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Rewrote the OpenGL object rendering to indexed triangle / quad sets

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for lower memory consumption.
Rewrote the print path 3D preview to generate these indexed triangle / quad
sets, possibly with at least as possible duplication of vertices,
with a crease angle of 45 degrees, leading to maximum 8% overshoots
at the corners.
This commit is contained in:
bubnikv 2017-03-15 16:33:25 +01:00
parent e7a920fe16
commit d18e10c7c9
6 changed files with 414 additions and 566 deletions
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42
xs/src/libslic3r/Geometry.hpp
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@ -13,6 +13,48 @@ using boost::polygon::voronoi_diagram;
namespace Slic3r { namespace Geometry {
inline bool ray_ray_intersection(const Pointf &p1, const Vectorf &v1, const Pointf &p2, const Vectorf &v2, Pointf &res)
{
double denom = v1.x * v2.y - v2.x * v1.y;
if (std::abs(denom) < EPSILON)
return false;
double t = (v2.x * (p1.y - p2.y) - v2.y * (p1.x - p2.x)) / denom;
res.x = p1.x + t * v1.x;
res.y = p1.y + t * v1.y;
return true;
}
inline bool segment_segment_intersection(const Pointf &p1, const Vectorf &v1, const Pointf &p2, const Vectorf &v2, Pointf &res)
{
double denom = v1.x * v2.y - v2.x * v1.y;
if (std::abs(denom) < EPSILON)
// Lines are collinear.
return false;
double s12_x = p1.x - p2.x;
double s12_y = p1.y - p2.y;
double s_numer = v1.x * s12_y - v1.y * s12_x;
bool denom_is_positive = false;
if (denom < 0.) {
denom_is_positive = true;
denom = - denom;
s_numer = - s_numer;
}
if (s_numer < 0.)
// Intersection outside of the 1st segment.
return false;
double t_numer = v2.x * s12_y - v2.y * s12_x;
if (! denom_is_positive)
t_numer = - t_numer;
if (t_numer < 0. || s_numer > denom || t_numer > denom)
// Intersection outside of the 1st or 2nd segment.
return false;
// Intersection inside both of the segments.
double t = t_numer / denom;
res.x = p1.x + t * v1.x;
res.y = p1.y + t * v1.y;
return true;
}
Polygon convex_hull(Points points);
Polygon convex_hull(const Polygons &polygons);
void chained_path(const Points &points, std::vector<Points::size_type> &retval, Point start_near);