1. A 3D projection is a mathematical process to project a series of 3D shapes to a 2D surface, usually a computer monitor.
2. Projection of a solid object is just like getting a shadow of the object on a plane.
There are two basic Projection Method:
- Parallel Projection.
- Perspective Projection.
Parallel Projection: In Parallel Projection, coordinate positions are transformed to the view plane along parallel lines. A parallel projection preserves relative proportion of objects, and this is the method used in drafting to produce scale drawing of three-dimensional objects.
Accurate views of the various sides of an object are obtained with a parallel projection, but this does not give us realistic representation of the appearance of a three dimensional object.
Perspective Projection: In Perspective Projection object positions are transformed to the view plane along lines that converge to a point called the projection reference point or center of projection. A perspective projection produces realistic views but does not preserve relative proportions. Projection of distant objects are smaller than the projection of objects of the same size that are closer to the projection plane.
For more details visit: http://www.gurukpo.com/
No comments:
Post a Comment