This page is not available in the language you have chosen. It will be displayed in English by default. If you would like to view it in a different language, you can try selecting another language.
Spaces
| Space in Unreal | Other Names | Description |
|---|---|---|
| Tangent | Orthogonal (can deviate after interpolation), can be left or right handed. The TangentToLocal transform contains rotation only, so it is OrthoNormal (can be inverted by transposing). | |
| Local | Object Space | Orthogonal, can be left or right handed (triangle cull order needs adjustment). The LocalToWorld transform contains rotation, non-uniform scaling (including negative non-uniform scaling which can change the winding order), and translation. |
| World | The WorldToView transform contains only rotation and translation, so distances in View space are the same as in World space. | |
| TranslatedWorld |
Translated matrices are used to remove camera position from the combined transform matrices, which improves precision when transforming vertices. |
|
| View | CameraSpace | The ViewToClip transform contains scale on x and y, but no translation (which would be an off center projection). It scales and translates z. It also applies a projection to convert into the homogeneous ClipSpace. |
| Clip | HomogeniousCoordinates, PostProjectionSpace, ProjectionSpace | After the perspective projection matrix was applied. Note that W in Clip space is the same as View Space Z. |
| Screen | NormalizedDeviceCoordinates from OpenGL | After the perspective divide:
|
| Viewport | ViewportCoordinates, WindowCoordinates | In pixels :
|
Space Transformations
Transformation between spaces should always be named using the form X To Y.
Examples:
- WorldToView
- TranslatedWorldToView
- TangentToWorld