Hình Cơ Bản -- Primitives¶

Tham Chiếu -- Reference

Chế Độ -- Mode: Chế Độ Vật Thể và Chế Độ Biên Soạn -- Object Mode and Edit Mode
Trình Đơn -- Menu: Add ‣ Curve
Phím Tắt -- Hotkey: Shift-A

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When adding curves there are some common options like other Objects.

In Object/Edit Mode, the Add Surface menu, provides six different surface primitives:

NURBS surface primitives.¶

NURBS curve primitives.¶

NURBS Curve¶

Adds a generic curve of four control points forming an arc.

Adds an a closed loop of control point forming a circle. Note, a circle NURBS surface is never filled, unlike its "real" curve counterpart...

Adds a generic surface patch consisting of a 4×4 grid plane with the center grid slightly raised.

Adds an open end cylinder, consisting of an extruded NURBS Circle.

Adds a generic sphere constructed by revolving a grid of control points about an axis.

Adds a doughnut-shaped primitive created by rotating a circle around an axis.