void p5drawingApp::update()
{
mouseDir = mousePos - mouseLast;
if( abs(mouseDir.x) + abs(mouseDir.y) > 2.0f ){
mouseDir.safeNormalize();
vectorValues.push_back(mouseDir);
for( list<Vec2f>::iterator listIterator = vectorValues.begin(); listIterator != vectorValues.end(); ++listIterator ) {
Vec2f vec = Vec2f(listIterator->x, listIterator->y);
mouseDir += vec;
}
mouseDir /= valAverageCount;
angleOrig = math<float>::atan2(mouseDir.x, mouseDir.y);
anglePlus = angleOrig + M_PI/2;
angleMinus = angleOrig - M_PI/2;
Vec2f mouseVelocity = mousePos - mouseLast;
perpLength = abs(mouseVelocity.x) + abs(mouseVelocity.y) + 5;
lengthValues.push_back(perpLength);
perpLength = 0.0f;
for( list<float>::iterator listIterator = lengthValues.begin(); listIterator != lengthValues.end(); ++listIterator ) {
float length = *listIterator;
perpLength += length;
}
perpLength /= valAverageCount;
mouseDirPlus = Vec2f( sin(anglePlus), cos(anglePlus) );
mouseDirPlus.safeNormalize();
mouseDirPlus *= perpLength;
mouseDirMinus = Vec2f( sin(angleMinus), cos(angleMinus) );
mouseDirMinus.safeNormalize();
mouseDirMinus *= perpLength;
mouseDir *= 35.0f;
vStart = Vec3f(mousePos.x - mouseDir.x, mousePos.y - mouseDir.y, 0.0f);
vEnd = Vec3f(mousePos.x, mousePos.y, 0.0f);
vEndPlus = Vec3f(mousePos.x + mouseDirPlus.x, mousePos.y + mouseDirPlus.y, 0.0f);
vEndMinus = Vec3f(mousePos.x + mouseDirMinus.x, mousePos.y + mouseDirMinus.y, 0.0f);
mouseLast = mousePos;
vectorValues.pop_front();
lengthValues.pop_front();
}
}
Vec2f Food::attract(SnakeRef snake) {
Vec2f force = mLocation - snake->getLocation();
float distance = force.length();
distance = math<float>::clamp(distance, 10.0f, 25.0f);
float strength = (mAmount * snake->getHunger()) / ( distance * distance ) / 10;
force.safeNormalize();
force *= strength;
return force;
}
Vec2f Repeller::repel(Particle * p) {
Vec2f dir = location - p->location;
float d = constrain((float)dir.length(), 5.0f, 100.0f);
dir.safeNormalize();
float G = 1200;
float force = -1.0f * G / ( d * d );
return dir * force;
}
void Spring::connect( Mover * mover )
{
Vec2f force = mover->position - anchor;
float d = force.length();
float stretch = d - len;
force.safeNormalize();
force *= -1 * k * stretch;
mover->applyForce(force);
}
Vec2f Mover::attract(MoverRef m) {
float G = 0.4;
Vec2f force = mLocation - m->mLocation;
float distance = force.length();
distance = math<float>::clamp(distance, 5.0, 25.0);
force.safeNormalize();
float strength = (G * mMass * m->mMass) / (distance * distance);
force *= strength;
return force;
}
Vec2f Content::seek(vector<Vec2f> aPoints){
float minDis= windowWidth * 2;
for(int i = aPoints.size()-1; i >= 0; i--){
float dis = aPoints[i].distance( Vec2f(mLocation.x, mLocation.y) );
if(dis < minDis) {
seekIndex = i;
minDis = dis;
}
}
Vec2f dir = aPoints[seekIndex] - Vec2f(mLocation.x, mLocation.y);
Vec2f steer = dir - Vec2f( mVelocity.x, mVelocity.y );
steer.safeNormalize();
//steer.x = constrain(steer.x, -1.2f, -0.4f);
steer *= maxSpeed;
steer.x = 0;
attracted = true;
return steer*0.1;
}