Figure.cpp

//
// Created by kobedb on 20.05.22.
//

#include "Figure.h"

using namespace std;

namespace KDBRenderUtils
{
    void Figure::triangulate() {
        vector<Face> triangle_faces;
        triangle_faces.reserve(faces.size());
        for(const Face& f : faces) {
            if(f.point_indexes.size() <= 3) {
                triangle_faces.push_back(f);
                continue;
            }
            for(vector<Face>::size_type i = 1; i < f.point_indexes.size()-1; i++) {
                triangle_faces.push_back(Face{{f.point_indexes[0], f.point_indexes[i], f.point_indexes[i+1]}});
            }
        }
        faces = triangle_faces;
    }

    void Figure::addFigure(const Figure& fig)
    {
        int vertices_offset = vertices.size();
        vertices.insert(vertices.begin(), fig.vertices.begin(), fig.vertices.end());
        for(const auto& f : fig.faces) {
            Face updatedFace;
            for(int i : f.point_indexes) {
                updatedFace.point_indexes.push_back(i+vertices_offset);
            }
            faces.push_back(updatedFace);
        }
    }

    void applyTransformation(Figure& fig, const Matrix& m)
    {
        for(Vector3D& vert : fig.vertices) {
            vert = vert * m;
        }
    }
} // KDBRenderUtils