private float moveUp(float riseAmount, CharacterCollider collider, Vector3f position) {
Vector3f to =
new Vector3f(position.x, position.y + riseAmount + VERTICAL_PENETRATION_LEEWAY, position.z);
if (collider != null) {
SweepCallback callback = collider.sweep(position, to, VERTICAL_PENETRATION_LEEWAY, -1f);
if (callback.hasHit()) {
float actualDist =
Math.max(
0,
((riseAmount + VERTICAL_PENETRATION_LEEWAY) * callback.getClosestHitFraction())
- VERTICAL_PENETRATION_LEEWAY);
position.y += actualDist;
return actualDist;
}
}
position.y += riseAmount;
return riseAmount;
}
@ReceiveEvent(components = {HealthComponent.class})
public void onCrash(HorizontalCollisionEvent event, EntityRef entity) {
HealthComponent health = entity.getComponent(HealthComponent.class);
Vector3f vel = new Vector3f(event.getVelocity());
vel.y = 0;
float speed = vel.length();
if (speed > health.horizontalDamageSpeedThreshold) {
int damage =
(int)
((speed - health.horizontalDamageSpeedThreshold)
* health.excessSpeedDamageMultiplier);
if (damage > 0) {
checkDamage(
entity, damage, EngineDamageTypes.PHYSICAL.get(), EntityRef.NULL, EntityRef.NULL);
}
}
}
@ReceiveEvent
public void onCrash(
HorizontalCollisionEvent event,
EntityRef entity,
CharacterSoundComponent characterSounds,
HealthComponent healthComponent) {
Vector3f horizVelocity = new Vector3f(event.getVelocity());
horizVelocity.y = 0;
float velocity = horizVelocity.length();
if (velocity > healthComponent.horizontalDamageSpeedThreshold) {
if (characterSounds.lastSoundTime + CharacterSoundSystem.MIN_TIME < time.getGameTimeInMs()) {
StaticSound sound = random.nextItem(characterSounds.landingSounds);
if (sound != null) {
entity.send(new PlaySoundEvent(sound, characterSounds.landingVolume));
characterSounds.lastSoundTime = time.getGameTimeInMs();
entity.saveComponent(characterSounds);
}
}
}
}
@ReceiveEvent
public void onActivate(
ActivateEvent event, EntityRef entity, TunnelActionComponent tunnelActionComponent) {
Vector3f dir = new Vector3f(event.getDirection());
dir.scale(4.0f);
Vector3f origin = new Vector3f(event.getOrigin());
origin.add(dir);
Vector3i blockPos = new Vector3i();
int particleEffects = 0;
int blockCounter = tunnelActionComponent.maxDestroyedBlocks;
for (int s = 0; s <= tunnelActionComponent.maxTunnelDepth; s++) {
origin.add(dir);
if (!worldProvider.isBlockRelevant(origin)) {
break;
}
for (int i = 0; i < tunnelActionComponent.maxRaysCast; i++) {
Vector3f direction = random.nextVector3f();
Vector3f impulse = new Vector3f(direction);
impulse.scale(tunnelActionComponent.explosiveForce);
for (int j = 0; j < 3; j++) {
Vector3f target = new Vector3f(origin);
target.x += direction.x * j;
target.y += direction.y * j;
target.z += direction.z * j;
blockPos.set((int) target.x, (int) target.y, (int) target.z);
Block currentBlock = worldProvider.getBlock(blockPos);
if (currentBlock.isDestructible()) {
if (particleEffects < tunnelActionComponent.maxParticalEffects) {
EntityBuilder builder = entityManager.newBuilder("engine:smokeExplosion");
builder.getComponent(LocationComponent.class).setWorldPosition(target);
builder.build();
particleEffects++;
}
if (random.nextFloat() < tunnelActionComponent.thoroughness) {
EntityRef blockEntity = blockEntityRegistry.getEntityAt(blockPos);
blockEntity.send(
new DoDamageEvent(
tunnelActionComponent.damageAmount, tunnelActionComponent.damageType));
}
blockCounter--;
}
if (blockCounter <= 0) {
return;
}
}
}
}
// No blocks were destroyed, so cancel the event
if (blockCounter == tunnelActionComponent.maxDestroyedBlocks) {
event.consume();
}
}
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;
}
}
}
}
}
private boolean moveHorizontal(
Vector3f horizMove,
CharacterCollider collider,
Vector3f position,
float slopeFactor,
float stepHeight) {
float remainingFraction = 1.0f;
float dist = horizMove.length();
if (dist < physics.getEpsilon()) {
return false;
}
boolean horizontalHit = false;
Vector3f normalizedDir = Vector3fUtil.safeNormalize(horizMove, new Vector3f());
if (collider == null) {
// ignore collision
normalizedDir.scale(dist);
position.add(normalizedDir);
return false;
}
Vector3f targetPos = new Vector3f(normalizedDir);
targetPos.scale(dist + HORIZONTAL_PENETRATION_LEEWAY);
targetPos.add(position);
int iteration = 0;
Vector3f lastHitNormal = new Vector3f(0, 1, 0);
while (remainingFraction >= 0.01f && iteration++ < 10) {
SweepCallback callback =
collider.sweep(position, targetPos, HORIZONTAL_PENETRATION, slopeFactor);
/* Note: this isn't quite correct (after the first iteration the closestHitFraction is only for part of the moment)
but probably close enough */
float actualDist =
Math.max(
0,
(dist + HORIZONTAL_PENETRATION_LEEWAY) * callback.getClosestHitFraction()
- HORIZONTAL_PENETRATION_LEEWAY);
if (actualDist != 0) {
remainingFraction -= actualDist / dist;
}
if (callback.hasHit()) {
if (actualDist > physics.getEpsilon()) {
Vector3f actualMove = new Vector3f(normalizedDir);
actualMove.scale(actualDist);
position.add(actualMove);
}
dist -= actualDist;
Vector3f newDir = new Vector3f(normalizedDir);
newDir.scale(dist);
float slope = callback.getHitNormalWorld().dot(new Vector3f(0, 1, 0));
// We step up if we're hitting a big slope, or if we're grazing
// the ground, otherwise we move up a shallow slope.
if (slope < slopeFactor || 1 - slope < physics.getEpsilon()) {
boolean stepping =
checkStep(collider, position, newDir, callback, slopeFactor, stepHeight);
if (!stepping) {
horizontalHit = true;
Vector3f newHorizDir = new Vector3f(newDir.x, 0, newDir.z);
Vector3f horizNormal =
new Vector3f(callback.getHitNormalWorld().x, 0, callback.getHitNormalWorld().z);
if (horizNormal.lengthSquared() > physics.getEpsilon()) {
horizNormal.normalize();
if (lastHitNormal.dot(horizNormal) > physics.getEpsilon()) {
break;
}
lastHitNormal.set(horizNormal);
extractResidualMovement(horizNormal, newHorizDir);
}
newDir.set(newHorizDir);
}
} else {
// Hitting a shallow slope, move up it
Vector3f newHorizDir = new Vector3f(newDir.x, 0, newDir.z);
extractResidualMovement(callback.getHitNormalWorld(), newDir);
Vector3f modHorizDir = new Vector3f(newDir);
modHorizDir.y = 0;
newDir.scale(newHorizDir.length() / modHorizDir.length());
}
float sqrDist = newDir.lengthSquared();
if (sqrDist > physics.getEpsilon()) {
newDir.normalize();
if (newDir.dot(normalizedDir) <= 0.0f) {
break;
}
} else {
break;
}
dist = (float) Math.sqrt(sqrDist);
normalizedDir.set(newDir);
targetPos.set(normalizedDir);
targetPos.scale(dist + HORIZONTAL_PENETRATION_LEEWAY);
targetPos.add(position);
} else {
normalizedDir.scale(dist);
position.add(normalizedDir);
break;
}
}
return horizontalHit;
}
private boolean moveDown(
float dist, float slopeFactor, CharacterCollider collider, Vector3f position) {
if (collider == null) {
position.y += dist;
return false;
}
float remainingDist = -dist;
Vector3f targetPos = new Vector3f(position);
targetPos.y -= remainingDist + VERTICAL_PENETRATION_LEEWAY;
Vector3f normalizedDir = new Vector3f(0, -1, 0);
boolean hit = false;
int iteration = 0;
while (remainingDist > physics.getEpsilon() && iteration++ < 10) {
SweepCallback callback = collider.sweep(position, targetPos, VERTICAL_PENETRATION, -1.0f);
float actualDist =
Math.max(
0,
(remainingDist + VERTICAL_PENETRATION_LEEWAY) * callback.getClosestHitFraction()
- VERTICAL_PENETRATION_LEEWAY);
Vector3f expectedMove = new Vector3f(targetPos);
expectedMove.sub(position);
if (expectedMove.lengthSquared() > physics.getEpsilon()) {
expectedMove.normalize();
expectedMove.scale(actualDist);
position.add(expectedMove);
}
remainingDist -= actualDist;
if (remainingDist < physics.getEpsilon()) {
break;
}
if (callback.hasHit()) {
float originalSlope = callback.getHitNormalWorld().dot(new Vector3f(0, 1, 0));
if (originalSlope < slopeFactor) {
float slope = callback.calculateAverageSlope(originalSlope, CHECK_FORWARD_DIST);
if (slope < slopeFactor) {
remainingDist -= actualDist;
expectedMove.set(targetPos);
expectedMove.sub(position);
extractResidualMovement(callback.getHitNormalWorld(), expectedMove);
float sqrDist = expectedMove.lengthSquared();
if (sqrDist > physics.getEpsilon()) {
expectedMove.normalize();
if (expectedMove.dot(normalizedDir) <= 0.0f) {
hit = true;
break;
}
} else {
hit = true;
break;
}
if (expectedMove.y > -physics.getEpsilon()) {
hit = true;
break;
}
normalizedDir.set(expectedMove);
expectedMove.scale(-remainingDist / expectedMove.y + HORIZONTAL_PENETRATION_LEEWAY);
targetPos.set(position);
targetPos.add(expectedMove);
} else {
hit = true;
break;
}
} else {
hit = true;
break;
}
} else {
break;
}
}
if (iteration >= 10) {
hit = true;
}
return hit;
}
/**
* Checks whether a character should change movement mode (from being underwater or in a ladder).
* A higher and lower point of the character is tested for being in water, only if both points are
* in water does the character count as swimming. <br>
* <br>
* Sends the OnEnterLiquidEvent and OnLeaveLiquidEvent events.
*
* @param movementComp The movement component of the character.
* @param state The current state of the character.
*/
private void checkMode(
final CharacterMovementComponent movementComp,
final CharacterStateEvent state,
final CharacterStateEvent oldState,
EntityRef entity,
boolean firstRun) {
// If we are ghosting or we can't move, the mode cannot be changed.
if (!state.getMode().respondToEnvironment) {
return;
}
Vector3f worldPos = state.getPosition();
Vector3f top = new Vector3f(worldPos);
Vector3f bottom = new Vector3f(worldPos);
top.y += 0.5f * movementComp.height;
bottom.y -= 0.5f * movementComp.height;
final boolean topUnderwater = worldProvider.getBlock(top).isLiquid();
final boolean bottomUnderwater = worldProvider.getBlock(bottom).isLiquid();
final boolean newSwimming = !topUnderwater && bottomUnderwater;
final boolean newDiving = topUnderwater && bottomUnderwater;
boolean newClimbing = false;
// TODO: refactor this knot of if-else statements into something easy to read. Some sub-methods
// and switch statements would be nice.
if (!newSwimming && !newDiving) { // TODO: generalize to isClimbingAllowed() or similar
Vector3f[] sides = {
new Vector3f(worldPos),
new Vector3f(worldPos),
new Vector3f(worldPos),
new Vector3f(worldPos),
new Vector3f(worldPos)
};
float factor = 1.0f;
sides[0].x += factor * movementComp.radius;
sides[1].x -= factor * movementComp.radius;
sides[2].z += factor * movementComp.radius;
sides[3].z -= factor * movementComp.radius;
sides[4].y -= movementComp.height;
float distance = 100f;
for (Vector3f side : sides) {
Block block = worldProvider.getBlock(side);
if (block.isClimbable()) {
// If any of our sides are near a climbable block, check if we are near to the side
Vector3i myPos = new Vector3i(worldPos, 0.5f);
Vector3i climbBlockPos = new Vector3i(side, 0.5f);
Vector3i dir = new Vector3i(block.getDirection().getVector3i());
float currentDistance = 10f;
if (dir.x != 0
&& Math.abs(worldPos.x - (float) climbBlockPos.x + (float) dir.x * .5f)
< movementComp.radius + 0.1f) {
newClimbing = true;
if (myPos.x < climbBlockPos.x) {
dir.x = -dir.x;
}
currentDistance = Math.abs(climbBlockPos.z - worldPos.z);
} else if (dir.z != 0
&& Math.abs(worldPos.z - (float) climbBlockPos.z + (float) dir.z * .5f)
< movementComp.radius + 0.1f) {
newClimbing = true;
if (myPos.z < climbBlockPos.z) {
dir.z = -dir.z;
}
currentDistance = Math.abs(climbBlockPos.z - worldPos.z);
}
// if there are multiple climb blocks, choose the nearest one. This can happen when there
// are two
// adjacent ledges around a corner.
if (currentDistance < distance) {
distance = currentDistance;
state.setClimbDirection(dir);
}
}
}
}
if (newDiving) {
if (state.getMode() != MovementMode.DIVING) {
state.setMode(MovementMode.DIVING);
}
} else if (newSwimming) {
if (state.getMode() != MovementMode.SWIMMING) {
state.setMode(MovementMode.SWIMMING);
}
state.getVelocity().y += 0.02;
} else if (state.getMode() == MovementMode.SWIMMING) {
if (newClimbing) {
state.setMode(MovementMode.CLIMBING);
state.getVelocity().y = 0;
} else {
if (state.getVelocity().y > 0) {
state.getVelocity().y += 4;
}
state.setMode(MovementMode.WALKING);
}
} else if (newClimbing != (state.getMode() == MovementMode.CLIMBING)) {
// We need to toggle the climbing mode
state.getVelocity().y = 0;
state.setMode((newClimbing) ? MovementMode.CLIMBING : MovementMode.WALKING);
}
}