void Sphere::DrawRays(Ray ray, sf::RenderWindow *window) {
// sf::Vertex way[4];
StraightLine line = ray.Equation();
Vector2 p = Intersect(line, c2.center, c2.r, '-');
way[0] = sf::Vertex(sf::Vector2f(ray.getBegin().x, ray.getBegin().y), COLOR);
way[1] = sf::Vertex(sf::Vector2f(p.x, p.y), COLOR);
StraightLine normal = Normal(p, 2);
StraightLine refrline;
// drawNormal(p, normal, window);
double sin = sinAngle(normal, line);
double refr_sin = sin / n;
if (refr_sin > 1 || refr_sin < -1) { // external reflection
cout << "I AM HERE" << endl;
refrline = external_reflection(normal, sin, p, line.a);
double x = - refrline.b / refrline.a;
//double y = refrline.a * 500 + refrline.b;
way[2] = sf::Vertex(sf::Vector2f(x, 0));
}
else{
refrline = refr_line(normal, refr_sin, p, line.a);
cout << "REFRSIN" << refr_sin<< endl;
p = Intersect(refrline, c1.center, c1.r, '+');
way[2] = sf::Vertex(sf::Vector2f(p.x,p.y), COLOR);
normal = Normal(p, 1);
}
sin = sinAngle(normal, refrline);
refr_sin = n*sin;
//cout << refr_sin << endl;
if (refr_sin > 1 || refr_sin < -1) { // external reflection
cout << "REFRSIN" << refr_sin << endl;
refrline = external_reflection(normal, sin, p, refrline.a);
double x = (250 - refrline.b) / refrline.a;
//double y = refrline.a * 500 + refrline.b;
way[3] = sf::Vertex(sf::Vector2f(x,250), COLOR);
window->draw(way, 4, sf::LinesStrip);
}
else {
refrline = refr_line(normal, refr_sin, p, refrline.a);
//double x = (250 - refrline.b) / refrline.a;
//way[3] = sf::Vertex(sf::Vector2f(x, 250));
double y = refrline.a * 500 + refrline.b;
way[3] = sf::Vertex(sf::Vector2f(500, y), COLOR);
window->draw(way, 4, sf::LinesStrip);
}
}
inline
Matrix2d
Quaternion2d::rotationMatrix() const {
return Matrix2d(cosAngle(), sinAngle(), -sinAngle(), cosAngle());
}
inline
Quaternion2d
Quaternion2d::inverse() const {
return Quaternion2d(cosAngle(), -sinAngle());
}
inline
double
Quaternion2d::dot(const Quaternion2d& other) const {
return cosAngle() * other.cosAngle() + sinAngle() * other.sinAngle();
}
inline
double
Quaternion2d::angle() const {
return atan2(sinAngle(), cosAngle());
}
void Ball::ProcessCollisions(unordered_map<string, Game_Object*> objects)
{
// Calculate
Vector4 thisCenter(this->translationMatrix[0][3], this->translationMatrix[1][3], 0.0f, 0.0f);
// Check collision with all objects
for(unordered_map<string, Game_Object*>::iterator itr = objects.begin(); itr != objects.end(); itr++)
{
//
Vector4 otherCenter(itr->second->translationMatrix[0][3], itr->second->translationMatrix[1][3], 0.0f, 0.0f);
Vector4 combinedRadius = this->sprite->GetRadius() + itr->second->sprite->GetRadius();
// Check for collidable objects, based on dictionary name
if(itr->first == "WallLeft" && thisCenter.x - sprite->GetRadius().x < otherCenter.x + itr->second->sprite->GetRadius().x)
{
velocity->x += this->velocity->x * -2.0f;
}
if(itr->first == "WallRight" && thisCenter.x + sprite->GetRadius().x > otherCenter.x - itr->second->sprite->GetRadius().x)
{
velocity->x += this->velocity->x * -2.0f;
}
if(itr->first == "WallTop" && thisCenter.y + sprite->GetRadius().x > otherCenter.y - itr->second->sprite->GetRadius().y)
{
velocity->y += this->velocity->y * -2.0f;
}
if(itr->first == "WallBottom" && thisCenter.y - sprite->GetRadius().x < otherCenter.y + itr->second->sprite->GetRadius().y)
{
velocity->y += this->velocity->y * -2.0f;
}
// Detect spherical collision
if( ( itr->first.find("Ball") != string::npos || itr->first == "Bumper" /*|| itr->first == "Flipper1"*/) &&
itr->second != this &&
( (thisCenter.x - otherCenter.x) * (thisCenter.x - otherCenter.x) ) +
( (thisCenter.y - otherCenter.y) * (thisCenter.y - otherCenter.y) ) <
( combinedRadius.x * combinedRadius.x) )
{
// Get the vector in between the two objects
Vector4 hyp( (thisCenter.x - otherCenter.x), (thisCenter.y - otherCenter.y), 0.0f, 0.0f );
// Get the normal vector to the colliding object
Vector4 normal(hyp.normalize(hyp));
// Calculate a new velocity
*velocity = normal * (velocity->dot(normal) * -2.0f) + *velocity;
// Separate collided objects (upon collision 2 objects will slightly overlap so this is necessary)
Matrix4::UpdatePositionMatrix(translationMatrix, velocity->x, velocity->y, 0);
// NOTE: Ball-Ball collision sometimes only changes the velocity of one of the balls
}
// Angle of reflection (angle of flipper)
float bounceAngle = 0.0f;
if(itr->first == "Flipper1" && FlipperCollision(otherCenter, *(itr->second), bounceAngle))
{
Vector4 flipperRadius(itr->second->sprite->GetRadius().x, itr->second->sprite->GetRadius().y, 0.0f, 0.0f);
GLfloat cosAngle(itr->second->rotationMatrix[0][0]);
GLfloat sinAngle(-itr->second->rotationMatrix[0][1]);
// Calculate angle of impact
GLfloat hitAngle = atan(velocity->y/velocity->x) + PI;
if(velocity->x < 0)
hitAngle += 180 * PI / 180;
else if(velocity->x >= 0 && velocity->y < 0)
hitAngle += 360 * PI / 180;
if(hitAngle >= 2*PI - .0000002 && hitAngle <= 2*PI + .0000002)
hitAngle = 0.0f;
bounceAngle = PI - hitAngle - 2 * bounceAngle;
if(bounceAngle < 0)
bounceAngle += 2 * PI;
float length = velocity->length();
// How to get a vector based on this angle
Vector4 normal(length * cos(bounceAngle), length * sin(bounceAngle), 0.0f, 0.0f);
*velocity = normal;
// Separate collided objects (upon collision 2 objects will slightly overlap so this is necessary)
Matrix4::UpdatePositionMatrix(translationMatrix, velocity->x, velocity->y, 0);
// NOTE: Corner wonky, need to implement with rotation
}
}
}
