jacksmash

05-05-2010, 06:34 AM

I'm calling the glRotate... function to rotate a triangle, who's vertices are:

v1 = {-1, -1, -2}

v2 = {-0.8, -1, -2}

v3 = {-1, -0.8, -2}

So, calling glRotate rotates the triangle by 2 degrees. Looks fine on the display.

Now, let's say I want to compute the updated coordinates of that triangle. Would I not apply an x-axis rotation matrix to the original vertices, where the angle theta is 2 degrees?

So, the updated vertices would be approximately:

v1 = {-1, -0.9, -2.03}

v2 = {-0.8, -0.9, -2.03}

v3 = {-1, -0.73, -2.03}

Does that make sense? I just want to be sure I'm not missing anything.

Cheers.

v1 = {-1, -1, -2}

v2 = {-0.8, -1, -2}

v3 = {-1, -0.8, -2}

So, calling glRotate rotates the triangle by 2 degrees. Looks fine on the display.

Now, let's say I want to compute the updated coordinates of that triangle. Would I not apply an x-axis rotation matrix to the original vertices, where the angle theta is 2 degrees?

So, the updated vertices would be approximately:

v1 = {-1, -0.9, -2.03}

v2 = {-0.8, -0.9, -2.03}

v3 = {-1, -0.73, -2.03}

Does that make sense? I just want to be sure I'm not missing anything.

Cheers.