How to update opengl modelview matrix with my own 4x4 matrix?

Question

I have 4x4 matrix for object's transformations.

float mat44[16];

But i don't know how to update OpenGL ModelView matrix using my matrix. should i use glTranslatef()/glRotatef() with relavant values from my matrix or should i use glLoadMatrix(),glMultMatrix() ? Pls help. Thanks.

What OpenGL version do you use? – Sergey K. Apr 27 '12 at 18:57 — Sergey K., Apr 27 '12 at 18:57

score 20 · Accepted Answer · answered Feb 01 '12 at 07:00

If you want to apply your transformation to current transformation already in OpenGL matrix stack, then you should write:

glMultMatrixf(mat44);

But if you want to discard what's currently on top of OpenGL matrix stack and use your own transformation, then you should write:

glLoadMatrixf(mat44);

score 2 · Answer 2 · answered Feb 01 '12 at 12:19

2

For OpenGL-2.1 and earlier use glLoadMatrix or glMultMatrix, depending on the task at hand.

For OpenGL-3 and later set them as the right uniform for your shader using one of the glUniformMatrix variants.

answered Feb 01 '12 at 12:19

datenwolf

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How to update opengl modelview matrix with my own 4x4 matrix?

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