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Generate a triangle from a set of specified set variables.

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I need to generate a triangle that will be able to be user controlled with input length of base in pixels and both base angles in degrees.
subplot(2,4,3);
sides = 3;
t = (1/(2*sides):1/(sides):1)*2*pi-pi/3;
x_size=100;
x = x_size*sin(t);
y = x_size*cos(t);
fill(x,y,'black');
axis square;
this is the code I used.

Accepted Answer

Image Analyst
Image Analyst on 10 May 2015
See this snippet. Adapt as you see fit:
% Ask user for two floating point numbers.
defaultValue = {'45.67', '18.91'};
titleBar = 'Enter a value';
userPrompt = {'Enter Angle 1 : ', 'Enter Angle 2: '};
caUserInput = inputdlg(userPrompt, titleBar, 1, defaultValue);
if isempty(caUserInput),return,end; % Bail out if they clicked Cancel.
% Convert to floating point from string.
usersValue1 = str2double(caUserInput{1})
usersValue2 = str2double(caUserInput{2})
% Check for a valid number.
if isnan(usersValue1)
% They didn't enter a number.
% They clicked Cancel, or entered a character, symbols, or something else not allowed.
% Convert the default from a string and stick that into usersValue1.
usersValue1 = str2double(defaultValue{1});
message = sprintf('I said it had to be a number.\nI will use %.2f and continue.', usersValue1);
uiwait(warndlg(message));
end

More Answers (1)

Image Analyst
Image Analyst on 10 May 2015
Why don't you have a user interface where you let the user control the width with a slider? See this framework. http://www.mathworks.com/matlabcentral/fileexchange/24224-magic-matlab-generic-imaging-component Put your code in the slider callback. First get the slider value, then use it in the rest of your code that draws the triangle.
  1 Comment
Yashlin Naidoo
Yashlin Naidoo on 10 May 2015
Since the representation doesn't require that.I just need a code that can be user controlled to input base and two base angles to generate the triangle thats it

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