karl
219c8731f5
Works fairly well, although it doesn't account for changing acceleration which happens due to the changing gravity. I guess this is good enough, since it does hit if the player isn't careful
34 lines
1.1 KiB
GDScript
34 lines
1.1 KiB
GDScript
extends Spatial
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class_name SolarSystem
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const G = 6.674 * pow(10, -11)
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# Because we're dealing with a miniature, we want small masses and distances to have noticeable
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# gravitational effects. These multipliers adapt the scale of the game to an earth-like scale.
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const mass_multiplier = pow(10, 24) # thus, the earth would get a mass of 6
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const distance_multiplier = 318550 # thus, a radius of 20 results in an earth-like radius
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# If the gravity doesn't feel like it should, this scales it. A higher value means that the pull is
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# stronger.
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const gravity_multiplier = 10.0
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func get_gravitation_acceleration(position: Vector3) -> Vector3:
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var total_force = Vector3.ZERO
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for planet in get_children():
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var pos_to_center = (planet.transform.origin - position)
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var distance = pos_to_center.length()
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var force = _gravity(planet.mass * mass_multiplier, distance * distance_multiplier)
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force *= gravity_multiplier
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total_force += (pos_to_center / distance) * force
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return total_force
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# Formula for gravity
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static func _gravity(mass, distance):
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return (G * mass) / (distance * distance)
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