| Color | Represents a color using 4 floats (rgba), with 0-1 range. |
| Angles | Euler angles. Unlike a <see cref="T:Rotation">Rotation</see>, Euler angles can represent multiple revolutions (rotations) around an axis, but suffer from issues like gimbal lock and lack of a defined "up" vector. Use <see cref="T:Rotation">Rotation</see> for most cases. |
| BBox | An Axis Aligned Bounding Box. |
| Capsule | A capsule object, defined by 2 points and a radius. A capsule is a cylinder with round ends (inset half spheres on each end). |
| Line | Represents a line in 3D space. |
| Matrix | Represents a 4x4 matrix. |
| Ray | A struct describing an origin and direction |
| Rotation | Represents a Quaternion rotation. Can be interpreted as a direction unit vector (x,y,z) + rotation around the direction vector (w) which represents the up direction. Unlike Angles, this cannot store multiple revolutions around an axis. |
| Transform | A struct containing a position, rotation and scale. This is commonly used in engine to describe entity position, bone position and scene object position. |
| Vector2 | A 2-dimensional vector. Typically represents a position or size in 2D space. |
| Vector3 | A point in 3D space. |
| Vector4 | A 4-dimensional vector/point. |
| Sandbox.Curve | Describes a curve, which can have multiple key frames. |
| Sandbox.Frustum | Represents a frustum. |
| Sandbox.Gradient | Describes a gradient between multiple colors |
| Sandbox.Plane | Represents a plane. |
| Sandbox.Rect | Represents a rectangle. |
| Sandbox.Sphere | Represents a sphere. |
| Sandbox.Triangle |