bool SpatialNode::LookAt(const Vector3& target, const Vector3& up, TransformSpace space)
{
SpatialNode* parentNode = SpatialParent();
Vector3 worldSpaceTarget;
switch (space)
{
case TS_LOCAL:
worldSpaceTarget = WorldTransform() * target;
break;
case TS_PARENT:
worldSpaceTarget = !parentNode ? target : parentNode->WorldTransform() * target;
break;
case TS_WORLD:
worldSpaceTarget = target;
break;
}
Vector3 lookDir = worldSpaceTarget - WorldPosition();
// Check if target is very close, in that case can not reliably calculate lookat direction
if (lookDir.Equals(Vector3::ZERO))
return false;
Quaternion newRotation;
// Do nothing if setting look rotation failed
if (!newRotation.FromLookRotation(lookDir, up))
return false;
SetWorldRotation(newRotation);
return true;
}
void RigidBody::OnMarkedDirty(Node* node)
{
// If node transform changes, apply it back to the physics transform. However, do not do this when a SmoothedTransform
// is in use, because in that case the node transform will be constantly updated into smoothed, possibly non-physical
// states; rather follow the SmoothedTransform target transform directly
// Also, for kinematic objects Bullet asks the position from us, so we do not need to apply ourselves
if (!kinematic_ && (!physicsWorld_ || !physicsWorld_->IsApplyingTransforms()) && !smoothedTransform_)
{
// Physics operations are not safe from worker threads
Scene* scene = GetScene();
if (scene && scene->IsThreadedUpdate())
{
scene->DelayedMarkedDirty(this);
return;
}
// Check if transform has changed from the last one set in ApplyWorldTransform()
Vector3 newPosition = node_->GetWorldPosition();
Quaternion newRotation = node_->GetWorldRotation();
if (!newRotation.Equals(lastRotation_))
{
lastRotation_ = newRotation;
SetRotation(newRotation);
}
if (!newPosition.Equals(lastPosition_))
{
lastPosition_ = newPosition;
SetPosition(newPosition);
}
}
}
bool Node::LookAt(const Vector3& target, const Vector3& up)
{
Vector3 lookDir = target - GetWorldPosition();
// Check if target is very close, in that case can not reliably calculate lookat direction
if (lookDir.Equals(Vector3::ZERO))
return false;
Quaternion rotation;
// Do nothing if setting look rotation failed
if (!rotation.FromLookRotation(lookDir, up))
return false;
SetRotation((parent_ == scene_ || !parent_) ? rotation : parent_->GetWorldRotation().Inverse() * rotation);
return true;
}
void Character::FixedUpdate(float timeStep)
{
/// \todo Could cache the components for faster access instead of finding them each frame
RigidBody* body = GetComponent<RigidBody>();
AnimationController* animCtrl = GetComponent<AnimationController>();
// Update the in air timer. Reset if grounded
if (!onGround_)
inAirTimer_ += timeStep;
else
inAirTimer_ = 0.0f;
// When character has been in air less than 1/10 second, it's still interpreted as being on ground
bool softGrounded = inAirTimer_ < INAIR_THRESHOLD_TIME;
// Update movement & animation
const Quaternion& rot = node_->GetRotation();
Vector3 moveDir = Vector3::ZERO;
const Vector3& velocity = body->GetLinearVelocity();
// Velocity on the XZ plane
Vector3 planeVelocity(velocity.x_, 0.0f, velocity.z_);
if (controls_.IsDown(CTRL_FORWARD))
moveDir += Vector3::FORWARD;
if (controls_.IsDown(CTRL_BACK))
moveDir += Vector3::BACK;
if (controls_.IsDown(CTRL_LEFT))
moveDir += Vector3::LEFT;
if (controls_.IsDown(CTRL_RIGHT))
moveDir += Vector3::RIGHT;
// Normalize move vector so that diagonal strafing is not faster
if (moveDir.LengthSquared() > 0.0f)
moveDir.Normalize();
// If in air, allow control, but slower than when on ground
body->ApplyImpulse(rot * moveDir * (softGrounded ? MOVE_FORCE : INAIR_MOVE_FORCE));
if (softGrounded)
{
// When on ground, apply a braking force to limit maximum ground velocity
Vector3 brakeForce = -planeVelocity * BRAKE_FORCE;
body->ApplyImpulse(brakeForce);
// Jump. Must release jump control inbetween jumps
if (controls_.IsDown(CTRL_JUMP))
{
if (okToJump_)
{
body->ApplyImpulse(Vector3::UP * JUMP_FORCE);
okToJump_ = false;
}
}
else
okToJump_ = true;
}
// Play walk animation if moving on ground, otherwise fade it out
if (softGrounded && !moveDir.Equals(Vector3::ZERO))
animCtrl->PlayExclusive("Models/Jack_Walk.ani", 0, true, 0.2f);
else
animCtrl->Stop("Models/Jack_Walk.ani", 0.2f);
// Set walk animation speed proportional to velocity
animCtrl->SetSpeed("Models/Jack_Walk.ani", planeVelocity.Length() * 0.3f);
// Reset grounded flag for next frame
onGround_ = false;
}