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#include "GLSelectionRectangle.hpp"
#include "Camera.hpp"
#include "3DScene.hpp"
#include "GLCanvas3D.hpp"
#include "GUI_App.hpp"
#include "Plater.hpp"
#include <igl/project.h>
#include <GL/glew.h>
namespace Slic3r {
namespace GUI {
void GLSelectionRectangle::start_dragging(const Vec2d& mouse_position, EState state)
{
if (is_dragging() || state == EState::Off)
return;
m_state = state;
m_start_corner = mouse_position;
m_end_corner = mouse_position;
}
void GLSelectionRectangle::dragging(const Vec2d& mouse_position)
{
if (!is_dragging())
return;
m_end_corner = mouse_position;
}
std::vector<unsigned int> GLSelectionRectangle::stop_dragging(const GLCanvas3D& canvas, const std::vector<Vec3d>& points)
{
std::vector<unsigned int> out;
if (!is_dragging())
return out;
m_state = EState::Off;
const Camera& camera = wxGetApp().plater()->get_camera();
Matrix4d modelview = camera.get_view_matrix().matrix();
Matrix4d projection= camera.get_projection_matrix().matrix();
Vec4i viewport(camera.get_viewport().data());
// Convert our std::vector to Eigen dynamic matrix.
Eigen::Matrix<double, Eigen::Dynamic, 3, Eigen::DontAlign> pts(points.size(), 3);
for (size_t i=0; i<points.size(); ++i)
pts.block<1, 3>(i, 0) = points[i];
// Get the projections.
Eigen::Matrix<double, Eigen::Dynamic, 3, Eigen::DontAlign> projections;
igl::project(pts, modelview, projection, viewport, projections);
// bounding box created from the rectangle corners - will take care of order of the corners
BoundingBox rectangle(Points{ Point(m_start_corner.cast<coord_t>()), Point(m_end_corner.cast<coord_t>()) });
// Iterate over all points and determine whether they're in the rectangle.
for (int i = 0; i<projections.rows(); ++i)
if (rectangle.contains(Point(projections(i, 0), canvas.get_canvas_size().get_height() - projections(i, 1))))
out.push_back(i);
return out;
}
void GLSelectionRectangle::stop_dragging()
{
if (is_dragging())
m_state = EState::Off;
}
void GLSelectionRectangle::render(const GLCanvas3D& canvas)
{
if (!is_dragging())
return;
const Size cnv_size = canvas.get_canvas_size();
#if ENABLE_GL_SHADERS_ATTRIBUTES
const float cnv_width = (float)cnv_size.get_width();
const float cnv_height = (float)cnv_size.get_height();
if (cnv_width == 0.0f || cnv_height == 0.0f)
return;
const float cnv_inv_width = 1.0f / cnv_width;
const float cnv_inv_height = 1.0f / cnv_height;
const float left = 2.0f * (get_left() * cnv_inv_width - 0.5f);
const float right = 2.0f * (get_right() * cnv_inv_width - 0.5f);
const float top = -2.0f * (get_top() * cnv_inv_height - 0.5f);
const float bottom = -2.0f * (get_bottom() * cnv_inv_height - 0.5f);
#else
const Camera& camera = wxGetApp().plater()->get_camera();
const float inv_zoom = (float)camera.get_inv_zoom();
const float cnv_half_width = 0.5f * (float)cnv_size.get_width();
const float cnv_half_height = 0.5f * (float)cnv_size.get_height();
if (cnv_half_width == 0.0f || cnv_half_height == 0.0f)
return;
const Vec2d start(m_start_corner.x() - cnv_half_width, cnv_half_height - m_start_corner.y());
const Vec2d end(m_end_corner.x() - cnv_half_width, cnv_half_height - m_end_corner.y());
const float left = (float)std::min(start.x(), end.x()) * inv_zoom;
const float top = (float)std::max(start.y(), end.y()) * inv_zoom;
const float right = (float)std::max(start.x(), end.x()) * inv_zoom;
const float bottom = (float)std::min(start.y(), end.y()) * inv_zoom;
#endif // ENABLE_GL_SHADERS_ATTRIBUTES
glsafe(::glLineWidth(1.5f));
#if !ENABLE_LEGACY_OPENGL_REMOVAL
float color[3];
color[0] = (m_state == EState::Select) ? 0.3f : 1.0f;
color[1] = (m_state == EState::Select) ? 1.0f : 0.3f;
color[2] = 0.3f;
glsafe(::glColor3fv(color));
#endif // !ENABLE_LEGACY_OPENGL_REMOVAL
glsafe(::glDisable(GL_DEPTH_TEST));
#if !ENABLE_GL_SHADERS_ATTRIBUTES
glsafe(::glPushMatrix());
glsafe(::glLoadIdentity());
// ensure that the rectangle is renderered inside the frustrum
glsafe(::glTranslated(0.0, 0.0, -(camera.get_near_z() + 0.5)));
// ensure that the overlay fits the frustrum near z plane
const double gui_scale = camera.get_gui_scale();
glsafe(::glScaled(gui_scale, gui_scale, 1.0));
#endif // !ENABLE_GL_SHADERS_ATTRIBUTES
glsafe(::glPushAttrib(GL_ENABLE_BIT));
glsafe(::glLineStipple(4, 0xAAAA));
glsafe(::glEnable(GL_LINE_STIPPLE));
#if ENABLE_LEGACY_OPENGL_REMOVAL
GLShaderProgram* shader = wxGetApp().get_shader("flat");
if (shader != nullptr) {
shader->start_using();
if (!m_rectangle.is_initialized() || !m_old_start_corner.isApprox(m_start_corner) || !m_old_end_corner.isApprox(m_end_corner)) {
m_old_start_corner = m_start_corner;
m_old_end_corner = m_end_corner;
m_rectangle.reset();
GLModel::Geometry init_data;
init_data.format = { GLModel::Geometry::EPrimitiveType::LineLoop, GLModel::Geometry::EVertexLayout::P2 };
init_data.reserve_vertices(4);
init_data.reserve_indices(4);
// vertices
init_data.add_vertex(Vec2f(left, bottom));
init_data.add_vertex(Vec2f(right, bottom));
init_data.add_vertex(Vec2f(right, top));
init_data.add_vertex(Vec2f(left, top));
// indices
init_data.add_index(0);
init_data.add_index(1);
init_data.add_index(2);
init_data.add_index(3);
m_rectangle.init_from(std::move(init_data));
}
#if ENABLE_GL_SHADERS_ATTRIBUTES
shader->set_uniform("view_model_matrix", Transform3d::Identity());
shader->set_uniform("projection_matrix", Transform3d::Identity());
#endif // ENABLE_GL_SHADERS_ATTRIBUTES
m_rectangle.set_color(ColorRGBA((m_state == EState::Select) ? 0.3f : 1.0f, (m_state == EState::Select) ? 1.0f : 0.3f, 0.3f, 1.0f));
m_rectangle.render();
shader->stop_using();
}
#else
::glBegin(GL_LINE_LOOP);
::glVertex2f((GLfloat)left, (GLfloat)bottom);
::glVertex2f((GLfloat)right, (GLfloat)bottom);
::glVertex2f((GLfloat)right, (GLfloat)top);
::glVertex2f((GLfloat)left, (GLfloat)top);
glsafe(::glEnd());
#endif // ENABLE_LEGACY_OPENGL_REMOVAL
glsafe(::glPopAttrib());
#if !ENABLE_GL_SHADERS_ATTRIBUTES
glsafe(::glPopMatrix());
#endif // !ENABLE_GL_SHADERS_ATTRIBUTES
}
} // namespace GUI
} // namespace Slic3r
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