public void SetAlphaTest(
	bool flag
)

Public Sub SetAlphaTest ( 
	flag As Boolean
)

public:
void SetAlphaTest(
	bool flag
)

member SetAlphaTest : 
        flag : bool -> unit 

Parameters

flag

Type: SystemBoolean

Default is false (alpha test disabled) and the default test is "not equal to zero". The alpha test operates on all pixel writes, including those resulting from the scan conversion of points, lines, polygons, and bitmaps, and from pixel draw and copy operations. It does not affect screen clear operations.

For example, if rendering with textures containing "binary" alpha values (0 or 1), the alpha test may be faster than blended transparency and does not require the use of delayed rendering transparency types.

The default value can be set using the environment variable OIV_ALPHA_TEST (0 = false, 1 = true).

Reference