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/* This file is part of the Gudhi Library. The Gudhi library
* (Geometric Understanding in Higher Dimensions) is a generic C++
* library for computational topology.
*
* Author(s): Clement Jamin
*
* Copyright (C) 2016 Inria
*
* Modification(s):
* - YYYY/MM Author: Description of the modification
*/
#ifndef GUDHI_TC_RIB_EXPORTER_H
#define GUDHI_TC_RIB_EXPORTER_H
#include <gudhi/Tangential_complex/utilities.h>
#include <tuple>
#include <string>
template <typename PointRandomAccessRange, typename SimplexRange>
class RIB_exporter {
typedef typename PointRandomAccessRange::value_type Point;
typedef typename SimplexRange::value_type Simplex;
public:
typedef std::tuple<double, double, double, double> Color; // RGBA
typedef std::tuple<int, int, int> Coords_choice;
// Constructor
RIB_exporter(
PointRandomAccessRange const& points,
SimplexRange const& simplices,
std::ofstream &out,
std::string const& rendered_image_filename = "export.tif",
bool is_preview = false, // low-quality
Coords_choice coords_choice = std::make_tuple(0, 1, 2),
int image_width = 1920,
int image_height = 1080,
Color const& triangle_color = std::make_tuple(1., 1., 1., 1.),
bool ambient_light = true,
double ambient_intensity = 0.3,
bool shadow = true,
double shadow_intensity = 0.85,
double point_sphere_radius = 0.003)
: m_points(points),
m_simplices(simplices),
m_out(out),
m_rendered_image_filename(rendered_image_filename),
m_is_preview(is_preview),
m_coords_choice(coords_choice),
m_image_width(image_width),
m_image_height(image_height),
m_current_color(0., 0., 0., 0.),
m_current_alpha(1),
m_triangle_color(triangle_color),
m_ambient_light(ambient_light),
m_ambient_intensity(ambient_intensity),
m_shadow(shadow),
m_shadow_intensity(shadow_intensity),
m_point_sphere_radius(point_sphere_radius) {
m_out.precision(8);
}
void write_file() {
write_header();
write_lights();
/*if (m_point_sphere_radius != 0.)
write_point_spheres();*/
write_triangles();
m_out << "WorldEnd\n";
}
private:
void write_header() {
m_out << "Option \"searchpath\" \"shader\" "
"\".:./shaders:%PIXIE_SHADERS%:%PIXIEHOME%/shaders\"\n";
if (m_is_preview) {
m_out << "Attribute \"visibility\" \"specular\" 1\n"
<< "Attribute \"visibility\" \"transmission\" 1\n\n";
}
m_out << "Display \"" << m_rendered_image_filename << "\" \"file\" \"rgb\"\n";
if (!m_is_preview) {
m_out << "Format " << m_image_width << " " << m_image_height << " 1\n";
} else {
double ratio = double(m_image_height) / double(m_image_width);
int width = (ratio < 1.) ? 300 : int(300. / ratio);
int height = (ratio < 1.) ? int(ratio * 300.) : 300;
m_out << "Format " << width << " " << height << " 1\n";
}
if (m_image_width > m_image_height) {
double ratio = double(m_image_height) / double(m_image_width);
m_out << "ScreenWindow -1 1 " << -ratio << " " << ratio << "\n";
} else if (m_image_height > m_image_width) {
double ratio = double(m_image_width) / double(m_image_height);
m_out << "ScreenWindow " << -ratio << " " << ratio << " -1 1\n";
}
m_out << "Projection \"perspective\" \"fov\" 45\n"
<< "Translate 0 0 3\n"
<< "PixelSamples 4 4\n"
<< "PixelFilter \"catmull-rom\" 3 3\n"
<< "ShadingInterpolation \"smooth\"\n"
<< "Rotate -10 20 0 1\n"
<< "WorldBegin\n";
}
void write_lights() {
if (!m_is_preview) {
// ShadowLight
m_out << "LightSource \"shadowdistant\" 1 \"from\" [0 0 0] \"to\" [0 0 1]"
<< " \"shadowname\" \"raytrace\" \"intensity\" "
<< m_shadow_intensity << "\n";
// Ambient light
m_out << "LightSource \"ambientlight\" 2 \"intensity\" "
<< m_ambient_intensity << "\n";
} else {
m_out << "LightSource \"distantLight\" 1 \"from\" [0 0 0] \"to\" [0 0 1]"
<< " \"intensity\" " << m_shadow_intensity << "\n";
// Ambient light
m_out << "LightSource \"ambientlight\" 2 \"intensity\" "
<< m_ambient_intensity << "\n";
}
// Background light
m_out << "LightSource \"ambientlight\" 99 \"intensity\" 1\n";
// Turn background light OFF
turn_background_light(false);
}
void turn_background_light(bool turn_on) {
if (!turn_on) {
m_out << "Illuminate 1 1" << std::endl;
if (!m_is_preview)
m_out << "Illuminate 2 1" << std::endl;
m_out << "Illuminate 99 0" << std::endl;
} else {
m_out << "Illuminate 1 0" << std::endl;
if (!m_is_preview)
m_out << "Illuminate 2 0" << std::endl;
m_out << "Illuminate 99 1" << std::endl;
}
}
void write_color(Color const& color, bool use_transparency) {
if (m_current_color == color)
return;
m_current_color = color;
// Write opacity data
if (use_transparency)
write_opacity(std::get<3>(color));
// Write color data
m_out << "Color [ " << std::get<0>(color) << " " << std::get<1>(color)
<< " " << std::get<2>(color) << " ]\n";
}
void write_opacity(const double alpha) {
if (m_current_alpha == alpha)
return;
m_current_alpha = alpha;
// Write opacity data
m_out << "Opacity " << alpha << " " << alpha << " " << alpha << std::endl;
}
void write_point(Point const& p) {
m_out << " " << p[std::get<0>(m_coords_choice)]
<< " " << p[std::get<1>(m_coords_choice)]
<< " " << p[std::get<2>(m_coords_choice)] << " ";
}
void write_triangles() {
m_out << "Surface \"plastic\" \"Ka\" 0.65 \"Kd\" 0.85 \"Ks\" 0.25 \"roughness\" 0.1" << std::endl;
for (auto const& simplex : m_simplices) {
std::vector<Simplex> triangles;
// Get the triangles composing the simplex
combinations(simplex, 3, std::back_inserter(triangles));
for (auto const& t : triangles)
write_triangle(t);
}
}
template <typename PointIndexRange>
void write_triangle(PointIndexRange const& t) {
// Color
write_color(m_triangle_color, true);
// Triangle
m_out << "Polygon \"P\" [";
for (auto idx : t)
write_point(m_points[idx]);
m_out << "]" << std::endl;
// Edges (will be drawn later on)
/*add_edge(p, q, edge_color);
add_edge(p, r, edge_color);
add_edge(q, r, edge_color);
// Vertices (will be drawn later on)
add_vertex(p, edge_color);
add_vertex(q, edge_color);
add_vertex(r, edge_color);*/
}
void write_point_sphere(Point const& p) {
if (m_point_sphere_radius == 0.)
return;
m_out << "Translate " << p[0] << " " << p[1] << " " << p[2] << std::endl;
// Sphere radius zmin zmax thetamax
m_out << "Sphere " << m_point_sphere_radius << " " << -m_point_sphere_radius
<< " " << m_point_sphere_radius << " 360" << std::endl;
m_out << "Identity" << std::endl;
}
void write_point_spheres() {
write_color(std::make_tuple(0.7, 0.7, 0.7, 0.5), true);
for (auto const& p : m_points)
write_point_sphere(p);
}
//===========================================================================
PointRandomAccessRange const& m_points;
SimplexRange const& m_simplices;
std::ofstream &m_out;
std::string m_rendered_image_filename;
bool m_is_preview;
Coords_choice m_coords_choice;
int m_image_width;
int m_image_height;
Color m_current_color;
Color m_triangle_color;
double m_current_alpha;
bool m_ambient_light;
double m_ambient_intensity;
bool m_shadow;
double m_shadow_intensity;
double m_point_sphere_radius;
};
#endif // GUDHI_TC_RIB_EXPORTER_H
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