Unit 66 3D Modelling Exercise

Unit 66

3D Modelling

Displaying 3D Polygon Animations:

Application Programming Interface - a computer application that able you to render 3D graphics, an example of an API is Direct3D and OpenGL

Graphics Pipeline - refers to the sequence of steps used to create a 2D raster representation of a 3D scene.

Rendering Engine - he rendering engine does the rendering via the chosen method (rasterization, ray-tracing or any different technique).

Shadowing - a process by which shadows are added to 3D computer graphics.

Vertex and Pixel Shaders - a computer program that is used to do shading: the production of appropriate levels of color within an image, or, in the modern era, also to produce special effects or do video post-processing

Level of Detail - involves decreasing the complexity of a 3D object representation as it moves away from the viewer or according to other metrics such as object importance, viewpoint-relative speed or position

Geometric Theory:

Vertices - a kind of point that describes the corners or intersections of geometric shapes.

Lines - A line segment is a part of a line that is bounded by two distinct end points and contains every point on the line between its endpoints.

Curves - a curve is a set of points which, near each of its points, looks like a line, up to a deformation.

Polygons - A polygon is any 2-dimensional shape formed with straight lines. Triangles, quadrilaterals, pentagons, and hexagons are all examples of polygons.

Element - an element, or member, of a set is any one of the distinct objects that make up that set.

Face - a face is a flat surface that forms part of the boundary of a solid object; a three-dimensional solid bounded exclusively by flat faces is a polyhedron.

Primitives - used in various senses, with the common meaning of the simplest geometric objects that the system can handle (draw, store).

Meshes - is the practice of generating a polygonal or polyhedral mesh that approximates a geometric domain.

Coordinate Geometry - the study of algebraic equations on graphs. An example of coordinate geometry is plotting points, lines and curves on an x and y axis.

Surfaces - a surface is a two-dimensional, topological manifold.

Mesh Construction

Box Modelling  - a technique in 3D modeling where a primitive shape (such as a box, cylinder, sphere, etc.) is used to make the basic shape of the final model. This basic shape is then used to sculpt out the final model.

Extrusion modelling - the user creates a 2D shape which traces the outline of an object from a photograph or a drawing.

3D Development Softwares

Software, for example 3D Studio Max, Maya, Lightwave, AutoCAD, Cinema 4D, 
File formats, for example 3ds, .mb, .lwo, .C4d, and plug-ins.

Constraints

Polygon Count - The polygon count refers to the number of polygons being rendered per frame.

File Size - measures the size of a computer file. Typically it is measured in bytes or bits. The actual amount of disk space consumed by the file depends on the file system.

Rendering Time - is one of the interactive areas of computer graphics, it means creating synthetic images fast enough on the computer so that the viewer can interact with a virtual environment.