I have an object which I first want to rotate (about it’s own center) then translate it to some point. I have a glm::quat that holds the rotation and a glm::vec3 that holds the point to which it needs to be translated.
glm::vec3 position; glm::quat orientation; glm::mat4 modelmatrix; <-- want to combine them both in here modelmatrix = glm::translate(glm::toMat4(orientation),position);
Then at my render function I do…
pvm = projectionMatrix*viewMatrix*modelmatrix; glUniformMatrix4fv(pvmMatrixUniformLocation, 1, GL_FALSE, glm::value_ptr(pvm));
Unfortunately the object just orbits around the origin when I apply a rotation (the farther the “position” from the origin, the larger the orbit).
When I apply only the position it translates fine. When I apply only the rotation it stays at the origin and rotates about it’s center (as expected). So why does it go weird when I apply them both? Am I missing something basic?
thanks in advance,