public void setTarget(int x, int y, int z) {
checkOrigin();
// We target the middle of the block, at the very top.
final Vec3 target = Vec3.createVectorHelper(x + 0.5, y + 1, z + 0.5);
// Horizontal distance between the origin and target
final double distHorizontal =
KNOB_LOB_HORIZONTAL_MUL
* Math.sqrt(
Math.pow(target.xCoord - projectileOrigin.xCoord, 2)
+ Math.pow(target.zCoord - projectileOrigin.zCoord, 2));
// No vertical multiplier is applied for decline slopes.
final double distVertical =
Math.max((target.yCoord - projectileOrigin.yCoord) * KNOB_LOB_VERTICAL_MUL, 0);
// Calculate the arc of the trajectory
final float lobScale =
(float)
Math.min(
KNOB_LOB_MAXIMUM_VALUE,
Math.max(KNOB_LOB_MINIMUM_VALUE, KNOB_LOB_BONUS + distHorizontal + distVertical));
// Calculate the velocity of the projectile
final Vec3 velocity =
TileEntityCannonLogic.calculateTrajectory(projectileOrigin, target, lobScale);
// m/s applied to item.
final double speed = velocity.lengthVector();
targetSpeed.set(speed);
// reverse the vector to angles for cannon model
final Vec3 direction = velocity.normalize();
final double pitch = Math.asin(direction.yCoord);
final double yaw = Math.atan2(direction.zCoord, direction.xCoord);
// Set yaw and pitch
targetYaw.set(Math.toDegrees(yaw) + YAW_OFFSET_DEGREES);
targetPitch.set(Math.toDegrees(pitch));
currentYaw = targetYaw.get();
currentPitch = targetPitch.get();
// Sync targets
sync();
}
@Override
public void updateEntity() {
checkOrigin();
if (Double.isNaN(currentPitch)) {
Log.warn("Pitch was NaN");
currentPitch = 45;
targetPitch.set(currentPitch);
}
if (Double.isNaN(currentYaw)) {
Log.warn("Yaw was NaN");
currentYaw = 0;
}
super.updateEntity();
// ugly, need to clean
currentPitch = currentPitch - ((currentPitch - targetPitch.get()) / KNOB_PITCH_CHANGE_SPEED);
currentYaw = GeometryUtils.normalizeAngle(currentYaw);
final double targetYaw = GeometryUtils.normalizeAngle(this.targetYaw.get());
if (Math.abs(currentYaw - targetYaw) < KNOB_YAW_CHANGE_SPEED) currentYaw = targetYaw;
else {
double dist = GeometryUtils.getAngleDistance(currentYaw, targetYaw);
currentYaw += KNOB_YAW_CHANGE_SPEED * Math.signum(dist);
}
currentSpeed = currentSpeed - ((currentSpeed - targetSpeed.get()) / KNOB_VEL_CHANGE_SPEED);
invalidateMotion();
if (!worldObj.isRemote) {
if (worldObj.getTotalWorldTime() % 20 == 0) {
if (worldObj.isBlockIndirectlyGettingPowered(xCoord, yCoord, zCoord)) {
ItemStack stack = findStack();
if (stack != null) fireStack(stack);
}
}
} else {
if (ticksSinceLastFire < 100) {
ticksSinceLastFire++;
}
}
}