void Physics::detectCollisions (const std::vector<PhysicsObject*>& objects)
{
// Lets go through each collidable object checking if they collide.
for (auto i = 0U; i < objects.size(); ++i)
{
// Cache the values for the first object.
auto first = objects[i];
const auto& check = first->getCollider();
const auto checkLayer = m_layers[check.getLayer()];
auto checkBox = check.getBox();
checkBox.translate (first->getPosition().x, first->getPosition().y);
for (auto j = i + 1; j < objects.size(); ++j)
{
// Cache the values for the second object.
auto second = objects[j];
const auto& against = second->getCollider();
// Check if their layers collide.
if ((checkLayer | (1 << against.getLayer())) > 0)
{
// We must now check if the rectangles intersect.
auto againstBox = against.getBox();
againstBox.translate (second->getPosition().x, second->getPosition().y);
// Check if they intersect.
if (checkBox.intersects (againstBox))
{
// Determine the desired collision type.
if (check.isTrigger())
{
first->onTrigger (second);
if (against.isTrigger())
{
second->onTrigger (first);
}
}
// Collider on trigger.
else if (against.isTrigger())
{
second->onTrigger (first);
}
// Collider on collider.
else
{
first->onCollision (second);
second->onCollision (first);
}
}
}
}
}
}
void Player::moveForward(const float speed)
{
//Vector3 pos = getPosition();
const float speed_multiplier = 40;
float cosYaw = cosf(degreesToRadians(m_yaw));
float sinYaw = sinf(degreesToRadians(m_yaw));
//pos.x += float(cosYaw)*speed;
//pos.z += float(sinYaw)*speed;
btVector3 linearVelocity = getCollider()->getBody()->getLinearVelocity();
getCollider()->getBody()->setLinearVelocity(btVector3(btScalar(float(cosYaw)*speed*speed_multiplier), linearVelocity.getY(), btScalar(float(sinYaw)*speed*speed_multiplier)));
//setPosition(pos);
}
void Player::onCollision(GameObject* other)
{
sf::Vector2f off = { 0.f, 0.f };
PlatformObject* platform = dynamic_cast<PlatformObject*>(other);
if (platform)
{
if (m_position.y + dynamic_cast<BoxCollider*>(getCollider())->GetExtention().y
<= platform->getPosition().y)
{
onGround = true;
}
if (m_collMgr->getCount() > 0)
{
off = platform->getCollider()->getOffset();
off /= static_cast<float>(m_collMgr->getCount());
off.x = floorf(off.x);
off.y = floorf(off.y);
m_position += off;
}
else
{
m_position += dynamic_cast<PlatformObject*>(platform)->getCollider()->getOffset();
}
}
//m_velocity *= 0.9f;
//printf("Player::onCollision()\n")
}
bool GameObject::collides(GameObject * otherGameObject) {
Collider* c = getCollider();
assert( otherGameObject != NULL);
Collider* oc = otherGameObject->getCollider();
assert( c != NULL);
assert( oc != NULL);
return c->collides(oc);
}
void Enemy::tick(float delta) {
movement(delta);
if(canFire())
fire();
if(getCollider()->collides(SphereCollider(Game::getGame().getPlayer().getPosition(), 1))) {
// TODO: what side we were hit on
Connection::getInstance().write("EVN#1;0;");
destroy();
}
}
void PhysicsEntity::renderCollider(int x, int y) const
{
Colliders::RectangleCollider collider = getCollider();
SDL_Rect srcRect = {
collider.x + x,
collider.y + y,
collider.width,
collider.height
};
SDL_RenderDrawRect(renderer(), &srcRect);
}
void Flying::handleMovement(Vector2D velocity)
{
Vector2D newPos = m_position;
newPos.y(newPos.y() + velocity.y());
// Check collisions in y axis
if (newPos.y() + getCollider().y <= 0
|| newPos.y() + getCollider().y + getCollider().h >= TheGame::Instance().getMapHeight()
|| checkCollideTile(newPos)
|| checkCollideObject(newPos))
{
m_bYCollision = !m_bYCollision;
}
else
{
m_position.y(newPos.y());
}
// Update new position
newPos = m_position;
newPos.x(m_position.x() + velocity.x());
// Check collisions in x axis
if (newPos.x() + getCollider().x <= 0
|| newPos.x() + getCollider().x + getCollider().w >= TheGame::Instance().getMapWidth()
|| checkCollideTile(newPos)
|| checkCollideObject(newPos))
{
// There have been a collision, so change direction
m_bXCollision = !m_bXCollision;
}
else
{
// Move to new x position
m_position.x(newPos.x());
}
}
const SUCCESS StaticObject::checkCollision(PhysicalObject &object)
{
if(getCollider() == NULL || object.getCollider() == NULL)
{
return SUCCEEDED;
}
else
{
Radians angle;
if(getCollider()->canCollide(object.getCollider()->getType()))
if(getCollider()->collides(*object.getCollider(), &angle))
return collided(object, angle); // this ensures that object collider is called by this collided function, likewise a derived class needs to make sure its own derived collided function is called
else
return SUCCEEDED;
else if(object.getCollider()->canCollide(getCollider()->getType()))
if(object.getCollider()->collides(*getCollider(), &angle))
return collided(object, angle);
else
return SUCCEEDED;
else
return FAILED;
}
}
void Projectile::loadProjectile()
{
if(projectileAnimation == NULL)
{
for(int i = 0; i < PROJECTILE_FRAMES; i++)
{
char pathToFrame[256];
sprintf_s(pathToFrame, 256, PROJECTILE_FRAMES_PATH, i);
if((projectileFrames[i] = ImageManager::createImage(pathToFrame)) == NULL)
return;
}
projectileAnimation = AnimationManager::createAnimation(projectileFrames, PROJECTILE_FRAMES, DELAY_BETWEEM_FRAMES);
projectileAnimation->startPlaying();
projectileCollideSurface = getCollider(projectileFrames[0]);
}
}
const SUCCESS PhysicalObject::collided(PhysicalObject &object, const Radians angle)
{
Vector initVec(getVelocity()-object.getVelocity());
Mag_t<double> initVel(initVec.mag());
Radians initTheta(initVec.theta());
if(fabs(getX(initVel, initTheta-angle)) < REST_THRESHOLD)
{
setVelocity(getVelocity()+initVec/2.0);
object.setVelocity(object.getVelocity()-initVec/2.0);
antigravitate(object);
object.antigravitate(*this);
return SUCCEEDED;
}
// Frame of reference with the object at rest with this approaching it with an angle of 0
Point<double> p2(Vector(Mag_t<double>(2.0*getMass()*getX(initVel, initTheta-angle)/(getMass()+object.getMass())), initTheta-angle)); // Gets the velocity of 2 based on elastic collision equation
Point<double> p1((initVel*getMass()-p2.x()*object.getMass())/getMass(), -p2.y()*object.getMass()/getMass()); // Gets the velocity of 1 based off of elastic collision rulez
if(fabs(p1.x()) < REST_THRESHOLD && fabs(p2.x()) < REST_THRESHOLD)
{
p1.x(0.0);
p2.x(0.0);
}
Vector v1(p1);
Vector v2(p2);
v1.theta(-v1.theta()+initTheta);
v2.theta(angle);
v1 += object.getVelocity();
v2 += object.getVelocity();
Point<double> dif(object.getPosition()-*position);
while(getCollider()->collides(*object.getCollider()))
acceleration.set(*position-dif/pythagoras<double>(dif));
setVelocity(v1);
object.setVelocity(v2);
return SUCCEEDED;
}
const SUCCESS StaticObject::collided(PhysicalObject &object, const Radians angle)
{
Vector v(object.getVelocity());
v.theta() -= angle;
Point<double> appliedMomentum(v);
if(fabs(appliedMomentum.x()) < REST_THRESHOLD)
{
appliedMomentum.x(0);
}
appliedMomentum.x() *= -1;
v = appliedMomentum;
v.theta() += angle;
object.setVelocity(v);
Point<double> dif(getPosition()-object.getPosition());
while(getCollider()->collides(*object.getCollider()))
object.setPosition(object.getPosition()-dif/pythagoras<double>(dif));
return SUCCEEDED;
}
void
WorkerBee::onState(State state, sf::Time dt)
{
Vec2d empty(-1.0, -1.0);
// first state
if (state == IN_HIVE) {
// if bee has pollen transfer it to hive
if (getPollen() > 0) {
transferPollen(dt);
flower_location_ = empty;
setDebugStatus("in_hive_leaving_pollen");
} else {
// if bee has not enough energy to leave hive, eat its nectar
if (getEnergy() < energy_leave_hive_
&& getHive().getNectar() > 0) {
setDebugStatus("in_hive_eating");
eatFromHive(dt);
}
// if there is a flower in memory and enough energy, target move
// to this flower
else if (flower_location_ != empty
&& getEnergy() > energy_collect_pollen_) {
setDebugStatus("in_hive_leaving");
setMoveTarget(flower_location_);
// change state to to flower
nextState();
} else {
setDebugStatus("in_hive_no_flower");
}
}
}
// second state
else if (state == TO_FLOWER) {
setDebugStatus("to_flower");
if (getEnergy() < energy_collect_pollen_) {
nextState();
nextState();
}
Flower* flower = getAppEnv().getCollidingFlower(getVisionRange());
if (flower) {
setMoveTarget(flower->getPosition());
setMoveState(MoveState::TARGET);
if (isPointInside(flower->getPosition())) {
nextState();
}
} else if (isPointInside(flower_location_)) {
// go back to hive and clear location
nextState();
nextState();
setFlowerLocation(Vec2d(-1,-1));
}
}
// third state
else if (state == COLLECT_POLLEN) {
// if there is a flower at flower location and it has pollen and
// bee has not enough pollen, eat pollen from flower
Flower* flower(getAppEnv().getCollidingFlower(getCollider()));
if ((getPollen() < max_pollen_)
&& (flower != nullptr)
&& (flower->getPollen() > 0)) {
eatPollen(flower, dt);
} else {
// else skip collection
nextState();
}
} else if (state == RETURN_HIVE) {
// if bee is in hive change state to in hive
if (getHive().isColliderInside(getCollider())) {
nextState();
}
}
}
/**
*<summary>
* Check separation Axis test between passed GameObject(A) and calling GameObject(B)
* You may need to call it twice - for checking collision of B in A's coordinate system
*</Summary>
*/
bool GameObject::separationAxisTest(SharedPointer<GameObject> i_other, float& o_collisionTime, float & o_separationTime, myEngine::typedefs::Axis &o_collisionAxis) //Move to Collsion System to make it better - To-Do
{
bool isColliding = false;
float tCollisionInX = 0.0f;
float tSeparationInX = 0.0f;
float tCollisionInY = 0.0f;
float tSeparationInY = 0.0f;
float tCollisionInZ = 0.0f;
float tSeparationInZ = 0.0f;
//Position of other GameObject in this
Vector3D i_otherCenterPositionInThis = getTranslatedPosition(i_other->getPosition());
//Extent of other gameObject in this
Vector3D i_otherExtentInThis = getTransformedExtents(i_other);
//Transformed velocity of calling gamobject in its own coordiante system
Vector3D thisVelocityInThis = getTranslationMatrix() *physicsComponent->getCurrentVelocity();
//Velocity of other GameObject in calling gameObject coordinate system
Vector3D i_otherVelocityInThis = getTranslationMatrix() * i_other->physicsComponent->getCurrentVelocity();
//Relative velocity of other gamObject in freezed gameObject coordinate system i.e. in calling gameObject coordiante system
Vector3D i_otherChangedVelocityInThis = i_otherVelocityInThis - thisVelocityInThis;
//Expanding the extents of calling gameObject
float thisChangedXExtent = getCollider()->getExtendX() + i_otherExtentInThis.getX();
float thisChangedYExtent = getCollider()->getExtendY() + i_otherExtentInThis.getY();
float thisChangedZExtent = getCollider()->getExtendZ() + i_otherExtentInThis.getZ();
bool finalCollisionTimeInitialized = false;
//Swept collision for each axes
//Checking in X-Axis
switch (i_otherCenterPositionInThis.getX() >= 0 )
{
case true:
if (i_otherCenterPositionInThis.getX() <= thisChangedXExtent)
{
//To-Do - time of collision - Done but need testing
if (i_otherChangedVelocityInThis.getX() != 0)
{
tCollisionInX = abs(((0 + thisChangedXExtent) - i_otherCenterPositionInThis.getX()) / i_otherChangedVelocityInThis.getX());
tSeparationInX = abs((i_otherCenterPositionInThis.getX() - (0 - thisChangedXExtent)) / i_otherChangedVelocityInThis.getX());
o_collisionTime = tCollisionInX;
o_separationTime = tSeparationInX;
o_collisionAxis = myEngine::typedefs::XAxis;
finalCollisionTimeInitialized = true;
}
}
else return false;
break;
case false:
if (abs(i_otherCenterPositionInThis.getX()) <= thisChangedXExtent)
{
//To-Do - time of collision - Done but need testing
if (i_otherChangedVelocityInThis.getX() != 0)
{
tCollisionInX = abs((i_otherCenterPositionInThis.getX() - (0 - thisChangedXExtent)) / i_otherChangedVelocityInThis.getX());
tSeparationInX = abs(((0 + thisChangedXExtent) - i_otherCenterPositionInThis.getX()) / i_otherChangedVelocityInThis.getX());
o_collisionTime = tCollisionInX;
o_separationTime = tSeparationInX;
o_collisionAxis = myEngine::typedefs::XAxis;
finalCollisionTimeInitialized = true;
}
}
else return false;
break;
}
//Check in Y-axis in case X-Axis collision is true
switch (i_otherCenterPositionInThis.getY() >= 0)
{
case true:
if (i_otherCenterPositionInThis.getY() <= thisChangedYExtent)
{
//To-Do - time of collision -Done but need testing
if (i_otherChangedVelocityInThis.getY() != 0)
{
tCollisionInY = abs(((0 + thisChangedYExtent) - i_otherCenterPositionInThis.getY()) / i_otherChangedVelocityInThis.getY());
tSeparationInY = abs((i_otherCenterPositionInThis.getY() - (0 - thisChangedYExtent)) / i_otherChangedVelocityInThis.getY());
if (!finalCollisionTimeInitialized)
{
o_collisionTime = tCollisionInY;
o_separationTime = tSeparationInY;
o_collisionAxis = myEngine::typedefs::YAxis;
}
else
{
if (tCollisionInY < o_collisionTime)
{
o_collisionTime = tCollisionInY;
o_collisionAxis = myEngine::typedefs::YAxis;
}
if (tSeparationInY < o_separationTime)
o_separationTime = tSeparationInY;
}
}
}
else return false;
break;
case false:
if (abs(i_otherCenterPositionInThis.getY()) <= thisChangedYExtent)
{
//To-Do - time of collision - Done but need testing
if (i_otherChangedVelocityInThis.getY() != 0)
{
tCollisionInY = abs((i_otherCenterPositionInThis.getY() - (0 - thisChangedYExtent)) / i_otherChangedVelocityInThis.getY());
tSeparationInY = abs(((0 + thisChangedYExtent) - i_otherCenterPositionInThis.getY()) / i_otherChangedVelocityInThis.getY());
if (!finalCollisionTimeInitialized)
{
o_collisionTime = tCollisionInY;
o_separationTime = tSeparationInY;
o_collisionAxis = myEngine::typedefs::YAxis;
}
else
{
if (tCollisionInY < o_collisionTime)
{
o_collisionTime = tCollisionInY;
o_collisionAxis = myEngine::typedefs::YAxis;
}
if (tSeparationInY < o_separationTime)
o_separationTime = tSeparationInY;
}
}
}
else return false;
break;
}
//Check in Z-axis in case X-Axis and Y-Axis collision is true
switch (i_otherCenterPositionInThis.getZ() >= 0)
{
case true:
if (i_otherCenterPositionInThis.getZ() <= thisChangedZExtent)
{
//To-Do - time of collision - Done but need testing
if (i_otherChangedVelocityInThis.getZ() != 0)
{
tCollisionInZ = abs(((0 + thisChangedZExtent) - i_otherCenterPositionInThis.getZ()) / i_otherChangedVelocityInThis.getZ());
tSeparationInZ = abs((i_otherCenterPositionInThis.getZ() - (0 - thisChangedZExtent)) / i_otherChangedVelocityInThis.getZ());
if (!finalCollisionTimeInitialized)
{
o_collisionTime = tCollisionInZ;
o_separationTime = tSeparationInZ;
o_collisionAxis = myEngine::typedefs::ZAxis;
}
else
{
if (tCollisionInY < o_collisionTime)
{
o_collisionTime = tCollisionInZ;
o_collisionAxis = myEngine::typedefs::ZAxis;
}
if (tSeparationInY < o_separationTime)
o_separationTime = tSeparationInZ;
}
}
}
else return false;
break;
case false:
if (abs(i_otherCenterPositionInThis.getZ()) <= thisChangedZExtent)
{
//To-Do - time of collision - Done but need testing
if (i_otherChangedVelocityInThis.getZ() != 0)
{
tCollisionInZ = abs((i_otherCenterPositionInThis.getZ() - (0 - thisChangedZExtent)) / i_otherChangedVelocityInThis.getZ());
tSeparationInZ = abs(((0 + thisChangedZExtent) - i_otherCenterPositionInThis.getZ()) / i_otherChangedVelocityInThis.getZ());
if (!finalCollisionTimeInitialized)
{
o_collisionTime = tCollisionInZ;
o_separationTime = tSeparationInZ;
o_collisionAxis = myEngine::typedefs::ZAxis;
}
else
{
if (tCollisionInY < o_collisionTime)
{
o_collisionTime = tCollisionInZ;
o_collisionAxis = myEngine::typedefs::ZAxis;
}
if (tSeparationInY < o_separationTime)
o_separationTime = tSeparationInZ;
}
}
}
else return false;
break;
}
//returning if all if's are false i.e. collsion occured in this coordinate system
return true;
}
void Chaser::handleMovement(Vector2D velocity)
{
Vector2D newPos = m_position;
newPos.x(m_position.x() + velocity.x());
if (newPos.x() == m_playerPos->x())
{
m_velocity.x(0);
}
else
{
// check if the chaser is trying to go off the map
if (newPos.x() + getCollider().x < 0)
{
m_position.x(-getCollider().x);
}
else if (newPos.x() + getCollider().x + getCollider().w > TheGame::Instance().getMapWidth())
{
m_position.x(TheGame::Instance().getMapWidth() - getCollider().w - getCollider().x);
}
else
{
if (checkCollideTile(newPos) || checkCollideObject(newPos))
{
// collision, stop x movement
m_velocity.x(0);
if (checkCollideTile(newPos))
{
// Collision with the map, move to contact
if (m_position.x() < newPos.x()) // Collision with tile to the right
{
m_position.x(m_position.x() + (
abs(m_xSpeed) - (int(newPos.x() + getCollider().x + getCollider().w) % (*m_pCollisionLayers->begin())->getTileSize())));
}
else // Collision with tile to the left
{
m_position.x(m_position.x() -
(int(m_position.x() + getCollider().x) % (*m_pCollisionLayers->begin())->getTileSize()));
}
}
}
else
{
// no collision, add to the actual x position
m_position.x(newPos.x());
}
}
}
newPos.x(m_position.x());
newPos.y(m_position.y() + velocity.y());
// check if the chaser is going below map limits
if (newPos.y() + getCollider().y + getCollider().h > TheGame::Instance().getMapHeight())
{
m_position.y(TheGame::Instance().getMapHeight() - getCollider().h - getCollider().y);
m_velocity.y(0);
}
else
{
if (checkCollideTile(newPos) || checkCollideObject(newPos))
{
// Collision, stop y movement
m_velocity.y(0);
if (checkCollideTile(newPos))
{
// Collision with map, move to contact. Chaser doesn't jump so it's a lower tile
m_position.y(m_position.y() +
(m_ySpeed - (int(newPos.y() + getCollider().y + getCollider().h) % (*m_pCollisionLayers->begin())->getTileSize())));
}
}
else
{
// no collision, add to the actual y position
m_position.y(newPos.y());
}
}
}
void PhysicsEntity::move(PhysicsEntity::Direction dir)
{
Colliders::RectangleCollider collider = getCollider();
switch (dir)
{
case Direction_Top:
if (_collisionSubscriber->value()->isColliding(collider.margin((int) speed(), Colliders::Direction_Top)))
{
for (int allowedMargin = (int) speed();
allowedMargin >= 0;
allowedMargin--)
{
if (!_collisionSubscriber->value()->isColliding(
collider.margin(allowedMargin, Colliders::Direction_Top)))
{
setPosition(position() + Vector2(0, -allowedMargin));
break;
}
}
}
else
setPosition(position() + Vector2(0, -speed()));
break;
case Direction_Right:
if (_collisionSubscriber->value()->isColliding(collider.margin((int) speed(), Colliders::Direction_Right)))
{
for (int allowedMargin = (int) speed();
allowedMargin >= 0;
allowedMargin--)
{
if (!_collisionSubscriber->value()->isColliding(
collider.margin(allowedMargin, Colliders::Direction_Right)))
{
setPosition(position() + Vector2(allowedMargin, 0));
break;
}
}
}
else
setPosition(position() + Vector2(speed(), 0));
break;
case Direction_Left:
if (_collisionSubscriber->value()->isColliding(collider.margin((int) speed(), Colliders::Direction_Left)))
{
for (int allowedMargin = (int) speed();
allowedMargin >= 0;
allowedMargin--)
{
if (!_collisionSubscriber->value()->isColliding(
collider.margin(allowedMargin, Colliders::Direction_Left)))
{
setPosition(position() + Vector2(-allowedMargin, 0));
break;
}
}
}
else
setPosition(position() + Vector2(-speed(), 0));
break;
case Direction_Bottom:
if (_collisionSubscriber->value()->isColliding(collider.margin((int) speed(), Colliders::Direction_Bottom)))
{
for (int allowedMargin = (int) speed();
allowedMargin >= 0;
allowedMargin--)
{
if (!_collisionSubscriber->value()->isColliding(
collider.margin(allowedMargin, Colliders::Direction_Bottom)))
{
setPosition(position() + Vector2(0, allowedMargin));
break;
}
}
}
else
setPosition(position() + Vector2(0, speed()));
break;
}
}
