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Type: Posts; User: rakeshthp

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  1. Replies
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    Nevermind, I found the problem. The initial state...

    Nevermind, I found the problem. The initial state of the system had data->zoomLvl == G_mapZoom causing the IBO not to be allocated/filled.
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    include path of il files into ur project

    include path of il files into ur project
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    Ya right. That's true. But I don't think it...

    Ya right. That's true. But I don't think it loading entire image data into memory is sufficient. Paging to the disk is very much needed. Isn't it? Well, I was going through quadtrees recently, which...
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    I work on the rack server. The development is...

    I work on the rack server. The development is being done on the server. It is Dell Poweredge Rack server with windows 2008 server, enterprise edition. I tried upgrading the graphics driver, but my...
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    I'm sorry, I didn't mention it before. Yes I have...

    I'm sorry, I didn't mention it before. Yes I have zoom in and out, pan and rotate.


    I have two systems. One for development and other for testing. The development system has max texture...
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    As of now, I am trying to load images from the...

    As of now, I am trying to load images from the system disk. With the technique I explained above, I am able to load images of resolution (approx upto) 6000x6000. I have an high resolution image of...
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    Ok that is what is happening. I have divided the...

    Ok that is what is happening. I have divided the image data(pixel data) into 'n' chunks of size 1024x1024. And I have bound those chunks to that many textures. What is happening is after certain m...
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    Let me put down what I understood. Suppose, I...

    Let me put down what I understood. Suppose, I have a card that supports max texture resolution of 1024x1024. So is it that I can allocate I can allocate 50 textures of size 1024x1024, provided I have...
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    Do you mean that we can have any number of...

    Do you mean that we can have any number of textures at a time? i.e. array of 'n' textures??

    Thanks
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    rendering large images

    Hello,

    I'm trying to render images using OpenGL. To begin with I took a very small image and rendered it using glDrawPixels. I did get the desired results but I observed that the output image used...
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    That is an SDK for Gaming application. I searched...

    That is an SDK for Gaming application. I searched for octrees in source code, but failed to find it. I searched in their forum, and it said, they use octrees.
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    Info about Octrees..!!

    Hello all,

    I have been reading about the use of octrees for efficiently storing high volume of data and rendering them in opengl. I went through several articles. I haven't found how to render...
  13. I tried doing that. With this change, if part of...

    I tried doing that. With this change, if part of the object rendered using glDrawPixels() moves out of the viewport or window screen, entire object becomes invisible. How do I overcome this?

    Thanks
  14. oglft fails to render properly with glDrawPixels

    Hello,

    I am working on a scientific visualization application using opengl. I also use additional library called Global Mapper. Now Global Mapper doesn't have rendering interface with OpenGL...
  15. Below is my code for screentoworld function ...

    Below is my code for screentoworld function


    EVector3 ScreenToWorld(int mouseX, int mouseY)
    {
    glGetDoublev(GL_MODELVIEW_MATRIX, modelview);
    glGetDoublev(GL_PROJECTION_MATRIX,...
  16. I'm using gluUnproject to convert screen...

    I'm using gluUnproject to convert screen coordinate to world coordinate.. z value is coming from unproject function..
  17. Hi, Sorry for the late reply. I was stuck up...

    Hi,

    Sorry for the late reply. I was stuck up with some other work and so this project was kept on hold. Coming to the point, this is what I did:

    OnMouseDown event:

    firstVector =...
  18. I'm sorry. I might have not conveyed my...

    I'm sorry. I might have not conveyed my requirements properly. How to compute the angle of rotation from the mouse events?

    @wmchiew: Are you using Orthographics projection?

    Thanks
  19. I see. What you explained is rotating the model...

    I see. What you explained is rotating the model isn't it? I think the previous code does give the rotation, not by rotating the model, but by rotating the camera in opposite direction. That's why I...
  20. I also don't know. Saw it in one example and...

    I also don't know. Saw it in one example and tried to attempt it. Well, if this is wrong, then can you point me to some tutorials and/or examples for mouse event based 3D rotation?

    Thanks &...
  21. How to rotate entire scene based on mouse events?

    Hello,

    I need to perform rotation of the canvas or scene based on mouse click and drag. I am still not sure whether the method I've used for computing the rotation angle based on mouse events is...
  22. Thanks a lot Paul. That really helped me a lot....

    Thanks a lot Paul. That really helped me a lot. Well, I would need your advice later stage also. Because presently this is for a two dimensional grid in a single plane (flat). For 3d grid whether it...
  23. @Roaoul Thanks for the explaination. Firstly,...

    @Roaoul

    Thanks for the explaination. Firstly, I am sorry for improperly presenting what I require. The car's post was just an example. What I actually need is to render vector plot (quiver plot)....
  24. @Roaoul Are you trying to explain the same thing...

    @Roaoul
    Are you trying to explain the same thing what carmine explained?
  25. Yes. I agree, and that's why I want to scale the...

    Yes. I agree, and that's why I want to scale the arrows as the camera moves front and back.

    Thanks & regards

    Rakesh Patil
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