bool Math_Intersect(const Circle& c, const LineSegment& l)
{
Vector2 startToCenter = c.center - l.from;
Vector2 startToEnd = l.to - l.from;
float len = startToEnd.Length();
Vector2 dir = startToEnd / len;
// Find the closest point to the line segment
float projection = Math_Dot(startToCenter, dir);
Vector2 closestPoint;
if (projection > len)
{
closestPoint = l.to;
}
else if (projection < 0.0f)
{
closestPoint = l.from;
}
else
{
closestPoint = l.from + (dir * projection);
}
// Check if the closest point is within the circle
Vector2 closestToCenter = c.center - closestPoint;
if (closestToCenter.LengthSquared() > c.radius * c.radius)
{
return false;
}
return true;
}
Vector2 Controller::MakeLookDisc(const Mathematics::Vector2 p_ScreenCentre) const
{
Vector2 ret = m_States.MouseAndKeyboard().Position - p_ScreenCentre;
ret = (ret.LengthSquared() > deadDist * deadDist) ? ret : Zero2();
//ret += m_States.Gamepad().RightStick;
return ret.IsAtOrigin() ? Zero2() : ret.Direction();
}
bool Physics_BoundingCircleTest(const Circle& srcCircle, const Circle& intersectCircle)
{
Vector2 vecToTarget = intersectCircle.center - srcCircle.center;
float distanceSqr = vecToTarget.LengthSquared();
float radii = intersectCircle.radius + srcCircle.radius;
float radiiSqr = radii * radii;
bool intersect = (distanceSqr < radiiSqr);
return intersect;
}
bool Circle::Intersects(const Rect& rectangle) const
{
Vector2 v(MathHelper::Clamp(_center.X, rectangle.X, rectangle.X + rectangle.Width), MathHelper::Clamp(_center.Y, rectangle.Y, rectangle.Y + rectangle.Height));
Vector2 direction = _center - v;
float distanceSquared = direction.LengthSquared();
return ((distanceSquared > 0) && (distanceSquared < _radius * _radius));
}
void Fluid::AddForces(const Vector2& position, const Vector2& direction,
float sigma, float amplitude,
View2f* velocities) const {
if (direction.LengthSquared() < 1e-4f) {
return AddForces(position, sigma, amplitude, velocities);
}
const int x = std::lroundf(position.x * Width());
const int y = std::lroundf((1.0f - position.y) * Height());
const int radius = std::lround(3.3f * sigma);
const Vector2 dn = direction.Normalized();
const float sigmaSq = sigma * sigma;
for (int j = y - radius; j <= y + radius; ++j) {
for (int i = x - radius; i <= x + radius; ++i) {
const int s = i - x;
const int t = y - j; // Flips at y-axis.
const float e = amplitude * std::exp(-(0.5f / sigmaSq) * (s * s + t * t));
AddValue(i, j, e * dn, velocities);
}
}
}
// static
float Vector2::LengthSquared(const Vector2& p_Vector)
{
return p_Vector.LengthSquared();
}
void MobileSimulator::MouseMotionEvent(Vec2i screenCoordinates)
{
Vector2 pos = MathUtil::ScreenToWorld(screenCoordinates);
_fingerGhost1->SetPosition(pos);
_fingerGhost2->SetPosition(-pos);
if (_mouseDown)
{
//move touch(es)
TouchList *tl = &TouchListener::GetTouchList();
if (tl->size() > 0)
{
(*tl)[0]->CurrentPoint = screenCoordinates;
if ( (*tl)[0]->MotionStartTime < 0.0f )
{
(*tl)[0]->MotionStartTime = theWorld.GetCurrentTimeSeconds();
}
}
if (tl->size() > 1)
{
Vector2 negCoordsVec = MathUtil::WorldToScreen(-pos);
Vec2i negCoords(negCoordsVec.X, negCoordsVec.Y);
(*tl)[1]->CurrentPoint = negCoords;
if ( (*tl)[1]->MotionStartTime < 0.0f )
{
(*tl)[1]->MotionStartTime = theWorld.GetCurrentTimeSeconds();
}
Touch* t1 = (*tl)[0];
Touch* t2 = (*tl)[1];
Vector2 start1(t1->StartingPoint);
Vector2 current1(t1->CurrentPoint);
Vector2 start2(t2->StartingPoint);
Vector2 current2(t2->CurrentPoint);
Vector2 initialVector = start2 - start1;
Vector2 currentVector = current2 - current1;
Vector2 initNorm = Vector2::Normalize(initialVector);
Vector2 currentNorm = Vector2::Normalize(currentVector);
float radiansRotated = acos(Vector2::Dot(initNorm, currentNorm));
if (!_multiGestureOngoing)
{
Vector2 motion = current1 - start1;
if (motion.LengthSquared() >= (MULTI_MIN_DISTANCE * MULTI_MIN_DISTANCE) )
{
_multiGestureOngoing = true;
// figure out if it's a rotate or a pinch
if (radiansRotated > MULTI_ROTATE_ANGLE)
{
_gestureType = ROTATE;
}
else
{
_gestureType = PINCH;
}
}
}
if (_multiGestureOngoing)
{
GestureData gd;
gd.Velocity = 0.0f; // don't want to store all the extra datums
// needed to actually calculate this
if (_gestureType == ROTATE)
{
float cross = Vector2::Cross(initNorm, currentNorm);
if (cross > 0.0f)
{
radiansRotated = -radiansRotated;
}
gd.GestureMagnitude = radiansRotated;
theSwitchboard.Broadcast(new TypedMessage<GestureData>("MultiTouchRotate", gd));
}
else if (_gestureType == PINCH)
{
gd.GestureMagnitude = currentVector.Length() / initialVector.Length();
theSwitchboard.Broadcast(new TypedMessage<GestureData>("MultiTouchPinch", gd));
}
}
}
}
}
void MobileSimulator::MouseUpEvent(Vec2i screenCoordinates, MouseButtonInput button)
{
_multiGestureOngoing = false;
_gestureType = NONE;
_mouseDown = false;
TouchList* tl = &TouchListener::GetTouchList();
if (theInput.IsKeyDown(ANGEL_KEY_LEFTCONTROL) || theInput.IsKeyDown(ANGEL_KEY_RIGHTCONTROL))
{
TouchList::iterator it = tl->begin();
while (it != tl->end())
{
SendTouchNotifiers((*it), TOUCH_END);
delete (*it);
it = tl->erase(it);
}
}
else
{
// just a single touch, but we'll iterate anyway
TouchList::iterator it = tl->begin();
while (it != tl->end())
{
if ( (theWorld.GetCurrentTimeSeconds() - (*it)->MotionStartTime) < SWIPE_MAX_DURATION)
{
Vector2 start((*it)->StartingPoint.X, (*it)->StartingPoint.Y);
Vector2 end((*it)->CurrentPoint.X, (*it)->CurrentPoint.Y);
Vector2 motion = end - start;
if (motion.LengthSquared() >= (SWIPE_MIN_DISTANCE * SWIPE_MIN_DISTANCE))
{
float angle = MathUtil::ToDegrees(acos(Vector2::Dot(Vector2::UnitX, Vector2::Normalize(motion))));
if (motion.Y > 0.0f)
{
angle = 360.0f - angle;
}
if ( (angle > 45.0f) && (angle <= 135.0f) )
{
// swipe up
theSwitchboard.Broadcast(new Message("MultiTouchSwipeUp"));
}
else if ( (angle > 135.0f) && (angle <= 225.0f) )
{
// swipe left
theSwitchboard.Broadcast(new Message("MultiTouchSwipeLeft"));
}
else if ( (angle > 225.0f) && (angle <= 315.0f) )
{
// swipe down
theSwitchboard.Broadcast(new Message("MultiTouchSwipeDown"));
}
else
{
// swipe right
theSwitchboard.Broadcast(new Message("MultiTouchSwipeRight"));
}
}
}
SendTouchNotifiers((*it), TOUCH_END);
delete (*it);
it = tl->erase(it);
}
}
}
void CameraManager::Update(float a_dt)
{
m_currentCamera = &m_gameCamera;
// Process camera controls
InputManager & inMan = InputManager::Get();
if (DebugMenu::Get().IsDebugMenuEnabled())
{
m_currentCamera = &m_debugCamera;
// Create a view direction matrix
Matrix cameraMat = m_currentCamera->GetCameraMatrix();
Vector camPos = m_currentCamera->GetPosition();
Vector camTarget = m_currentCamera->GetTarget();
const float speed = m_currentCamera->GetTranslationSpeed();
const float rotSpeed = m_currentCamera->GetRotationSpeed();
// Don't change camera while there is a dialog up
if (!DebugMenu::Get().IsDebugMenuActive())
{
// WSAD for FPS style movement
Vector moveOffset(0.0f);
if (inMan.IsKeyDepressed(SDLK_w)) { moveOffset -= cameraMat.GetUp() * a_dt * speed; }
if (inMan.IsKeyDepressed(SDLK_s)) { moveOffset += cameraMat.GetUp() * a_dt * speed; }
if (inMan.IsKeyDepressed(SDLK_d)) { moveOffset += cameraMat.GetRight() * a_dt * speed; }
if (inMan.IsKeyDepressed(SDLK_a)) { moveOffset -= cameraMat.GetRight() * a_dt * speed; }
if (inMan.IsKeyDepressed(SDLK_q)) { moveOffset += Vector(0.0f, 0.0f, speed * a_dt); }
if (inMan.IsKeyDepressed(SDLK_e)) { moveOffset -= Vector(0.0f, 0.0f, speed * a_dt); }
// Move both the camera and the target together
m_currentCamera->SetPosition(camPos + moveOffset);
m_currentCamera->SetTarget(camTarget + moveOffset);
// Set rotation based on mouse delta while hotkey pressed
if (inMan.IsKeyDepressed(SDLK_LSHIFT))
{
// Get current camera inputs
const float maxRot = 360.0f;
Vector2 curInput = inMan.GetMousePosRelative();
Vector2 lastInput = m_debugOrientationInput;
// Cancel out mouse movement above an epsilon to prevent the camera jumping around
const float cameraMoveEpsilonSq = 0.05f;
Vector2 vecInput = curInput - lastInput;
if (vecInput.LengthSquared() > cameraMoveEpsilonSq)
{
vecInput = Vector2::Vector2Zero();
}
m_debugMouseLookAngleEuler += Vector(vecInput.GetY() * a_dt * rotSpeed, 0.0f, -vecInput.GetX() * a_dt * rotSpeed);
Quaternion rotation(m_debugMouseLookAngleEuler);
Matrix rotMat = Matrix::Identity();
rotation.ApplyToMatrix(rotMat);
Vector newTarget = rotMat.Transform(Vector(0.0f, Camera::sc_defaultCameraTargetDistance, 0.0f));
m_currentCamera->SetTarget(camPos + newTarget);
m_debugOrientationInput = curInput;
}
// Draw camera position on top of everything
if (DebugMenu::Get().IsDebugMenuEnabled())
{
const Vector & camPos = m_currentCamera->GetPosition();
char buf[32];
sprintf(buf, "%.2f, %.2f, %.2f", camPos.GetX(), camPos.GetY(), camPos.GetZ());
FontManager::Get().DrawDebugString2D(buf, Vector2(0.8f, 0.95f));
}
}
}
m_currentCamera->Update();
}
void LongPressGestureDetector::SendEvent(const Integration::TouchEvent& event)
{
unsigned int pointCount( event.GetPointCount() );
switch (mState)
{
// Clear: Wait till one point touches the screen before starting timer.
case Clear:
{
const TouchPoint& point = event.points[0];
if ( point.state == TouchPoint::Down )
{
mTouchPositions.clear();
mTouchPositions[point.deviceId] = point.screen;
mTouchTime = event.time;
mTimer.SetInterval(GetSystemValue());
mTimer.Start();
// A long press gesture may be possible, tell Core about this and change state to Touched.
mState = Touched;
EmitGesture( Gesture::Possible );
}
break;
}
// Touched: Monitor movement and addition/removal of points.
case Touched:
{
if (pointCount > mMaximumTouchesRequired)
{
// A long press did not occur, tell Core that it was cancelled and change state to Failed.
EmitGesture( Gesture::Cancelled );
mTouchPositions.clear();
mTimer.Stop();
mState = Failed;
break;
}
bool endLoop(false);
for (std::vector<TouchPoint>::const_iterator iter = event.points.begin(), endIter = event.points.end();
iter != endIter && !endLoop; ++iter)
{
switch( iter->state )
{
// add point.
case TouchPoint::Down:
{
mTouchPositions[iter->deviceId] = iter->screen;
break;
}
// remove point.
case TouchPoint::Up:
case TouchPoint::Interrupted:
{
// System has interrupted us, long press is not possible, inform Core
EmitGesture( Gesture::Cancelled );
mTouchPositions.clear();
mTimer.Stop();
mState = ( pointCount == 1 ) ? Clear : Failed; // Change state to Clear if only one point, Failed otherwise.
endLoop = true;
break;
}
case TouchPoint::Motion:
{
const Vector2 touchPosition( mTouchPositions[iter->deviceId] - iter->screen );
float distanceSquared = touchPosition.LengthSquared();
if (distanceSquared > ( MAXIMUM_MOTION_ALLOWED * MAXIMUM_MOTION_ALLOWED ) )
{
// We have moved more than the allowable motion for a long press gesture. Inform Core and change state to Failed.
EmitGesture( Gesture::Cancelled );
mTimer.Stop();
mState = Failed;
endLoop = true;
}
break;
}
case TouchPoint::Stationary:
case TouchPoint::Leave:
case TouchPoint::Last:
{
break;
}
}
}
break;
}
// Failed/Finished: Monitor the touches, waiting for all touches to be released.
case Failed:
case Finished:
{
// eventually the final touch point will be removed, marking the end of this gesture.
if ( pointCount == 1 )
{
TouchPoint::State primaryPointState = event.points[0].state;
if ( (primaryPointState == TouchPoint::Up) || (primaryPointState == TouchPoint::Interrupted) )
{
if(mState == Finished)
{
// When the last touch point is lifted, we should inform the Core that the Long press has finished.
EmitGesture(Gesture::Finished);
}
mTouchPositions.clear();
mState = Clear; // Reset state to clear when last touch point is lifted.
}
}
break;
}
}
}
void InputState::Update()
{
Reset();
m_System->Update();
//buttons
if (m_System->IsKeyDown(Keys::SPACE) || m_System->IsGamePadButtonDown(Xbox::A))
{
m_ActionPressed = true;
}
if (m_System->IsKeyDown(Keys::ENTER) || m_System->IsGamePadButtonDown(Xbox::X))
{
m_ConfirmPressed = true;
}
if (m_System->IsKeyDown(Keys::ESCAPE) || m_System->IsGamePadButtonDown(Xbox::Y))
{
m_DenyPressed = true;
}
if(m_System->IsKeyDown(Keys::F1))
{
m_FullscreenPressed = true;
}
//axes or discs
Vector2 leftRaw;
Vector2 rightRaw;
if (m_System->GamepadIsConnected())
{
leftRaw(1) = -m_System->GetLeftAnalogX();
leftRaw(2) = m_System->GetLeftAnalogY();
rightRaw(1) = m_System->GetRightAnalogX();
rightRaw(2) = m_System->GetRightAnalogY();
m_LeftDisc = leftRaw - m_LeftDiscCentre;
m_RightDisc = rightRaw - m_LeftDiscCentre;
}
else
{
if (m_System->IsKeyDown(Keys::A))
{
leftRaw += U();
}
if (m_System->IsKeyDown(Keys::D))
{
leftRaw += -U();
}
if (m_System->IsKeyDown(Keys::W))
{
leftRaw += V();
}
if (m_System->IsKeyDown(Keys::S))
{
leftRaw += -V();
}
if (m_System->IsKeyDown(Keys::LEFT))
{
rightRaw += -U();
}
if (m_System->IsKeyDown(Keys::RIGHT))
{
rightRaw += U();
}
if (m_System->IsKeyDown(Keys::UP))
{
rightRaw += V();
}
if (m_System->IsKeyDown(Keys::DOWN))
{
rightRaw += -V();
}
if (!EquivalentToZero(leftRaw.LengthSquared()))
{
m_LeftDisc = leftRaw.Direction();
}
if (!EquivalentToZero(rightRaw.LengthSquared()))
{
m_RightDisc = rightRaw.Direction();
}
}
}
float Math_LengthSquared(const Vector2& v)
{
return v.LengthSquared();
}
