What is the image texture?
Image texture is a two -dimensional (2D) computer image that is used in computer graphics to help add visual characteristics to an object or screen area. The texture of the image can be generated manually or procedure, or it can be sampled from a real photo or other source. Generally, the texture of the image is used to cover the polygon surface, such as a triangle or square, a process called texture mapping. In three -dimensional (3D) computer graphics, the texture of the image can be wrapped around whole objects composed of many polygons to make the 3D object more realistic. There are several other applications for image texture, including impact mapping, height and silhuetting fields. This geometry can be as simple as a square in the graphics program, or it can be as complex as a 3D model made of thousands of polygons. The process of texture to the object includes defining where each of the corners of the image appears on geometry. For a square this process is easy because the picture isAlso square, so each corner of the picture corresponds to the corner of the square. This simple 2D texture can be used to make one polygon look like a chessboard with dozens of squares on its surface using a chessboard image as a texture image.
When it is used to pack around a 3D object, various complex algorithms can be used to determine where different parts of the 2D image actually appear on the model. The image can be projected directly onto the object, but this generally causes distortion of objects that are not flat. For example, the sphere causes the image to clamp at the top and bottom when the geometry collapses to individual points. The use of various Tealgorithms of Xture-Jako mapping is spherical, cylindrical or torus mapping-can prevent it from appearing.
More complicated technique Mapping image texture uses surface coordinates to apply an image to an object. This method essentially takes the texture of the image andInterpolates the position of each pixel in the image using a separate set of texture coordinates defined by the user. By knowing what parts of the image they will be and are not distorted, the texture image can be adjusted to compensate and introduce the texture as it should be seen. Most professional 3D graphics use this method with image texture because it provides the most predictable and flexible results on the model of all angles. In this way, textures such as human heads or clothes are often used.