3D is the abbreviation of Three-Dimensional, which is three-dimensional graphics. The 3D graphic is displayed in the computer, that is, the three-dimensional graphic is displayed in the plane. Unlike real world, real three-dimensional space has real distance space. It just looks like a real world, so the 3D graphic displayed in the computer is like it is true. One characteristic of the human eye is nearly a long, and it will form a three-dimensional sense.
The computer screen is a flat two-dimensional, we can enjoy the truthful three-dimensional image because the color grayscale is displayed in the computer screen, and the eye has a visual illusion, and two-dimensional computers The screen is perceived as a three-dimensional image. Based on color learning, the convex portion of the three-dimensional object is generally highly bright, and the concave portion is dimmed due to the occlusion of the light. This understanding is widely used in web pages or other applications to draw a button, 3D lines. For example, the 3D text to be drawn, that is, the high brightness color is displayed in the original location, and the low brightness color is submitted in the lower left or upper right, so that the effect of 3D text is generated in the visual. When implemented, the 2D text of two different colors can be drawn in different locations, as long as the coordinates of the two texts can be given to the 3D text of different effects.
