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Physics3D/Collider3D: Add GenerateMesh method

This commit is contained in:
Jérôme Leclercq 2021-06-20 13:35:11 +02:00
parent dbe4abefb8
commit fe06cc210d
2 changed files with 44 additions and 0 deletions
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3
include/Nazara/Physics3D/Collider3D.hpp
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@ -30,6 +30,7 @@ namespace Nz
class PrimitiveList;
class PhysWorld3D;
class StaticMesh;
class NAZARA_PHYSICS3D_API Collider3D
{
@ -48,6 +49,8 @@ namespace Nz
virtual void ForEachPolygon(const std::function<void(const Vector3f* vertices, std::size_t vertexCount)>& callback) const;
virtual std::shared_ptr<StaticMesh> GenerateMesh() const;
NewtonCollision* GetHandle(PhysWorld3D* world) const;
virtual ColliderType3D GetType() const = 0;

41
src/Nazara/Physics3D/Collider3D.cpp
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@ -5,6 +5,9 @@
#include <Nazara/Physics3D/Collider3D.hpp>
#include <Nazara/Core/PrimitiveList.hpp>
#include <Nazara/Physics3D/PhysWorld3D.hpp>
#include <Nazara/Utility/IndexBuffer.hpp>
#include <Nazara/Utility/StaticMesh.hpp>
#include <Nazara/Utility/VertexBuffer.hpp>
#include <newton/Newton.h>
#include <Nazara/Physics3D/Debug.hpp>
@ -139,6 +142,44 @@ namespace Nz
NewtonCollisionForEachPolygonDo(m_handles.begin()->second, Nz::Matrix4f::Identity(), newtCallback, const_cast<void*>(static_cast<const void*>(&callback))); //< This isn't that bad; pointer will not be used for writing
}
std::shared_ptr<StaticMesh> Collider3D::GenerateMesh() const
{
std::vector<Nz::Vector3f> colliderVertices;
std::vector<Nz::UInt16> colliderIndices;
// Generate a line list
ForEachPolygon([&](const Nz::Vector3f* vertices, std::size_t vertexCount)
{
Nz::UInt16 firstIndex = colliderVertices.size();
for (std::size_t i = 0; i < vertexCount; ++i)
colliderVertices.push_back(vertices[i]);
for (std::size_t i = 1; i < vertexCount; ++i)
{
colliderIndices.push_back(firstIndex + i - 1);
colliderIndices.push_back(firstIndex + i);
}
if (vertexCount > 2)
{
colliderIndices.push_back(firstIndex + vertexCount - 1);
colliderIndices.push_back(firstIndex);
}
});
std::shared_ptr<Nz::VertexBuffer> colliderVB = std::make_shared<Nz::VertexBuffer>(Nz::VertexDeclaration::Get(Nz::VertexLayout::XYZ), colliderVertices.size(), Nz::DataStorage::Software, 0);
colliderVB->Fill(colliderVertices.data(), 0, colliderVertices.size());
std::shared_ptr<Nz::IndexBuffer> colliderIB = std::make_shared<Nz::IndexBuffer>(false, colliderIndices.size(), Nz::DataStorage::Software, 0);
colliderIB->Fill(colliderIndices.data(), 0, colliderIndices.size());
std::shared_ptr<Nz::StaticMesh> colliderSubMesh = std::make_shared<Nz::StaticMesh>(std::move(colliderVB), std::move(colliderIB));
colliderSubMesh->GenerateAABB();
colliderSubMesh->SetPrimitiveMode(Nz::PrimitiveMode::LineList);
return colliderSubMesh;
}
NewtonCollision* Collider3D::GetHandle(PhysWorld3D* world) const
{
auto it = m_handles.find(world);