internal void ReactToHit(float damage, CCPoint collisionPos)
{
const float MAX_DISTANCE_FROM_COLLISION = 200f;
float maxDistanceFromCollision = ((ContentSize.Width + ContentSize.Height) / 4) * GetTotalScale();
if (maxDistanceFromCollision > MAX_DISTANCE_FROM_COLLISION)
{
maxDistanceFromCollision = MAX_DISTANCE_FROM_COLLISION;
}
// generate a random point near the collisionPos
// and show an effect there
Random rng = new Random();
for (int tries = 0; tries < 5; tries++)
{
CCPoint randomPoint = Constants.RandomPointNear(collisionPos, maxDistanceFromCollision, rng);
//CCPoint randomPoint = collisionPos;
if (Collisions.CollidePositionPolygon(randomPoint, this) || tries == 4) // check whether the random point is inside the collision polygon
{
CCPoint relativePosition = randomPoint - PositionWorldspace;
relativePosition = CCPoint.RotateByAngle(relativePosition, CCPoint.Zero, -Constants.CCDegreesToMathRadians(TotalRotation));
// react differently depending upon how damaged you now are
float refSize = DamageToReferenceSize(damage);
var damageTail = new DamageCloudTailNode(refSize, relativePosition);
if (Aircraft.SelectedPower != PowerUp.PowerType.SHIELD)
{
if (Health / MaxHealth > 0.7f)
{
damageTail.AutoAddClouds = false;
}
if (Health / MaxHealth < 0.5f)
{
var planeColor = ((PlayLayer)Layer).CurrentPlaneColor;
var baseFlameColor = new CCColor4B((byte)rng.Next(0, 256), 0, 0);
var h = (new SKColor(planeColor.R, planeColor.G, planeColor.B)).Hue;
damageTail.CloudColor = Constants.MoveHue(baseFlameColor, h);
}
damageTail.CloudLifeTime += (refSize - 8f) * 0.1f;
}
else
{
damageTail.AutoAddClouds = false;
}
DamageCloudTailNodes.Add(damageTail);
break;
}
}
// shake!
if (Aircraft.ControlledByPlayer && Aircraft.SelectedPower != PowerUp.PowerType.SHIELD)
{
// the shake amount depends on the damage, but mostly on how the damage relates to the max health
float baseRefSize = DamageToReferenceSize(damage, 10f);
float specialBonus = 0f;
float healthFactor = damage / MaxHealth;
if (healthFactor > 1)
{
healthFactor = 1;
}
if (Health <= 0)
{
baseRefSize *= (1 + TotalParts.Count()) * 0.8f;
specialBonus += (float)Math.Sqrt(TotalMaxHealth) * 3;
}
float shakeAmount = baseRefSize * 10 * healthFactor + specialBonus;
((PlayLayer)Layer).AddScreenShake(shakeAmount, shakeAmount);
}
}