opengl - does gluLookAt has impact on glRotate/glTranslate/glScale? -


मेरे पास निम्न कोड है: 

  glMatrixMode (GL_MODELVIEW); glLoadIdentity (); GluLookAt (0.0, 0.0, 10.0, 0.0, 0.0, 0.0, 0.0, 0.1, 20.0); ग्लोटाटेफ़ ((जीएल फ़्लोट) 45, 0.0, 1.0, 0.0); glRectf (-1, -1,1,1);

आयत को y- अक्ष के आसपास घुमाया जाएगा मेरा परिणाम दिखाता है, यह अभी भी मेरी खिड़की के केंद्र में है। लेकिन क्यों?

जैसा कि मुझे पता है, फ़ंक्शन gluLookAt संशोधित मोडल्यूवर मैट्रिक्स और यह अंदर glTranslate को कॉल करता है, इसलिए उपरोक्त का सटीक व्यवहार है glRotatef कॉल करें? रोटेशन त्रिज्या 10 क्यों नहीं है? (10 ग्लू लुक एट के पास तीसरा प्रिम है)

मैं उस कारण की तलाश कर रहा था जिसके कारण मेरी ऑब्जेक्ट ' जब मैंने आपको कोड देखा तो स्वयं को घुमाएंगे। मेरे कोड में, gluLookAt से पहले मैं glRotatef डाल दिया है, जो आपके कोड में एकमात्र अंतर है मैंने ऑर्डर बदलने की कोशिश की और इसे स्व-रोटेट करना शुरू कर दिया। अपने कोड में दो फ़ंक्शन के क्रम को बदलने की कोशिश करें और देखें कि यह कैसा दिखता है। मुझे वास्तव में इसका कारण नहीं पता है आशा है कि कोई इसे समझा सकता है।


Comments

Post a Comment

Popular posts from this blog

python - rpy2 import is not working -

When I try to import rpy2, I get an error. Here is the code and error & gt; & Gt; & Gt; Import Traceback (Most Recent Call Final): File "C: \ PF \ WinPython-64bit-3.3.3.3 \ python-3.3.3.amd64 \ lib \ site-packages \ IPython \ core \ interactiveshell.py", line 2828 In the file, "ipython-input-148-c258a0f70d44" gt; Row 1, & lt; modules & gt; Import pandas.rpy.common file in runcode ajl (code_obj, self.user_global_ns, self.user_ns) file " C: \ PF \ WinPython-64bit-3.3.3.3 \ python-3.3.3.amd64 \ lib \ site-packages \ pandas \ rpy \ common.py ", line 14, in & lt; modules & gt; Rpy2.robjects .packages Import Import Import Import: A module name 'rpy2' What could be the problem? I Python Version 3.3.3 and PANDAS Version 0.13.1 Edit Tried to install rpy2 separately I get an error using python setup.py install which is not the module popen3 in OS . Running the site of Christophe Gohalke properly insta...
Read more

c++ - How to load a bitmap from file into the samples buffer -

I am trying to add text to the bitmap obtained from the DirectShow filter. First of all I tried to use gdiplus, but that was not working so now I just call a net program that connects to bitmap. The problem is that I do not know how to reload the bitmap from a file into buffer samples in a direct save. Here is my code: Bitmap BMP (640, 480, 2560, 1379773, Newbuffer); // save clsid pngClsid; GetEncoderClsid (L "image / PNG", & amp; pngClsid); WCHAR * file = L "D: \\ temp \\ sample.bmp"; Bmp.Save (file, & amp; pngClsid, NULL); Std :: string command ("D: \\ yourcontrol \\ bitmapDraw.exe D: \\ temp \\ sample.bmp \" test text \ "D: \\ yourcontrol \\ out.bmp"); // Heripal system (command.c_str ()); // Load Bitmap BMP 2 (D: \\ Your Control \\ Out.bmp); How do I forward bitmap from file to sample? Media samples are a part of the agreement between filters on specific pin connections. You usually do not load media samples until y...
Read more

javascript - How to get MySQL query result returned using $.ajax -

I'm trying to update is a JavaScript, when you hover over an image, a devi Floats near your mouse, this information is stored in an .js file as an array, for example. text [0] = ["image 1", "data1"] text [1] = ["image2", "data2"] In the past, if the array change / add / delete the data it will need to upload a new copy .js file, if the data was attached / deleted, then the new image needs a change in .dwt file Which can update each file using the .dwt file as the main template, which can result in 20+ pages They are uploaded I thought that I can automate this record by using the database and using the database if they are active and use only mysql queries which are active, such a black app The database can be added and disabled, thus eliminating the need for every soft upload of the file. To do this, I had planned to store the information in the database and create the above array based on the results, by researching how to us...
Read more