// Helper function:
// Checks for collision of a moving aabbox with a static aabbox
// Returns -1 if no collision, 0 if X collision, 1 if Y collision, 2 if Z collision
// The time after which the collision occurs is stored in dtime.
int axisAlignedCollision(
const aabb3f &staticbox, const aabb3f &movingbox,
const v3f &speed, f32 d, f32 &dtime)
{
//TimeTaker tt("axisAlignedCollision");
f32 xsize = (staticbox.MaxEdge.X - staticbox.MinEdge.X);
f32 ysize = (staticbox.MaxEdge.Y - staticbox.MinEdge.Y);
f32 zsize = (staticbox.MaxEdge.Z - staticbox.MinEdge.Z);
aabb3f relbox(
movingbox.MinEdge.X - staticbox.MinEdge.X,
movingbox.MinEdge.Y - staticbox.MinEdge.Y,
movingbox.MinEdge.Z - staticbox.MinEdge.Z,
movingbox.MaxEdge.X - staticbox.MinEdge.X,
movingbox.MaxEdge.Y - staticbox.MinEdge.Y,
movingbox.MaxEdge.Z - staticbox.MinEdge.Z
);
if(speed.X > 0) // Check for collision with X- plane
{
if(relbox.MaxEdge.X <= d)
{
dtime = - relbox.MaxEdge.X / speed.X;
if((relbox.MinEdge.Y + speed.Y * dtime < ysize) &&
(relbox.MaxEdge.Y + speed.Y * dtime > 0) &&
(relbox.MinEdge.Z + speed.Z * dtime < zsize) &&
(relbox.MaxEdge.Z + speed.Z * dtime > 0))
return 0;
}
else if(relbox.MinEdge.X > xsize)
{
return -1;
}
}
else if(speed.X < 0) // Check for collision with X+ plane
{
if(relbox.MinEdge.X >= xsize - d)
{
dtime = (xsize - relbox.MinEdge.X) / speed.X;
if((relbox.MinEdge.Y + speed.Y * dtime < ysize) &&
(relbox.MaxEdge.Y + speed.Y * dtime > 0) &&
(relbox.MinEdge.Z + speed.Z * dtime < zsize) &&
(relbox.MaxEdge.Z + speed.Z * dtime > 0))
return 0;
}
else if(relbox.MaxEdge.X < 0)
{
return -1;
}
}
// NO else if here
if(speed.Y > 0) // Check for collision with Y- plane
{
if(relbox.MaxEdge.Y <= d)
{
dtime = - relbox.MaxEdge.Y / speed.Y;
if((relbox.MinEdge.X + speed.X * dtime < xsize) &&
(relbox.MaxEdge.X + speed.X * dtime > 0) &&
(relbox.MinEdge.Z + speed.Z * dtime < zsize) &&
(relbox.MaxEdge.Z + speed.Z * dtime > 0))
return 1;
}
else if(relbox.MinEdge.Y > ysize)
{
return -1;
}
}
else if(speed.Y < 0) // Check for collision with Y+ plane
{
if(relbox.MinEdge.Y >= ysize - d)
{
dtime = (ysize - relbox.MinEdge.Y) / speed.Y;
if((relbox.MinEdge.X + speed.X * dtime < xsize) &&
(relbox.MaxEdge.X + speed.X * dtime > 0) &&
(relbox.MinEdge.Z + speed.Z * dtime < zsize) &&
(relbox.MaxEdge.Z + speed.Z * dtime > 0))
return 1;
}
else if(relbox.MaxEdge.Y < 0)
{
return -1;
}
}
// NO else if here
if(speed.Z > 0) // Check for collision with Z- plane
{
if(relbox.MaxEdge.Z <= d)
{
dtime = - relbox.MaxEdge.Z / speed.Z;
if((relbox.MinEdge.X + speed.X * dtime < xsize) &&
(relbox.MaxEdge.X + speed.X * dtime > 0) &&
(relbox.MinEdge.Y + speed.Y * dtime < ysize) &&
(relbox.MaxEdge.Y + speed.Y * dtime > 0))
return 2;
}
//else if(relbox.MinEdge.Z > zsize)
//{
// return -1;
//}
}
else if(speed.Z < 0) // Check for collision with Z+ plane
{
if(relbox.MinEdge.Z >= zsize - d)
{
dtime = (zsize - relbox.MinEdge.Z) / speed.Z;
if((relbox.MinEdge.X + speed.X * dtime < xsize) &&
(relbox.MaxEdge.X + speed.X * dtime > 0) &&
(relbox.MinEdge.Y + speed.Y * dtime < ysize) &&
(relbox.MaxEdge.Y + speed.Y * dtime > 0))
return 2;
}
//else if(relbox.MaxEdge.Z < 0)
//{
// return -1;
//}
}
return -1;
}
// Helper function:
// Checks for collision of a moving aabbox with a static aabbox
// Returns -1 if no collision, 0 if X collision, 1 if Y collision, 2 if Z collision
// The time after which the collision occurs is stored in dtime.
int axisAlignedCollision(
const aabb3f &staticbox, const aabb3f &movingbox,
const v3f &speed, f32 d, f32 *dtime)
{
//TimeTaker tt("axisAlignedCollision");
f32 xsize = (staticbox.MaxEdge.X - staticbox.MinEdge.X); // - COLL_ZEROY; // reduce box size for solve collision stuck (flying sand)
f32 ysize = (staticbox.MaxEdge.Y - staticbox.MinEdge.Y); // - COLL_ZERO; // Y - no sense for falling, but maybe try later
f32 zsize = (staticbox.MaxEdge.Z - staticbox.MinEdge.Z); // - COLL_ZEROY;
aabb3f relbox(
movingbox.MinEdge.X - staticbox.MinEdge.X,
movingbox.MinEdge.Y - staticbox.MinEdge.Y,
movingbox.MinEdge.Z - staticbox.MinEdge.Z,
movingbox.MaxEdge.X - staticbox.MinEdge.X,
movingbox.MaxEdge.Y - staticbox.MinEdge.Y,
movingbox.MaxEdge.Z - staticbox.MinEdge.Z
);
// These cases can (and should) be rejected immediately
if( (speed.X >= 0 && relbox.MinEdge.X > xsize) ||
(speed.X <= 0 && relbox.MaxEdge.X < 0) ||
(speed.Y >= 0 && relbox.MinEdge.Y > ysize) ||
(speed.Y <= 0 && relbox.MaxEdge.Y < 0) ||
(speed.Z >= 0 && relbox.MinEdge.Z > zsize) ||
(speed.Z <= 0 && relbox.MaxEdge.Z < 0))
return -1;
if(speed.X > 0) // Check for collision with X- plane
{
if (relbox.MaxEdge.X <= d) {
*dtime = -relbox.MaxEdge.X / speed.X;
if ((relbox.MinEdge.Y + speed.Y * (*dtime) < ysize) &&
(relbox.MaxEdge.Y + speed.Y * (*dtime) > COLL_ZERO) &&
(relbox.MinEdge.Z + speed.Z * (*dtime) < zsize) &&
(relbox.MaxEdge.Z + speed.Z * (*dtime) > COLL_ZERO))
return 0;
}
}
else if(speed.X < 0) // Check for collision with X+ plane
{
if (relbox.MinEdge.X >= xsize - d) {
*dtime = (xsize - relbox.MinEdge.X) / speed.X;
if ((relbox.MinEdge.Y + speed.Y * (*dtime) < ysize) &&
(relbox.MaxEdge.Y + speed.Y * (*dtime) > COLL_ZERO) &&
(relbox.MinEdge.Z + speed.Z * (*dtime) < zsize) &&
(relbox.MaxEdge.Z + speed.Z * (*dtime) > COLL_ZERO))
return 0;
}
}
// NO else if here
if(speed.Y > 0) // Check for collision with Y- plane
{
if (relbox.MaxEdge.Y <= d) {
*dtime = -relbox.MaxEdge.Y / speed.Y;
if ((relbox.MinEdge.X + speed.X * (*dtime) < xsize) &&
(relbox.MaxEdge.X + speed.X * (*dtime) > COLL_ZERO) &&
(relbox.MinEdge.Z + speed.Z * (*dtime) < zsize) &&
(relbox.MaxEdge.Z + speed.Z * (*dtime) > COLL_ZERO))
return 1;
}
}
else if(speed.Y < 0) // Check for collision with Y+ plane
{
if (relbox.MinEdge.Y >= ysize - d) {
*dtime = (ysize - relbox.MinEdge.Y) / speed.Y;
if ((relbox.MinEdge.X + speed.X * (*dtime) < xsize) &&
(relbox.MaxEdge.X + speed.X * (*dtime) > COLL_ZEROY) &&
(relbox.MinEdge.Z + speed.Z * (*dtime) < zsize) &&
(relbox.MaxEdge.Z + speed.Z * (*dtime) > COLL_ZEROY))
return 1;
}
}
// NO else if here
if(speed.Z > 0) // Check for collision with Z- plane
{
if (relbox.MaxEdge.Z <= d) {
*dtime = -relbox.MaxEdge.Z / speed.Z;
if ((relbox.MinEdge.X + speed.X * (*dtime) < xsize) &&
(relbox.MaxEdge.X + speed.X * (*dtime) > COLL_ZERO) &&
(relbox.MinEdge.Y + speed.Y * (*dtime) < ysize) &&
(relbox.MaxEdge.Y + speed.Y * (*dtime) > COLL_ZERO))
return 2;
}
}
else if(speed.Z < 0) // Check for collision with Z+ plane
{
if (relbox.MinEdge.Z >= zsize - d) {
*dtime = (zsize - relbox.MinEdge.Z) / speed.Z;
if ((relbox.MinEdge.X + speed.X * (*dtime) < xsize) &&
(relbox.MaxEdge.X + speed.X * (*dtime) > COLL_ZERO) &&
(relbox.MinEdge.Y + speed.Y * (*dtime) < ysize) &&
(relbox.MaxEdge.Y + speed.Y * (*dtime) > COLL_ZERO))
return 2;
}
}
return -1;
}
// Helper function:
// Checks for collision of a moving aabbox with a static aabbox
// Returns -1 if no collision, 0 if X collision, 1 if Y collision, 2 if Z collision
// The time after which the collision occurs is stored in dtime.
int axisAlignedCollision(
const aabb3f &staticbox, const aabb3f &movingbox,
const v3f &speed, f32 d, f32 &dtime)
{
//TimeTaker tt("axisAlignedCollision");
f32 xsize = (staticbox.MaxEdge.X - staticbox.MinEdge.X) - COLL_ZERO; // reduce box size for solve collision stuck (flying sand)
f32 ysize = (staticbox.MaxEdge.Y - staticbox.MinEdge.Y); // - COLL_ZERO; // Y - no sense for falling, but maybe try later
f32 zsize = (staticbox.MaxEdge.Z - staticbox.MinEdge.Z) - COLL_ZERO;
aabb3f relbox(
movingbox.MinEdge.X - staticbox.MinEdge.X,
movingbox.MinEdge.Y - staticbox.MinEdge.Y,
movingbox.MinEdge.Z - staticbox.MinEdge.Z,
movingbox.MaxEdge.X - staticbox.MinEdge.X,
movingbox.MaxEdge.Y - staticbox.MinEdge.Y,
movingbox.MaxEdge.Z - staticbox.MinEdge.Z
);
if(speed.X > 0) // Check for collision with X- plane
{
if(relbox.MaxEdge.X <= d)
{
dtime = - relbox.MaxEdge.X / speed.X;
if((relbox.MinEdge.Y + speed.Y * dtime < ysize) &&
(relbox.MaxEdge.Y + speed.Y * dtime > COLL_ZERO) &&
(relbox.MinEdge.Z + speed.Z * dtime < zsize) &&
(relbox.MaxEdge.Z + speed.Z * dtime > COLL_ZERO))
return 0;
}
else if(relbox.MinEdge.X > xsize)
{
return -1;
}
}
else if(speed.X < 0) // Check for collision with X+ plane
{
if(relbox.MinEdge.X >= xsize - d)
{
dtime = (xsize - relbox.MinEdge.X) / speed.X;
if((relbox.MinEdge.Y + speed.Y * dtime < ysize) &&
(relbox.MaxEdge.Y + speed.Y * dtime > COLL_ZERO) &&
(relbox.MinEdge.Z + speed.Z * dtime < zsize) &&
(relbox.MaxEdge.Z + speed.Z * dtime > COLL_ZERO))
return 0;
}
else if(relbox.MaxEdge.X < 0)
{
return -1;
}
}
// NO else if here
if(speed.Y > 0) // Check for collision with Y- plane
{
if(relbox.MaxEdge.Y <= d)
{
dtime = - relbox.MaxEdge.Y / speed.Y;
if((relbox.MinEdge.X + speed.X * dtime < xsize) &&
(relbox.MaxEdge.X + speed.X * dtime > COLL_ZERO) &&
(relbox.MinEdge.Z + speed.Z * dtime < zsize) &&
(relbox.MaxEdge.Z + speed.Z * dtime > COLL_ZERO))
return 1;
}
else if(relbox.MinEdge.Y > ysize)
{
return -1;
}
}
else if(speed.Y < 0) // Check for collision with Y+ plane
{
if(relbox.MinEdge.Y >= ysize - d)
{
dtime = (ysize - relbox.MinEdge.Y) / speed.Y;
if((relbox.MinEdge.X + speed.X * dtime < xsize) &&
(relbox.MaxEdge.X + speed.X * dtime > COLL_ZERO) &&
(relbox.MinEdge.Z + speed.Z * dtime < zsize) &&
(relbox.MaxEdge.Z + speed.Z * dtime > COLL_ZERO))
return 1;
}
else if(relbox.MaxEdge.Y < 0)
{
return -1;
}
}
// NO else if here
if(speed.Z > 0) // Check for collision with Z- plane
{
if(relbox.MaxEdge.Z <= d)
{
dtime = - relbox.MaxEdge.Z / speed.Z;
if((relbox.MinEdge.X + speed.X * dtime < xsize) &&
(relbox.MaxEdge.X + speed.X * dtime > COLL_ZERO) &&
(relbox.MinEdge.Y + speed.Y * dtime < ysize) &&
(relbox.MaxEdge.Y + speed.Y * dtime > COLL_ZERO))
return 2;
}
//else if(relbox.MinEdge.Z > zsize)
//{
// return -1;
//}
}
else if(speed.Z < 0) // Check for collision with Z+ plane
{
if(relbox.MinEdge.Z >= zsize - d)
{
dtime = (zsize - relbox.MinEdge.Z) / speed.Z;
if((relbox.MinEdge.X + speed.X * dtime < xsize) &&
(relbox.MaxEdge.X + speed.X * dtime > COLL_ZERO) &&
(relbox.MinEdge.Y + speed.Y * dtime < ysize) &&
(relbox.MaxEdge.Y + speed.Y * dtime > COLL_ZERO))
return 2;
}
//else if(relbox.MaxEdge.Z < 0)
//{
// return -1;
//}
}
return -1;
}
