Generate a triangle from a set of specified set variables.

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.

Answer 1

[Image Analyst]

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

[Yashlin Naidoo]

Thank you!!

Answer 2

[Image Analyst]

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.

[Yashlin Naidoo]

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