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坛里面已经有网友发的取模软件:
http://www.ourdev.cn/bbs/bbs_content.jsp?bbs_sn=4571756&bbs_page_no=1&bbs_id=9999
但是是EXE二进制文件,不是太方便用户根据自己的实际需求做出修改。
现把自己在matlab下写的取模程序贴出来,方便能用到的网友。
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% test_led_wheel
% for your reference
ri = 0.1;
div_p = 128;
% div_p = 256;
div_r = 24;
% div_r = 36;
bit = 4;
% read RGB from img
img_w = size(img, 2);
img_h = size(img, 1);
img_cx = round(img_w / 2 - 1);
img_cy = round(img_h / 2 - 1);
img_r = min(img_cx, img_cy);
figure;
hold on;
axis equal;
whitebg('k');
xlim([-1.1, 1.1]);
ylim([-1.1, 1.1]);
for i=1:div_p
% plot([ri*cos(2*pi*i/div_p), cos(2*pi*i/div_p)], ...
% [ri*sin(2*pi*i/div_p), sin(2*pi*i/div_p)]);
for j=1:div_r
pr = ((1-ri)/(div_r-1)*(j-1)+ri);
px1 = cos(2*pi*(i-1)/div_p);
px2 = cos(2*pi*(i)/div_p);
py1 = sin(2*pi*(i-1)/div_p);
py2 = sin(2*pi*(i)/div_p);
% pc = [i/div_p,j/div_r,(2-i/div_p-j/div_r)/2];
ix = min(round(img_cx + img_r*px1*pr)+1, img_w);
iy = min(round(img_cy + img_r*py1*pr)+1, img_h);
icr = img(iy, ix, 1);
icg = img(iy, ix, 2);
icb = img(iy, ix, 3);
pc = single([icr, icg, icb]/2^(8-bit)) * 2^(8-bit) / 256;
plot( pr * px1, -pr * py1, '.', ...
'MarkerEdgeColor', pc );
end;
end;
% byte = div_r * div_p * bit / 8
% dw = 0.7; % m
% v = 40; % km/h
% n = v/3.6/dw/pi % rps
% dt = 1/n/div_p * 1000 % ms
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效果图:
效果图1 (原文件名:fnems.jpg)
效果图2,这张离近看不清的,要站在离屏幕远一点的地方才能看出效果 (原文件名:fnems2.png)
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阿莫论坛20周年了!感谢大家的支持与爱护!!
一只鸟敢站在脆弱的枝条上歇脚,它依仗的不是枝条不会断,而是自己有翅膀,会飞。
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