mirror of
https://github.com/SoftFever/OrcaSlicer.git
synced 2025-10-24 01:01:15 -06:00
2ae2672ee9
Fixing dep build script on Windows and removing some warnings. Use bundled igl by default. Not building with the dependency scripts if not explicitly stated. This way, it will stay in Fix the libigl patch to include C source files in header only mode.
117 lines
3.4 KiB
C++
117 lines
3.4 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
|
|
//
|
|
// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
|
|
//
|
|
// This Source Code Form is subject to the terms of the Mozilla Public License
|
|
// v. 2.0. If a copy of the MPL was not distributed with this file, You can
|
|
// obtain one at http://mozilla.org/MPL/2.0/.
|
|
#include "snap_to_canonical_view_quat.h"
|
|
|
|
#include "canonical_quaternions.h"
|
|
#include "normalize_quat.h"
|
|
|
|
#include <cstdio>
|
|
#include <cassert>
|
|
|
|
// Note: For the canonical view quaternions it should be completely possible to
|
|
// determine this anaylitcally. That is the max_distance should be a
|
|
// theoretical known value
|
|
// Also: I'm not sure it matters in this case, but. We are dealing with
|
|
// quaternions on the 4d unit sphere, but measuring distance in general 4d
|
|
// space (i.e. not geodesics on the sphere). Probably something with angles
|
|
// would be better.
|
|
template <typename Q_type>
|
|
IGL_INLINE bool igl::snap_to_canonical_view_quat(
|
|
const Q_type* q,
|
|
const Q_type threshold,
|
|
Q_type* s)
|
|
{
|
|
// Copy input into output
|
|
// CANNOT use std::copy here according to:
|
|
// http://www.cplusplus.com/reference/algorithm/copy/
|
|
s[0] = q[0];
|
|
s[1] = q[1];
|
|
s[2] = q[2];
|
|
s[3] = q[3];
|
|
|
|
// Normalize input quaternion
|
|
Q_type qn[4];
|
|
bool valid_len =
|
|
igl::normalize_quat(q,qn);
|
|
// If normalizing valid then don't bother
|
|
if(!valid_len)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
// 0.290019
|
|
const Q_type MAX_DISTANCE = 0.4;
|
|
Q_type min_distance = 2*MAX_DISTANCE;
|
|
int min_index = -1;
|
|
double min_sign = 0;
|
|
// loop over canonical view quaternions
|
|
for(double sign = -1;sign<=1;sign+=2)
|
|
{
|
|
for(int i = 0; i<NUM_CANONICAL_VIEW_QUAT; i++)
|
|
{
|
|
Q_type distance = 0.0;
|
|
// loop over coordinates
|
|
for(int j = 0;j<4;j++)
|
|
{
|
|
// Double cast because of bug in llvm version 4.2 with -O3
|
|
distance +=
|
|
(qn[j]-sign*igl::CANONICAL_VIEW_QUAT<Q_type>(i,j))*
|
|
(qn[j]-sign*igl::CANONICAL_VIEW_QUAT<Q_type>(i,j));
|
|
}
|
|
if(min_distance > distance)
|
|
{
|
|
min_distance = distance;
|
|
min_index = i;
|
|
min_sign = sign;
|
|
}
|
|
}
|
|
}
|
|
|
|
if(MAX_DISTANCE < min_distance)
|
|
{
|
|
fprintf(
|
|
stderr,
|
|
"ERROR: found new max MIN_DISTANCE: %g\n"
|
|
"PLEASE update snap_to_canonical_quat()",
|
|
min_distance);
|
|
}
|
|
|
|
assert(min_distance < MAX_DISTANCE);
|
|
assert(min_index >= 0);
|
|
|
|
if( min_distance/MAX_DISTANCE <= threshold)
|
|
{
|
|
// loop over coordinates
|
|
for(int j = 0;j<4;j++)
|
|
{
|
|
s[j] = min_sign*igl::CANONICAL_VIEW_QUAT<Q_type>(min_index,j);
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
template <typename Scalarq, typename Scalars>
|
|
IGL_INLINE bool igl::snap_to_canonical_view_quat(
|
|
const Eigen::Quaternion<Scalarq> & q,
|
|
const double threshold,
|
|
Eigen::Quaternion<Scalars> & s)
|
|
{
|
|
return snap_to_canonical_view_quat<Scalars>(
|
|
q.coeffs().data(),threshold,s.coeffs().data());
|
|
}
|
|
|
|
#ifdef IGL_STATIC_LIBRARY
|
|
// Explicit template instantiation
|
|
// generated by autoexplicit.sh
|
|
template bool igl::snap_to_canonical_view_quat<double>(const double*, double, double*);
|
|
// generated by autoexplicit.sh
|
|
template bool igl::snap_to_canonical_view_quat<float>(const float*, float, float*);
|
|
template bool igl::snap_to_canonical_view_quat<float, float>(Eigen::Quaternion<float, 0> const&, double, Eigen::Quaternion<float, 0>&);
|
|
template bool igl::snap_to_canonical_view_quat<double, double>(Eigen::Quaternion<double, 0> const&, double, Eigen::Quaternion<double, 0>&);
|
|
#endif
|