// Here we have four cases:
// 1) both creatures do not have plates/spines attached
// 2) the creature that collided had at least one spine attached and the one that took the collision had no plates
// 3) the creature that collided had no spines attached and the one that took the collision had at least one plate
// 4) both creatures have at least one plate/spine attached
// for case 1), if the creature that collided first is a carnivore then the other one if it is a herbivore, it immediately dies
// for case 2), the result is instant death for the creature that took the collision
// for case 3), the result is -25 hp to the creature that collided first
// for case 4), both creatures take some damage, -25 hp for the creature that collided first and the same for the creature that took the collision.
// if hp of creature reaches 0, the creature is dead.
private void OnTriggerEnter(Collider other)
{
// save the tags of the creatures in two strings for easier comparison
// save the creature's attachments that did the collision first in an array
// use similar method to the first one to identify the joints of the creature that collided
// get the healthscript of the creature that collided first so that we can increase/decrease/zero the health according to each case
string collideOne = other.tag;
string collideTwo = creatureRigidbody.tag;
FixedJoint[] colliderFixedJoints;
colliderFixedJoints = other.GetComponentsInChildren <FixedJoint>();
HealthScript otherHealthScript = other.gameObject.GetComponent <HealthScript>();
int otherSpineNum = 0;
int otherPlateNum = 0;
for (int i = 0; i < colliderFixedJoints.Length; i++)
{
if (colliderFixedJoints[i].connectedBody.tag == "Spine")
{
otherSpineNum = otherSpineNum + 1;
}
if (colliderFixedJoints[i].connectedBody.tag == "Plate")
{
otherPlateNum = otherPlateNum + 1;
}
}
// first case: a herbivore gets attacked by a carnivore (this means that the script is attached on a herbivore gameobject)
if (collideOne == "Carnivore")
{
if (collideTwo == "Herbivore")
{
if (otherSpineNum == 0 && plateNum == 0)
{
Debug.Log("Carnivore with no spines attacked and killed herbivore with no plates");
// kill the herbivore
healthScript.setHP(0);
// increase carnivore's life by 10
otherHealthScript.IncreaseHP(10);
}
else if (otherSpineNum != 0 && plateNum == 0)
{
Debug.Log("Carnivore with at least one spine attacked and killed herbivore with no plates");
// kill the herbivore
healthScript.setHP(0);
// increase carnivore's life by 10
otherHealthScript.IncreaseHP(10);
}
else if (otherSpineNum == 0 && plateNum != 0)
{
Debug.Log("Carnivore with no spines attacked a herbivore with at least one plate");
// carnivore's hp reduced by 25
otherHealthScript.DecreaseHP(25);
}
else if (otherSpineNum != 0 && plateNum != 0)
{
Debug.Log("Carnivore with at least one spine attacked a herbivore with at least one plate");
// herbivore's hp reduced by 25
healthScript.DecreaseHP(25);
// carnivore's hp reduced by 25
otherHealthScript.DecreaseHP(25);
}
}
}
// second case: a carnivore collides with a herbivore (this means that the script is attached on a carnivore gameobject)
else if (collideOne == "Herbivore")
{
if (collideTwo == "Carnivore")
{
if (spineNum == 0 && otherPlateNum == 0)
{
Debug.Log("Carnivore with no spines collided and killed herbivore with no plates");
// kill the herbivore
otherHealthScript.setHP(0);
// increase carnivore's life by 10
healthScript.IncreaseHP(10);
}
else if (spineNum != 0 && otherPlateNum == 0)
{
Debug.Log("Carnivore with at least one spine collided and killed herbivore with no plates");
// kill the herbivore
otherHealthScript.setHP(0);
// increase carnivore's life by 10
healthScript.IncreaseHP(10);
}
else if (spineNum == 0 && otherPlateNum != 0)
{
Debug.Log("Carnivore with no spines collided a herbivore with at least one plate");
// carnivore's hp reduced by 25
healthScript.DecreaseHP(25);
}
else if (spineNum != 0 && otherPlateNum != 0)
{
Debug.Log("Carnivore with at least one spine collided a herbivore with at least one plate");
// herbivore's hp reduced by 25
otherHealthScript.DecreaseHP(25);
// carnivore's hp reduced by 25
healthScript.DecreaseHP(25);
}
}
}
}