C++ (Cpp) Vec2f::safeNormalize Examples

Example #1

File: p5drawingApp.cpp Project: nkingTBG/CinderProjects

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();
    }
}

Example #2

File: Food.cpp Project: Mohsenvand/nature-of-code-cinder

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;
}

Example #3

File: Repeller.cpp Project: MathieuGuillout/TheNatureOfCodeCinder

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;
}

Example #4

File: Spring.cpp Project: MathieuGuillout/TheNatureOfCodeCinder

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);
}

Example #5

File: Mover.cpp Project: Mohsenvand/nature-of-code-cinder

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;
}

Example #6

File: content.cpp Project: karenpeng/io_prototype

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;

}