Geometric primitives are the basic geometrical shapes used to construct computer graphics scenes and the resulting final images.
Commonly used 3D geometric primitives include :
(1.) Points : A point is an exact position or location on a plane surface.
- Line : A line is a straight curve. When geometry is used to model the real world, lines are used to represent straight objects with negligible width and height.
- Linesegments : A line segment is a part of a line that is bounded by two end points, and contains every point on the line between its end points.
- Planes : A plane is the two dimensional analogue of a point (zero-dimensions), a line (one-dimension) and a space (three-dimensions).
- Circles : A circle is a simple shape of Euclidean geometry consisting of those points in a plane which is equidistant from a given point called the centre.
- Ellipses : Ellipses are closed curves and are the bounded case of the conic sections, the curves that result from the intersection of a circular cone and a plane that does not pass through its apex.
- Triangles : A polygon with three corners or vertices and three sides or edges which are line segments is called a triangle.
- Polygons: A polygon is traditionally a plane figure that is bounded by a closed path or circuit, composed of a finite sequence of straight line
- Spline : A spline is a special function defined piecewise by polynomial and preferred by polynomial interpolation.
- Spheres: A sphere is perfectly bound geometric object in three dimensional space , such as the shape of round ball.
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