arcball

I'm attempting to implement an arcball style camera. I use glm::lookAt to keep the camera pointed at a target, and then move it around the surface of a sphere using azimuth/inclination angles to rotate the view. I'm running into an issue where the view gets flipped upside down when the azimuth approaches 90 degrees. Here's the relevant code: Get projection and view martrices. Runs in the main loop void Visual::updateModelViewProjection() { model = glm::mat4(); projection = glm::mat4(); view = glm::mat4(); projection = glm::perspective ( (float)glm::radians(camera.Zoom), (float)width / height,

I have successfully implemented Arcball rotation through quaternions, but am confused at what to do when the direction vector of the camera is parallel to up vector. Currently I am just restricting the rotation along the x-axis (the pitch) when the dot product of the direction vector and the up vector exceeds 0.99. In Maya (or Max, XSI where arcball rotation is used) for example, you can rotate around in a full circle very smoothly. I am hoping for a solution similar to that of Maya's rotation. Thankyou You need to adjust both the view normal vector (VNV) and the view up vector (VUV) and

I'm looking for a simple implementation for arcball rotation on 3D models with quaternions, specifically using GLKit on iOS . So far, I have examined the following sources: Arcball rotation with GLKit How to rotate a 3D object with touches using OpenGL I've also been trying to understand source code and maths from here and here . I can rotate my object but it keeps jumping around at certain angles, so I fear gimbal lock is at play. I'm using gesture recognizers to control the rotations (pan gestures affect roll and yaw, rotate gestures affect pitch). I'm attaching my code for the quaternion