/**
* 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);
}
}
