void Start()
{
UpdateHealthCounter();
physEngine = Camera.main.GetComponent <PhysEngine>();
}
void Start ()
{
UpdateHealthCounter ();
physEngine = Camera.main.GetComponent<PhysEngine>();
}
// Use this for initialization
void Start () {
peo = GetComponent<PE_Obj>();
physEngine = Camera.main.GetComponent<PhysEngine>();
}
void ResolveCollisionWith(PE_Obj that)
{
// Assumes that "that" is still
// Vector3 posFinal;
posFinal = pos1; // Sets a defaut value for posFinal
switch (this.coll)
{
case PE_Collider.sphere:
switch (that.coll)
{
case PE_Collider.sphere:
// Sphere / Sphere collision
float thisR, thatR, rad;
// Note, this doesn't work with non-uniform or negative scales!
thisR = Mathf.Max(this.transform.lossyScale.x, this.transform.lossyScale.y, this.transform.lossyScale.z) / 2;
thatR = Mathf.Max(that.transform.lossyScale.x, that.transform.lossyScale.y, that.transform.lossyScale.z) / 2;
rad = thisR + thatR;
Vector3 delta = pos1 - that.transform.position;
delta.Normalize();
delta *= rad;
posFinal = that.transform.position + delta;
break;
}
break;
case PE_Collider.aabb:
switch (that.coll)
{
case PE_Collider.aabb:
// AABB / AABB collision
// Axis-Aligned Bounding Box
// With AABB collisions, we're usually concerned with corners and deciding which corner to consider when making comparisons.
// I believe that this corner should be determined by looking at the velocity of the moving body (this one)
// Vector3 a0, a1, b, delta, pU;
// a0-moving corner last frame, a1-moving corner now, b-comparison corner on other object
a0 = a1 = b = Vector3.zero; // Sets a default value to keep the compiler from complaining
delta = pos1 - pos0;
if (dir == PE_Dir.down)
{
// If a0 was above b and a1 is below b resolve to be on top
a1 = pos1;
a1.y -= transform.collider.bounds.size.y / 2f;
a0 = a1 - delta;
b = that.pos1;
b.y += that.transform.collider.bounds.size.y / 2f;
if (PhysEngine.GEQ(a0.y, b.y) && b.y > a1.y)
{
posFinal.y += Mathf.Abs(a1.y - b.y);
// Handle vel
vel.y = 0;
if (ground == null)
{
ground = that;
}
}
break; // Exit this switch statement: switch (that.coll)
}
if (dir == PE_Dir.up)
{
// If a0 was below b and a1 is above b resolve to be below
a1 = pos1;
a1.y += transform.collider.bounds.size.y / 2f;
a0 = a1 - delta;
b = that.pos1;
b.y -= that.transform.collider.bounds.size.y / 2f;
if (PhysEngine.LEQ(a0.y, b.y) && b.y < a1.y)
{
posFinal.y -= Mathf.Abs(a1.y - b.y);
// Handle vel
vel.y = 0;
break; // Exit this switch statement: switch (that.coll)
}
}
if (dir == PE_Dir.upRight) // Bottom, Left is the comparison corner
{
a1 = pos1;
a1.x += transform.collider.bounds.size.x / 2f;
a1.y += transform.collider.bounds.size.y / 2f;
a0 = a1 - delta;
b = that.pos1;
b.x -= that.transform.collider.bounds.size.x / 2f;
b.y -= that.transform.collider.bounds.size.y / 2f;
}
if (dir == PE_Dir.upLeft) // Bottom, Right is the comparison corner
{
a1 = pos1;
a1.x -= transform.collider.bounds.size.x / 2f;
a1.y += transform.collider.bounds.size.y / 2f;
a0 = a1 - delta;
b = that.pos1;
b.x += that.transform.collider.bounds.size.x / 2f;
b.y -= that.transform.collider.bounds.size.y / 2f;
}
if (dir == PE_Dir.downLeft) // Top, Right is the comparison corner
{
a1 = pos1;
a1.x -= transform.collider.bounds.size.x / 2f;
a1.y -= transform.collider.bounds.size.y / 2f;
a0 = a1 - delta;
b = that.pos1;
b.x += that.transform.collider.bounds.size.x / 2f;
b.y += that.transform.collider.bounds.size.y / 2f;
}
if (dir == PE_Dir.downRight) // Top, Left is the comparison corner
{
a1 = pos1;
a1.x += transform.collider.bounds.size.x / 2f;
a1.y -= transform.collider.bounds.size.y / 2f;
a0 = a1 - delta;
b = that.pos1;
b.x -= that.transform.collider.bounds.size.x / 2f;
b.y += that.transform.collider.bounds.size.y / 2f;
}
// In the x dimension, find how far along the line segment between a0 and a1 we need to go to encounter b
float u = (b.x - a0.x) / (a1.x - a0.x);
// Determine this point using linear interpolation (see the appendix of the book)
pU = (1 - u) * a0 + u * a1;
// Find distance we would have to offset in x or y
float offsetX = Mathf.Abs(a1.x - b.x);
float offsetY = Mathf.Abs(a1.y - b.y);
// Use pU.y vs. b.y to tell which side of PE_Obj "that" PE_Obj "this" should be on
switch (dir)
{
case PE_Dir.upRight:
if (pU.y > b.y || PhysEngine.EQ(u, 0)) // hit the left side
{
posFinal.x -= offsetX;
// Handle vel
vel.x = 0;
}
else // hit the bottom
{
posFinal.y -= offsetY;
// Handle vel
vel.y = 0;
}
break;
case PE_Dir.downRight:
if (pU.y < b.y || PhysEngine.EQ(u, 0)) // hit the left side
{
posFinal.x -= offsetX;
// Handle vel
vel.x = 0;
}
else // hit the top
{
posFinal.y += offsetY;
// Handle vel
vel.y = 0;
if (ground == null)
{
ground = that;
}
}
break;
case PE_Dir.upLeft:
if (pU.y > b.y || PhysEngine.EQ(u, 0)) // hit the right side
{
posFinal.x += offsetX;
// Handle vel
vel.x = 0;
}
else // hit the bottom
{
posFinal.y -= offsetY;
// Handle vel
vel.y = 0;
}
break;
case PE_Dir.downLeft:
if (pU.y < b.y || PhysEngine.EQ(u, 0)) // hit the right side
{
posFinal.x += offsetX;
// Handle vel
vel.x = 0;
}
else // hit the top
{
posFinal.y += offsetY;
// Handle vel
vel.y = 0;
if (ground == null)
{
ground = that;
}
}
break;
}
break;
}
break;
}
transform.position = pos1 = posFinal;
}
// Use this for initialization
void Start()
{
peo = GetComponent <PE_Obj>();
physEngine = Camera.main.GetComponent <PhysEngine>();
}