< 3/54>VDP1 User's Manual/1.VDP1 Features

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VDP1 User's Manual/Chapter 1 VDP1 Functions

●Non-texture parts

Non-textured parts do not require the original picture, so unlike textured parts, VRAM is not accessed frequently from VDP1.

◆Polygon

Draw a rectangle. Specify four vertices and fill the plane surrounded by the four points with a single color. Any 4 points can be specified.
Specify the color as a non-texture color.
Draw polygons as diagonal lines. At this time, fill in the holes so that there are no missing pixels. As a result, pixels are written twice, so results are not guaranteed for color calculations such as semi-transparent processing.
You can also draw interior rectangles. However, since it is drawn using lines when filling, it may extend outside the rectangle.

Figure 1.7 Polygon

◆Polyline

Draw a rectangle by connecting four straight lines. Specify four vertices and draw a line connecting the vertices in order. Unlike polygons, it does not fill the plane surrounded by 4 points. Any 4 points can be specified.
Specify the color as a non-texture color.
Since four lines are drawn, pixels are drawn twice near the vertices where the lines overlap. Therefore, the results of color calculations such as translucent processing are not guaranteed.

Figure 1.8 Polyline

◆Line

Draws a line in a single color between the coordinates of two points. Specify the color as a non-texture color.

Figure 1.9 Line

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