Fires projectiles at creeper, bots and digitalis in range. Used by several player ships.

Arguments

turbo (bool)

If true, weapon's fire rate is increased tremendously

fire_range (int)

Maximum distance in map pixels at which weapon will aim and fire at targets

manual_mode (bool)

If true, cannon aims toward cursor and fires when left mouse button is clicked; if false, cannon aims and fires automatically

rotate_speed (float)

Maximum turn rate of cannon in degrees per frame (in manual mode cannon rotates instantly to face cursor regardless of rotate_speed)