The following statements are supported by OrcaFlex: mtllib filename

These definitions may be grouped into subsets for the purpose of applying named material properties and for selection purposes when edited in a 3D software package. obj file defines the mesh vertices, normals, texture vertices and faces for a model. mtl file is optional, if no material file is used the object will be drawn in the pen colour defined by that object's drawing data in OrcaFlex. OrcaFlex supports a subset of these specifications that is sufficient for the requirements of rendering a 3D model in the shaded graphics view. A description of the file specifications are here: OBJ specification and here: MTL specification. obj file format and the associated material file (.mtl) is a commonly used interchange format for 3D meshes and their properties.

An up-to-date list of these, both commercial and free or open source, with links to their respective websites, is maintained on our own website on the shaded graphics support page. 3D modelling packagesĪ number of 3D modelling packages are available which support export in. The model can also be switched between the right or left-handed axis convention (this also modifies the face normals and winding direction to preserve the lighting and culling characteristics). If you do not know the original axis convention of the 3D model, or if the default transformation applied by OrcaFlex seems incorrect, then the shaded graphics import form allows you to apply an additional translation and rotation to the 3D model. OrcaFlex assumes that DirectX models have a left-handed coordinate convention (with the $z$-axis positive into the screen, and the $x$ and $y$ axes in the plane of the screen), and on import applies a transformation to reorient the model to the OrcaFlex coordinate system that also converts the model from left to right-handed drawing axes. The largest model that we provide is 350KB and we recommend that you avoid exceeding this size by too much, if necessary by reducing their level of detail before exporting them from the modelling software you use. These describe a surface mesh and, possibly, material (colour and texture) properties for such a model.ģD models to be imported into OrcaFlex should not contain too much detail, otherwise the drawing performance may be very poor – there are limits to the level of detail a graphics card can render efficiently. If, instead, you wish to use a detailed model of a project-specific vessel, buoy, template etc, you can import such models into OrcaFlex one of the following formats: Included with OrcaFlex installation is a collection of very basic, generic models which you are free to use. Some examples of these are shown on the OrcaFlex image gallery others, including the object data, can be found among the OrcaFlex examples. Detailed 3D models can be imported into OrcaFlex and used to represent the various model objects in shaded graphics.

Orcaflex wamit input