try fix mingw32

Author: luadebug

include/omath/projection/camera.hpp

@@ -8,6 +8,7 @@
 #include "omath/linear_algebra/triangle.hpp"
 #include "omath/linear_algebra/vector3.hpp"
 #include "omath/projection/error_codes.hpp"
+#include <cmath>
 #include <expected>
 #include <omath/trigonometry/angle.hpp>
 #include <type_traits>
@@ -229,10 +230,12 @@ namespace omath::projection
             auto projected = get_view_projection_matrix()
                              * mat_column_from_vector<float, Mat4X4Type::get_store_ordering()>(world_position);
 
-            if (projected.at(3, 0) == 0.0f)
+            constexpr float w_epsilon = 1e-6f;
+            const auto w = projected.at(3, 0);
+            if (std::abs(w) < w_epsilon)
                 return std::unexpected(Error::WORLD_POSITION_IS_OUT_OF_SCREEN_BOUNDS);
 
-            projected /= projected.at(3, 0);
+            projected /= w;
 
             if (is_ndc_out_of_bounds(projected))
                 return std::unexpected(Error::WORLD_POSITION_IS_OUT_OF_SCREEN_BOUNDS);
@@ -250,10 +253,12 @@ namespace omath::projection
             auto inverted_projection =
                     inv_view_proj.value() * mat_column_from_vector<float, Mat4X4Type::get_store_ordering()>(ndc);
 
-            if (!inverted_projection.at(3, 0))
+            constexpr float w_epsilon = 1e-6f;
+            const auto w = inverted_projection.at(3, 0);
+            if (std::abs(w) < w_epsilon)
                 return std::unexpected(Error::WORLD_POSITION_IS_OUT_OF_SCREEN_BOUNDS);
 
-            inverted_projection /= inverted_projection.at(3, 0);
+            inverted_projection /= w;
 
             return Vector3<float>{inverted_projection.at(0, 0), inverted_projection.at(1, 0),
                                   inverted_projection.at(2, 0)};