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The OBJ file format is a simple data-format that represents 3D geometry alone — namely, the position of each vertex, the UV position of each texture coordinate vertex, vertex normals, and the faces that make each polygon defined as a list of vertices, and texture vertices. Vertices are stored in a counter-clockwise order by default, making ...
Texture coordinates Also known as UV coordinates, these control the texture mapping of the surface, possibly for multiple layers. normal vectors These define an approximated curved surface at the location of the vertex, used for lighting calculations (such as Phong shading), normal mapping, or displacement mapping, and to control subdivision.
Morph target animation, per-vertex animation, shape interpolation, shape keys, or blend shapes [1] is a method of 3D computer animation used together with techniques such as skeletal animation. In a morph target animation, a "deformed" version of a mesh is stored as a series of vertex positions.
This means a shared spatial vertex position can have different UV coordinates for each of its triangles, so adjacent triangles can be cut apart and positioned on different areas of the texture map. The UV mapping process at its simplest requires three steps: unwrapping the mesh, creating the texture, and applying the texture to a respective ...
Skeletal animation; Built-in collision detection and simple Physics engine; Dynamic light support; System to create and use custom shaders and materials based on the OpenGL Shading Language (GLSL) Impostors like Billboards and Skyboxes; Paths and Splines; Behavior and Action system; Texture animation; Vertex color support
A simple tessellation pipeline rendering a smooth sphere from a crude cubic vertex set using a subdivision method. In computer graphics, tessellation is the dividing of datasets of polygons (sometimes called vertex sets) presenting objects in a scene into suitable structures for rendering.
vertex A position (usually in 3D space) along with other information such as color, normal vector and texture coordinates. edge A connection between two vertices. face A closed set of edges, in which a triangle face has three edges, and a quad face has four edges. A polygon is a coplanar set of faces. In systems that support multi-sided faces ...
It is similar to a 3D paint tool but operates specifically to vertex data rather than texture maps. It is most often used for modifying weight maps for skeletal animation , to tweak the influence of individual bones when deforming surfaces around joints.