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| 06.15.2008 at 04:30AM PDT, ID: 23486057 |
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Calculate Position of an Object after Performing Tranlations (OpenGL)
Asked by Jamsb in OpenGL Graphics & Game Programming, Graphics & Game Programming, 3D Game Programming
Tags: C++, OPengl 3d Graphics Math
Basically I have written a Cube class. It has a member variable that determines the location it should be drawn in. I set the coordinates then call its Draw method. This Pushes the current matrix onto the stack, moves to correct position (glTranslatef) draws the cube, then pops the matrix back off the stack.
This all works fine, but elsewhere in my code I have done other translations (a rotate) and I could like to calculate what the co-ordinate of the cube would be after the translation.
So..:
1. Am i doing this the wrong way? Should I not be using glTranslatef and manuallycalculate the position of the cube using a custom matrix and redraw it?
2. Could I multiply the coordintes of the cube by somthing to get its new position? Is there a function for this.
I'm terribly confused! Hope i have explained things OK. Start Free Trial
This all works fine, but elsewhere in my code I have done other translations (a rotate) and I could like to calculate what the co-ordinate of the cube would be after the translation.
So..:
1. Am i doing this the wrong way? Should I not be using glTranslatef and manuallycalculate the position of the cube using a custom matrix and redraw it?
2. Could I multiply the coordintes of the cube by somthing to get its new position? Is there a function for this.
I'm terribly confused! Hope i have explained things OK. Start Free Trial
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20080716-EE-VQP-32 / EE_QW_2_20070628
