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OrcaSlicer/sandboxes/opencsg/Engine.cpp
Vojtech Bubnik e185bf58b7 Replaced "Simple shorthands for smart pointers" shptr, uqptr, wkptr 
with their original names. Using weird shorthands makes the code
unreadable for anyone but the original author.

template<class T> using shptr = std::shared_ptr<T>;
template<class T> using uqptr = std::unique_ptr<T>;
template<class T> using wkptr = std::weak_ptr<T>;
2021-10-04 16:56:26 +02:00

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#include "Engine.hpp"
#include <libslic3r/Utils.hpp>
#include <libslic3r/SLAPrint.hpp>
#include <GL/glew.h>
#include <boost/log/trivial.hpp>
#ifndef NDEBUG
#define HAS_GLSAFE
#endif
#ifdef HAS_GLSAFE
extern void glAssertRecentCallImpl(const char *file_name, unsigned int line, const char *function_name);
inline void glAssertRecentCall() { glAssertRecentCallImpl(__FILE__, __LINE__, __FUNCTION__); }
#define glsafe(cmd) do { cmd; glAssertRecentCallImpl(__FILE__, __LINE__, __FUNCTION__); } while (false)
#define glcheck() do { glAssertRecentCallImpl(__FILE__, __LINE__, __FUNCTION__); } while (false)
void glAssertRecentCallImpl(const char *file_name, unsigned int line, const char *function_name)
{
GLenum err = glGetError();
if (err == GL_NO_ERROR)
return;
const char *sErr = 0;
switch (err) {
case GL_INVALID_ENUM: sErr = "Invalid Enum"; break;
case GL_INVALID_VALUE: sErr = "Invalid Value"; break;
// be aware that GL_INVALID_OPERATION is generated if glGetError is executed between the execution of glBegin and the corresponding execution of glEnd
case GL_INVALID_OPERATION: sErr = "Invalid Operation"; break;
case GL_STACK_OVERFLOW: sErr = "Stack Overflow"; break;
case GL_STACK_UNDERFLOW: sErr = "Stack Underflow"; break;
case GL_OUT_OF_MEMORY: sErr = "Out Of Memory"; break;
default: sErr = "Unknown"; break;
}
BOOST_LOG_TRIVIAL(error) << "OpenGL error in " << file_name << ":" << line << ", function " << function_name << "() : " << (int)err << " - " << sErr;
assert(false);
}
#else
inline void glAssertRecentCall() { }
#define glsafe(cmd) cmd
#define glcheck()
#endif
namespace Slic3r { namespace GL {
Scene::Scene() = default;
Scene::~Scene() = default;
void CSGDisplay::render_scene()
{
GLfloat color[] = {1.f, 1.f, 0.f, 0.f};
glsafe(::glColor4fv(color));
if (m_csgsettings.is_enabled()) {
OpenCSG::render(m_scene_cache.primitives_csg);
glDepthFunc(GL_EQUAL);
}
for (auto& p : m_scene_cache.primitives_csg) p->render();
if (m_csgsettings.is_enabled()) glDepthFunc(GL_LESS);
for (auto& p : m_scene_cache.primitives_free) p->render();
glFlush();
}
void Scene::set_print(std::unique_ptr<SLAPrint> &&print)
{
m_print = std::move(print);
// Notify displays
call(&Listener::on_scene_updated, m_listeners, *this);
}
BoundingBoxf3 Scene::get_bounding_box() const
{
return m_print->model().bounding_box();
}
void CSGDisplay::SceneCache::clear()
{
primitives_csg.clear();
primitives_free.clear();
primitives.clear();
}
std::shared_ptr<Primitive> CSGDisplay::SceneCache::add_mesh(const TriangleMesh &mesh)
{
auto p = std::make_shared<Primitive>();
p->load_mesh(mesh);
primitives.emplace_back(p);
primitives_free.emplace_back(p.get());
return p;
}
std::shared_ptr<Primitive> CSGDisplay::SceneCache::add_mesh(const TriangleMesh &mesh,
OpenCSG::Operation o,
unsigned c)
{
auto p = std::make_shared<Primitive>(o, c);
p->load_mesh(mesh);
primitives.emplace_back(p);
primitives_csg.emplace_back(p.get());
return p;
}
void IndexedVertexArray::push_geometry(float x, float y, float z, float nx, float ny, float nz)
{
assert(this->vertices_and_normals_interleaved_VBO_id == 0);
if (this->vertices_and_normals_interleaved_VBO_id != 0)
return;
if (this->vertices_and_normals_interleaved.size() + 6 > this->vertices_and_normals_interleaved.capacity())
this->vertices_and_normals_interleaved.reserve(next_highest_power_of_2(this->vertices_and_normals_interleaved.size() + 6));
this->vertices_and_normals_interleaved.emplace_back(nx);
this->vertices_and_normals_interleaved.emplace_back(ny);
this->vertices_and_normals_interleaved.emplace_back(nz);
this->vertices_and_normals_interleaved.emplace_back(x);
this->vertices_and_normals_interleaved.emplace_back(y);
this->vertices_and_normals_interleaved.emplace_back(z);
this->vertices_and_normals_interleaved_size = this->vertices_and_normals_interleaved.size();
}
void IndexedVertexArray::push_triangle(int idx1, int idx2, int idx3) {
assert(this->vertices_and_normals_interleaved_VBO_id == 0);
if (this->vertices_and_normals_interleaved_VBO_id != 0)
return;
if (this->triangle_indices.size() + 3 > this->vertices_and_normals_interleaved.capacity())
this->triangle_indices.reserve(next_highest_power_of_2(this->triangle_indices.size() + 3));
this->triangle_indices.emplace_back(idx1);
this->triangle_indices.emplace_back(idx2);
this->triangle_indices.emplace_back(idx3);
this->triangle_indices_size = this->triangle_indices.size();
}
void IndexedVertexArray::load_mesh(const TriangleMesh &mesh)
{
assert(triangle_indices.empty() && vertices_and_normals_interleaved_size == 0);
assert(quad_indices.empty() && triangle_indices_size == 0);
assert(vertices_and_normals_interleaved.size() % 6 == 0 && quad_indices_size == vertices_and_normals_interleaved.size());
this->vertices_and_normals_interleaved.reserve(this->vertices_and_normals_interleaved.size() + 3 * 3 * 2 * mesh.facets_count());
int vertices_count = 0;
for (size_t i = 0; i < mesh.facets_count(); ++i) {
const stl_facet &facet = mesh.stl.facet_start[i];
for (int j = 0; j < 3; ++j)
this->push_geometry(facet.vertex[j](0), facet.vertex[j](1), facet.vertex[j](2), facet.normal(0), facet.normal(1), facet.normal(2));
this->push_triangle(vertices_count, vertices_count + 1, vertices_count + 2);
vertices_count += 3;
}
}
void IndexedVertexArray::finalize_geometry()
{
assert(this->vertices_and_normals_interleaved_VBO_id == 0);
assert(this->triangle_indices_VBO_id == 0);
assert(this->quad_indices_VBO_id == 0);
if (!this->vertices_and_normals_interleaved.empty()) {
glsafe(
::glGenBuffers(1, &this->vertices_and_normals_interleaved_VBO_id));
glsafe(::glBindBuffer(GL_ARRAY_BUFFER,
this->vertices_and_normals_interleaved_VBO_id));
glsafe(
::glBufferData(GL_ARRAY_BUFFER,
GLsizeiptr(
this->vertices_and_normals_interleaved.size() *
4),
this->vertices_and_normals_interleaved.data(),
GL_STATIC_DRAW));
glsafe(::glBindBuffer(GL_ARRAY_BUFFER, 0));
this->vertices_and_normals_interleaved.clear();
}
if (!this->triangle_indices.empty()) {
glsafe(::glGenBuffers(1, &this->triangle_indices_VBO_id));
glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,
this->triangle_indices_VBO_id));
glsafe(::glBufferData(GL_ELEMENT_ARRAY_BUFFER,
GLsizeiptr(this->triangle_indices.size() * 4),
this->triangle_indices.data(), GL_STATIC_DRAW));
glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0));
this->triangle_indices.clear();
}
if (!this->quad_indices.empty()) {
glsafe(::glGenBuffers(1, &this->quad_indices_VBO_id));
glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,
this->quad_indices_VBO_id));
glsafe(::glBufferData(GL_ELEMENT_ARRAY_BUFFER,
GLsizeiptr(this->quad_indices.size() * 4),
this->quad_indices.data(), GL_STATIC_DRAW));
glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0));
this->quad_indices.clear();
}
}
void IndexedVertexArray::release_geometry()
{
if (this->vertices_and_normals_interleaved_VBO_id) {
glsafe(
::glDeleteBuffers(1,
&this->vertices_and_normals_interleaved_VBO_id));
this->vertices_and_normals_interleaved_VBO_id = 0;
}
if (this->triangle_indices_VBO_id) {
glsafe(::glDeleteBuffers(1, &this->triangle_indices_VBO_id));
this->triangle_indices_VBO_id = 0;
}
if (this->quad_indices_VBO_id) {
glsafe(::glDeleteBuffers(1, &this->quad_indices_VBO_id));
this->quad_indices_VBO_id = 0;
}
this->clear();
}
void IndexedVertexArray::render() const
{
assert(this->vertices_and_normals_interleaved_VBO_id != 0);
assert(this->triangle_indices_VBO_id != 0 ||
this->quad_indices_VBO_id != 0);
glsafe(::glBindBuffer(GL_ARRAY_BUFFER,
this->vertices_and_normals_interleaved_VBO_id));
glsafe(::glVertexPointer(3, GL_FLOAT, 6 * sizeof(float),
reinterpret_cast<const void *>(3 * sizeof(float))));
glsafe(::glNormalPointer(GL_FLOAT, 6 * sizeof(float), nullptr));
glsafe(::glEnableClientState(GL_VERTEX_ARRAY));
glsafe(::glEnableClientState(GL_NORMAL_ARRAY));
// Render using the Vertex Buffer Objects.
if (this->triangle_indices_size > 0) {
glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,
this->triangle_indices_VBO_id));
glsafe(::glDrawElements(GL_TRIANGLES,
GLsizei(this->triangle_indices_size),
GL_UNSIGNED_INT, nullptr));
glsafe(glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0));
}
if (this->quad_indices_size > 0) {
glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,
this->quad_indices_VBO_id));
glsafe(::glDrawElements(GL_QUADS, GLsizei(this->quad_indices_size),
GL_UNSIGNED_INT, nullptr));
glsafe(glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0));
}
glsafe(::glDisableClientState(GL_VERTEX_ARRAY));
glsafe(::glDisableClientState(GL_NORMAL_ARRAY));
glsafe(::glBindBuffer(GL_ARRAY_BUFFER, 0));
}
void IndexedVertexArray::clear() {
this->vertices_and_normals_interleaved.clear();
this->triangle_indices.clear();
this->quad_indices.clear();
vertices_and_normals_interleaved_size = 0;
triangle_indices_size = 0;
quad_indices_size = 0;
}
void IndexedVertexArray::shrink_to_fit() {
this->vertices_and_normals_interleaved.shrink_to_fit();
this->triangle_indices.shrink_to_fit();
this->quad_indices.shrink_to_fit();
}
void Volume::render()
{
glsafe(::glPushMatrix());
glsafe(::glMultMatrixd(m_trafo.get_matrix().data()));
m_geom.render();
glsafe(::glPopMatrix());
}
void Display::clear_screen()
{
glViewport(0, 0, GLsizei(m_size.x()), GLsizei(m_size.y()));
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
}
Display::~Display()
{
OpenCSG::freeResources();
}
void Display::set_active(long width, long height)
{
if (!m_initialized) {
glewInit();
m_initialized = true;
}
// gray background
glClearColor(0.9f, 0.9f, 0.9f, 1.0f);
// Enable two OpenGL lights
GLfloat light_diffuse[] = { 1.0f, 1.0f, 0.0f, 1.0f}; // White diffuse light
GLfloat light_position0[] = {-1.0f, -1.0f, -1.0f, 0.0f}; // Infinite light location
GLfloat light_position1[] = { 1.0f, 1.0f, 1.0f, 0.0f}; // Infinite light location
glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
glLightfv(GL_LIGHT0, GL_POSITION, light_position0);
glEnable(GL_LIGHT0);
glLightfv(GL_LIGHT1, GL_DIFFUSE, light_diffuse);
glLightfv(GL_LIGHT1, GL_POSITION, light_position1);
glEnable(GL_LIGHT1);
glEnable(GL_LIGHTING);
glEnable(GL_NORMALIZE);
// Use depth buffering for hidden surface elimination
glEnable(GL_DEPTH_TEST);
glEnable(GL_STENCIL_TEST);
set_screen_size(width, height);
}
void Display::set_screen_size(long width, long height)
{
if (m_size.x() != width || m_size.y() != height)
m_camera->set_screen(width, height);
m_size = {width, height};
}
void Display::repaint()
{
clear_screen();
m_camera->view();
render_scene();
m_fps_counter.update();
swap_buffers();
}
void Controller::on_scene_updated(const Scene &scene)
{
const SLAPrint *print = scene.get_print();
if (!print) return;
auto bb = scene.get_bounding_box();
double d = std::max(std::max(bb.size().x(), bb.size().y()), bb.size().z());
m_wheel_pos = long(2 * d);
call_cameras(&Camera::set_zoom, m_wheel_pos);
call(&Display::on_scene_updated, m_displays, scene);
}
void Controller::on_scroll(long v, long d, MouseInput::WheelAxis /*wa*/)
{
m_wheel_pos += v / d;
call_cameras(&Camera::set_zoom, m_wheel_pos);
call(&Display::repaint, m_displays);
}
void Controller::on_moved_to(long x, long y)
{
if (m_left_btn) {
call_cameras(&Camera::rotate, (Vec2i{x, y} - m_mouse_pos).cast<float>());
call(&Display::repaint, m_displays);
}
m_mouse_pos = {x, y};
}
void CSGDisplay::apply_csgsettings(const CSGSettings &settings)
{
using namespace OpenCSG;
bool needupdate = m_csgsettings.get_convexity() != settings.get_convexity();
m_csgsettings = settings;
setOption(AlgorithmSetting, m_csgsettings.get_algo());
setOption(DepthComplexitySetting, m_csgsettings.get_depth_algo());
setOption(DepthBoundsOptimization, m_csgsettings.get_optimization());
if (needupdate) {
for (OpenCSG::Primitive * p : m_scene_cache.primitives_csg)
if (p->getConvexity() > 1)
p->setConvexity(m_csgsettings.get_convexity());
}
}
void CSGDisplay::on_scene_updated(const Scene &scene)
{
const SLAPrint *print = scene.get_print();
if (!print) return;
m_scene_cache.clear();
for (const SLAPrintObject *po : print->objects()) {
const ModelObject *mo = po->model_object();
TriangleMesh msh = mo->raw_mesh();
sla::DrainHoles holedata = mo->sla_drain_holes;
for (const ModelInstance *mi : mo->instances) {
TriangleMesh mshinst = msh;
auto interior = po->hollowed_interior_mesh();
interior.transform(po->trafo().inverse());
mshinst.merge(interior);
mi->transform_mesh(&mshinst);
auto bb = mshinst.bounding_box();
auto center = bb.center().cast<float>();
mshinst.translate(-center);
m_scene_cache.add_mesh(mshinst, OpenCSG::Intersection,
m_csgsettings.get_convexity());
}
for (const sla::DrainHole &holept : holedata) {
TriangleMesh holemesh = sla::to_triangle_mesh(holept.to_mesh());
m_scene_cache.add_mesh(holemesh, OpenCSG::Subtraction, 1);
}
}
repaint();
}
void Camera::view()
{
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(0.0, m_zoom, 0.0, /* eye is at (0,zoom,0) */
m_referene.x(), m_referene.y(), m_referene.z(),
0.0, 0.0, 1.0); /* up is in positive Y direction */
// TODO Could have been set in prevoius gluLookAt in first argument
glRotatef(m_rot.y(), 1.0, 0.0, 0.0);
glRotatef(m_rot.x(), 0.0, 0.0, 1.0);
if (m_clip_z > 0.) {
GLdouble plane[] = {0., 0., 1., m_clip_z};
glClipPlane(GL_CLIP_PLANE0, plane);
glEnable(GL_CLIP_PLANE0);
} else {
glDisable(GL_CLIP_PLANE0);
}
}
void PerspectiveCamera::set_screen(long width, long height)
{
// Setup the view of the CSG shape
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0, width / double(height), .1, 200.0);
glMatrixMode(GL_MODELVIEW);
}
bool enable_multisampling(bool e)
{
if (!e) { glDisable(GL_MULTISAMPLE); return false; }
GLint is_ms_context;
glGetIntegerv(GL_SAMPLE_BUFFERS, &is_ms_context);
if (is_ms_context) { glEnable(GL_MULTISAMPLE); return true; }
else return false;
}
MouseInput::Listener::~Listener() = default;
void FpsCounter::update()
{
++m_frames;
TimePoint msec = Clock::now();
double seconds_window = to_sec(msec - m_window);
m_fps = 0.5 * m_fps + 0.5 * (m_frames / seconds_window);
if (to_sec(msec - m_last) >= m_resolution) {
m_last = msec;
for (auto &l : m_listeners) l(m_fps);
}
if (seconds_window >= m_window_size) {
m_frames = 0;
m_window = msec;
}
}
}} // namespace Slic3r::GL
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