added files

CMakeLists.txt

@@ -34,6 +34,8 @@ option(OMATH_ENABLE_FORCE_INLINE
 
 option(OMATH_ENABLE_LUA
         "omath bindings for lua" OFF)
+option(OMATH_ENABLE_PHYSX
+        "PhysX-backed collider implementations" OFF)
 if(VCPKG_MANIFEST_FEATURES)
     foreach(omath_feature IN LISTS VCPKG_MANIFEST_FEATURES)
         if(omath_feature STREQUAL "imgui")
@@ -48,6 +50,8 @@ if(VCPKG_MANIFEST_FEATURES)
             set(OMATH_BUILD_EXAMPLES ON)
         elseif(omath_feature STREQUAL "lua")
             set(OMATH_ENABLE_LUA ON)
+        elseif(omath_feature STREQUAL "physx")
+            set(OMATH_ENABLE_PHYSX ON)
         endif()
 
     endforeach()
@@ -78,6 +82,7 @@ if(${PROJECT_IS_TOP_LEVEL})
     message(STATUS "[${PROJECT_NAME}]: Coverage feature status ${OMATH_ENABLE_COVERAGE}")
     message(STATUS "[${PROJECT_NAME}]: Valgrind feature status ${OMATH_ENABLE_VALGRIND}")
     message(STATUS "[${PROJECT_NAME}]: Lua feature status ${OMATH_ENABLE_LUA}")
+    message(STATUS "[${PROJECT_NAME}]: PhysX feature status ${OMATH_ENABLE_PHYSX}")
 endif()
 
 file(GLOB_RECURSE OMATH_SOURCES CONFIGURE_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/source/*.cpp")
@@ -100,6 +105,13 @@ if (OMATH_ENABLE_LUA)
     target_include_directories(${PROJECT_NAME} PRIVATE ${SOL2_INCLUDE_DIRS})
 endif ()
 
+if (OMATH_ENABLE_PHYSX)
+    target_compile_definitions(${PROJECT_NAME} PUBLIC OMATH_ENABLE_PHYSX)
+
+    find_package(unofficial-omniverse-physx-sdk CONFIG REQUIRED)
+    target_link_libraries(${PROJECT_NAME} PUBLIC unofficial::omniverse-physx-sdk::sdk)
+endif ()
+
 add_library(${PROJECT_NAME}::${PROJECT_NAME} ALIAS ${PROJECT_NAME})
 
 target_compile_definitions(${PROJECT_NAME} PUBLIC OMATH_VERSION="${PROJECT_VERSION}")

CMakePresets.json

@@ -145,7 +145,7 @@
       "hidden": true,
       "inherits": ["linux-base", "vcpkg-base"],
       "cacheVariables": {
-        "VCPKG_MANIFEST_FEATURES": "tests;imgui;avx2;lua"
+        "VCPKG_MANIFEST_FEATURES": "tests;imgui;avx2;lua;physx"
       }
     },
     {

include/omath/collision/physx_box_collider.hpp

@@ -0,0 +1,59 @@
+//
+// Created by orange-cpp
+//
+#pragma once
+
+#ifdef OMATH_ENABLE_PHYSX
+
+#include "collider_interface.hpp"
+#include <PxPhysicsAPI.h>
+
+namespace omath::collision
+{
+    /// Axis-aligned box collider backed by PhysX PxBoxGeometry.
+    /// Half-extents are stored in PhysX convention (positive values along each axis).
+    class PhysXBoxCollider final : public ColliderInterface<Vector3<float>>
+    {
+    public:
+        /// @param half_extents  Half-widths along X, Y and Z axes (all must be > 0).
+        /// @param origin        World-space centre of the box.
+        explicit PhysXBoxCollider(const VectorType& half_extents, const VectorType& origin = {})
+            : m_geometry(physx::PxVec3(half_extents.x, half_extents.y, half_extents.z))
+            , m_origin(origin)
+        {
+        }
+
+        /// Support function: returns the world-space point on the box furthest in @p direction.
+        /// For a box, the furthest point along d is origin + (sign(d.x)*hx, sign(d.y)*hy, sign(d.z)*hz).
+        [[nodiscard]]
+        VectorType find_abs_furthest_vertex_position(const VectorType& direction) const override
+        {
+            const auto& he = m_geometry.halfExtents;
+            return {
+                m_origin.x + (direction.x >= 0.f ? he.x : -he.x),
+                m_origin.y + (direction.y >= 0.f ? he.y : -he.y),
+                m_origin.z + (direction.z >= 0.f ? he.z : -he.z),
+            };
+        }
+
+        [[nodiscard]]
+        const VectorType& get_origin() const override { return m_origin; }
+
+        void set_origin(const VectorType& new_origin) override { m_origin = new_origin; }
+
+        [[nodiscard]]
+        const physx::PxBoxGeometry& get_geometry() const { return m_geometry; }
+
+        /// Update half-extents at runtime.
+        void set_half_extents(const VectorType& half_extents)
+        {
+            m_geometry = physx::PxBoxGeometry(physx::PxVec3(half_extents.x, half_extents.y, half_extents.z));
+        }
+
+    private:
+        physx::PxBoxGeometry m_geometry;
+        VectorType m_origin;
+    };
+} // namespace omath::collision
+
+#endif // OMATH_ENABLE_PHYSX

include/omath/collision/physx_sphere_collider.hpp

@@ -0,0 +1,64 @@
+//
+// Created by orange-cpp
+//
+#pragma once
+
+#ifdef OMATH_ENABLE_PHYSX
+
+#include "collider_interface.hpp"
+#include <PxPhysicsAPI.h>
+#include <cmath>
+
+namespace omath::collision
+{
+    /// Sphere collider backed by PhysX PxSphereGeometry.
+    class PhysXSphereCollider final : public ColliderInterface<Vector3<float>>
+    {
+    public:
+        /// @param radius  Sphere radius (must be > 0).
+        /// @param origin  World-space centre of the sphere.
+        explicit PhysXSphereCollider(float radius, const VectorType& origin = {})
+            : m_geometry(radius)
+            , m_origin(origin)
+        {
+        }
+
+        /// Support function: returns the world-space point on the sphere furthest in @p direction.
+        /// For a sphere that is simply origin + normalize(direction) * radius.
+        [[nodiscard]]
+        VectorType find_abs_furthest_vertex_position(const VectorType& direction) const override
+        {
+            const float len = std::sqrt(direction.x * direction.x +
+                                        direction.y * direction.y +
+                                        direction.z * direction.z);
+            if (len == 0.f)
+                return m_origin;
+
+            const float inv = m_geometry.radius / len;
+            return {
+                m_origin.x + direction.x * inv,
+                m_origin.y + direction.y * inv,
+                m_origin.z + direction.z * inv,
+            };
+        }
+
+        [[nodiscard]]
+        const VectorType& get_origin() const override { return m_origin; }
+
+        void set_origin(const VectorType& new_origin) override { m_origin = new_origin; }
+
+        [[nodiscard]]
+        const physx::PxSphereGeometry& get_geometry() const { return m_geometry; }
+
+        [[nodiscard]]
+        float get_radius() const { return m_geometry.radius; }
+
+        void set_radius(float radius) { m_geometry = physx::PxSphereGeometry(radius); }
+
+    private:
+        physx::PxSphereGeometry m_geometry;
+        VectorType m_origin;
+    };
+} // namespace omath::collision
+
+#endif // OMATH_ENABLE_PHYSX

tests/general/unit_test_physx_colliders.cpp

@@ -0,0 +1,247 @@
+//
+// Created by orange-cpp
+//
+#ifdef OMATH_ENABLE_PHYSX
+
+#include <gtest/gtest.h>
+#include <omath/collision/gjk_algorithm.hpp>
+#include <omath/collision/physx_box_collider.hpp>
+#include <omath/collision/physx_sphere_collider.hpp>
+
+using namespace omath::collision;
+using omath::Vector3;
+
+// ─── PhysXBoxCollider ────────────────────────────────────────────────────────
+
+TEST(PhysXBoxCollider, DefaultOriginIsZero)
+{
+    PhysXBoxCollider box({1.f, 1.f, 1.f});
+    EXPECT_EQ(box.get_origin(), Vector3<float>(0.f, 0.f, 0.f));
+}
+
+TEST(PhysXBoxCollider, SetAndGetOrigin)
+{
+    PhysXBoxCollider box({1.f, 1.f, 1.f}, {3.f, 4.f, 5.f});
+    EXPECT_EQ(box.get_origin(), Vector3<float>(3.f, 4.f, 5.f));
+
+    box.set_origin({-1.f, 0.f, 2.f});
+    EXPECT_EQ(box.get_origin(), Vector3<float>(-1.f, 0.f, 2.f));
+}
+
+TEST(PhysXBoxCollider, FurthestPointPositiveDirection)
+{
+    // Box centred at origin with half-extents (2, 3, 4).
+    // Direction (+x, +y, +z) → furthest corner is (+2, +3, +4).
+    PhysXBoxCollider box({2.f, 3.f, 4.f});
+    const auto p = box.find_abs_furthest_vertex_position({1.f, 1.f, 1.f});
+    EXPECT_FLOAT_EQ(p.x, 2.f);
+    EXPECT_FLOAT_EQ(p.y, 3.f);
+    EXPECT_FLOAT_EQ(p.z, 4.f);
+}
+
+TEST(PhysXBoxCollider, FurthestPointNegativeDirection)
+{
+    // Direction (-x, -y, -z) → furthest corner is (-2, -3, -4).
+    PhysXBoxCollider box({2.f, 3.f, 4.f});
+    const auto p = box.find_abs_furthest_vertex_position({-1.f, -1.f, -1.f});
+    EXPECT_FLOAT_EQ(p.x, -2.f);
+    EXPECT_FLOAT_EQ(p.y, -3.f);
+    EXPECT_FLOAT_EQ(p.z, -4.f);
+}
+
+TEST(PhysXBoxCollider, FurthestPointMixedDirection)
+{
+    // Direction (+x, -y, +z) → furthest corner is (+2, -3, +4).
+    PhysXBoxCollider box({2.f, 3.f, 4.f});
+    const auto p = box.find_abs_furthest_vertex_position({1.f, -1.f, 1.f});
+    EXPECT_FLOAT_EQ(p.x,  2.f);
+    EXPECT_FLOAT_EQ(p.y, -3.f);
+    EXPECT_FLOAT_EQ(p.z,  4.f);
+}
+
+TEST(PhysXBoxCollider, FurthestPointWithNonZeroOrigin)
+{
+    // Box at (10, 0, 0), half-extents (1, 1, 1). Direction +x → (11, 1, 1).
+    PhysXBoxCollider box({1.f, 1.f, 1.f}, {10.f, 0.f, 0.f});
+    const auto p = box.find_abs_furthest_vertex_position({1.f, 1.f, 1.f});
+    EXPECT_FLOAT_EQ(p.x, 11.f);
+    EXPECT_FLOAT_EQ(p.y,  1.f);
+    EXPECT_FLOAT_EQ(p.z,  1.f);
+}
+
+TEST(PhysXBoxCollider, SetHalfExtentsUpdatesGeometry)
+{
+    PhysXBoxCollider box({1.f, 1.f, 1.f});
+    box.set_half_extents({5.f, 6.f, 7.f});
+
+    const auto& he = box.get_geometry().halfExtents;
+    EXPECT_FLOAT_EQ(he.x, 5.f);
+    EXPECT_FLOAT_EQ(he.y, 6.f);
+    EXPECT_FLOAT_EQ(he.z, 7.f);
+
+    // Furthest vertex must reflect the new extents.
+    const auto p = box.find_abs_furthest_vertex_position({1.f, 1.f, 1.f});
+    EXPECT_FLOAT_EQ(p.x, 5.f);
+    EXPECT_FLOAT_EQ(p.y, 6.f);
+    EXPECT_FLOAT_EQ(p.z, 7.f);
+}
+
+// ─── PhysXSphereCollider ─────────────────────────────────────────────────────
+
+TEST(PhysXSphereCollider, DefaultOriginIsZero)
+{
+    PhysXSphereCollider sphere(1.f);
+    EXPECT_EQ(sphere.get_origin(), Vector3<float>(0.f, 0.f, 0.f));
+}
+
+TEST(PhysXSphereCollider, SetAndGetOrigin)
+{
+    PhysXSphereCollider sphere(1.f, {1.f, 2.f, 3.f});
+    EXPECT_EQ(sphere.get_origin(), Vector3<float>(1.f, 2.f, 3.f));
+
+    sphere.set_origin({-5.f, 0.f, 0.f});
+    EXPECT_EQ(sphere.get_origin(), Vector3<float>(-5.f, 0.f, 0.f));
+}
+
+TEST(PhysXSphereCollider, FurthestPointAlongPureXAxis)
+{
+    // Direction (1,0,0), radius 3 → furthest point is (3, 0, 0).
+    PhysXSphereCollider sphere(3.f);
+    const auto p = sphere.find_abs_furthest_vertex_position({1.f, 0.f, 0.f});
+    EXPECT_FLOAT_EQ(p.x, 3.f);
+    EXPECT_FLOAT_EQ(p.y, 0.f);
+    EXPECT_FLOAT_EQ(p.z, 0.f);
+}
+
+TEST(PhysXSphereCollider, FurthestPointAlongDiagonal)
+{
+    // Direction (1,1,0), radius 1 → furthest point at distance 1 from origin.
+    PhysXSphereCollider sphere(1.f);
+    const auto p = sphere.find_abs_furthest_vertex_position({1.f, 1.f, 0.f});
+    const float dist = std::sqrt(p.x * p.x + p.y * p.y + p.z * p.z);
+    EXPECT_NEAR(dist, 1.f, 1e-5f);
+}
+
+TEST(PhysXSphereCollider, FurthestPointWithNonZeroOrigin)
+{
+    // Sphere at (5, 0, 0), radius 2. Direction +x → (7, 0, 0).
+    PhysXSphereCollider sphere(2.f, {5.f, 0.f, 0.f});
+    const auto p = sphere.find_abs_furthest_vertex_position({1.f, 0.f, 0.f});
+    EXPECT_FLOAT_EQ(p.x, 7.f);
+    EXPECT_FLOAT_EQ(p.y, 0.f);
+    EXPECT_FLOAT_EQ(p.z, 0.f);
+}
+
+TEST(PhysXSphereCollider, ZeroDirectionReturnsOrigin)
+{
+    PhysXSphereCollider sphere(5.f, {1.f, 2.f, 3.f});
+    const auto p = sphere.find_abs_furthest_vertex_position({0.f, 0.f, 0.f});
+    EXPECT_EQ(p, sphere.get_origin());
+}
+
+TEST(PhysXSphereCollider, SetRadiusUpdatesGeometry)
+{
+    PhysXSphereCollider sphere(1.f);
+    sphere.set_radius(10.f);
+    EXPECT_FLOAT_EQ(sphere.get_radius(), 10.f);
+
+    // Furthest point along +x should now be at x = 10.
+    const auto p = sphere.find_abs_furthest_vertex_position({1.f, 0.f, 0.f});
+    EXPECT_FLOAT_EQ(p.x, 10.f);
+}
+
+// ─── GJK: Box vs Box ─────────────────────────────────────────────────────────
+
+using GjkBox    = omath::collision::GjkAlgorithm<PhysXBoxCollider>;
+using GjkSphere = omath::collision::GjkAlgorithm<PhysXSphereCollider>;
+
+TEST(PhysXBoxGjk, CollidingOverlap)
+{
+    // Two unit boxes: A at origin, B shifted by 0.5 — clearly overlapping.
+    const PhysXBoxCollider a({1.f, 1.f, 1.f});
+    const PhysXBoxCollider b({1.f, 1.f, 1.f}, {0.5f, 0.f, 0.f});
+    EXPECT_TRUE(GjkBox::is_collide(a, b));
+}
+
+TEST(PhysXBoxGjk, CollidingTouching)
+{
+    // Boxes exactly touching on the +X face: A[-1,1] and B[1,3] along X.
+    const PhysXBoxCollider a({1.f, 1.f, 1.f});
+    const PhysXBoxCollider b({1.f, 1.f, 1.f}, {2.f, 0.f, 0.f});
+    EXPECT_TRUE(GjkBox::is_collide(a, b));
+}
+
+TEST(PhysXBoxGjk, NotCollidingSeparated)
+{
+    // Boxes separated by a gap: A[-1,1] and B[3,5] along X.
+    const PhysXBoxCollider a({1.f, 1.f, 1.f});
+    const PhysXBoxCollider b({1.f, 1.f, 1.f}, {4.f, 0.f, 0.f});
+    EXPECT_FALSE(GjkBox::is_collide(a, b));
+}
+
+TEST(PhysXBoxGjk, CollidingSameOrigin)
+{
+    // Same position — fully overlapping.
+    const PhysXBoxCollider a({1.f, 1.f, 1.f});
+    const PhysXBoxCollider b({1.f, 1.f, 1.f});
+    EXPECT_TRUE(GjkBox::is_collide(a, b));
+}
+
+TEST(PhysXBoxGjk, NotCollidingDiagonalSeparation)
+{
+    // Boxes separated along a diagonal so no axis-aligned faces overlap.
+    const PhysXBoxCollider a({1.f, 1.f, 1.f});
+    const PhysXBoxCollider b({1.f, 1.f, 1.f}, {3.f, 3.f, 3.f});
+    EXPECT_FALSE(GjkBox::is_collide(a, b));
+}
+
+TEST(PhysXBoxGjk, DifferentSizesColliding)
+{
+    // Large box vs small box inside it.
+    const PhysXBoxCollider large({5.f, 5.f, 5.f});
+    const PhysXBoxCollider small_box({1.f, 1.f, 1.f}, {2.f, 0.f, 0.f});
+    EXPECT_TRUE(GjkBox::is_collide(large, small_box));
+}
+
+// ─── GJK: Sphere vs Sphere ───────────────────────────────────────────────────
+
+TEST(PhysXSphereGjk, CollidingOverlap)
+{
+    // Radii 1 each, centres 1 apart — overlapping.
+    const PhysXSphereCollider a(1.f);
+    const PhysXSphereCollider b(1.f, {1.f, 0.f, 0.f});
+    EXPECT_TRUE(GjkSphere::is_collide(a, b));
+}
+
+TEST(PhysXSphereGjk, CollidingSameOrigin)
+{
+    const PhysXSphereCollider a(1.f);
+    const PhysXSphereCollider b(1.f);
+    EXPECT_TRUE(GjkSphere::is_collide(a, b));
+}
+
+TEST(PhysXSphereGjk, NotCollidingSeparated)
+{
+    // Radii 1 each, centres 3 apart — gap of 1.
+    const PhysXSphereCollider a(1.f);
+    const PhysXSphereCollider b(1.f, {3.f, 0.f, 0.f});
+    EXPECT_FALSE(GjkSphere::is_collide(a, b));
+}
+
+TEST(PhysXSphereGjk, DifferentRadiiColliding)
+{
+    // r=2 and r=1, centres 2.5 apart — still overlapping.
+    const PhysXSphereCollider a(2.f);
+    const PhysXSphereCollider b(1.f, {2.5f, 0.f, 0.f});
+    EXPECT_TRUE(GjkSphere::is_collide(a, b));
+}
+
+TEST(PhysXSphereGjk, DifferentRadiiNotColliding)
+{
+    // r=1 and r=1, centres 5 apart — separated.
+    const PhysXSphereCollider a(1.f);
+    const PhysXSphereCollider b(1.f, {5.f, 0.f, 0.f});
+    EXPECT_FALSE(GjkSphere::is_collide(a, b));
+}
+
+#endif // OMATH_ENABLE_PHYSX

vcpkg-configuration.json

@@ -1,7 +1,7 @@
 {
   "default-registry": {
     "kind": "git",
-    "baseline": "b1b19307e2d2ec1eefbdb7ea069de7d4bcd31f01",
+    "baseline": "efa4634bd526b87559684607d2cbbdeeec0f07d8",
     "repository": "https://github.com/microsoft/vcpkg"
   },
   "registries": [

vcpkg.json

@@ -52,6 +52,13 @@
         "lua",
         "sol2"
       ]
+    },
+    "physx": {
+      "description": "PhysX-backed collider implementations",
+      "dependencies": [
+        "physx"
+      ],
+      "supports": "(windows & x64 & !mingw & !uwp) | (linux & x64) | (linux & arm64)"
     }
   }
 }