private void Spawn()
{
GameObject snowballObject = Instantiate(snowballPrefab);
SlashableSnowball snowball = snowballObject.GetComponent <SlashableSnowball>();
snowballObject.transform.position = new Vector3(
spawnArea.x - (spawnArea.width / 2) + spawnArea.width * Random.value,
spawnArea.y - (spawnArea.height / 2) + spawnArea.height * Random.value);
Vector2 destination = new Vector3(
targetArea.x - (targetArea.width / 2) + targetArea.width * Random.value,
targetArea.y - (targetArea.height / 2) + targetArea.height * Random.value);
Vector2 direction = (destination - (Vector2)snowballObject.transform.position).normalized;
snowball.AddForce(direction * (MinForce + (MaxForce - MinForce) * Random.value));
}
void ISwipeSlashable.OnSwipeSlash(Vector2 start, Vector2 end)
{
// If the snowball is invulnerable (ie. immediately after it is spawned), ignore the slash
if (Time.unscaledTime < invulnerabilityStartTime + InvulverabilityDuration)
{
return;
}
// Calculate the closest point along the slash line to the center of the snow ball
Vector2 center = (Vector2)transform.position;
Vector2 direction = (end - start).normalized;
Vector2 startToCenter = (Vector2)transform.position - start;
Vector2 closestPoint = start + Vector3.Dot(startToCenter, direction) * direction;
// Calculate how cleanly the snowball should be cut in half based on how close the
// slash passed by the center point
float distanceFromCenter = (closestPoint - center).magnitude;
float scaledRadius = circleCollider.radius * transform.localScale.x;
float scaleOfSmallerNewSnowball = (0.5f - (distanceFromCenter / scaledRadius) / 2) * transform.localScale.x;
// Create two new, smaller snowballs on either side of the slash
if (scaleOfSmallerNewSnowball > 0f)
{
// Instantiate the snowballs and get their snowball components
GameObject smallSnowBallObject = Instantiate(snowballPrefab);
GameObject largeSnowBallObject = Instantiate(snowballPrefab);
SlashableSnowball smallSnowBall = smallSnowBallObject.GetComponent <SlashableSnowball>();
SlashableSnowball largeSnowBall = largeSnowBallObject.GetComponent <SlashableSnowball>();
// Set the scale of the two new snowballs based on where the original snowball was slashed
smallSnowBall.transform.localScale = Vector3.one * scaleOfSmallerNewSnowball;
largeSnowBall.transform.localScale = Vector3.one * (transform.localScale.x - scaleOfSmallerNewSnowball);
// Set the positions of the two new snowballs based on where the original snowball was slashed
Vector2 directionFromCenter = (closestPoint - center).normalized;
smallSnowBall.transform.position = closestPoint + directionFromCenter * smallSnowBall.circleCollider.radius * smallSnowBall.transform.localScale.x;
largeSnowBall.transform.position = closestPoint - directionFromCenter * largeSnowBall.circleCollider.radius * largeSnowBall.transform.localScale.x;
// Set the velocity of the two new snowballs based on where the original snowball was slashed
smallSnowBall.AddForce(velocity + directionFromCenter * VelocityOnSlash);
largeSnowBall.AddForce(velocity - directionFromCenter * VelocityOnSlash);
}
// This snowball, now cut in two, should be destroyed
Destroy(gameObject);
}