hello. i want to play artoolkit with panda recently because i found it interested. i searched the whole forum, got ThomasEgi’e sample from this thread https://discourse.panda3d.org/viewtopic.php?t=6069, and modify it to run under my windowXP. the problem is the virtual object didn’t appear at the pattern center. there is a snap screen below. i also found some thread talked about this problem https://discourse.panda3d.org/viewtopic.php?t=6508 but no solution. another guy use some tricky method to adjust the camera’s positon in this https://discourse.panda3d.org/viewtopic.php?t=6069. i don’t understand, i’ve tried both the original c version artoolkit sample and the OSGART ARToolKit for OpenSceneGraph sample, they didn’t have this problem using the default config. can anyone explain this?
and another question is the artoolkit object in panda just exposed 5 methods for us, is it sufficient to do complex things multiple patterns detect something like that.
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here is my code
from pandac.PandaModules import *
loadPrcFileData("", "auto-flip 1") #usualy the drawn texture lags a bit behind the calculted positions. this is a try to reduce the lag.
loadPrcFileData("", "win-size 640 480")
from direct.directbase import DirectStart
from direct.task import Task
option = WebcamVideo.getOption(4) # 640x480 @ 15fps mine cam is logitech quickcam mini for notebook
cursor = option.open()
tex = Texture('movie')
tex.setTexturesPower2(0)
cursor.setupTexture(tex)
#create a card which shows the image captured by the webcam.
cm = CardMaker("background-card")
cm.setFrame(-1, 1, 1, -1)
card = render2d.attachNewNode(cm.generate())
card.setTexture(tex)
#set the rendering order manually to render the card-with the webcam-image behind the scene.
base.cam.node().getDisplayRegion(0).setSort(20)
#load a model to visualize the tracking
axis = loader.loadModel("yup-axis")
axis.reparentTo(render)
axis.setScale(.2)
#initialize artoolkit, base.cam is our camera ,
#the camera_para.dat is the configuration file for your camera. this one comes with the artoolkit installation.
#last paremeter is the size of the pattern in panda-units.
ar = ARToolKit.make(base.cam, "./camera_para.dat", 1)
#attach the model to a pattern so it updates the model's position relative to the camera each time we call analyze()
ar.attachPattern("./patt.kanji", axis)
#updating the models positions each frame.
def updatePatterns(task):
if cursor.ready():
cursor.fetchIntoTexture(0, tex, 0)
ar.analyze(tex, False)
return Task.cont
taskMgr.add(updatePatterns, "update-patterns")
run()
do you mean set it like