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dust3d/thirdparty/cgal/CGAL-4.13/include/CGAL/Qt/Basic_viewer_qt.h

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// Copyright (c) 2018 GeometryFactory Sarl (France).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org).
// You can redistribute it and/or modify it under the terms of the GNU
// General Public License as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL$
// $Id$
// SPDX-License-Identifier: GPL-3.0+
//
//
// Author(s) : Guillaume Damiand <guillaume.damiand@liris.cnrs.fr>
#ifndef CGAL_BASIC_VIEWER_QT_H
#define CGAL_BASIC_VIEWER_QT_H
#include <CGAL/license/GraphicsView.h>
#include <iostream>
#ifdef CGAL_USE_BASIC_VIEWER
#include <QApplication>
#include <QKeyEvent>
#include <CGAL/Qt/qglviewer.h>
#include <QKeyEvent>
#include <QOpenGLFunctions>
#include <QOpenGLVertexArrayObject>
#include <QGLBuffer>
#include <QOpenGLShaderProgram>
#include <vector>
#include <cstdlib>
#include <CGAL/Buffer_for_vao.h>
#include <CGAL/Qt/CreateOpenGLContext.h>
#include <CGAL/Random.h>
namespace CGAL
{
//------------------------------------------------------------------------------
const char vertex_source_color[] =
{
"#version 120 \n"
"attribute highp vec4 vertex;\n"
"attribute highp vec3 normal;\n"
"attribute highp vec3 color;\n"
"uniform highp mat4 mvp_matrix;\n"
"uniform highp mat4 mv_matrix; \n"
"varying highp vec4 fP; \n"
"varying highp vec3 fN; \n"
"varying highp vec4 fColor; \n"
"uniform highp float point_size; \n"
"void main(void)\n"
"{\n"
" fP = mv_matrix * vertex; \n"
" fN = mat3(mv_matrix)* normal; \n"
" fColor = vec4(color, 1.0); \n"
" gl_PointSize = point_size;\n"
" gl_Position = mvp_matrix * vertex;\n"
"}"
};
const char fragment_source_color[] =
{
"#version 120 \n"
"varying highp vec4 fP; \n"
"varying highp vec3 fN; \n"
"varying highp vec4 fColor; \n"
"uniform vec4 light_pos; \n"
"uniform vec4 light_diff; \n"
"uniform vec4 light_spec; \n"
"uniform vec4 light_amb; \n"
"uniform float spec_power ; \n"
"void main(void) { \n"
" vec3 L = light_pos.xyz - fP.xyz; \n"
" vec3 V = -fP.xyz; \n"
" vec3 N = normalize(fN); \n"
" L = normalize(L); \n"
" V = normalize(V); \n"
" vec3 R = reflect(-L, N); \n"
" vec4 diffuse = max(dot(N,L), 0.0) * light_diff * fColor; \n"
" vec4 specular = pow(max(dot(R,V), 0.0), spec_power) * light_spec; \n"
"gl_FragColor = light_amb*fColor + diffuse ; \n"
"} \n"
"\n"
};
const char vertex_source_p_l[] =
{
"#version 120 \n"
"attribute highp vec4 vertex;\n"
"attribute highp vec3 color;\n"
"uniform highp mat4 mvp_matrix;\n"
"varying highp vec4 fColor; \n"
"uniform highp float point_size; \n"
"void main(void)\n"
"{\n"
" gl_PointSize = point_size;\n"
" fColor = vec4(color, 1.0); \n"
" gl_Position = mvp_matrix * vertex;\n"
"}"
};
const char fragment_source_p_l[] =
{
"#version 120 \n"
"varying highp vec4 fColor; \n"
"void main(void) { \n"
"gl_FragColor = fColor; \n"
"} \n"
"\n"
};
//------------------------------------------------------------------------------
inline CGAL::Color get_random_color(CGAL::Random& random)
{
CGAL::Color res;
do
{
res=CGAL::Color(random.get_int(0,256),
random.get_int(0,256),
random.get_int(0,256));
}
while(res.red()==255 && res.green()==255 && res.blue()==255);
return res;
}
//------------------------------------------------------------------------------
class Basic_viewer_qt : public CGAL::QGLViewer
{
typedef CGAL::Exact_predicates_inexact_constructions_kernel Local_kernel;
typedef Local_kernel::Point_3 Local_point;
typedef Local_kernel::Vector_3 Local_vector;
public:
// Constructor/Destructor
Basic_viewer_qt(QWidget* parent,
const char* title="",
bool draw_vertices=false,
bool draw_edges=true,
bool draw_faces=true,
bool use_mono_color=false,
bool inverse_normal=false) :
CGAL::QGLViewer(parent),
m_draw_vertices(draw_vertices),
m_draw_edges(draw_edges),
m_draw_faces(draw_faces),
m_flatShading(true),
m_use_mono_color(use_mono_color),
m_inverse_normal(inverse_normal),
m_size_points(7.),
m_size_edges(3.1),
m_vertices_mono_color(200, 60, 60),
m_edges_mono_color(0, 0, 0),
m_faces_mono_color(60, 60, 200),
m_ambient_color(0.6f, 0.5f, 0.5f, 0.5f),
m_are_buffers_initialized(false),
m_buffer_for_mono_points(&arrays[POS_MONO_POINTS],
NULL,
&m_bounding_box,
NULL, NULL, NULL),
m_buffer_for_colored_points(&arrays[POS_COLORED_POINTS],
NULL,
&m_bounding_box,
&arrays[COLOR_POINTS],
NULL, NULL),
m_buffer_for_mono_segments(&arrays[POS_MONO_SEGMENTS],
NULL,
&m_bounding_box,
NULL, NULL, NULL),
m_buffer_for_colored_segments(&arrays[POS_COLORED_SEGMENTS],
NULL,
&m_bounding_box,
&arrays[COLOR_SEGMENTS],
NULL, NULL),
m_buffer_for_mono_faces(&arrays[POS_MONO_FACES],
NULL,
&m_bounding_box,
NULL,
&arrays[FLAT_NORMAL_MONO_FACES],
&arrays[SMOOTH_NORMAL_MONO_FACES]),
m_buffer_for_colored_faces(&arrays[POS_COLORED_FACES],
NULL,
&m_bounding_box,
&arrays[COLOR_FACES],
&arrays[FLAT_NORMAL_COLORED_FACES],
&arrays[SMOOTH_NORMAL_COLORED_FACES])
{
if (title[0]==0)
setWindowTitle("CGAL Basic Viewer");
else
setWindowTitle(title);
resize(500, 450);
}
~Basic_viewer_qt()
{
for (unsigned int i=0; i<NB_VBO_BUFFERS; ++i)
buffers[i].destroy();
for (int i=0; i<NB_VAO_BUFFERS; ++i)
vao[i].destroy();
}
void clear()
{
for (unsigned int i=0; i<LAST_INDEX; ++i)
{ arrays[i].clear(); }
m_bounding_box=CGAL::Bbox_3();
}
bool is_empty() const
{
return (m_buffer_for_mono_points.is_empty() &&
m_buffer_for_colored_points.is_empty() &&
m_buffer_for_mono_segments.is_empty() &&
m_buffer_for_colored_segments.is_empty() &&
m_buffer_for_mono_faces.is_empty() &&
m_buffer_for_colored_faces.is_empty());
}
const CGAL::Bbox_3& bounding_box() const
{ return m_bounding_box; }
template<typename KPoint>
void add_point(const KPoint& p)
{ m_buffer_for_mono_points.add_point(p); }
template<typename KPoint>
void add_point(const KPoint& p, const CGAL::Color& acolor)
{ m_buffer_for_colored_points.add_point(p, acolor); }
template<typename KPoint>
void add_segment(const KPoint& p1, const KPoint& p2)
{ m_buffer_for_mono_segments.add_segment(p1, p2); }
template<typename KPoint>
void add_segment(const KPoint& p1, const KPoint& p2,
const CGAL::Color& acolor)
{ m_buffer_for_colored_segments.add_segment(p1, p2, acolor); }
bool is_a_face_started() const
{
return m_buffer_for_mono_faces.is_a_face_started() ||
m_buffer_for_colored_faces.is_a_face_started();
}
void face_begin()
{
if (is_a_face_started())
{
std::cerr<<"You cannot start a new face before to finish the previous one."<<std::endl;
}
else
{ m_buffer_for_mono_faces.face_begin(); }
}
void face_begin(const CGAL::Color& acolor)
{
if (is_a_face_started())
{
std::cerr<<"You cannot start a new face before to finish the previous one."<<std::endl;
}
else
{ m_buffer_for_colored_faces.face_begin(acolor); }
}
template<typename KPoint>
bool add_point_in_face(const KPoint& kp)
{
if (m_buffer_for_mono_faces.is_a_face_started())
{ return m_buffer_for_mono_faces.add_point_in_face(kp); }
else if (m_buffer_for_colored_faces.is_a_face_started())
{ return m_buffer_for_colored_faces.add_point_in_face(kp); }
return false;
}
template<typename KPoint, typename KVector>
bool add_point_in_face(const KPoint& kp, const KVector& p_normal)
{
if (m_buffer_for_mono_faces.is_a_face_started())
{ return m_buffer_for_mono_faces.add_point_in_face(kp, p_normal); }
else if (m_buffer_for_colored_faces.is_a_face_started())
{ return m_buffer_for_colored_faces.add_point_in_face(kp, p_normal); }
return false;
}
void face_end()
{
if (m_buffer_for_mono_faces.is_a_face_started())
{ m_buffer_for_mono_faces.face_end(); }
else if (m_buffer_for_colored_faces.is_a_face_started())
{ return m_buffer_for_colored_faces.face_end(); }
}
protected:
void compile_shaders()
{
rendering_program_face.removeAllShaders();
rendering_program_p_l.removeAllShaders();
// Create the buffers
for (unsigned int i=0; i<NB_VBO_BUFFERS; ++i)
{
if(!buffers[i].isCreated() && !buffers[i].create())
{ std::cerr<<"VBO Creation number "<<i<<" FAILED"<<std::endl; }
}
for (int i=0; i<NB_VAO_BUFFERS; ++i)
{
if(!vao[i].isCreated() && !vao[i].create())
{ std::cerr<<"VAO Creation number "<<i<<" FAILED"<<std::endl; }
}
// Vertices and segments shader
QOpenGLShader *vertex_shader_p_l = new QOpenGLShader(QOpenGLShader::Vertex);
if(!vertex_shader_p_l->compileSourceCode(vertex_source_p_l))
{ std::cerr<<"Compiling vertex source FAILED"<<std::endl; }
QOpenGLShader *fragment_shader_p_l= new QOpenGLShader(QOpenGLShader::Fragment);
if(!fragment_shader_p_l->compileSourceCode(fragment_source_p_l))
{ std::cerr<<"Compiling fragmentsource FAILED"<<std::endl; }
if(!rendering_program_p_l.addShader(vertex_shader_p_l))
{ std::cerr<<"adding vertex shader FAILED"<<std::endl; }
if(!rendering_program_p_l.addShader(fragment_shader_p_l))
{ std::cerr<<"adding fragment shader FAILED"<<std::endl; }
if(!rendering_program_p_l.link())
{ std::cerr<<"linking Program FAILED"<<std::endl; }
// Faces shader
QOpenGLShader *vertex_shader_face = new QOpenGLShader(QOpenGLShader::Vertex);
if(!vertex_shader_face->compileSourceCode(vertex_source_color))
{ std::cerr<<"Compiling vertex source FAILED"<<std::endl; }
QOpenGLShader *fragment_shader_face= new QOpenGLShader(QOpenGLShader::Fragment);
if(!fragment_shader_face->compileSourceCode(fragment_source_color))
{ std::cerr<<"Compiling fragmentsource FAILED"<<std::endl; }
if(!rendering_program_face.addShader(vertex_shader_face))
{ std::cerr<<"adding vertex shader FAILED"<<std::endl; }
if(!rendering_program_face.addShader(fragment_shader_face))
{ std::cerr<<"adding fragment shader FAILED"<<std::endl; }
if(!rendering_program_face.link())
{ std::cerr<<"linking Program FAILED"<<std::endl; }
}
void initialize_buffers()
{
rendering_program_p_l.bind();
// 1) POINT SHADER
// 1.1) Mono points
vao[VAO_MONO_POINTS].bind();
unsigned int bufn = 0;
assert(bufn<NB_VBO_BUFFERS);
buffers[bufn].bind();
buffers[bufn].allocate(arrays[POS_MONO_POINTS].data(),
static_cast<int>(arrays[POS_MONO_POINTS].size()*sizeof(float)));
rendering_program_p_l.enableAttributeArray("vertex");
rendering_program_p_l.setAttributeBuffer("vertex",GL_FLOAT,0,3);
buffers[bufn].release();
rendering_program_p_l.disableAttributeArray("color");
vao[VAO_MONO_POINTS].release();
// 1.2) Color points
vao[VAO_COLORED_POINTS].bind();
++bufn;
assert(bufn<NB_VBO_BUFFERS);
buffers[bufn].bind();
buffers[bufn].allocate(arrays[POS_COLORED_POINTS].data(),
static_cast<int>(arrays[POS_COLORED_POINTS].size()*sizeof(float)));
rendering_program_p_l.enableAttributeArray("vertex");
rendering_program_p_l.setAttributeBuffer("vertex",GL_FLOAT,0,3);
buffers[bufn].release();
++bufn;
assert(bufn<NB_VBO_BUFFERS);
buffers[bufn].bind();
buffers[bufn].allocate(arrays[COLOR_POINTS].data(),
static_cast<int>(arrays[COLOR_POINTS].size()*sizeof(float)));
rendering_program_p_l.enableAttributeArray("color");
rendering_program_p_l.setAttributeBuffer("color",GL_FLOAT,0,3);
buffers[bufn].release();
vao[VAO_COLORED_POINTS].release();
// 2) SEGMENT SHADER
// 2.1) Mono segments
vao[VAO_MONO_SEGMENTS].bind();
++bufn;
assert(bufn<NB_VBO_BUFFERS);
buffers[bufn].bind();
buffers[bufn].allocate(arrays[POS_MONO_SEGMENTS].data(),
static_cast<int>(arrays[POS_MONO_SEGMENTS].size()*sizeof(float)));
rendering_program_p_l.enableAttributeArray("vertex");
rendering_program_p_l.setAttributeBuffer("vertex",GL_FLOAT,0,3);
buffers[bufn].release();
rendering_program_p_l.disableAttributeArray("color");
vao[VAO_MONO_SEGMENTS].release();
// 1.2) Color segments
vao[VAO_COLORED_SEGMENTS].bind();
++bufn;
assert(bufn<NB_VBO_BUFFERS);
buffers[bufn].bind();
buffers[bufn].allocate(arrays[POS_COLORED_SEGMENTS].data(),
static_cast<int>(arrays[POS_COLORED_SEGMENTS].size()*sizeof(float)));
rendering_program_p_l.enableAttributeArray("vertex");
rendering_program_p_l.setAttributeBuffer("vertex",GL_FLOAT,0,3);
buffers[bufn].release();
++bufn;
assert(bufn<NB_VBO_BUFFERS);
buffers[bufn].bind();
buffers[bufn].allocate(arrays[COLOR_SEGMENTS].data(),
static_cast<int>(arrays[COLOR_SEGMENTS].size()*sizeof(float)));
rendering_program_p_l.enableAttributeArray("color");
rendering_program_p_l.setAttributeBuffer("color",GL_FLOAT,0,3);
buffers[bufn].release();
vao[VAO_COLORED_SEGMENTS].release();
rendering_program_p_l.release();
// 3) FACE SHADER
rendering_program_face.bind();
// 3.1) Mono faces
vao[VAO_MONO_FACES].bind();
// 3.1.1) points of the mono faces
++bufn;
assert(bufn<NB_VBO_BUFFERS);
buffers[bufn].bind();
buffers[bufn].allocate(arrays[POS_MONO_FACES].data(),
static_cast<int>(arrays[POS_MONO_FACES].size()*sizeof(float)));
rendering_program_face.enableAttributeArray("vertex");
rendering_program_face.setAttributeBuffer("vertex",GL_FLOAT,0,3);
buffers[bufn].release();
// 3.1.2) normals of the mono faces
++bufn;
assert(bufn<NB_VBO_BUFFERS);
buffers[bufn].bind();
if (m_flatShading)
{
buffers[bufn].allocate(arrays[FLAT_NORMAL_MONO_FACES].data(),
static_cast<int>(arrays[FLAT_NORMAL_MONO_FACES].size()*
sizeof(float)));
}
else
{
buffers[bufn].allocate(arrays[SMOOTH_NORMAL_MONO_FACES].data(),
static_cast<int>(arrays[SMOOTH_NORMAL_MONO_FACES].size()*
sizeof(float)));
}
rendering_program_face.enableAttributeArray("normal");
rendering_program_face.setAttributeBuffer("normal",GL_FLOAT,0,3);
buffers[bufn].release();
// 3.1.3) color of the mono faces
rendering_program_face.disableAttributeArray("color");
vao[VAO_MONO_FACES].release();
// 3.2) Color faces
vao[VAO_COLORED_FACES].bind();
// 3.2.1) points of the color faces
++bufn;
assert(bufn<NB_VBO_BUFFERS);
buffers[bufn].bind();
buffers[bufn].allocate(arrays[POS_COLORED_FACES].data(),
static_cast<int>(arrays[POS_COLORED_FACES].size()*sizeof(float)));
rendering_program_face.enableAttributeArray("vertex");
rendering_program_face.setAttributeBuffer("vertex",GL_FLOAT,0,3);
buffers[bufn].release();
// 3.2.2) normals of the color faces
++bufn;
assert(bufn<NB_VBO_BUFFERS);
buffers[bufn].bind();
if (m_flatShading)
{
buffers[bufn].allocate(arrays[FLAT_NORMAL_COLORED_FACES].data(),
static_cast<int>(arrays[FLAT_NORMAL_COLORED_FACES].size()*
sizeof(float)));
}
else
{
buffers[bufn].allocate(arrays[SMOOTH_NORMAL_COLORED_FACES].data(),
static_cast<int>(arrays[SMOOTH_NORMAL_COLORED_FACES].size()*
sizeof(float)));
}
rendering_program_face.enableAttributeArray("normal");
rendering_program_face.setAttributeBuffer("normal",GL_FLOAT,0,3);
buffers[bufn].release();
// 3.2.3) colors of the faces
++bufn;
assert(bufn<NB_VBO_BUFFERS);
buffers[bufn].bind();
buffers[bufn].allocate(arrays[COLOR_FACES].data(),
static_cast<int>(arrays[COLOR_FACES].size()*sizeof(float)));
rendering_program_face.enableAttributeArray("color");
rendering_program_face.setAttributeBuffer("color",GL_FLOAT,0,3);
buffers[bufn].release();
vao[VAO_COLORED_FACES].release();
rendering_program_face.release();
m_are_buffers_initialized = true;
}
void attrib_buffers(CGAL::QGLViewer* viewer)
{
QMatrix4x4 mvpMatrix;
QMatrix4x4 mvMatrix;
double mat[16];
viewer->camera()->getModelViewProjectionMatrix(mat);
for(int i=0; i < 16; i++)
{
mvpMatrix.data()[i] = (float)mat[i];
}
viewer->camera()->getModelViewMatrix(mat);
for(int i=0; i < 16; i++)
{
mvMatrix.data()[i] = (float)mat[i];
}
// define material
QVector4D diffuse( 0.9f,
0.9f,
0.9f,
0.9f );
QVector4D specular( 0.0f,
0.0f,
0.0f,
1.0f );
CGAL::Bbox_3 bb;
if (bb==bounding_box()) // Case of "empty" bounding box
{
bb=Local_point(CGAL::ORIGIN).bbox();
bb=bb + Local_point(1,1,1).bbox(); // To avoid a warning from Qglviewer
}
else
{ bb=bounding_box(); }
QVector4D position((bb.xmax()-bb.xmin())/2,
(bb.ymax()-bb.ymin())/2,
bb.zmax(), 0.0);
GLfloat shininess = 1.0f;
rendering_program_face.bind();
int mvpLocation = rendering_program_face.uniformLocation("mvp_matrix");
int mvLocation = rendering_program_face.uniformLocation("mv_matrix");
int lightLocation[5];
lightLocation[0] = rendering_program_face.uniformLocation("light_pos");
lightLocation[1] = rendering_program_face.uniformLocation("light_diff");
lightLocation[2] = rendering_program_face.uniformLocation("light_spec");
lightLocation[3] = rendering_program_face.uniformLocation("light_amb");
lightLocation[4] = rendering_program_face.uniformLocation("spec_power");
rendering_program_face.setUniformValue(lightLocation[0], position);
rendering_program_face.setUniformValue(lightLocation[1], diffuse);
rendering_program_face.setUniformValue(lightLocation[2], specular);
rendering_program_face.setUniformValue(lightLocation[3], m_ambient_color);
rendering_program_face.setUniformValue(lightLocation[4], shininess);
rendering_program_face.setUniformValue(mvpLocation, mvpMatrix);
rendering_program_face.setUniformValue(mvLocation, mvMatrix);
rendering_program_face.release();
rendering_program_p_l.bind();
int mvpLocation2 = rendering_program_p_l.uniformLocation("mvp_matrix");
rendering_program_p_l.setUniformValue(mvpLocation2, mvpMatrix);
rendering_program_p_l.release();
}
virtual void draw()
{
glEnable(GL_DEPTH_TEST);
if(!m_are_buffers_initialized)
{ initialize_buffers(); }
QColor color;
attrib_buffers(this);
if(m_draw_vertices)
{
rendering_program_p_l.bind();
vao[VAO_MONO_POINTS].bind();
color.setRgbF((double)m_vertices_mono_color.red()/(double)255,
(double)m_vertices_mono_color.green()/(double)255,
(double)m_vertices_mono_color.blue()/(double)255);
rendering_program_p_l.setAttributeValue("color",color);
rendering_program_p_l.setUniformValue("point_size", GLfloat(m_size_points));
glDrawArrays(GL_POINTS, 0, static_cast<GLsizei>(arrays[POS_MONO_POINTS].size()/3));
vao[VAO_MONO_POINTS].release();
vao[VAO_COLORED_POINTS].bind();
if (m_use_mono_color)
{
color.setRgbF((double)m_vertices_mono_color.red()/(double)255,
(double)m_vertices_mono_color.green()/(double)255,
(double)m_vertices_mono_color.blue()/(double)255);
rendering_program_p_l.disableAttributeArray("color");
rendering_program_p_l.setAttributeValue("color",color);
}
else
{
rendering_program_p_l.enableAttributeArray("color");
}
rendering_program_p_l.setUniformValue("point_size", GLfloat(m_size_points));
glDrawArrays(GL_POINTS, 0, static_cast<GLsizei>(arrays[POS_COLORED_POINTS].size()/3));
vao[VAO_COLORED_POINTS].release();
rendering_program_p_l.release();
}
if(m_draw_edges)
{
rendering_program_p_l.bind();
vao[VAO_MONO_SEGMENTS].bind();
color.setRgbF((double)m_edges_mono_color.red()/(double)255,
(double)m_edges_mono_color.green()/(double)255,
(double)m_edges_mono_color.blue()/(double)255);
rendering_program_p_l.setAttributeValue("color",color);
glLineWidth(m_size_edges);
glDrawArrays(GL_LINES, 0, static_cast<GLsizei>(arrays[POS_MONO_SEGMENTS].size()/3));
vao[VAO_MONO_SEGMENTS].release();
vao[VAO_COLORED_SEGMENTS].bind();
if (m_use_mono_color)
{
color.setRgbF((double)m_edges_mono_color.red()/(double)255,
(double)m_edges_mono_color.green()/(double)255,
(double)m_edges_mono_color.blue()/(double)255);
rendering_program_p_l.disableAttributeArray("color");
rendering_program_p_l.setAttributeValue("color",color);
}
else
{
rendering_program_p_l.enableAttributeArray("color");
}
glLineWidth(m_size_edges);
glDrawArrays(GL_LINES, 0, static_cast<GLsizei>(arrays[POS_COLORED_SEGMENTS].size()/3));
vao[VAO_COLORED_SEGMENTS].release();
rendering_program_p_l.release();
}
if (m_draw_faces)
{
rendering_program_face.bind();
vao[VAO_MONO_FACES].bind();
color.setRgbF((double)m_faces_mono_color.red()/(double)255,
(double)m_faces_mono_color.green()/(double)255,
(double)m_faces_mono_color.blue()/(double)255);
rendering_program_face.setAttributeValue("color",color);
glDrawArrays(GL_TRIANGLES, 0, static_cast<GLsizei>(arrays[POS_MONO_FACES].size()/3));
vao[VAO_MONO_FACES].release();
vao[VAO_COLORED_FACES].bind();
if (m_use_mono_color)
{
color.setRgbF((double)m_faces_mono_color.red()/(double)255,
(double)m_faces_mono_color.green()/(double)255,
(double)m_faces_mono_color.blue()/(double)255);
rendering_program_face.disableAttributeArray("color");
rendering_program_face.setAttributeValue("color",color);
}
else
{
rendering_program_face.enableAttributeArray("color");
}
glDrawArrays(GL_TRIANGLES, 0, static_cast<GLsizei>(arrays[POS_COLORED_FACES].size()/3));
vao[VAO_COLORED_FACES].release();
rendering_program_face.release();
}
}
virtual void redraw()
{
initialize_buffers();
update();
}
virtual void init()
{
// Restore previous viewer state.
restoreStateFromFile();
initializeOpenGLFunctions();
// Define 'Control+Q' as the new exit shortcut (default was 'Escape')
setShortcut(qglviewer::EXIT_VIEWER, ::Qt::CTRL+::Qt::Key_Q);
// Add custom key description (see keyPressEvent).
setKeyDescription(::Qt::Key_E, "Toggles edges display");
setKeyDescription(::Qt::Key_F, "Toggles faces display");
setKeyDescription(::Qt::Key_G, "Switch between flat/Gouraud shading display");
setKeyDescription(::Qt::Key_M, "Toggles mono color for all faces");
setKeyDescription(::Qt::Key_N, "Inverse direction of normals");
setKeyDescription(::Qt::Key_V, "Toggles vertices display");
setKeyDescription(::Qt::Key_Plus, "Increase size of edges");
setKeyDescription(::Qt::Key_Minus, "Decrease size of edges");
setKeyDescription(::Qt::Key_Plus+::Qt::ControlModifier, "Increase size of vertices");
setKeyDescription(::Qt::Key_Minus+::Qt::ControlModifier, "Decrease size of vertices");
setKeyDescription(::Qt::Key_PageDown, "Increase light (all colors, use shift/alt/ctrl for one rgb component)");
setKeyDescription(::Qt::Key_PageUp, "Decrease light (all colors, use shift/alt/ctrl for one rgb component)");
// Light default parameters
glLineWidth(m_size_edges);
glEnable(GL_POLYGON_OFFSET_FILL);
glPolygonOffset(1.f,1.f);
glClearColor(1.0f,1.0f,1.0f,0.0f);
glDisable(GL_BLEND);
glEnable(GL_LINE_SMOOTH);
glDisable(GL_POLYGON_SMOOTH_HINT);
glBlendFunc(GL_ONE, GL_ZERO);
glHint(GL_LINE_SMOOTH_HINT, GL_FASTEST);
compile_shaders();
CGAL::Bbox_3 bb;
if (bb==bounding_box()) // Case of "empty" bounding box
{
bb=Local_point(CGAL::ORIGIN).bbox();
bb=bb + Local_point(1,1,1).bbox(); // To avoid a warning from Qglviewer
}
else
{ bb=bounding_box(); }
this->camera()->setSceneBoundingBox(CGAL::qglviewer::Vec(bb.xmin(),
bb.ymin(),
bb.zmin()),
CGAL::qglviewer::Vec(bb.xmax(),
bb.ymax(),
bb.zmax()));
this->showEntireScene();
}
void negate_all_normals()
{
for (unsigned int k=BEGIN_NORMAL; k<END_NORMAL; ++k)
{
for (std::size_t i=0; i<arrays[k].size(); ++i)
{ arrays[k][i]=-arrays[k][i]; }
}
}
virtual void keyPressEvent(QKeyEvent *e)
{
const ::Qt::KeyboardModifiers modifiers = e->modifiers();
if ((e->key()==::Qt::Key_E) && (modifiers==::Qt::NoButton))
{
m_draw_edges=!m_draw_edges;
displayMessage(QString("Draw edges=%1.").arg(m_draw_edges?"true":"false"));
update();
}
else if ((e->key()==::Qt::Key_F) && (modifiers==::Qt::NoButton))
{
m_draw_faces=!m_draw_faces;
displayMessage(QString("Draw faces=%1.").arg(m_draw_faces?"true":"false"));
update();
}
else if ((e->key()==::Qt::Key_G) && (modifiers==::Qt::NoButton))
{
m_flatShading=!m_flatShading;
if (m_flatShading)
displayMessage("Flat shading.");
else
displayMessage("Gouraud shading.");
redraw();
}
else if ((e->key()==::Qt::Key_M) && (modifiers==::Qt::NoButton))
{
m_use_mono_color=!m_use_mono_color;
displayMessage(QString("Mono color=%1.").arg(m_use_mono_color?"true":"false"));
update();
}
else if ((e->key()==::Qt::Key_N) && (modifiers==::Qt::NoButton))
{
m_inverse_normal=!m_inverse_normal;
displayMessage(QString("Inverse normal=%1.").arg(m_inverse_normal?"true":"false"));
negate_all_normals();
redraw();
}
else if ((e->key()==::Qt::Key_V) && (modifiers==::Qt::NoButton))
{
m_draw_vertices=!m_draw_vertices;
displayMessage(QString("Draw vertices=%1.").arg(m_draw_vertices?"true":"false"));
update();
}
else if ((e->key()==::Qt::Key_Plus) && (!modifiers.testFlag(::Qt::ControlModifier))) // No ctrl
{
m_size_edges+=.5;
displayMessage(QString("Size of edges=%1.").arg(m_size_edges));
update();
}
else if ((e->key()==::Qt::Key_Minus) && (!modifiers.testFlag(::Qt::ControlModifier))) // No ctrl
{
if (m_size_edges>.5) m_size_edges-=.5;
displayMessage(QString("Size of edges=%1.").arg(m_size_edges));
update();
}
else if ((e->key()==::Qt::Key_Plus) && (modifiers.testFlag(::Qt::ControlModifier)))
{
m_size_points+=.5;
displayMessage(QString("Size of points=%1.").arg(m_size_points));
update();
}
else if ((e->key()==::Qt::Key_Minus) && (modifiers.testFlag(::Qt::ControlModifier)))
{
if (m_size_points>.5) m_size_points-=.5;
displayMessage(QString("Size of points=%1.").arg(m_size_points));
update();
}
else if ((e->key()==::Qt::Key_PageUp) && (modifiers==::Qt::NoButton))
{
m_ambient_color.setX(m_ambient_color.x()+.1);
if (m_ambient_color.x()>1.) m_ambient_color.setX(1.);
m_ambient_color.setY(m_ambient_color.x()+.1);
if (m_ambient_color.y()>1.) m_ambient_color.setY(1.);
m_ambient_color.setZ(m_ambient_color.x()+.1);
if (m_ambient_color.z()>1.) m_ambient_color.setZ(1.);
displayMessage(QString("Light color=(%1 %2 %3).").
arg(m_ambient_color.x()).arg(m_ambient_color.y()).arg(m_ambient_color.z()));
update();
}
else if ((e->key()==::Qt::Key_PageDown) && (modifiers==::Qt::NoButton))
{
m_ambient_color.setX(m_ambient_color.x()-.1);
if (m_ambient_color.x()<0.) m_ambient_color.setX(0.);
m_ambient_color.setY(m_ambient_color.y()-.1);
if (m_ambient_color.y()<0.) m_ambient_color.setY(0.);
m_ambient_color.setZ(m_ambient_color.z()-.1);
if (m_ambient_color.z()<0.) m_ambient_color.setZ(0.);
displayMessage(QString("Light color=(%1 %2 %3).").
arg(m_ambient_color.x()).arg(m_ambient_color.y()).arg(m_ambient_color.z()));
update();
}
else if ((e->key()==::Qt::Key_PageUp) && (modifiers==::Qt::ShiftModifier))
{
m_ambient_color.setX(m_ambient_color.x()+.1);
if (m_ambient_color.x()>1.) m_ambient_color.setX(1.);
displayMessage(QString("Light color=(%1 %2 %3).").
arg(m_ambient_color.x()).arg(m_ambient_color.y()).arg(m_ambient_color.z()));
update();
}
else if ((e->key()==::Qt::Key_PageUp) && (modifiers==::Qt::AltModifier))
{
m_ambient_color.setY(m_ambient_color.y()+.1);
if (m_ambient_color.y()>1.) m_ambient_color.setY(1.);
displayMessage(QString("Light color=(%1 %2 %3).").
arg(m_ambient_color.x()).arg(m_ambient_color.y()).arg(m_ambient_color.z()));
update();
}
else if ((e->key()==::Qt::Key_PageUp) && (modifiers==::Qt::ControlModifier))
{
m_ambient_color.setZ(m_ambient_color.z()+.1);
if (m_ambient_color.z()>1.) m_ambient_color.setZ(1.);
displayMessage(QString("Light color=(%1 %2 %3).").
arg(m_ambient_color.x()).arg(m_ambient_color.y()).arg(m_ambient_color.z()));
update();
}
else if ((e->key()==::Qt::Key_PageDown) && (modifiers==::Qt::ShiftModifier))
{
m_ambient_color.setX(m_ambient_color.x()-.1);
if (m_ambient_color.x()<0.) m_ambient_color.setX(0.);
displayMessage(QString("Light color=(%1 %2 %3).").
arg(m_ambient_color.x()).arg(m_ambient_color.y()).arg(m_ambient_color.z()));
update();
}
else if ((e->key()==::Qt::Key_PageDown) && (modifiers==::Qt::AltModifier))
{
m_ambient_color.setY(m_ambient_color.y()-.1);
if (m_ambient_color.y()<0.) m_ambient_color.setY(0.);
displayMessage(QString("Light color=(%1 %2 %3).").
arg(m_ambient_color.x()).arg(m_ambient_color.y()).arg(m_ambient_color.z()));
update();
}
else if ((e->key()==::Qt::Key_PageDown) && (modifiers==::Qt::ControlModifier))
{
m_ambient_color.setZ(m_ambient_color.z()-.1);
if (m_ambient_color.z()<0.) m_ambient_color.setZ(0.);
displayMessage(QString("Light color=(%1 %2 %3).").
arg(m_ambient_color.x()).arg(m_ambient_color.y()).arg(m_ambient_color.z()));
update();
}
else
CGAL::QGLViewer::keyPressEvent(e);
}
virtual QString helpString() const
{
QString text("<h2>C G A L B a s i c V i e w e r</h2>");
text += "Use the mouse to move the camera around the object. ";
text += "You can respectively revolve around, zoom and translate with "
"the three mouse buttons. ";
text += "Left and middle buttons pressed together rotate around the "
"camera view direction axis<br><br>";
text += "Pressing <b>Alt</b> and one of the function keys "
"(<b>F1</b>..<b>F12</b>) defines a camera keyFrame. ";
text += "Simply press the function key again to restore it. "
"Several keyFrames define a ";
text += "camera path. Paths are saved when you quit the application "
"and restored at next start.<br><br>";
text += "Press <b>F</b> to display the frame rate, <b>A</b> for the "
"world axis, ";
text += "<b>Alt+Return</b> for full screen mode and <b>Control+S</b> "
"to save a snapshot. ";
text += "See the <b>Keyboard</b> tab in this window for a complete "
"shortcut list.<br><br>";
text += "Double clicks automates single click actions: A left button "
"double click aligns the closer axis with the camera (if close enough). ";
text += "A middle button double click fits the zoom of the camera and "
"the right button re-centers the scene.<br><br>";
text += "A left button double click while holding right button pressed "
"defines the camera <i>Revolve Around Point</i>. ";
text += "See the <b>Mouse</b> tab and the documentation web pages for "
"details.<br><br>";
text += "Press <b>Escape</b> to exit the viewer.";
return text;
}
private:
bool m_draw_vertices;
bool m_draw_edges;
bool m_draw_faces;
bool m_flatShading;
bool m_use_mono_color;
bool m_inverse_normal;
double m_size_points;
double m_size_edges;
CGAL::Color m_vertices_mono_color;
CGAL::Color m_edges_mono_color;
CGAL::Color m_faces_mono_color;
QVector4D m_ambient_color;
bool m_are_buffers_initialized;
CGAL::Bbox_3 m_bounding_box;
// The following enum gives the indices of different elements of arrays vectors.
enum
{
BEGIN_POS=0,
POS_MONO_POINTS=BEGIN_POS,
POS_COLORED_POINTS,
POS_MONO_SEGMENTS,
POS_COLORED_SEGMENTS,
POS_MONO_FACES,
POS_COLORED_FACES,
END_POS,
BEGIN_COLOR=END_POS,
COLOR_POINTS=BEGIN_COLOR,
COLOR_SEGMENTS,
COLOR_FACES,
END_COLOR,
BEGIN_NORMAL=END_COLOR,
SMOOTH_NORMAL_MONO_FACES=BEGIN_NORMAL,
FLAT_NORMAL_MONO_FACES,
SMOOTH_NORMAL_COLORED_FACES,
FLAT_NORMAL_COLORED_FACES,
END_NORMAL,
LAST_INDEX=END_NORMAL
};
std::vector<float> arrays[LAST_INDEX];
Buffer_for_vao<float> m_buffer_for_mono_points;
Buffer_for_vao<float> m_buffer_for_colored_points;
Buffer_for_vao<float> m_buffer_for_mono_segments;
Buffer_for_vao<float> m_buffer_for_colored_segments;
Buffer_for_vao<float> m_buffer_for_mono_faces;
Buffer_for_vao<float> m_buffer_for_colored_faces;
static const unsigned int NB_VBO_BUFFERS=(END_POS-BEGIN_POS)+
(END_COLOR-BEGIN_COLOR)+2; // +2 for 2 vectors of normals
QGLBuffer buffers[NB_VBO_BUFFERS];
// The following enum gives the indices of the differents vao.
enum
{ VAO_MONO_POINTS=0,
VAO_COLORED_POINTS,
VAO_MONO_SEGMENTS,
VAO_COLORED_SEGMENTS,
VAO_MONO_FACES,
VAO_COLORED_FACES,
NB_VAO_BUFFERS
};
QOpenGLVertexArrayObject vao[NB_VAO_BUFFERS];
QOpenGLShaderProgram rendering_program_face;
QOpenGLShaderProgram rendering_program_p_l;
};
} // End namespace CGAL
#else // CGAL_USE_BASIC_VIEWER
namespace CGAL
{
template<class T, class ColorFunctor>
void draw(const T&, const char*, bool, const ColorFunctor&)
{
std::cerr<<"Impossible to draw because CGAL_USE_BASIC_VIEWER is not defined."
<<std::endl;
}
template<class T>
void draw(const T&, const char*, bool)
{
std::cerr<<"Impossible to draw because CGAL_USE_BASIC_VIEWER is not defined."
<<std::endl;
}
template<class T>
void draw(const T&, const char*)
{
std::cerr<<"Impossible to draw because CGAL_USE_BASIC_VIEWER is not defined."
<<std::endl;
}
template<class T>
void draw(const T&)
{
std::cerr<<"Impossible to draw because CGAL_USE_BASIC_VIEWER is not defined."
<<std::endl;
}
} // End namespace CGAL
#endif // CGAL_USE_BASIC_VIEWER
#endif // CGAL_BASIC_VIEWER_QT_H
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