Method getArea

core/2d/AutoPolygon.cpp:159–172

}

float PolygonInfo::getArea() const
{
    float area              = 0;
    V3F_C4B_T2F* verts      = triangles.verts;
    unsigned short* indices = triangles.indices;
    for (unsigned int i = 0; i < triangles.indexCount; i += 3)
    {
        auto A = verts[indices[i]].vertices;
        auto B = verts[indices[i + 1]].vertices;
        auto C = verts[indices[i + 2]].vertices;
        area += (A.x * (B.y - C.y) + B.x * (C.y - A.y) + C.x * (A.y - B.y)) / 2;
    }
    return area;
}

AutoPolygon::AutoPolygon(std::string_view filename)
    : _image(nullptr), _data(nullptr), _filename(""), _width(0), _height(0), _scaleFactor(0)