matlab如何画五星红旗

x = x + centerPos(1);

y = y + centerPos(2);

主程序

1

paintFSRF_script.m

程序是画静态的五星红旗，并将图像以

''

保存在当前目录 下。这个五

星红旗的比例是按照《中华人民共和国国旗制法说明》绘制的

第一行是调整国旗分辨率的，可以自行修改，但是要保持

3:2

的比例

。

flag_dimension_in_pixel = [600 400];

figure_leftbottom_pos = [100 100];

bkg_color = [1 0 0];

star_color = [1 1 0];

flag_horiz_units_num = 30;

flag_verti_units_num = 20;

star_vertices_x = zeros(10, 5);

star_vertices_y = zeros(10, 5);

stars(5).center_pos = [];

stars(1).center_pos = [5 15];

stars(1).radius = 3;

stars(1).orientation = 0;

stars(2).center_pos = [10 18];

stars(2).radius = 1;

stars(2).orientation = 0;

stars(3).center_pos = [12 16];

stars(3).radius = 1;

stars(3).orientation = 0;

stars(4).center_pos = [12 13];

stars(4).radius = 1;

stars(4).orientation = 0;

stars(5).center_pos = [10 11];

stars(5).radius = 1;

stars(5).orientation = 0;

%

类似于

c#

的自定义函数调用？

for i = 2:5

dists = deal(stars(i).center_pos - stars(1).center_pos);

stars(i).orientation = atan(dists(2)/dists(1)).*180/pi + 90;

end

%% Prepare the background

flag_figure = figure('Units', 'pixels', ...

'Position', [figure_leftbottom_pos, flag_dimension_in_pixel]);

flag_axes = axes('Parent', flag_figure, 'Units','pixels', ...

'Position', [1 1 flag_dimension_in_pixel], 'Color', [1 0 0]);

set(flag_axes,

'XLim',

[0

flag_horiz_units_num],

'YLim',

flag_verti_units_num]);

rectangle('Position', [0 0 flag_horiz_units_num flag_verti_units_num], ...

'FaceColor', bkg_color ,'EdgeColor' ,bkg_color);

set(flag_axes, 'Visible','off');

%% Get the Star's Vertices

for i = 1:5

[star_vertices_x(:,i) star_vertices_y(:, i)] = ...

GetPentag ramVertices(stars(i).center_pos, ...

stars(i).radius,stars(i).orientation);

end

star_handles = patch(star_vertices_x, star_vertices_y, star_color);

set(star_handles, 'EdgeColor', star_color);

flag_image = frame2im(getframe(flag_figure));

imwrite(flag_image, '');

%

如装有

Image Processing Toolbox

的话，解注下面几行可以保存图形文件

%

% [filename, pathname, filterindex] = ...

% uiputfile('*','Save the Nation Flag as...')

%

% imwrite(flag_image, [pathname filename]);

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主程序

2

paintFlyingFSRF_script.m

程序是飘扬的五星红旗，效果是

3D

实时渲染 出来的，所以速度有点慢，机器够牛的同学可

以试着将第一行的分辨率改大

flag_size = [600 400]; % Change as you see fit

flag_dimension_in_pixel = flag_size; %[600 400];

figure_leftbottom_pos = [100 100];

bkg_color = [1 0 0];

star_color = [1 1 0];

flag_horiz_units_num = 30;

flag_verti_units_num = 20;

star_vertices_x = zeros(10, 5);

star_vertices_y = zeros(10, 5);

stars(5).center_pos = [];

stars(1).center_pos = [5 15];

stars(1).radius = 3;

stars(1).orientation = 0;

stars(2).center_pos = [10 18];

stars(2).radius = 1;

stars(2).orientation = 0;

stars(3).center_pos = [12 16];

stars(3).radius = 1;

stars(3).orientation = 0;

stars(4).center_pos = [12 13];

stars(4).radius = 1;

stars(4).orientation = 0;

stars(5).center_pos = [10 11];

stars(5).radius = 1;

stars(5).orientation = 0;

for i = 2:5

dists = deal(stars(i).center_pos - stars(1).center_pos);

stars(i).orientation = atan(dists(2)/dists(1)).*180/pi + 90;

end

%% Prepare the background

flag_figure = figure('Units', 'pixels', ...

'Position', [figure_leftbottom_pos, flag_dimension_in_pixel]);

flag_axes = axes('Parent', flag_figure, 'Units','pixels', ...

'Position', [1 1 flag_dimension_in_pixel], 'Color', [1 0 0]);

set(flag_axes,

'XLim',

[0

flag_horiz_units_num],

'YLim',

flag_verti_units_num]);

rectangle('Position', [0 0 flag_horiz_units_num flag_verti_units_num], ...

'FaceColor', bkg_color ,'EdgeColor' ,bkg_color);

set(flag_axes, 'Visible','off');

%% Get the Star's Vertices

for i = 1:5

[star_vertices_x(:,i) star_vertices_y(:, i)] = ...

GetPentag ramVertices(stars(i).center_pos, ...

stars(i).radius,stars(i).orientation);

end

star_handles = patch(star_vertices_x, star_vertices_y, star_color);

set(star_handles, 'EdgeColor', star_color);

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