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Merge pull request #109 from orange-cpp/feature/collider_interface

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Feature/collider interface
This commit is contained in:
Orange++
2025-12-06 14:59:34 +03:00
committed by GitHub
parent e97be8c142 27c1d147c5
commit acf36c3e04
8 changed files with 86 additions and 62 deletions
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10
include/omath/3d_primitives/mesh.hpp
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@@ -99,10 +99,10 @@ namespace omath::primitives
}
[[nodiscard]]
VectorType vertex_to_world_space(const Vector3<float>& vertex_position) const
VectorType vertex_position_to_world_space(const Vector3<float>& vertex_position) const
requires HasPosition<VertexType>
{
auto abs_vec = get_to_world_matrix() * mat_column_from_vector(vertex_position);
auto abs_vec = get_to_world_matrix() * mat_column_from_vector<typename Mat4X4::ContainedType, Mat4X4::get_store_ordering()>(vertex_position);
return {abs_vec.at(0, 0), abs_vec.at(1, 0), abs_vec.at(2, 0)};
}
@@ -111,9 +111,9 @@ namespace omath::primitives
Triangle<VectorType> make_face_in_world_space(const Ebo::const_iterator vao_iterator) const
requires HasPosition<VertexType>
{
return {vertex_to_world_space(m_vertex_buffer.at(vao_iterator->x).position),
vertex_to_world_space(m_vertex_buffer.at(vao_iterator->y).position),
vertex_to_world_space(m_vertex_buffer.at(vao_iterator->z).position)};
return {vertex_position_to_world_space(m_vertex_buffer.at(vao_iterator->x).position),
vertex_position_to_world_space(m_vertex_buffer.at(vao_iterator->y).position),
vertex_position_to_world_space(m_vertex_buffer.at(vao_iterator->z).position)};
}
private:

23
include/omath/collision/collider_interface.hpp Normal file
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@@ -0,0 +1,23 @@
//
// Created by Vladislav on 06.12.2025.
//
#pragma once
namespace omath::collision
{
template<class VecType = Vector3<float>>
class ColliderInterface
{
public:
using VectorType = VecType;
virtual ~ColliderInterface() = default;
[[nodiscard]]
virtual VectorType find_abs_furthest_vertex_position(const VectorType& direction) const = 0;
[[nodiscard]]
virtual const VectorType& get_origin() const = 0;
virtual void set_origin(const VectorType& new_origin) = 0;
};
}

37
include/omath/collision/epa_algorithm.hpp
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@@ -6,10 +6,10 @@
#include <cstdint>
#include <limits>
#include <memory>
#include <memory_resource>
#include <queue>
#include <utility>
#include <vector>
#include <memory_resource>
namespace omath::collision
{
@@ -23,16 +23,16 @@ namespace omath::collision
{ a / s } -> std::same_as<V>;
};
template<class ColliderType>
template<class ColliderInterfaceType>
class Epa final
{
public:
using VectorType = ColliderType::VectorType;
using VectorType = ColliderInterfaceType::VectorType;
static_assert(EpaVector<VectorType>, "VertexType must satisfy EpaVector concept");
struct Result final
{
VectorType normal{}; // outward normal (from B to A)
VectorType normal{}; // from A to B
VectorType penetration_vector;
float depth{0.0f};
int iterations{0};
@@ -48,7 +48,7 @@ namespace omath::collision
// Precondition: simplex.size()==4 and contains the origin.
[[nodiscard]]
static std::optional<Result> solve(const ColliderType& a, const ColliderType& b,
static std::optional<Result> solve(const ColliderInterfaceType& a, const ColliderInterfaceType& b,
const Simplex<VectorType>& simplex, const Params params = {},
std::shared_ptr<std::pmr::memory_resource> mem_resource = {
std::shared_ptr<void>{}, std::pmr::get_default_resource()})
@@ -86,25 +86,22 @@ namespace omath::collision
break;
const int fidx = heap.top().idx;
const Face f = faces[fidx];
const Face face = faces[fidx];
// Get the furthest point in face normal direction
const VectorType p = support_point(a, b, f.n);
const float p_dist = f.n.dot(p);
const VectorType p = support_point(a, b, face.n);
const float p_dist = face.n.dot(p);
// Converged if we can’t push the face closer than tolerance
if (p_dist - f.d <= params.tolerance)
if (p_dist - face.d <= params.tolerance)
{
out.normal = f.n;
out.depth = f.d; // along unit normal
out.normal = face.n;
out.depth = face.d; // along unit normal
out.iterations = it + 1;
out.num_vertices = static_cast<int>(vertexes.size());
out.num_faces = static_cast<int>(faces.size());
const auto centers = b.get_origin() - a.get_origin();
const auto sign = out.normal.dot(centers) >= 0 ? 1 : -1;
out.penetration_vector = out.normal * out.depth * sign;
out.penetration_vector = out.normal * out.depth;
return out;
}
@@ -163,10 +160,7 @@ namespace omath::collision
out.num_vertices = static_cast<int>(vertexes.size());
out.num_faces = static_cast<int>(faces.size());
const auto centers = b.get_origin() - a.get_origin();
const auto sign = out.normal.dot(centers) >= 0 ? 1 : -1;
out.penetration_vector = out.normal * out.depth * sign;
out.penetration_vector = out.normal * out.depth;
return out;
}
@@ -251,9 +245,10 @@ namespace omath::collision
}
[[nodiscard]]
static VectorType support_point(const ColliderType& a, const ColliderType& b, const VectorType& dir)
static VectorType support_point(const ColliderInterfaceType& a, const ColliderInterfaceType& b,
const VectorType& dir)
{
return a.find_abs_furthest_vertex(dir).position - b.find_abs_furthest_vertex(-dir).position;
return a.find_abs_furthest_vertex_position(dir) - b.find_abs_furthest_vertex_position(-dir);
}
template<class V>

19
include/omath/collision/gjk_algorithm.hpp
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@@ -14,28 +14,29 @@ namespace omath::collision
Simplex<VertexType> simplex; // valid only if hit == true and size==4
};
template<class ColliderType>
template<class ColliderInterfaceType>
class GjkAlgorithm final
{
using VertexType = ColliderType::VertexType;
using VectorType = VertexType::VectorType;
using VectorType = ColliderInterfaceType::VectorType;
public:
[[nodiscard]]
static VectorType find_support_vertex(const ColliderType& collider_a, const ColliderType& collider_b,
const VectorType& direction)
static VectorType find_support_vertex(const ColliderInterfaceType& collider_a,
const ColliderInterfaceType& collider_b, const VectorType& direction)
{
return collider_a.find_abs_furthest_vertex(direction).position - collider_b.find_abs_furthest_vertex(-direction).position;
return collider_a.find_abs_furthest_vertex_position(direction)
- collider_b.find_abs_furthest_vertex_position(-direction);
}
[[nodiscard]]
static bool is_collide(const ColliderType& collider_a, const ColliderType& collider_b)
static bool is_collide(const ColliderInterfaceType& collider_a, const ColliderInterfaceType& collider_b)
{
return is_collide_with_simplex_info(collider_a, collider_b).hit;
}
[[nodiscard]]
static GjkHitInfo<VectorType> is_collide_with_simplex_info(const ColliderType& collider_a,
const ColliderType& collider_b)
static GjkHitInfo<VectorType> is_collide_with_simplex_info(const ColliderInterfaceType& collider_a,
const ColliderInterfaceType& collider_b)
{
auto support = find_support_vertex(collider_a, collider_b, VectorType{1, 0, 0});

47
include/omath/collision/mesh_collider.hpp
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@@ -3,20 +3,46 @@
//
#pragma once
#include "collider_interface.hpp"
#include "omath/linear_algebra/vector3.hpp"
#ifdef OMATH_BUILD_TESTS
// ReSharper disable once CppInconsistentNaming
class UnitTestColider_FindFurthestVertex_Test;
#endif
namespace omath::collision
{
template<class MeshType>
class MeshCollider
class MeshCollider final : public ColliderInterface<typename MeshType::VertexType::VectorType>
{
#ifdef OMATH_BUILD_TESTS
friend UnitTestColider_FindFurthestVertex_Test;
#endif
public:
using VertexType = MeshType::VertexType;
using VectorType = VertexType::VectorType;
using VectorType = MeshType::VertexType::VectorType;
explicit MeshCollider(MeshType mesh): m_mesh(std::move(mesh))
{
}
[[nodiscard]]
VectorType find_abs_furthest_vertex_position(const VectorType& direction) const override
{
return m_mesh.vertex_position_to_world_space(find_furthest_vertex(direction).position);
}
[[nodiscard]]
const VectorType& get_origin() const override
{
return m_mesh.get_origin();
}
void set_origin(const VectorType& new_origin) override
{
m_mesh.set_origin(new_origin);
}
private:
[[nodiscard]]
const VertexType& find_furthest_vertex(const VectorType& direction) const
{
@@ -24,23 +50,6 @@ namespace omath::collision
m_mesh.m_vertex_buffer, [&direction](const auto& first, const auto& second)
{ return first.position.dot(direction) < second.position.dot(direction); });
}
[[nodiscard]]
VertexType find_abs_furthest_vertex(const VectorType& direction) const
{
const auto& vertex = find_furthest_vertex(direction);
auto new_vertex = vertex;
new_vertex.position = m_mesh.vertex_to_world_space(find_furthest_vertex(direction).position);
return new_vertex;
}
[[nodiscard]]
const VectorType& get_origin() const
{
return m_mesh.get_origin();
}
private:
MeshType m_mesh;
};
} // namespace omath::collision

2
include/omath/linear_algebra/mat.hpp
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@@ -46,7 +46,7 @@ namespace omath
}
[[nodiscard]]
constexpr static MatStoreType get_store_ordering() noexcept
consteval static MatStoreType get_store_ordering() noexcept
{
return StoreType;
}

2
tests/general/unit_test_colider.cpp
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@@ -17,7 +17,7 @@ TEST(UnitTestColider, CheckToWorld)
mesh.set_origin({0, 2, 0});
const omath::source_engine::MeshCollider collider(mesh);
const auto vertex = collider.find_abs_furthest_vertex({1.f, 0.f, 0.f}).position;
const auto vertex = collider.find_abs_furthest_vertex_position({1.f, 0.f, 0.f});
EXPECT_EQ(vertex, omath::Vector3<float>(1.f, 3.f, 1.f));
}

8
tests/general/unit_test_epa.cpp
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@@ -61,7 +61,7 @@ TEST(UnitTestEpa, TestCollisionTrue)
// Try both signs with a tiny margin (avoid grazing contacts)
const float margin = 1.0f + 1e-3f;
const auto pen = epa->normal * epa->depth;
const auto pen = epa->penetration_vector;
Mesh b_plus = b;
b_plus.set_origin(b_plus.get_origin() + pen * margin);
@@ -133,12 +133,8 @@ TEST(UnitTestEpa, TestCollisionTrue2)
EXPECT_NEAR(epa->normal.y, 0.0f, 1e-3f);
EXPECT_NEAR(epa->normal.z, 0.0f, 1e-3f);
// Choose a deterministic sign: orient penetration from A toward B
const auto centers = b.get_origin() - a.get_origin(); // (0.5, 0, 0)
float sign = (epa->normal.dot(centers) >= 0.0f) ? +1.0f : -1.0f;
constexpr float margin = 1.0f + 1e-3f; // tiny slack to avoid grazing
const auto pen = epa->normal * epa->depth * sign;
const auto pen = epa->normal * epa->depth;
// Apply once: B + pen must separate; the opposite must still collide
Mesh b_resolved = b;