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add a random starting x direction to the ball

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this means the ball can either go left or righ randomly instead of always going left.
This commit is contained in:
Fries 2023-05-17 14:16:31 -07:00
parent 133e0fb734
commit e50f0aefb1
1 changed files with 18 additions and 1 deletions
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19
Scripts/Ball.cs
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@ -18,8 +18,9 @@ public partial class Ball : CharacterBody2D
{
// this should dispose when this method goes out of scope (this means after the velocity variable is assigned)
using var rng = new RandomNumberGenerator();
rng.Randomize();
// set the velocity currently to the left of the screen with a random y angle.
_velocity = Vector2.Left * BallSpeed + new Vector2(0, rng.RandfRange(-_maxRandomAngle, _maxRandomAngle) * BallSpeed);
_velocity = GetRandomStartingDirection() * BallSpeed + new Vector2(0, rng.RandfRange(-_maxRandomAngle, _maxRandomAngle) * BallSpeed);
}
public override void _PhysicsProcess(double delta)
@ -38,4 +39,20 @@ public partial class Ball : CharacterBody2D
if (collision == null) return;
_velocity = _velocity.Bounce(collision.GetNormal());
}
/// <summary>
/// this method generates a random number between 0 and 1 and
/// either returns Vector2.Left or Vector2.Right based on that number.
/// </summary>
private Vector2 GetRandomStartingDirection() {
using var rng = new RandomNumberGenerator();
rng.Randomize();
var range = rng.RandiRange(0,1);
if (range == 0) {
return Vector2.Left;
}
return Vector2.Right;
}
}