Beispiel #1
0
        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);
            }
        }