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Non-texture parts

Polygon
This is a polygon with 4 vertices. The difference from the sprite is that the inside of the plane surrounded by four points is filled with a single color. The one with the original picture is a sprite and the one without it is a polygon.

Polyline
This is a quadrangular shape with 4 lines connected.

Line
Draw a line with a single color between two points.

Figure 3.6 Polygon, polyline, line

● Display

Display uses a general display device, TV. Domestic and American TV standards are NTSC. Europe uses the PAL method.
* TV display is performed by reading data from the top of the frame buffer every frame (1 frame is 1/60 second).
通常 Normally 1 frame is 1 field, but interlaced 1 frame can be 2 fields, and the vertical resolution can be doubled (1 frame is 1/30 second). As shown in Table 3.5, there are double density and single density interlace (Table 3.5).

Table 3.5 Interlace 
 Double-dense interlace 
 Display different images with odd and even lines 
 Single density interlace 
 Show the same image with odd and even lines

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