void MyFigureGlut::GetBoundingBoxOfPoints(const PointCloud& pts, Cuboid* out)
{
assert(out);
out->min_x = out->min_y = out->min_z = FLT_MAX;
out->max_x = out->max_y = out->max_z = -FLT_MAX;
PointCloud::ConstIterator p = pts.Begin();
while(p != pts.End()) {
if ( p->x < out->min_x ) out->min_x = p->x;
if ( p->y < out->min_y ) out->min_y = p->y;
if ( -p->z < out->min_z ) out->min_z = -p->z;
if ( p->x > out->max_x ) out->max_x = p->x;
if ( p->y > out->max_y ) out->max_y = p->y;
if ( -p->z > out->max_z ) out->max_z = -p->z;
p++;
}
}
//same as SetPoints except for x,y scaling
void MyFigureGlut::SetDepthPoints(PointCloud& pts, int win_width, int win_height)
{
PointCloud::ConstIterator p = pts.Begin();
ColoredPoint temp;
int cnt=0;
float x_full, y_full;
x_full=pts.Max().x - pts.Min().x;
y_full=pts.Max().y - pts.Min().y;
while(p != pts.End())
{
if(p->x != 0)
{
temp.x=(float)(((float(cnt%win_width))*x_full)/win_width) + pts.Min().x;
temp.y=(float)(((float(cnt/win_width))*y_full)/win_height) + pts.Min().y;
temp.z=(*p).z;
temp.color=(*p).color;
m_pts.Add(temp);
}
p++;
cnt++;
}
// back up viewpoint so we can see points
{
Cuboid box;
GetBoundingBoxOfPoints(pts, &box);
if(auto_adjust) {
float zmax = box.max_z;
// if zmax is too small, the object cannot be displayed.(?????)
if ( zmax > 0 && zmax < 1) zmax += 1; //zmax could be zero.
if ( zmax == 0) zmax += 1.5;
SetTranslation(0, 0, -zmax);
}
}
}