void jump() {
if (!isOnGround) return;
Vector3f newVelocity = new Vector3f();
owner.getRigidBody().getLinearVelocity(newVelocity);
newVelocity.y = JUMP_SPEED;
owner.getRigidBody().setLinearVelocity(newVelocity);
}
protected Vector3f scaleForce(Vector3f delta) {
if (delta.lengthSquared() > DELTA_MAX) {
delta.normalize();
delta.scale(MAX_FORCE);
} else {
delta.scale(MAX_FORCE / DELTA_MAX);
}
return delta;
}
protected void doGroundMovement() {
if (!isOnGround) return;
// ground movement is as follows, the arrow key dictate the target velocity, and accelleration
// is
// added to achieve that. If opposing keys are held the target velocity is set to zero.
// This is the velocity in the normal plane in the player space
Vector3f targetVelocity = new Vector3f();
if (forward) targetVelocity.z += 1;
if (backward) targetVelocity.z -= 1;
if (left) targetVelocity.x -= 1;
if (right) targetVelocity.x += 1;
if (forward != backward || left != right) {
targetVelocity.normalize();
targetVelocity.scale(MAX_SPEED);
}
forward = false;
backward = false;
left = false;
right = false;
Vector3f forward = new Vector3f(0, 0, 1);
QuaternionUtil.quatRotate(owner.getOrientation(), forward, forward);
// right = normal x forward
// forward = right x normal
Vector3f right = new Vector3f();
right.cross(surfaceNormal, forward);
forward.cross(right, surfaceNormal);
right.normalize();
forward.normalize();
Matrix3f transform = new Matrix3f();
transform.setColumn(0, right);
transform.setColumn(1, surfaceNormal);
transform.setColumn(2, forward);
transform.transform(targetVelocity);
Vector3f delta = new Vector3f();
owner.getRigidBody().getLinearVelocity(delta);
delta.sub(targetVelocity, delta);
// feet can't pull and don't need to push for now
// Ds = D - N(N.D)
Vector3f parComp = new Vector3f(surfaceNormal);
parComp.scale(surfaceNormal.dot(delta));
delta.sub(delta, parComp);
owner.getRigidBody().applyCentralForce(scaleForce(delta));
}
