的函数，文件名为Cone.m
% Calculating the length of the Cone
length_cyl=norm(X2-X1);
% Creating 2 circles in the YZ plane
t=linspace(0,2*pi,n)';
xa2=R(1)*cos(t);
xa3=R(1)*sin(t);
xb2=R(2)*cos(t);
xb3=R(2)*sin(t);
% Creating the points in the X-Direction
x1=[0 length_cyl];
% Creating (Extruding) the cylinder points in the X-Directions
xx1=repmat(x1,length(xa2),1);
xx2=[xa2 xb2];%xx2=repmat(x2,1,2);
xx3=[xa3 xb3];%xx3=repmat(x3,1,2);
% Drawing two filled cirlces to clo the cylinderjaclyn smith
if clod==1
hold on
EndPlate1=fill3(xx1(:,1),xx2(:,1),xx3(:,1),'r');
EndPlate2=fill3(xx1(:,2),xx2(:,2),xx3(:,2),'r');
end
% Plotting the cylinder along the X-Direction with required length starting
% from Origin
Cone=mesh(xx1,xx2,xx3);
% Defining Unit vector along the X-direction
unit_Vx=[1 0 0];
% Calulating the angle between the x direction and the required direction
% of Cone through dot product
angle_X1X2=acos( dot( unit_Vx,(X2-X1) )/( norm(unit_Vx)*norm(X2-X1)) )*180/pi;
% Finding the axis of rotation (single rotation) to roate the Cone in
% X-direction to the required arbitrary direction through cross product
axis_rot=cross([1 0 0],(X2-X1) );
% Rotating the plotted Cone and the end plate circles to the required
emotiona% angles
if angle_X1X2~=0 % Rotation is not needed if required direction is along X
rotate(Cone,axis_rot,angle_X1X2,[0 0 0])
if clod==1
rotate(EndPlate1,axis_rot,angle_X1X2,[0 0 0])
rotate(EndPlate2,axis_rot,angle_X1X2,[0 0 0])
end
end
% Till now Cone has only been aligned with the required direction, but
% position starts from the origin. so it will now be shifted to the right
% position
if clod==1
t(EndPlate1,'XData',get(EndPlate1,'XData')+X1(1))
t(EndPlate1,'YData',get(EndPlate1,'YData')+X1(2))
t(EndPlate1,'ZData',get(EndPlate1,'ZData')+X1(3))
t(EndPlate2,'XData',get(EndPlate2,'XData')+X1(1))
t(EndPlate2,'YData',get(EndPlate2,'YData')+X1(2))
t(EndPlate2,'ZData',get(EndPlate2,'ZData')+X1(3))
end
t(Cone,'XData',get(Cone,'XData')+X1(1))
t(Cone,'YData',get(Cone,'YData')+X1(2))
t(Cone,'ZData',get(Cone,'ZData')+X1(3))
% Setting the color to the Cone and the end plates
t(Cone,'AmbientStrength',1,'FaceColor',cyl_color,'FaceLighting','gouraud');%,'EdgeColor','none')
if clod==1石家庄雅思考点
t([EndPlate1 EndPlate2],'AmbientStrength',1,'FaceColor',cyl_color,'FaceLighting','gouraud');%,'EdgeColor','none')
el
EndPlate1=[];
EndPlate2=[];
end
% If lines are not needed making it disapear
if lines==0
t(Cone,'EdgeAlpha',0)
