public void setToInterpolateState(
EntityRef entity, CharacterStateEvent a, CharacterStateEvent b, long time) {
float t = (float) (time - a.getTime()) / (b.getTime() - a.getTime());
Vector3f newPos = BaseVector3f.lerp(a.getPosition(), b.getPosition(), t);
Quat4f newRot = BaseQuat4f.interpolate(a.getRotation(), b.getRotation(), t);
LocationComponent location = entity.getComponent(LocationComponent.class);
location.setWorldPosition(newPos);
location.setWorldRotation(newRot);
entity.saveComponent(location);
CharacterMovementComponent movementComponent =
entity.getComponent(CharacterMovementComponent.class);
movementComponent.mode = a.getMode();
movementComponent.setVelocity(a.getVelocity());
movementComponent.grounded = a.isGrounded();
if (b.getFootstepDelta() < a.getFootstepDelta()) {
movementComponent.footstepDelta =
t * (1 + b.getFootstepDelta() - a.getFootstepDelta()) + a.getFootstepDelta();
if (movementComponent.footstepDelta > 1) {
movementComponent.footstepDelta -= 1;
}
} else {
movementComponent.footstepDelta =
t * (b.getFootstepDelta() - a.getFootstepDelta()) + a.getFootstepDelta();
}
entity.saveComponent(movementComponent);
extrapolateCharacterComponent(entity, b);
setPhysicsLocation(entity, newPos);
}
/**
* Sets the state of the given entity to the state represented by the CharacterStateEvent. The
* state of the entity is determined by its LocationComponent (location and orientation of physics
* body), CharacterMovementComponent (velocity and various movement state variables) and
* CharacterComponent for pitch and yaw (used for the camera).
*
* @param entity
* @param state
*/
public void setToState(EntityRef entity, CharacterStateEvent state) {
LocationComponent location = entity.getComponent(LocationComponent.class);
CharacterMovementComponent movementComp = entity.getComponent(CharacterMovementComponent.class);
CharacterComponent characterComponent = entity.getComponent(CharacterComponent.class);
if (location == null || movementComp == null || characterComponent == null) {
return;
}
location.setWorldPosition(state.getPosition());
location.setWorldRotation(state.getRotation());
entity.saveComponent(location);
movementComp.mode = state.getMode();
movementComp.setVelocity(state.getVelocity());
movementComp.grounded = state.isGrounded();
movementComp.footstepDelta = state.getFootstepDelta();
entity.saveComponent(movementComp);
characterComponent.pitch = state.getPitch();
characterComponent.yaw = state.getYaw();
entity.saveComponent(characterComponent);
setPhysicsLocation(entity, state.getPosition());
}
private void walk(
final CharacterMovementComponent movementComp,
final CharacterStateEvent state,
CharacterMoveInputEvent input,
EntityRef entity) {
Vector3f desiredVelocity = new Vector3f(input.getMovementDirection());
float lengthSquared = desiredVelocity.lengthSquared();
// If the length of desired movement is > 1, normalise it to prevent movement being faster than
// allowed.
// (Desired velocity < 1 is allowed, as the character may wish to walk/crawl/otherwise move
// slowly)
if (lengthSquared > 1) {
desiredVelocity.normalize();
}
desiredVelocity.scale(movementComp.speedMultiplier);
float maxSpeed = getMaxSpeed(entity, movementComp);
if (input.isRunning()) {
maxSpeed *= movementComp.runFactor;
}
// As we can't use it, remove the y component of desired movement while maintaining speed.
if (movementComp.grounded && desiredVelocity.y != 0) {
float speed = desiredVelocity.length();
desiredVelocity.y = 0;
if (desiredVelocity.x != 0 || desiredVelocity.z != 0) {
desiredVelocity.normalize();
desiredVelocity.scale(speed);
}
}
desiredVelocity.scale(maxSpeed);
if (movementComp.mode == MovementMode.CLIMBING) {
climb(state, input, desiredVelocity);
}
// Modify velocity towards desired, up to the maximum rate determined by friction
Vector3f velocityDiff = new Vector3f(desiredVelocity);
velocityDiff.sub(state.getVelocity());
velocityDiff.scale(Math.min(movementComp.mode.scaleInertia * input.getDelta(), 1.0f));
Vector3f endVelocity = new Vector3f(state.getVelocity());
endVelocity.x += velocityDiff.x;
endVelocity.z += velocityDiff.z;
if (movementComp.mode.scaleGravity == 0) {
// apply the velocity without gravity
endVelocity.y += velocityDiff.y;
} else if (movementComp.mode.applyInertiaToVertical) {
endVelocity.y +=
Math.max(
-TERMINAL_VELOCITY,
velocityDiff.y - (GRAVITY * movementComp.mode.scaleGravity) * input.getDelta());
} else {
endVelocity.y =
Math.max(
-TERMINAL_VELOCITY,
state.getVelocity().y
- (GRAVITY * movementComp.mode.scaleGravity) * input.getDelta());
}
Vector3f moveDelta = new Vector3f(endVelocity);
moveDelta.scale(input.getDelta());
CharacterCollider collider =
movementComp.mode.useCollision ? physics.getCharacterCollider(entity) : null;
MoveResult moveResult =
move(
state.getPosition(),
moveDelta,
(state.getMode() != MovementMode.CLIMBING
&& state.isGrounded()
&& movementComp.mode.canBeGrounded)
? movementComp.stepHeight
: 0,
movementComp.slopeFactor,
collider);
Vector3f distanceMoved = new Vector3f(moveResult.getFinalPosition());
distanceMoved.sub(state.getPosition());
state.getPosition().set(moveResult.getFinalPosition());
if (input.isFirstRun() && distanceMoved.length() > 0) {
entity.send(new MovedEvent(distanceMoved, state.getPosition()));
}
if (moveResult.isBottomHit()) {
if (!state.isGrounded() && movementComp.mode.canBeGrounded) {
if (input.isFirstRun()) {
Vector3f landVelocity = new Vector3f(state.getVelocity());
landVelocity.y +=
(distanceMoved.y / moveDelta.y) * (endVelocity.y - state.getVelocity().y);
logger.debug("Landed at " + landVelocity);
entity.send(new VerticalCollisionEvent(state.getPosition(), landVelocity));
}
state.setGrounded(true);
}
endVelocity.y = 0;
// Jumping is only possible, if the entity is standing on ground
if (input.isJumpRequested()) {
state.setGrounded(false);
endVelocity.y += movementComp.jumpSpeed;
if (input.isFirstRun()) {
entity.send(new JumpEvent());
}
}
} else {
if (moveResult.isTopHit() && endVelocity.y > 0) {
endVelocity.y = -0.5f * endVelocity.y;
}
state.setGrounded(false);
}
state.getVelocity().set(endVelocity);
if (input.isFirstRun() && moveResult.isHorizontalHit()) {
entity.send(new HorizontalCollisionEvent(state.getPosition(), state.getVelocity()));
}
if (state.isGrounded()
|| movementComp.mode == MovementMode.SWIMMING
|| movementComp.mode == MovementMode.DIVING) {
state.setFootstepDelta(
state.getFootstepDelta()
+ distanceMoved.length() / movementComp.distanceBetweenFootsteps);
if (state.getFootstepDelta() > 1) {
state.setFootstepDelta(state.getFootstepDelta() - 1);
if (input.isFirstRun()) {
switch (movementComp.mode) {
case WALKING:
entity.send(new FootstepEvent());
break;
case DIVING:
case SWIMMING:
entity.send(new SwimStrokeEvent(worldProvider.getBlock(state.getPosition())));
break;
}
}
}
}
}