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PrusaSlicer-NonPlainar/xs/src/slic3r/GUI/GLGizmo.cpp

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#include "GLGizmo.hpp"
#include "../../libslic3r/Utils.hpp"
#include "../../libslic3r/BoundingBox.hpp"
#include "../../libslic3r/Model.hpp"
#include "../../libslic3r/Geometry.hpp"
#include <GL/glew.h>
#include <iostream>
#include <numeric>
namespace Slic3r {
namespace GUI {
const float GLGizmoBase::Grabber::HalfSize = 2.0f;
const float GLGizmoBase::Grabber::HoverOffset = 0.5f;
const float GLGizmoBase::BaseColor[3] = { 1.0f, 1.0f, 1.0f };
const float GLGizmoBase::HighlightColor[3] = { 1.0f, 0.38f, 0.0f };
GLGizmoBase::Grabber::Grabber()
: center(Pointf(0.0, 0.0))
, angle_z(0.0f)
{
color[0] = 1.0f;
color[1] = 1.0f;
color[2] = 1.0f;
}
void GLGizmoBase::Grabber::render(bool hover) const
{
float min_x = -HalfSize;
float max_x = +HalfSize;
float min_y = -HalfSize;
float max_y = +HalfSize;
::glColor3f((GLfloat)color[0], (GLfloat)color[1], (GLfloat)color[2]);
float angle_z_in_deg = angle_z * 180.0f / (float)PI;
::glPushMatrix();
::glTranslatef((GLfloat)center.x, (GLfloat)center.y, 0.0f);
::glRotatef((GLfloat)angle_z_in_deg, 0.0f, 0.0f, 1.0f);
::glDisable(GL_CULL_FACE);
::glBegin(GL_TRIANGLES);
::glVertex3f((GLfloat)min_x, (GLfloat)min_y, 0.0f);
::glVertex3f((GLfloat)max_x, (GLfloat)min_y, 0.0f);
::glVertex3f((GLfloat)max_x, (GLfloat)max_y, 0.0f);
::glVertex3f((GLfloat)max_x, (GLfloat)max_y, 0.0f);
::glVertex3f((GLfloat)min_x, (GLfloat)max_y, 0.0f);
::glVertex3f((GLfloat)min_x, (GLfloat)min_y, 0.0f);
::glEnd();
::glEnable(GL_CULL_FACE);
if (hover)
{
min_x -= HoverOffset;
max_x += HoverOffset;
min_y -= HoverOffset;
max_y += HoverOffset;
::glBegin(GL_LINE_LOOP);
::glVertex3f((GLfloat)min_x, (GLfloat)min_y, 0.0f);
::glVertex3f((GLfloat)max_x, (GLfloat)min_y, 0.0f);
::glVertex3f((GLfloat)max_x, (GLfloat)max_y, 0.0f);
::glVertex3f((GLfloat)min_x, (GLfloat)max_y, 0.0f);
::glEnd();
}
::glPopMatrix();
}
GLGizmoBase::GLGizmoBase()
: m_state(Off)
, m_hover_id(-1)
{
}
GLGizmoBase::~GLGizmoBase()
{
}
bool GLGizmoBase::init()
{
return on_init();
}
GLGizmoBase::EState GLGizmoBase::get_state() const
{
return m_state;
}
void GLGizmoBase::set_state(GLGizmoBase::EState state)
{
m_state = state;
on_set_state();
}
unsigned int GLGizmoBase::get_texture_id() const
{
return m_textures[m_state].get_id();
}
int GLGizmoBase::get_textures_size() const
{
return m_textures[Off].get_width();
}
int GLGizmoBase::get_hover_id() const
{
return m_hover_id;
}
void GLGizmoBase::set_hover_id(int id)
{
//if (id < (int)m_grabbers.size())
m_hover_id = id;
}
void GLGizmoBase::start_dragging()
{
on_start_dragging();
}
void GLGizmoBase::stop_dragging()
{
on_stop_dragging();
}
void GLGizmoBase::update(const Pointf& mouse_pos)
{
if (m_hover_id != -1)
on_update(mouse_pos);
}
void GLGizmoBase::refresh()
{
on_refresh();
}
void GLGizmoBase::render(const BoundingBoxf3& box) const
{
on_render(box);
}
void GLGizmoBase::render_for_picking(const BoundingBoxf3& box) const
{
on_render_for_picking(box);
}
void GLGizmoBase::on_set_state()
{
// do nothing
}
void GLGizmoBase::on_start_dragging()
{
// do nothing
}
void GLGizmoBase::on_stop_dragging()
{
// do nothing
}
void GLGizmoBase::on_refresh()
{
// do nothing
}
void GLGizmoBase::render_grabbers() const
{
for (int i = 0; i < (int)m_grabbers.size(); ++i)
{
m_grabbers[i].render(m_hover_id == i);
}
}
const float GLGizmoRotate::Offset = 5.0f;
const unsigned int GLGizmoRotate::CircleResolution = 64;
const unsigned int GLGizmoRotate::AngleResolution = 64;
const unsigned int GLGizmoRotate::ScaleStepsCount = 60;
const float GLGizmoRotate::ScaleStepRad = 2.0f * (float)PI / GLGizmoRotate::ScaleStepsCount;
const unsigned int GLGizmoRotate::ScaleLongEvery = 5;
const float GLGizmoRotate::ScaleLongTooth = 2.0f;
const float GLGizmoRotate::ScaleShortTooth = 1.0f;
const unsigned int GLGizmoRotate::SnapRegionsCount = 8;
const float GLGizmoRotate::GrabberOffset = 5.0f;
GLGizmoRotate::GLGizmoRotate()
: GLGizmoBase()
, m_angle_z(0.0f)
, m_center(Pointf(0.0, 0.0))
, m_radius(0.0f)
, m_keep_initial_values(false)
{
}
float GLGizmoRotate::get_angle_z() const
{
return m_angle_z;
}
void GLGizmoRotate::set_angle_z(float angle_z)
{
if (std::abs(angle_z - 2.0f * PI) < EPSILON)
angle_z = 0.0f;
m_angle_z = angle_z;
}
bool GLGizmoRotate::on_init()
{
std::string path = resources_dir() + "/icons/overlay/";
std::string filename = path + "rotate_off.png";
if (!m_textures[Off].load_from_file(filename, false))
return false;
filename = path + "rotate_hover.png";
if (!m_textures[Hover].load_from_file(filename, false))
return false;
filename = path + "rotate_on.png";
if (!m_textures[On].load_from_file(filename, false))
return false;
m_grabbers.push_back(Grabber());
return true;
}
void GLGizmoRotate::on_set_state()
{
m_keep_initial_values = (m_state == On) ? false : true;
}
void GLGizmoRotate::on_update(const Pointf& mouse_pos)
{
Vectorf orig_dir(1.0, 0.0);
Vectorf new_dir = normalize(mouse_pos - m_center);
coordf_t theta = ::acos(clamp(-1.0, 1.0, dot(new_dir, orig_dir)));
if (cross(orig_dir, new_dir) < 0.0)
theta = 2.0 * (coordf_t)PI - theta;
// snap
if (length(m_center.vector_to(mouse_pos)) < 2.0 * (double)m_radius / 3.0)
{
coordf_t step = 2.0 * (coordf_t)PI / (coordf_t)SnapRegionsCount;
theta = step * (coordf_t)std::round(theta / step);
}
if (theta == 2.0 * (coordf_t)PI)
theta = 0.0;
m_angle_z = (float)theta;
}
void GLGizmoRotate::on_refresh()
{
m_keep_initial_values = false;
}
void GLGizmoRotate::on_render(const BoundingBoxf3& box) const
{
::glDisable(GL_DEPTH_TEST);
if (!m_keep_initial_values)
{
const Pointf3& size = box.size();
m_center = box.center();
m_radius = Offset + ::sqrt(sqr(0.5f * size.x) + sqr(0.5f * size.y));
m_keep_initial_values = true;
}
::glLineWidth(2.0f);
::glColor3fv(BaseColor);
_render_circle();
_render_scale();
_render_snap_radii();
_render_reference_radius();
::glColor3fv(HighlightColor);
_render_angle_z();
_render_grabber();
}
void GLGizmoRotate::on_render_for_picking(const BoundingBoxf3& box) const
{
::glDisable(GL_DEPTH_TEST);
m_grabbers[0].color[0] = 1.0f;
m_grabbers[0].color[1] = 1.0f;
m_grabbers[0].color[2] = 254.0f / 255.0f;
render_grabbers();
}
void GLGizmoRotate::_render_circle() const
{
::glBegin(GL_LINE_LOOP);
for (unsigned int i = 0; i < ScaleStepsCount; ++i)
{
float angle = (float)i * ScaleStepRad;
float x = m_center.x + ::cos(angle) * m_radius;
float y = m_center.y + ::sin(angle) * m_radius;
::glVertex3f((GLfloat)x, (GLfloat)y, 0.0f);
}
::glEnd();
}
void GLGizmoRotate::_render_scale() const
{
float out_radius_long = m_radius + ScaleLongTooth;
float out_radius_short = m_radius + ScaleShortTooth;
::glBegin(GL_LINES);
for (unsigned int i = 0; i < ScaleStepsCount; ++i)
{
float angle = (float)i * ScaleStepRad;
float cosa = ::cos(angle);
float sina = ::sin(angle);
float in_x = m_center.x + cosa * m_radius;
float in_y = m_center.y + sina * m_radius;
float out_x = (i % ScaleLongEvery == 0) ? m_center.x + cosa * out_radius_long : m_center.x + cosa * out_radius_short;
float out_y = (i % ScaleLongEvery == 0) ? m_center.y + sina * out_radius_long : m_center.y + sina * out_radius_short;
::glVertex3f((GLfloat)in_x, (GLfloat)in_y, 0.0f);
::glVertex3f((GLfloat)out_x, (GLfloat)out_y, 0.0f);
}
::glEnd();
}
void GLGizmoRotate::_render_snap_radii() const
{
float step = 2.0f * (float)PI / (float)SnapRegionsCount;
float in_radius = m_radius / 3.0f;
float out_radius = 2.0f * in_radius;
::glBegin(GL_LINES);
for (unsigned int i = 0; i < SnapRegionsCount; ++i)
{
float angle = (float)i * step;
float cosa = ::cos(angle);
float sina = ::sin(angle);
float in_x = m_center.x + cosa * in_radius;
float in_y = m_center.y + sina * in_radius;
float out_x = m_center.x + cosa * out_radius;
float out_y = m_center.y + sina * out_radius;
::glVertex3f((GLfloat)in_x, (GLfloat)in_y, 0.0f);
::glVertex3f((GLfloat)out_x, (GLfloat)out_y, 0.0f);
}
::glEnd();
}
void GLGizmoRotate::_render_reference_radius() const
{
::glBegin(GL_LINES);
::glVertex3f((GLfloat)m_center.x, (GLfloat)m_center.y, 0.0f);
::glVertex3f((GLfloat)m_center.x + m_radius + GrabberOffset, (GLfloat)m_center.y, 0.0f);
::glEnd();
}
void GLGizmoRotate::_render_angle_z() const
{
float step_angle = m_angle_z / AngleResolution;
float ex_radius = m_radius + GrabberOffset;
::glBegin(GL_LINE_STRIP);
for (unsigned int i = 0; i <= AngleResolution; ++i)
{
float angle = (float)i * step_angle;
float x = m_center.x + ::cos(angle) * ex_radius;
float y = m_center.y + ::sin(angle) * ex_radius;
::glVertex3f((GLfloat)x, (GLfloat)y, 0.0f);
}
::glEnd();
}
void GLGizmoRotate::_render_grabber() const
{
float grabber_radius = m_radius + GrabberOffset;
m_grabbers[0].center.x = m_center.x + ::cos(m_angle_z) * grabber_radius;
m_grabbers[0].center.y = m_center.y + ::sin(m_angle_z) * grabber_radius;
m_grabbers[0].angle_z = m_angle_z;
::glColor3fv(BaseColor);
::glBegin(GL_LINES);
::glVertex3f((GLfloat)m_center.x, (GLfloat)m_center.y, 0.0f);
::glVertex3f((GLfloat)m_grabbers[0].center.x, (GLfloat)m_grabbers[0].center.y, 0.0f);
::glEnd();
::memcpy((void*)m_grabbers[0].color, (const void*)HighlightColor, 3 * sizeof(float));
render_grabbers();
}
const float GLGizmoScale::Offset = 5.0f;
GLGizmoScale::GLGizmoScale()
: GLGizmoBase()
, m_scale(1.0f)
, m_starting_scale(1.0f)
{
}
float GLGizmoScale::get_scale() const
{
return m_scale;
}
void GLGizmoScale::set_scale(float scale)
{
m_starting_scale = scale;
}
bool GLGizmoScale::on_init()
{
std::string path = resources_dir() + "/icons/overlay/";
std::string filename = path + "scale_off.png";
if (!m_textures[Off].load_from_file(filename, false))
return false;
filename = path + "scale_hover.png";
if (!m_textures[Hover].load_from_file(filename, false))
return false;
filename = path + "scale_on.png";
if (!m_textures[On].load_from_file(filename, false))
return false;
for (unsigned int i = 0; i < 4; ++i)
{
m_grabbers.push_back(Grabber());
}
return true;
}
void GLGizmoScale::on_start_dragging()
{
if (m_hover_id != -1)
m_starting_drag_position = m_grabbers[m_hover_id].center;
}
void GLGizmoScale::on_update(const Pointf& mouse_pos)
{
Pointf center(0.5 * (m_grabbers[1].center.x + m_grabbers[0].center.x), 0.5 * (m_grabbers[3].center.y + m_grabbers[0].center.y));
coordf_t orig_len = length(m_starting_drag_position - center);
coordf_t new_len = length(mouse_pos - center);
coordf_t ratio = (orig_len != 0.0) ? new_len / orig_len : 1.0;
m_scale = m_starting_scale * (float)ratio;
}
void GLGizmoScale::on_render(const BoundingBoxf3& box) const
{
::glDisable(GL_DEPTH_TEST);
coordf_t min_x = box.min.x - (coordf_t)Offset;
coordf_t max_x = box.max.x + (coordf_t)Offset;
coordf_t min_y = box.min.y - (coordf_t)Offset;
coordf_t max_y = box.max.y + (coordf_t)Offset;
m_grabbers[0].center.x = min_x;
m_grabbers[0].center.y = min_y;
m_grabbers[1].center.x = max_x;
m_grabbers[1].center.y = min_y;
m_grabbers[2].center.x = max_x;
m_grabbers[2].center.y = max_y;
m_grabbers[3].center.x = min_x;
m_grabbers[3].center.y = max_y;
::glLineWidth(2.0f);
::glColor3fv(BaseColor);
// draw outline
::glBegin(GL_LINE_LOOP);
for (unsigned int i = 0; i < 4; ++i)
{
::glVertex3f((GLfloat)m_grabbers[i].center.x, (GLfloat)m_grabbers[i].center.y, 0.0f);
}
::glEnd();
// draw grabbers
for (unsigned int i = 0; i < 4; ++i)
{
::memcpy((void*)m_grabbers[i].color, (const void*)HighlightColor, 3 * sizeof(float));
}
render_grabbers();
}
void GLGizmoScale::on_render_for_picking(const BoundingBoxf3& box) const
{
static const GLfloat INV_255 = 1.0f / 255.0f;
::glDisable(GL_DEPTH_TEST);
for (unsigned int i = 0; i < 4; ++i)
{
m_grabbers[i].color[0] = 1.0f;
m_grabbers[i].color[1] = 1.0f;
m_grabbers[i].color[2] = (254.0f - (float)i) * INV_255;
}
render_grabbers();
}
GLGizmoFlatten::GLGizmoFlatten()
: GLGizmoBase(),
m_normal(Pointf3(0.f, 0.f, 0.f))
{}
bool GLGizmoFlatten::on_init()
{
std::string path = resources_dir() + "/icons/overlay/";
std::string filename = path + "layflat_off.png";
if (!m_textures[Off].load_from_file(filename, false))
return false;
filename = path + "layflat_hover.png";
if (!m_textures[Hover].load_from_file(filename, false))
return false;
filename = path + "layflat_on.png";
if (!m_textures[On].load_from_file(filename, false))
return false;
return true;
}
void GLGizmoFlatten::on_start_dragging()
{
if (m_hover_id != -1)
m_normal = m_planes[m_hover_id].normal;
}
void GLGizmoFlatten::on_render(const BoundingBoxf3& box) const
{
// the dragged_offset is a vector measuring where was the object moved
// with the gizmo being on. This is reset in set_flattening_data and
// does not work correctly when there are multiple copies.
if (!m_center) // this is the first bounding box that we see
m_center.reset(new Pointf3(box.center().x, box.center().y));
Pointf3 dragged_offset = box.center() - *m_center;
bool blending_was_enabled = ::glIsEnabled(GL_BLEND);
bool depth_test_was_enabled = ::glIsEnabled(GL_DEPTH_TEST);
::glEnable(GL_BLEND);
::glEnable(GL_DEPTH_TEST);
for (int i=0; i<(int)m_planes.size(); ++i) {
if (i == m_hover_id)
::glColor4f(0.9f, 0.9f, 0.9f, 0.75f);
else
::glColor4f(0.9f, 0.9f, 0.9f, 0.5f);
for (Pointf offset : m_instances_positions) {
offset += dragged_offset;
::glBegin(GL_POLYGON);
for (const auto& vertex : m_planes[i].vertices)
::glVertex3f((GLfloat)vertex.x + offset.x, (GLfloat)vertex.y + offset.y, (GLfloat)vertex.z);
::glEnd();
}
}
if (!blending_was_enabled)
::glDisable(GL_BLEND);
if (!depth_test_was_enabled)
::glDisable(GL_DEPTH_TEST);
}
void GLGizmoFlatten::on_render_for_picking(const BoundingBoxf3& box) const
{
static const GLfloat INV_255 = 1.0f / 255.0f;
::glDisable(GL_DEPTH_TEST);
for (unsigned int i = 0; i < m_planes.size(); ++i)
{
::glColor3f(1.f, 1.f, (254.0f - (float)i) * INV_255);
for (const Pointf& offset : m_instances_positions) {
::glBegin(GL_POLYGON);
for (const auto& vertex : m_planes[i].vertices)
::glVertex3f((GLfloat)vertex.x + offset.x, (GLfloat)vertex.y + offset.y, (GLfloat)vertex.z);
::glEnd();
}
}
}
// TODO - remove and use Eigen instead
static Pointf3 super_rotation(Pointf3 axis, float angle, const Pointf3& point)
{
axis = normalize(axis);
const float& x = axis.x;
const float& y = axis.y;
const float& z = axis.z;
float s = sin(angle);
float c = cos(angle);
float D = 1-c;
float matrix[3][3] = { { c + x*x*D, x*y*D-z*s, x*z*D+y*s },
{ y*x*D+z*s, c+y*y*D, y*z*D-x*s },
{ z*x*D-y*s, z*y*D+x*s, c+z*z*D } };
float in[3] = { (float)point.x, (float)point.y, (float)point.z };
float out[3] = { 0, 0, 0 };
for (unsigned char i=0; i<3; ++i)
for (unsigned char j=0; j<3; ++j)
out[i] += matrix[i][j] * in[j];
return Pointf3(out[0], out[1], out[2]);
}
void GLGizmoFlatten::set_flattening_data(const ModelObject* model_object)
{
m_center.release(); // object is not being dragged (this would not be called otherwise) - we must forget about the bounding box position...
m_model_object = model_object;
// ...and save the updated positions of the object instances:
if (m_model_object && !m_model_object->instances.empty()) {
m_instances_positions.clear();
for (const auto* instance : m_model_object->instances)
m_instances_positions.emplace_back(instance->offset);
}
if (is_plane_update_necessary())
update_planes();
}
void GLGizmoFlatten::update_planes()
{
TriangleMesh ch;
for (const ModelVolume* vol : m_model_object->volumes)
ch.merge(vol->get_convex_hull());
ch = ch.convex_hull_3d();
ch.scale(m_model_object->instances.front()->scaling_factor);
ch.rotate_z(m_model_object->instances.front()->rotation);
m_planes.clear();
// Now we'll go through all the facets and append Points of facets sharing the same normal:
const int num_of_facets = ch.stl.stats.number_of_facets;
std::vector<int> facet_queue(num_of_facets, 0);
std::vector<bool> facet_visited(num_of_facets, false);
int facet_queue_cnt = 0;
const stl_normal* normal_ptr = nullptr;
while (1) {
// Find next unvisited triangle:
int facet_idx = 0;
for (; facet_idx < num_of_facets; ++ facet_idx)
if (!facet_visited[facet_idx]) {
facet_queue[facet_queue_cnt ++] = facet_idx;
facet_visited[facet_idx] = true;
normal_ptr = &ch.stl.facet_start[facet_idx].normal;
m_planes.emplace_back();
break;
}
if (facet_idx == num_of_facets)
break; // Everything was visited already
while (facet_queue_cnt > 0) {
int facet_idx = facet_queue[-- facet_queue_cnt];
const stl_normal* this_normal_ptr = &ch.stl.facet_start[facet_idx].normal;
//if (this_normal_ptr->x == normal_ptr->x && this_normal_ptr->y == normal_ptr->y && this_normal_ptr->z == normal_ptr->z) {
if (std::abs(this_normal_ptr->x-normal_ptr->x) < 0.001 && std::abs(this_normal_ptr->y-normal_ptr->y) < 0.001 && std::abs(this_normal_ptr->z-normal_ptr->z) < 0.001) {
stl_vertex* first_vertex = ch.stl.facet_start[facet_idx].vertex;
for (int j=0; j<3; ++j)
m_planes.back().vertices.emplace_back(first_vertex[j].x, first_vertex[j].y, first_vertex[j].z);
facet_visited[facet_idx] = true;
for (int j = 0; j < 3; ++ j) {
int neighbor_idx = ch.stl.neighbors_start[facet_idx].neighbor[j];
if (! facet_visited[neighbor_idx])
facet_queue[facet_queue_cnt ++] = neighbor_idx;
}
}
}
m_planes.back().normal = Pointf3(normal_ptr->x, normal_ptr->y, normal_ptr->z);
}
// Now we'll go through all the polygons, transform the points into xy plane to process them:
for (unsigned int polygon_id=0; polygon_id < m_planes.size(); ++polygon_id) {
Pointf3s& polygon = m_planes[polygon_id].vertices;
const Pointf3& normal = m_planes[polygon_id].normal;
// We are going to rotate about z and y to flatten the plane
float angle_z = 0.f;
float angle_y = 0.f;
if (std::abs(normal.y) > 0.001)
angle_z = -atan2(normal.y, normal.x); // angle to rotate so that normal ends up in xz-plane
if (std::abs(normal.x*cos(angle_z)-normal.y*sin(angle_z)) > 0.001)
angle_y = - atan2(normal.x*cos(angle_z)-normal.y*sin(angle_z), normal.z); // angle to rotate to make normal point upwards
else {
// In case it already was in z-direction, we must ensure it is not the wrong way:
angle_y = normal.z > 0.f ? 0 : -M_PI;
}
// Rotate all points to the xy plane:
for (auto& vertex : polygon) {
vertex = super_rotation(Pointf3(0,0,1), angle_z, vertex);
vertex = super_rotation(Pointf3(0,1,0), angle_y, vertex);
}
polygon = Slic3r::Geometry::convex_hull(polygon); // To remove the inner points
// We will calculate area of the polygon and discard ones that are too small
// The limit is more forgiving in case the normal is in the direction of the coordinate axes
const float minimal_area = (std::abs(normal.x) > 0.999f || std::abs(normal.y) > 0.999f || std::abs(normal.z) > 0.999f) ? 1.f : 20.f;
float& area = m_planes[polygon_id].area;
area = 0.f;
for (unsigned int i = 0; i < polygon.size(); i++) // Shoelace formula
area += polygon[i].x*polygon[i+1 < polygon.size() ? i+1 : 0 ].y - polygon[i+1 < polygon.size() ? i+1 : 0].x*polygon[i].y;
area = std::abs(area/2.f);
if (area < minimal_area) {
m_planes.erase(m_planes.begin()+(polygon_id--));
continue;
}
// We will shrink the polygon a little bit so it does not touch the object edges:
Pointf3 centroid = std::accumulate(polygon.begin(), polygon.end(), Pointf3(0.f, 0.f, 0.f));
centroid.scale(1.f/polygon.size());
for (auto& vertex : polygon)
vertex = 0.9f*vertex + 0.1f*centroid;
// Polygon is now simple and convex, we'll round the corners to make them look nicer.
// The algorithm takes a vertex, calculates middles of respective sides and moves the vertex
// towards their average (controlled by 'aggressivity'). This is repeated k times.
// In next iterations, the neighbours are not always taken at the middle (to increase the
// rounding effect at the corners, where we need it most).
const unsigned int k = 10; // number of iterations
const float aggressivity = 0.2f; // agressivity
const unsigned int N = polygon.size();
std::vector<std::pair<unsigned int, unsigned int>> neighbours;
if (k != 0) {
Pointf3s points_out(2*k*N); // vector long enough to store the future vertices
for (unsigned int j=0; j<N; ++j) {
points_out[j*2*k] = polygon[j];
neighbours.push_back(std::make_pair((int)(j*2*k-k) < 0 ? (N-1)*2*k+k : j*2*k-k, j*2*k+k));
}
for (unsigned int i=0; i<k; ++i) {
// Calculate middle of each edge so that neighbours points to something useful:
for (unsigned int j=0; j<N; ++j)
if (i==0)
points_out[j*2*k+k] = 0.5f * (points_out[j*2*k] + points_out[j==N-1 ? 0 : (j+1)*2*k]);
else {
float r = 0.2+0.3/(k-1)*i; // the neighbours are not always taken in the middle
points_out[neighbours[j].first] = r*points_out[j*2*k] + (1-r) * points_out[neighbours[j].first-1];
points_out[neighbours[j].second] = r*points_out[j*2*k] + (1-r) * points_out[neighbours[j].second+1];
}
// Now we have a triangle and valid neighbours, we can do an iteration:
for (unsigned int j=0; j<N; ++j)
points_out[2*k*j] = (1-aggressivity) * points_out[2*k*j] +
aggressivity*0.5f*(points_out[neighbours[j].first] + points_out[neighbours[j].second]);
for (auto& n : neighbours) {
++n.first;
--n.second;
}
}
polygon = points_out; // replace the coarse polygon with the smooth one that we just created
}
// Transform back to 3D;
for (auto& b : polygon) {
b.z += 0.1f; // raise a bit above the object surface to avoid flickering
b = super_rotation(Pointf3(0,1,0), -angle_y, b);
b = super_rotation(Pointf3(0,0,1), -angle_z, b);
}
}
// We'll sort the planes by area and only keep the 255 largest ones (because of the picking pass limitations):
std::sort(m_planes.rbegin(), m_planes.rend(), [](const PlaneData& a, const PlaneData& b) { return a.area < b.area; });
m_planes.resize(std::min((int)m_planes.size(), 255));
// Planes are finished - let's save what we calculated it from:
m_source_data.bounding_boxes.clear();
for (const auto& vol : m_model_object->volumes)
m_source_data.bounding_boxes.push_back(vol->get_convex_hull().bounding_box());
m_source_data.scaling_factor = m_model_object->instances.front()->scaling_factor;
m_source_data.rotation = m_model_object->instances.front()->rotation;
const float* first_vertex = m_model_object->volumes.front()->get_convex_hull().first_vertex();
m_source_data.mesh_first_point = Pointf3(first_vertex[0], first_vertex[1], first_vertex[2]);
}
// Check if the bounding boxes of each volume's convex hull is the same as before
// and that scaling and rotation has not changed. In that case we don't have to recalculate it.
bool GLGizmoFlatten::is_plane_update_necessary() const
{
if (m_state != On || !m_model_object || m_model_object->instances.empty())
return false;
if (m_model_object->volumes.size() != m_source_data.bounding_boxes.size()
|| m_model_object->instances.front()->scaling_factor != m_source_data.scaling_factor
|| m_model_object->instances.front()->rotation != m_source_data.rotation)
return true;
// now compare the bounding boxes:
for (unsigned int i=0; i<m_model_object->volumes.size(); ++i)
if (m_model_object->volumes[i]->get_convex_hull().bounding_box() != m_source_data.bounding_boxes[i])
return true;
const float* first_vertex = m_model_object->volumes.front()->get_convex_hull().first_vertex();
Pointf3 first_point(first_vertex[0], first_vertex[1], first_vertex[2]);
if (first_point != m_source_data.mesh_first_point)
return true;
return false;
}
Pointf3 GLGizmoFlatten::get_flattening_normal() const {
Pointf3 normal = m_normal;
normal.rotate(-m_model_object->instances.front()->rotation);
m_normal = Pointf3(0.f, 0.f, 0.f);
return normal;
}
} // namespace GUI
} // namespace Slic3r
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