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Rotating text to 90 degrees

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Ananya
Ananya on 16 Feb 2024
Answered: Adam Danz on 16 Feb 2024
I want to design an experiment in Psychtoolbox in which the alphabet T is rotated to 90 degrees.
By rotated to 90 degrees, I mean that the alphabet T (vertical) should appear in such a way that the head of the T should be either in the left or right direction.
Here is the code that I made so far but I do not know how to proceed.
% Initialize Psychtoolbox
PsychDefaultSetup(2);
Screen('Preference', 'SkipSyncTests', 1); % Skip sync tests for better compatibility
% Get the screen number
screenNumber = max(Screen('Screens'));
% Open a window
[windowPtr, windowRect] = PsychImaging('OpenWindow', screenNumber, 0); % 0 is black background
% Set text parameters
textSize = 50;
textColor = [255 255 255]; % White color
fontName = 'Arial';
% Define the alphabet 'T'
alphabetT = 'T';

Answers (2)

Star Strider
Star Strider on 16 Feb 2024
Edited: Star Strider on 16 Feb 2024
I’ve never used PsychToolbox, however that would be relatively straightforward in MATLAB graphics —
alphabetT = 'T';
figure
text(0.5, 0.5, alphabetT, 'FontSize',50)
set(gca, 'Visible','off')
figure
text(0.5, 0.5, alphabetT, 'FontSize',50, 'Rotation',90)
set(gca, 'Visible','off')
It might be necessaary to add an axes reference to the text call. See the documentation reference in ax for details.
EDIT — Corrected typographical errors.
.

Adam Danz
Adam Danz on 16 Feb 2024
It looks like you're working with embedded text.
You may find this resource helpful: https://peterscarfe.com/rotatingText.html
It contains a demo for rotating text in psychtoolbox by drawing the text to a texture and then to the screen.

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