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somehow fixed a phys bug where heavier objects accelerate more by gravity

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Former-commit-id: 5a39d6495c861f9abe32b09db4bba8f26667de95
Former-commit-id: f9b8307b6371d553174f268f812a2edc71324a34
This commit is contained in:
Song Minjae
2017-01-31 01:01:51 +09:00
parent 6ccc964d05
commit ad148a05f4
1 changed files with 3 additions and 3 deletions
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6
src/net/torvald/terrarum/gameactors/ActorWithSprite.kt
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@@ -460,18 +460,18 @@ open class ActorWithSprite(renderOrder: ActorOrder, val immobileBody: Boolean =
* weight; gravitational force in action
* W = mass * G (9.8 [m/s^2])
*/
val W: Vector2 = gravitation * mass
val W: Vector2 = gravitation * Terrarum.TARGET_FPS.toDouble()
/**
* Area
*/
val A: Double = scale * scale
val A: Double = (scale * baseHitboxW / METER) * (scale * baseHitboxW / METER)
/**
* Drag of atmosphere
* D = Cd (drag coefficient) * 0.5 * rho (density) * V^2 (velocity sqr) * A (area)
*/
val D: Vector2 = Vector2(moveDelta.x.magnSqr(), moveDelta.y.magnSqr()) * dragCoefficient * 0.5 * A// * tileDensityFluid.toDouble()
val V: Vector2 = (W - D) / mass * SI_TO_GAME_ACC
val V: Vector2 = (W - D) / Terrarum.TARGET_FPS.toDouble() * SI_TO_GAME_ACC
applyForce(V)
}