void textureTrailParticle::update(float forceMag, float timeFactor, ofPoint attractor, float angleRange){
vel *= drag;
// float xforce = ofSignedNoise((float)ofGetFrameNum() * timeFactor, 1000, unique * 100.0);
// float yforce = ofSignedNoise((float)ofGetFrameNum() * timeFactor, -1000, unique * 100.0);
// float zforce = 0;//ofSignedNoise((float)ofGetFrameNum() * timeFactor, 33, unique * 100.0);
//
// float speed = vel.length();
//We do it by angle so as not to have the fish want to do an instant change of direction.
// float speed = sqrt(vel.x*vel.x + vel.y*vel.y);
//TODO: clean this shit up - maybe apply force via change in angle with limit to amount of change.
ofVec3f vec = attractor - pos;
float tAngle = atan2f(vec.y, vec.x);
float angleShift = (DEG_TO_RAD * angleRange) * ofSignedNoise( ofGetElapsedTimef() * timeFactor , unique * 100.0 );
float angle = tAngle + angleShift;
ofVec3f force( cos(angle), sin(angle), 0.0);
force.normalize();
vel += force * forceMag;
pos += vel;
ofVec3f dist = pos - prevPoint;
if( dist.lengthSquared() >= 0.25 ){
updateTrail(prevPoint, pos+vel, 1, 20);
prevPoint = pos;
}
}
void ElRibbonTrail::nodeUpdated(const ElSceneNode* node)
{
updateTrail(node->getDerivedPosition());
}
