ParkerBritt/Enzo
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

feat: add cgal and viewport smooth normals

Browse Source
This commit is contained in:
parker
2025-07-31 18:19:14 +01:00
parent afd3559a4d
commit 2bdada366b
5 changed files with 112 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
src/Gui/Viewport/GLMesh.cpp
View File

@@ -2,6 +2,8 @@
#include <GL/gl.h>
#include <iostream>
#include "Engine/Operator/AttributeHandle.h"
#include "Engine/Operator/Geometry.h"
#include <CGAL/Polygon_mesh_processing/compute_normal.h>
@@ -55,14 +57,34 @@ void GLMesh::setPosBuffer(enzo::geo::Geometry& geometry)
glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
vertices.clear();
std::shared_ptr<enzo::ga::Attribute> PAttr = geometry.getAttribByName(enzo::ga::AttrOwner::POINT, "P");
enzo::ga::AttributeHandleVector3 PAttrHandle = enzo::ga::AttributeHandleVector3(PAttr);
auto pointPositions = PAttrHandle.getAllValues();
enzo::geo::HeMesh heMesh = geometry.computeHalfEdgeMesh();
for(auto position : pointPositions)
// compute mesh normals
auto vnormals = heMesh.add_property_map<enzo::geo::V_index, enzo::geo::Vector>("v:normals", CGAL::NULL_VECTOR).first;
auto fnormals = heMesh.add_property_map<enzo::geo::F_index, enzo::geo::Vector>("f:normals", CGAL::NULL_VECTOR).first;
namespace PMP = CGAL::Polygon_mesh_processing;
PMP::compute_normals(
heMesh,
vnormals,
fnormals,
PMP::parameters::vertex_point_map(heMesh.points())
);
for (enzo::geo::V_index v : heMesh.vertices())
{
vertices.push_back({{position.x(), position.y(), position.z()}, {position.x(), position.y(), position.z()}});
std::cout << position.x() << " " << position.y() << " " << position.z() << "\n";
const enzo::geo::Point &p = heMesh.point(v);
const enzo::geo::Vector &n = vnormals[v];
vertices.push_back({
{ p.x(),
p.y(),
p.z()},
{ n.x(),
n.y(),
n.z()}
});
}
glBufferData(GL_ARRAY_BUFFER, vertices.size()*sizeof(Vertex), vertices.data(), GL_STATIC_DRAW);