1 files changed, 25 insertions, 0 deletions
diff --git a/src/o3d/tri_deriv.hpp b/src/o3d/tri_deriv.hpp
new file mode 100644
index 0000000..f82bd9b
--- /dev/null
+++ b/src/o3d/tri_deriv.hpp
@@ -0,0 +1,25 @@
+#ifndef O3D_TRI_VERTEX_H
+#define O3D_TRI_VERTEX_H
+
+#include <vector>
+#include "o3d/vertex.hpp"
+#include "o3d/deriv_vertex.hpp"
+
+namespace engine::o3d {
+
+struct TriangleDerived {
+    DerivedVertex derived_vertex1;
+    DerivedVertex derived_vertex2;
+    DerivedVertex derived_vertex3;
+
+    std::vector<TriangleDerived> perspective_crop_xy_out(float x1, float x2, float y1, float y2) const;
+    std::vector<TriangleDerived> crop_z_out(float z1, float z2) const;
+
+    constexpr TriangleDerived div_by_w() const & {
+        return {derived_vertex1.div_by_w(), derived_vertex2.div_by_w(), derived_vertex3.div_by_w()};
+    }
+};
+
+}
+
+#endif // O3D_TRI_VERTEX_H