81 lines
2.1 KiB
C++
81 lines
2.1 KiB
C++
|
#pragma once
|
||
|
|
|
||
|
|
#include <OpenGLObjects.h>
|
||
|
|
|
||
|
|
#include <cstdint>
|
||
|
|
|
||
|
|
#include <functional>
|
||
|
|
#include <type_traits>
|
||
|
|
#include <utility>
|
||
|
|
#include <vector>
|
||
|
|
|
||
|
|
#include <Eigen/Core>
|
||
|
|
|
||
|
|
// helper array with the corner vertices of an icosahedron
|
||
|
|
constexpr inline float icosahedronVertices[] = {
|
||
|
|
0.000000f, -1.000000f, 0.000000f,
|
||
|
|
0.723600f, -0.447214f, 0.525720f,
|
||
|
|
-0.276386f, -0.447214f, 0.850640f,
|
||
|
|
-0.894424f, -0.447214f, 0.000000f,
|
||
|
|
-0.276386f, -0.447214f, -0.850640f,
|
||
|
|
0.723600f, -0.447214f, -0.525720f,
|
||
|
|
0.276386f, 0.447214f, 0.850640f,
|
||
|
|
-0.723600f, 0.447214f, 0.525720f,
|
||
|
|
-0.723600f, 0.447214f, -0.525720f,
|
||
|
|
0.276386f, 0.447214f, -0.850640f,
|
||
|
|
0.894424f, 0.447214f, 0.000000f,
|
||
|
|
0.000000f, 1.000000f, 0.000000f
|
||
|
|
};
|
||
|
|
|
||
|
|
// helper array of indices which form the triangular faces of an icosahedron
|
||
|
|
constexpr inline GLubyte icosahedronIndices[] = {
|
||
|
|
0, 1, 2,
|
||
|
|
1, 0, 5,
|
||
|
|
0, 2, 3,
|
||
|
|
0, 3, 4,
|
||
|
|
0, 4, 5,
|
||
|
|
1, 5, 10,
|
||
|
|
2, 1, 6,
|
||
|
|
3, 2, 7,
|
||
|
|
4, 3, 8,
|
||
|
|
5, 4, 9,
|
||
|
|
1, 10, 6,
|
||
|
|
2, 6, 7,
|
||
|
|
3, 7, 8,
|
||
|
|
4, 8, 9,
|
||
|
|
5, 9, 10,
|
||
|
|
6, 10, 11,
|
||
|
|
7, 6, 11,
|
||
|
|
8, 7, 11,
|
||
|
|
9, 8, 11,
|
||
|
|
10, 9, 11
|
||
|
|
};
|
||
|
|
|
||
|
|
namespace std
|
||
|
|
{
|
||
|
|
// specialization of std::hash for std::pair so that std::unordered_map<std::pair<A,B>, T> can be used
|
||
|
|
template<typename A, typename B>
|
||
|
|
struct hash<pair<A, B>>
|
||
|
|
{
|
||
|
|
using argument_type = pair<A, B>;
|
||
|
|
using result_type = size_t;
|
||
|
|
|
||
|
|
result_type operator()(argument_type const & p) const noexcept
|
||
|
|
{
|
||
|
|
return hash<decay_t<A>>{}(p.first) ^ (hash<decay_t<B>>{}(p.second) << 1);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
// helper function to subdivide a triangular mesh and project it onto the unit sphere
|
||
|
|
void subdivideIcosphere(std::vector<float> & vertices, std::vector<unsigned> & indices);
|
||
|
|
|
||
|
|
// helper function to compute a perspective projection matrix with an infinite far range
|
||
|
|
Eigen::Matrix4d calculateInfinitePerspective(double minimumFieldOfView, double aspectRatio, double zNear);
|
||
|
|
|
||
|
|
// helper function to compute a lookat-matrix (camera at eye, target at center, global up direction; up must be linearly independent of (center - eye))
|
||
|
|
Eigen::Matrix4d calculateLookAtMatrix(Eigen::Vector3d eye, Eigen::Vector3d center, Eigen::Vector3d up);
|
||
|
|
|
||
|
|
// helper function to load a Qt resource as an array of char (bytes)
|
||
|
|
std::vector<char> loadResource(char const * path);
|