#1
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Create Two sequential tasks for images in Vizard
I'm new in Vizard. I'm trying to create a simple code to perform two tasks sequentially for a specific time set:
A black image for 0.8 seconds A sequence of images (from a folder) taken randomly, for 1.5 seconds. I can perform these task separately, but I can't merge together. Suggestions are very appreciated, thank you Code:
import viz import vizact import vizinfo import random viz.setMultiSample(4) viz.fov(60) viz.go() vizinfo.InfoPanel() viz.clearcolor(viz.BLACK) FRAME_RATE = 0.667 # in Hertz r = list(range(7)) random.shuffle(r) movieImages = viz.cycle( [ viz.addTexture('sequence_IMG/img%d.jpg' % i) for i in r ] ) screen = viz.addTexQuad() screen.setPosition([0, 1.82, 1.5]) screen.setScale([4.0/3, 1, 1]) def executeExperiment(): for trialNumber in range(3): yield Dark() #wait for doTrial to finish yield vizact.ontimer(1.0/FRAME_RATE, NextMovieFrame) print('Trial Done: ', trialNumber) print('done with experiment') #Setup timer to swap texture at specified frame rate def NextMovieFrame(): screen.texture(movieImages.next()) def Dark(): yield viztask.waitTime(1) #wait for 1 second viz.clearcolor(viz.BLACK) vizact.ontimer(1.0/FRAME_RATE, NextMovieFrame) viztask.schedule(executeExperiment()) |
#2
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Use viztask.waitTime instead of vizact.ontimer to wait inside of a task function. It seems like you can place the sequential actions in a single task function:
Code:
blankTexture = viz.addBlankTexture(size=(100,100)) def executeExperiment(): for trialNumber in range(3): # Show blank texture for one second screen.texture(blankTexture) yield viztask.waitTime(1) # Show movie texture for 1.5 seconds screen.texture(movieImages.next()) yield viztask.waitTime(1.5) print('Trial Done: ', trialNumber) print('done with experiment') |
#3
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Display random images from a folder
Thank you so much!
It is also possible to display the image from a folder randomly without rename all the images in the folder? an alternative solution for this 3 lines Code:
r = list(range(7)) random.shuffle(r) movieImages = viz.cycle( [ viz.addTexture('sequence_IMG/img%d.jpg' % i) for i in r ] ) |
Tags |
images, tasks, vizard 7 |
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