Glossary of Special Terms

Alpha Channel - Alpha channel is black & white image which tells what parts of the image are transparent. Black areas are completely transparent whereas white areas are totally opaque. Shades of grey describe partial transparency.

Ambient - Surface color where no direct light is hit, called also as shadow side color.

Block - Group of objects. Block can contain any number of objects. Block is processed as one object.

D Face / Face - Surface between three vertices. Faces are also called triangles. 

Dialog - A window to which the user is supposed to react.

Diffuse - Surface color where direct light hits. This is the most dominant color.

Drawing units - The base units used in the AutoCAD drawing. Usually meters.

Emission - Color that is multiplied with other colors. Generally 0,0,0 but can be used to make a fluorescent effect.

Framerate - Number of frames (pictures) per second.

Gouraud - Type of OpenGL shading.

Grid - Even pattern of elements (points etc.) forming square shapes.

Interpolation - In MAGNET Modeler interpolation means attaching elements automatically on the surface of certain object, usually on the ground.

Material - Material of an element. Material defines the characteristics of the surface of the element. For example texture and transparency are defined as a "Material".

Mesh - An object consisting of 3D faces.

OpenGL - Industry's most widely used and supported 2D and 3D graphics application programming interface (API).

Orthophoto - Photo taken perpendicularly to the object. Usually aerial photo or satellite photo.

Polyline - Line with two or more vertices.

Rendering - Creating a 2-dimensional image or set of images (for moving picture) of the 3-dimensional model from a specified view point.

Shading - Processing the effects of light.

Shininess - Scope of the reflection of the light source.

Specular - Intensity and color of the reflection of the light source.

Surface Model / Terrain Model - 3D Terrain which consists of 3D faces.

Texboard - A billboard-like object in the model that has a certain texture assigned to it. It can be "rotating" i.e. it always faces towards the viewer. This is useful for modeling 3D objects, such as trees. A texboard may also have partially transparent texture, which is useful for modeling non-rectangular objects, such as traffic signs.

Texture - Picture used on the surface of 3D object.

Texturing - The way of placing texture on the surface of 3D object.

Tooltip - Small box of information appearing when cursor is placed on top of certain object.

Triangle - Surface between three vertices. Triangles are also called 3D faces or faces.

Vertex - A specific point in 3D space. Vertex is the corner point of polyline, 3D face or other 3D element.

Topic - A point in space from which the view is seen.

Viewport - Means window or area with certain view.

Wireframe - Rendering process which shows only all edges.

VRML - Virtual Reality Modeling Language. Industry standard language for 3D in web.