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annas

  • 2 years ago

write opengl code (function call only) and find composite transformation matrix (the sequence of transformation matrices) in homogeneous form that would produce the same transformation for : scaling a given cube by factor (2,3,4) about given point p(3,1,0)

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  1. annas
    • 2 years ago
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    rotation of given point p(3,1,0) about x axis of angle 90?

  2. amistre64
    • 2 years ago
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    pfft, i got no idea what this is even saying at the moment

  3. annas
    • 2 years ago
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    lol its ok actually we have to make a composite matrix to solve this i m like messed up right now with these question :|

  4. amistre64
    • 2 years ago
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    good luck with it ;)

  5. annas
    • 2 years ago
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    lol thanks :P

  6. KonradZuse
    • 2 years ago
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    Okay well in OpenGl you use a 4x4 augmented matrix, where the first 3x3 matrix has to do with it's rotation, the column matrix 4 is where in the world it is, and the 4th row is the transitioning of the matrix. Since you want a homogeneous matrix you will set the 4th column to all 0's. The 4th row would be your (2,3,4) Now about a point you would set that yourself in the 3x3 I believe as x = 3, y = 1, and z = 0. \[\left[\begin{matrix}3 & 0 & 0 & 0 \\ 0 & 1 & 0 & 0 \\ 0 & 0 & 0 & 0 \\ 2 & 3 & 4 &0\end{matrix}\right]\] should be your matrix.

  7. annas
    • 2 years ago
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    thanks friend :) @KonradZuse

  8. KonradZuse
    • 2 years ago
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    Np, hope that works.... I normally have GlRotate() and other goodies to do the work for me :P.

  9. KonradZuse
    • 2 years ago
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    Most schools like to teach you how to do it 100%, but with IDEs and such you don't need half of the crap they teach you.

  10. annas
    • 2 years ago
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    we are using Visual studio for this ... well its the first programming course i hate lol :)

  11. KonradZuse
    • 2 years ago
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    Visual Studio for OpenGL? or OpenGL for C++????

  12. KonradZuse
    • 2 years ago
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    OpenGL is awesome, but hard. IT's also overkill for a lot of things, but just one of the only 3D Libraries out there....

  13. annas
    • 2 years ago
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    visual studio C++ with openGl libraries

  14. KonradZuse
    • 2 years ago
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    I code in Java and we have now JavaFX which has an Open GL wrapper.... I don't need all the lighting and shaders and poo poo :P.

  15. annas
    • 2 years ago
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    lol ... i might need your help with my project too ... actually my favorite site of coding is networking & web development stuff

  16. KonradZuse
    • 2 years ago
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    not a big fan of the web, html tags are meh.

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