LLVector3d LLWorld::clipToVisibleRegions(const LLVector3d &start_pos, const LLVector3d &end_pos)
{
if (positionRegionValidGlobal(end_pos))
{
return end_pos;
}
LLViewerRegion* regionp = getRegionFromPosGlobal(start_pos);
if (!regionp)
{
return start_pos;
}
LLVector3d delta_pos = end_pos - start_pos;
LLVector3d delta_pos_abs;
delta_pos_abs.setVec(delta_pos);
delta_pos_abs.abs();
LLVector3 region_coord = regionp->getPosRegionFromGlobal(end_pos);
F64 clip_factor = 1.0;
F32 region_width = regionp->getWidth();
if (region_coord.mV[VX] < 0.f)
{
if (region_coord.mV[VY] < region_coord.mV[VX])
{
// clip along y -
clip_factor = -(region_coord.mV[VY] / delta_pos_abs.mdV[VY]);
}
else
{
// clip along x -
clip_factor = -(region_coord.mV[VX] / delta_pos_abs.mdV[VX]);
}
}
else if (region_coord.mV[VX] > region_width)
{
if (region_coord.mV[VY] > region_coord.mV[VX])
{
// clip along y +
clip_factor = (region_coord.mV[VY] - region_width) / delta_pos_abs.mdV[VY];
}
else
{
//clip along x +
clip_factor = (region_coord.mV[VX] - region_width) / delta_pos_abs.mdV[VX];
}
}
else if (region_coord.mV[VY] < 0.f)
{
// clip along y -
clip_factor = -(region_coord.mV[VY] / delta_pos_abs.mdV[VY]);
}
else if (region_coord.mV[VY] > region_width)
{
// clip along y +
clip_factor = (region_coord.mV[VY] - region_width) / delta_pos_abs.mdV[VY];
}
// clamp to < 256 to stay in sim
LLVector3d final_region_pos = LLVector3d(region_coord) - (delta_pos * clip_factor);
final_region_pos.clamp(0.0, 255.999);
return regionp->getPosGlobalFromRegion(LLVector3(final_region_pos));
}
LLVector3d LLWorld::clipToVisibleRegions(const LLVector3d &start_pos, const LLVector3d &end_pos)
{
if (positionRegionValidGlobal(end_pos))
{
return end_pos;
}
LLViewerRegion* regionp = getRegionFromPosGlobal(start_pos);
if (!regionp)
{
return start_pos;
}
LLVector3d delta_pos = end_pos - start_pos;
LLVector3d delta_pos_abs;
delta_pos_abs.setVec(delta_pos);
delta_pos_abs.abs();
LLVector3 region_coord = regionp->getPosRegionFromGlobal(end_pos);
F64 clip_factor = 1.0;
F32 region_width = regionp->getWidth();
if (region_coord.mV[VX] < 0.f)
{
if (region_coord.mV[VY] < region_coord.mV[VX])
{
// clip along y -
clip_factor = -(region_coord.mV[VY] / delta_pos_abs.mdV[VY]);
}
else
{
// clip along x -
clip_factor = -(region_coord.mV[VX] / delta_pos_abs.mdV[VX]);
}
}
else if (region_coord.mV[VX] > region_width)
{
if (region_coord.mV[VY] > region_coord.mV[VX])
{
// clip along y +
clip_factor = (region_coord.mV[VY] - region_width) / delta_pos_abs.mdV[VY];
}
else
{
//clip along x +
clip_factor = (region_coord.mV[VX] - region_width) / delta_pos_abs.mdV[VX];
}
}
else if (region_coord.mV[VY] < 0.f)
{
// clip along y -
clip_factor = -(region_coord.mV[VY] / delta_pos_abs.mdV[VY]);
}
else if (region_coord.mV[VY] > region_width)
{
// clip along y +
clip_factor = (region_coord.mV[VY] - region_width) / delta_pos_abs.mdV[VY];
}
// clamp to within region dimensions
LLVector3d final_region_pos = LLVector3d(region_coord) - (delta_pos * clip_factor);
final_region_pos.mdV[VX] = llclamp(final_region_pos.mdV[VX], 0.0,
(F64)(region_width - F_ALMOST_ZERO));
final_region_pos.mdV[VY] = llclamp(final_region_pos.mdV[VY], 0.0,
(F64)(region_width - F_ALMOST_ZERO));
final_region_pos.mdV[VZ] = llclamp(final_region_pos.mdV[VZ], 0.0,
(F64)(LLWorld::getInstance()->getRegionMaxHeight() - F_ALMOST_ZERO));
return regionp->getPosGlobalFromRegion(LLVector3(final_region_pos));
}
LLVector3d LLWorld::clipToVisibleRegions(const LLVector3d &start_pos, const LLVector3d &end_pos)
{
if (positionRegionValidGlobal(end_pos))
{
return end_pos;
}
LLViewerRegion* regionp = getRegionFromPosGlobal(start_pos);
if (!regionp)
{
return start_pos;
}
LLVector3d delta_pos = end_pos - start_pos;
LLVector3d delta_pos_abs;
delta_pos_abs.setVec(delta_pos);
delta_pos_abs.abs();
LLVector3 region_coord = regionp->getPosRegionFromGlobal(end_pos);
F64 clip_factor = 1.0;
F32 region_width = regionp->getWidth();
if (region_coord.mV[VX] < 0.f)
{
if (region_coord.mV[VY] < region_coord.mV[VX])
{
// clip along y -
clip_factor = -(region_coord.mV[VY] / delta_pos_abs.mdV[VY]);
}
else
{
// clip along x -
clip_factor = -(region_coord.mV[VX] / delta_pos_abs.mdV[VX]);
}
}
else if (region_coord.mV[VX] > region_width)
{
if (region_coord.mV[VY] > region_coord.mV[VX])
{
// clip along y +
clip_factor = (region_coord.mV[VY] - region_width) / delta_pos_abs.mdV[VY];
}
else
{
//clip along x +
clip_factor = (region_coord.mV[VX] - region_width) / delta_pos_abs.mdV[VX];
}
}
else if (region_coord.mV[VY] < 0.f)
{
// clip along y -
clip_factor = -(region_coord.mV[VY] / delta_pos_abs.mdV[VY]);
}
else if (region_coord.mV[VY] > region_width)
{
// clip along y +
clip_factor = (region_coord.mV[VY] - region_width) / delta_pos_abs.mdV[VY];
}
// clamp to < 256 to stay in sim
LLVector3d final_region_pos = LLVector3d(region_coord) - (delta_pos * clip_factor);
// clamp x, y to [0,256[ and z to [0,REGION_HEIGHT_METERS] (the clamp function cannot be used here)
if (final_region_pos.mdV[VX] < 0) final_region_pos.mdV[VX] = 0.0;
if (final_region_pos.mdV[VY] < 0) final_region_pos.mdV[VY] = 0.0;
if (final_region_pos.mdV[VZ] < 0) final_region_pos.mdV[VZ] = 0.0;
if (final_region_pos.mdV[VX] > 255.999) final_region_pos.mdV[VX] = 255.999;
if (final_region_pos.mdV[VY] > 255.999) final_region_pos.mdV[VY] = 255.999;
if (final_region_pos.mdV[VZ] > REGION_HEIGHT_METERS) final_region_pos.mdV[VZ] = REGION_HEIGHT_METERS;
//final_region_pos.clamp(0.0, 255.999);
return regionp->getPosGlobalFromRegion(LLVector3(final_region_pos));
}
