Step()

static BallStepResult Terraria.Physics.BallCollision.Step ( PhysicsProperties physicsProperties, Entity entity, ref float entityAngularVelocity, IBallContactListener listener )

inlinestatic

Definition at line 24 of file BallCollision.cs.

    {
        Vector2 position = entity.position;
        Vector2 velocity = entity.velocity;
        Vector2 size = entity.Size;
        float num = entityAngularVelocity;
        float num2 = size.X * 0.5f;
        num *= physicsProperties.Drag;
        velocity *= physicsProperties.Drag;
        float num3 = velocity.Length();
        if (num3 > 1000f)
        {
            velocity = 1000f * Vector2.Normalize(velocity);
            num3 = 1000f;
        }
        int num4 = Math.Max(1, (int)Math.Ceiling(num3 / 2f));
        float num5 = 1f / (float)num4;
        velocity *= num5;
        num *= num5;
        float num6 = physicsProperties.Gravity / (float)(num4 * num4);
        bool flag = false;
        for (int i = 0; i < num4; i++)
        {
            velocity.Y += num6;
            if (CheckForPassThrough(position + size * 0.5f, out var type, out var contactTile))
            {
                if (type == BallPassThroughType.Tile && Main.tileSolid[contactTile.type] && !Main.tileSolidTop[contactTile.type])
                {
                    velocity *= 0f;
                    num *= 0f;
                    flag = true;
                }
                else
                {
                    BallPassThroughEvent passThrough = new BallPassThroughEvent(num5, contactTile, entity, type);
                    listener.OnPassThrough(physicsProperties, ref position, ref velocity, ref num, ref passThrough);
                }
            }
            position += velocity;
            if (!IsBallInWorld(position, size))
            {
                return BallStepResult.OutOfBounds();
            }
            if (GetClosestEdgeToCircle(position, size, velocity, out var collisionPoint, out contactTile))
            {
                Vector2 vector = Vector2.Normalize(position + size * 0.5f - collisionPoint);
                position = collisionPoint + vector * (num2 + 0.0001f) - size * 0.5f;
                BallCollisionEvent collision = new BallCollisionEvent(num5, vector, collisionPoint, contactTile, entity);
                flag = true;
                velocity = Vector2.Reflect(velocity, collision.Normal);
                listener.OnCollision(physicsProperties, ref position, ref velocity, ref collision);
                num = (collision.Normal.X * velocity.Y - collision.Normal.Y * velocity.X) / num2;
            }
        }
        velocity /= num5;
        num /= num5;
        BallStepResult result = BallStepResult.Moving();
        if (flag && velocity.X > -0.01f && velocity.X < 0.01f && velocity.Y <= 0f && velocity.Y > 0f - physicsProperties.Gravity)
        {
            result = BallStepResult.Resting();
        }
        entity.position = position;
        entity.velocity = velocity;
        entityAngularVelocity = num;
        return result;
    }

References System.Math.Ceiling(), Terraria.Physics.BallCollision.CheckForPassThrough(), Terraria.Physics.PhysicsProperties.Drag, Terraria.Physics.BallCollision.GetClosestEdgeToCircle(), Terraria.Physics.PhysicsProperties.Gravity, Terraria.Physics.BallCollision.IsBallInWorld(), Microsoft.Xna.Framework.Vector2.Length(), System.Math.Max(), Terraria.Physics.BallStepResult.Moving(), Microsoft.Xna.Framework.Vector2.Normalize(), Terraria.Physics.IBallContactListener.OnCollision(), Terraria.Physics.IBallContactListener.OnPassThrough(), Terraria.Physics.BallStepResult.OutOfBounds(), Terraria.Entity.position, Microsoft.Xna.Framework.Vector2.Reflect(), Terraria.Physics.BallStepResult.Resting(), Terraria.Entity.Size, Terraria.Main.tileSolid, Terraria.Main.tileSolidTop, System.type, Terraria.Entity.velocity, Microsoft.Xna.Framework.Vector2.X, and Microsoft.Xna.Framework.Vector2.Y.

Referenced by Terraria.GameContent.Golf.GolfHelper.StepGolfBall().