PrusaSlicer/src/slic3r/GUI/Gizmos/GLGizmoBase.cpp

241 lines
6.9 KiB
C++

#include "GLGizmoBase.hpp"
#include "slic3r/GUI/GLCanvas3D.hpp"
#include <GL/glew.h>
#include "slic3r/GUI/GUI_App.hpp"
// TODO: Display tooltips quicker on Linux
namespace Slic3r {
namespace GUI {
const float GLGizmoBase::Grabber::SizeFactor = 0.05f;
const float GLGizmoBase::Grabber::MinHalfSize = 1.5f;
const float GLGizmoBase::Grabber::DraggingScaleFactor = 1.25f;
GLGizmoBase::Grabber::Grabber()
: center(Vec3d::Zero())
, angles(Vec3d::Zero())
, dragging(false)
, enabled(true)
{
color = { 1.0f, 1.0f, 1.0f, 1.0f };
}
void GLGizmoBase::Grabber::render(bool hover, float size) const
{
std::array<float, 4> render_color;
if (hover) {
render_color[0] = (1.0f - color[0]);
render_color[1] = (1.0f - color[1]);
render_color[2] = (1.0f - color[2]);
render_color[3] = color[3];
}
else
render_color = color;
render(size, render_color, false);
}
float GLGizmoBase::Grabber::get_half_size(float size) const
{
return std::max(size * SizeFactor, MinHalfSize);
}
float GLGizmoBase::Grabber::get_dragging_half_size(float size) const
{
return get_half_size(size) * DraggingScaleFactor;
}
void GLGizmoBase::Grabber::render(float size, const std::array<float, 4>& render_color, bool picking) const
{
if (! cube_initialized) {
// This cannot be done in constructor, OpenGL is not yet
// initialized at that point (on Linux at least).
TriangleMesh mesh = make_cube(1., 1., 1.);
mesh.translate(Vec3f(-0.5, -0.5, -0.5));
const_cast<GLModel&>(cube).init_from(mesh);
const_cast<bool&>(cube_initialized) = true;
}
float fullsize = 2 * (dragging ? get_dragging_half_size(size) : get_half_size(size));
const_cast<GLModel*>(&cube)->set_color(-1, render_color);
glsafe(::glPushMatrix());
glsafe(::glTranslated(center.x(), center.y(), center.z()));
glsafe(::glRotated(Geometry::rad2deg(angles.z()), 0.0, 0.0, 1.0));
glsafe(::glRotated(Geometry::rad2deg(angles.y()), 0.0, 1.0, 0.0));
glsafe(::glRotated(Geometry::rad2deg(angles.x()), 1.0, 0.0, 0.0));
glsafe(::glScaled(fullsize, fullsize, fullsize));
cube.render();
glsafe(::glPopMatrix());
}
GLGizmoBase::GLGizmoBase(GLCanvas3D& parent, const std::string& icon_filename, unsigned int sprite_id)
: m_parent(parent)
, m_group_id(-1)
, m_state(Off)
, m_shortcut_key(0)
, m_icon_filename(icon_filename)
, m_sprite_id(sprite_id)
, m_hover_id(-1)
, m_dragging(false)
, m_imgui(wxGetApp().imgui())
, m_first_input_window_render(true)
{
m_base_color = DEFAULT_BASE_COLOR;
m_drag_color = DEFAULT_DRAG_COLOR;
m_highlight_color = DEFAULT_HIGHLIGHT_COLOR;
m_cone.init_from(make_cone(1., 1., 2 * PI / 24));
m_sphere.init_from(make_sphere(1., (2 * M_PI) / 24.));
m_cylinder.init_from(make_cylinder(1., 1., 2 * PI / 24.));
}
void GLGizmoBase::set_hover_id(int id)
{
if (m_grabbers.empty() || (id < (int)m_grabbers.size()))
{
m_hover_id = id;
on_set_hover_id();
}
}
void GLGizmoBase::set_highlight_color(const std::array<float, 4>& color)
{
m_highlight_color = color;
}
void GLGizmoBase::enable_grabber(unsigned int id)
{
if (id < m_grabbers.size())
m_grabbers[id].enabled = true;
on_enable_grabber(id);
}
void GLGizmoBase::disable_grabber(unsigned int id)
{
if (id < m_grabbers.size())
m_grabbers[id].enabled = false;
on_disable_grabber(id);
}
void GLGizmoBase::start_dragging()
{
m_dragging = true;
for (int i = 0; i < (int)m_grabbers.size(); ++i)
{
m_grabbers[i].dragging = (m_hover_id == i);
}
on_start_dragging();
}
void GLGizmoBase::stop_dragging()
{
m_dragging = false;
for (int i = 0; i < (int)m_grabbers.size(); ++i)
{
m_grabbers[i].dragging = false;
}
on_stop_dragging();
}
void GLGizmoBase::update(const UpdateData& data)
{
if (m_hover_id != -1)
on_update(data);
}
std::array<float, 4> GLGizmoBase::picking_color_component(unsigned int id) const
{
static const float INV_255 = 1.0f / 255.0f;
id = BASE_ID - id;
if (m_group_id > -1)
id -= m_group_id;
// color components are encoded to match the calculation of volume_id made into GLCanvas3D::_picking_pass()
return std::array<float, 4> {
float((id >> 0) & 0xff) * INV_255, // red
float((id >> 8) & 0xff) * INV_255, // green
float((id >> 16) & 0xff) * INV_255, // blue
float(picking_checksum_alpha_channel(id & 0xff, (id >> 8) & 0xff, (id >> 16) & 0xff))* INV_255 // checksum for validating against unwanted alpha blending and multi sampling
};
}
void GLGizmoBase::render_grabbers(const BoundingBoxf3& box) const
{
render_grabbers((float)((box.size().x() + box.size().y() + box.size().z()) / 3.0));
}
void GLGizmoBase::render_grabbers(float size) const
{
GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light");
if (shader == nullptr)
return;
shader->start_using();
shader->set_uniform("emission_factor", 0.1);
for (int i = 0; i < (int)m_grabbers.size(); ++i) {
if (m_grabbers[i].enabled)
m_grabbers[i].render(m_hover_id == i, size);
}
shader->stop_using();
}
void GLGizmoBase::render_grabbers_for_picking(const BoundingBoxf3& box) const
{
float mean_size = (float)((box.size().x() + box.size().y() + box.size().z()) / 3.0);
for (unsigned int i = 0; i < (unsigned int)m_grabbers.size(); ++i) {
if (m_grabbers[i].enabled) {
std::array<float, 4> color = picking_color_component(i);
m_grabbers[i].color = color;
m_grabbers[i].render_for_picking(mean_size);
}
}
}
std::string GLGizmoBase::format(float value, unsigned int decimals) const
{
return Slic3r::string_printf("%.*f", decimals, value);
}
void GLGizmoBase::render_input_window(float x, float y, float bottom_limit)
{
on_render_input_window(x, y, bottom_limit);
if (m_first_input_window_render) {
// for some reason, the imgui dialogs are not shown on screen in the 1st frame where they are rendered, but show up only with the 2nd rendered frame
// so, we forces another frame rendering the first time the imgui window is shown
m_parent.set_as_dirty();
m_first_input_window_render = false;
}
}
// Produce an alpha channel checksum for the red green blue components. The alpha channel may then be used to verify, whether the rgb components
// were not interpolated by alpha blending or multi sampling.
unsigned char picking_checksum_alpha_channel(unsigned char red, unsigned char green, unsigned char blue)
{
// 8 bit hash for the color
unsigned char b = ((((37 * red) + green) & 0x0ff) * 37 + blue) & 0x0ff;
// Increase enthropy by a bit reversal
b = (b & 0xF0) >> 4 | (b & 0x0F) << 4;
b = (b & 0xCC) >> 2 | (b & 0x33) << 2;
b = (b & 0xAA) >> 1 | (b & 0x55) << 1;
// Flip every second bit to increase the enthropy even more.
b ^= 0x55;
return b;
}
} // namespace GUI
} // namespace Slic3r