void CameraWidget::toBehind() {
// This is not very pretty, admittedly. The quaternion should be (0, 0.5*sqrt(2), 0.5*sqrt(2), 0)
// to be precise, but that seems to be some kind of edge case that breaks the modelview-matrix which
// can also not be reached by turning the trackball by mouse. So, we use a quaternion that is approximately
// the mathematically correct one; the difference is so small that one cannot see any.
quat q = normalize(quat(0.00306279f, 0.710406f, 0.708503f, 0.00167364f));
applyOrientation(q);
}
void CameraWidget::toRight() {
quat q = quat(-0.5f, 0.5f, 0.5f, -0.5f);
applyOrientation(q);
}
void CameraWidget::toFront() {
const float c = 0.5f * sqrtf(2.0f);
quat q = quat(c, 0.0f, 0.0f, c);
applyOrientation(q);
}
void CameraWidget::toBelow() {
quat q = quat(1.0f, 0.f, 0.f, 0.f);
applyOrientation(q);
}
void CameraWidget::toAbove() {
quat q = quat(0.0f, 0.0f, 0.0f, 1.0f);
applyOrientation(q);
}
