//--------------------------
void ofxGrabCam::mouseDragged(ofMouseEventArgs &args) {
float dx = (args.x - mouseP.x) / ofGetViewportWidth();
float dy = (args.y - mouseP.y) / ofGetViewportHeight();
mouseP.x = args.x;
mouseP.y = args.y;
if (!mouseActions)
return;
if (!this->mouseDown)
return;
if (mouseP.z == 1.0f)
mouseP.z = 0.5f;
ofVec3f p = ofCamera::getPosition();
ofVec3f uy = ofCamera::getUpDir();
ofVec3f ux = ofCamera::getSideDir();
float ar = float(ofGetViewportWidth()) / float(ofGetViewportHeight());
if (handDown) {
//dolly
ofCamera::move(2 * (mouseW - p) * dy);
} else {
if (args.button==0 && !altDown) {
//orbit
ofVec3f arcEnd(dx, -dy, -trackballRadius);
arcEnd = arcEnd;
arcEnd.normalize();
ofQuaternion orientation = this->getGlobalOrientation();
rotation.makeRotate(orientation * ofVec3f(0.0f, 0.0f, -1.0f), orientation * arcEnd);
if (fixUpwards) {
ofQuaternion rotToUp;
ofVec3f sideDir = ofCamera::getSideDir() * rotation;
rotToUp.makeRotate(sideDir, sideDir * ofVec3f(1.0f, 0, 1.0f));
rotation *= rotToUp;
}
this->setOrientation(this->getGlobalOrientation() * rotation);
ofCamera::setPosition((p - mouseW) * rotation + mouseW);
} else {
//pan
float d = (p - mouseW).length();
//ofCamera::getFov() doesn't exist!!
ofCamera::move(dx * -ux * d * ar);
ofCamera::move(dy * uy * d);
}
}
}
ArcRange arcs () const { return make_iterator_range( arcBegin (), arcEnd () ); }
