1 files changed, 21 insertions, 0 deletions
diff --git a/src/o3d/deriv_vertex.hpp b/src/o3d/deriv_vertex.hpp
new file mode 100644
index 0000000..bc47780
--- /dev/null
+++ b/src/o3d/deriv_vertex.hpp
@@ -0,0 +1,21 @@
+#ifndef O3D_DERIV_VERTEX_H
+#define O3D_DERIV_VERTEX_H
+
+#include "math/vector.hpp"
+
+namespace engine::o3d {
+
+using engine::math::Vector4;
+
+struct DerivedVertex {
+    Vector4 vertex;
+    float b0, b1;
+
+    constexpr DerivedVertex div_by_w() const & {
+        return {vertex.div_by_w(), b0, b1};
+    }
+};
+
+}
+
+#endif // O3D_DERIV_VERTEX_H