bool TRotationEffect::EditKeyFramesDialog(BLooper* target, TKeyFrameIterator
kf, bool doingDefaults)
{
// See if the dialog is already open. If so, bring it to front
if (m_keyFramesDialog) {
m_keyFramesDialog->Activate(true);
return false;
}
// Hang on to the stuff we keep around while the dialog is up
m_dialogTarget = target;
m_keyFrameTarget = kf;
m_editingDefaults = doingDefaults;
const TRotationState* rs = RotationState(kf);
m_keyFramesDialog = new TRotateDialog(this, rs->m_rotation);
// Center it
BScreen theScreen(B_MAIN_SCREEN_ID);
BRect screenBounds = theScreen.Frame();
BRect windBounds = m_keyFramesDialog->Frame();
m_keyFramesDialog->MoveTo((screenBounds.Width() - windBounds.Width())/2,
(screenBounds.Height() - windBounds.Height())/2);
// Show it
m_keyFramesDialog->Show();
return true;
// The dialog will now call DialogValueChanged(), DialogIsClosing()
}
void ParticleSystem::update()
{
// create a box that defines the screen (we'll use it to test if a particle
// is still on the screen ...
ofRectangle theScreen(-100,-100,ofGetWidth()+200,ofGetHeight()+200);
ofVec2f mouse(ofGetMouseX(),ofGetMouseY());
for(int i = 0; i < _particles.size(); ++i)
{
float distance = _particles[i]->position.distance(mouse);
float activeDistance = 40;
if(distance < activeDistance)
{
ofVec2f oppositeDirectionvelocity = (_particles[i]->position - mouse).normalized() * ofMap(distance, 0, activeDistance, .1,.3);
_particles[i]->velocity += oppositeDirectionvelocity;
}
}
// iterate through the particles backward so we can delete items as we go.
// this is best done with an std::vector<>::iterator, but we will do that
// later.
for(int i = _particles.size() - 1; i >= 0; --i)
{
_particles[i]->update();
if(_particles[i]->isDead || // is the particle too old?
!theScreen.inside(_particles[i]->position)) // or is the particle not on the screen?
{
_particles[i]->kill(); // call the kill function
// if yes to either, then erase the particle
_particles.erase(_particles.begin() + i);
}
}
// these are our render groups
// we have render groups so that we can treat particles as groups when drawing
for(int i = _groups.size() - 1; i >= 0; --i)
{
_groups[i]->update(); // update the group
if(_groups[i]->members.empty())
{
_groups.erase(_groups.begin() + i);
}
}
}
