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Re: Can't get to see my triangle when I use FloatUtil.makeLookAt

Posted by Kraft on Nov 15, 2015; 8:41pm
URL: https://forum.jogamp.org/Can-t-get-to-see-my-triangle-when-I-use-FloatUtil-makeLookAt-tp4035777p4035785.html

Ok i got it ! I finally get to see my sweet triangle !

My mistake was in the multiplication order.

Instead of
        FloatUtil.multMatrix(model, scale);
        FloatUtil.multMatrix(model, rotation);
        FloatUtil.multMatrix(model, translation);
        ...
        FloatUtil.multMatrix(mvp, model);
        FloatUtil.multMatrix(mvp, view);
        FloatUtil.multMatrix(mvp, projection);
I should have done
        FloatUtil.multMatrix(scale, model, model);
        FloatUtil.multMatrix(rotation, model, model);
        FloatUtil.multMatrix(translation, model, model);
        ...
        FloatUtil.multMatrix(model, mvp, mvp);
        FloatUtil.multMatrix(view, mvp, mvp);
        FloatUtil.multMatrix(projection, mvp, mvp);

Someone here to confirm and maybe explain ?