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Add boilerplate for shader based csg

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This commit is contained in:
tamasmeszaros 2019-12-20 12:25:44 +01:00
parent 4f97a7122f
commit 93d0bbd7ef
7 changed files with 282 additions and 122 deletions
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45
sandboxes/opencsg/Engine.hpp
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@ -1,5 +1,5 @@
#ifndef SLIC3R_OCSG_EXMP_ENGINE_HPP
#define SLIC3R_OCSG_EXMP_ENGINE_HPP_HPP
#define SLIC3R_OCSG_EXMP_ENGINE_HPP
#include <vector>
#include <memory>
@ -25,7 +25,7 @@ template<class T> using wkptr = std::weak_ptr<T>;
template<class T, class A = std::allocator<T>> using vector = std::vector<T, A>;
// remove empty weak pointers from a vector
template<class L> void cleanup(vector<std::weak_ptr<L>> &listeners) {
template<class L> inline void cleanup(vector<std::weak_ptr<L>> &listeners) {
auto it = std::remove_if(listeners.begin(), listeners.end(),
[](auto &l) { return !l.lock(); });
listeners.erase(it, listeners.end());
@ -34,7 +34,7 @@ template<class L> void cleanup(vector<std::weak_ptr<L>> &listeners) {
// Call a class method on each element of a vector of objects (weak pointers)
// of the same type.
template<class F, class L, class...Args>
void call(F &&f, vector<std::weak_ptr<L>> &listeners, Args&&... args) {
inline void call(F &&f, vector<std::weak_ptr<L>> &listeners, Args&&... args) {
for (auto &l : listeners)
if (auto p = l.lock()) ((p.get())->*f)(std::forward<Args>(args)...);
}
@ -171,19 +171,30 @@ public:
// Try to enable or disable multisampling.
bool enable_multisampling(bool e = true);
// A primitive that can be used with OpenCSG rendering algorithms.
// Does a similar job to GLVolume.
class Primitive : public OpenCSG::Primitive
template<class It,
class Trafo,
class GetPt,
class V = typename std::iterator_traits<It>::value_type>
inline std::vector<V> transform_pts(
It from, It to, Trafo &&tr, GetPt &&point)
{
vector<V> ret;
ret.reserve(to - from);
for(auto it = from; it != to; ++it) {
V v = *it;
v.pos = tr * point(*it);
ret.emplace_back(std::move(v));
}
return ret;
}
class Volume {
IndexedVertexArray m_geom;
Geometry::Transformation m_trafo;
public:
using OpenCSG::Primitive::Primitive;
Primitive() : OpenCSG::Primitive(OpenCSG::Intersection, 1) {}
void render() override;
void render();
void translation(const Vec3d &offset) { m_trafo.set_offset(offset); }
void rotation(const Vec3d &rot) { m_trafo.set_rotation(rot); }
@ -197,6 +208,18 @@ public:
}
};
// A primitive that can be used with OpenCSG rendering algorithms.
// Does a similar job to GLVolume.
class Primitive : public Volume, public OpenCSG::Primitive
{
public:
using OpenCSG::Primitive::Primitive;
Primitive() : OpenCSG::Primitive(OpenCSG::Intersection, 1) {}
void render() override { Volume::render(); }
};
// A simple representation of a camera in a 3D scene
class Camera {
protected: