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#include "GLSelectionRectangle.hpp"
#include "Camera.hpp"
#include "3DScene.hpp"
#include "GLCanvas3D.hpp"
#include <GL/glew.h>
namespace Slic3r {
namespace GUI {
void GLSelectionRectangle::start_dragging(const Vec2d& mouse_position, EState state)
{
if (is_dragging() || (state == 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 = Off;
const Camera& camera = canvas.get_camera();
const std::array<int, 4>& viewport = camera.get_viewport();
const Transform3d& modelview_matrix = camera.get_view_matrix();
const Transform3d& projection_matrix = camera.get_projection_matrix();
// bounding box created from the rectangle corners - will take care of order of the corners
BoundingBox rectangle(Points{ Point(m_start_corner.cast<int>()), Point(m_end_corner.cast<int>()) });
// Iterate over all points and determine whether they're in the rectangle.
for (unsigned int i = 0; i<points.size(); ++i) {
const Vec3d& point = points[i];
GLdouble out_x, out_y, out_z;
::gluProject((GLdouble)point(0), (GLdouble)point(1), (GLdouble)point(2), (GLdouble*)modelview_matrix.data(), (GLdouble*)projection_matrix.data(), (GLint*)viewport.data(), &out_x, &out_y, &out_z);
out_y = canvas.get_canvas_size().get_height() - out_y;
if (rectangle.contains(Point(out_x, out_y)))
out.push_back(i);
}
return out;
}
void GLSelectionRectangle::stop_dragging()
{
if (is_dragging())
m_state = Off;
}
void GLSelectionRectangle::render(const GLCanvas3D& canvas) const
{
if (!is_dragging())
return;
const Camera& camera = canvas.get_camera();
float inv_zoom = (float)camera.get_inv_zoom();
Size cnv_size = canvas.get_canvas_size();
float cnv_half_width = 0.5f * (float)cnv_size.get_width();
float cnv_half_height = 0.5f * (float)cnv_size.get_height();
if ((cnv_half_width == 0.0f) || (cnv_half_height == 0.0f))
return;
Vec2d start(m_start_corner(0) - cnv_half_width, cnv_half_height - m_start_corner(1));
Vec2d end(m_end_corner(0) - cnv_half_width, cnv_half_height - m_end_corner(1));
float left = (float)std::min(start(0), end(0)) * inv_zoom;
float top = (float)std::max(start(1), end(1)) * inv_zoom;
float right = (float)std::max(start(0), end(0)) * inv_zoom;
float bottom = (float)std::min(start(1), end(1)) * inv_zoom;
glsafe(::glLineWidth(1.5f));
float color[3];
color[0] = (m_state == Select) ? 0.3f : 1.0f;
color[1] = (m_state == Select) ? 1.0f : 0.3f;
color[2] = 0.3f;
glsafe(::glColor3fv(color));
glsafe(::glDisable(GL_DEPTH_TEST));
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
double gui_scale = camera.get_gui_scale();
glsafe(::glScaled(gui_scale, gui_scale, 1.0));
glsafe(::glPushAttrib(GL_ENABLE_BIT));
glsafe(::glLineStipple(4, 0xAAAA));
glsafe(::glEnable(GL_LINE_STIPPLE));
::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());
glsafe(::glPopAttrib());
glsafe(::glPopMatrix());
}
} // namespace GUI
} // namespace Slic3r
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