D3DFOGMODE Enumerated Type

Defines constants that describe the fog mode.

Syntax

typedef enum _D3DFOGMODE {
    D3DFOG_NONE = 0,
    D3DFOG_EXP = 1,
    D3DFOG_EXP2 = 2,
    D3DFOG_LINEAR = 3,
    D3DFOG_FORCE_DWORD = 0x7fffffff
} D3DFOGMODE;

Constants

D3DFOG_NONE
No fog effect.
D3DFOG_EXP
Fog effect intensifies exponentially, according to the following formula.
D3DFOG_EXP2
Fog effect intensifies exponentially with the square of the distance, according to the following formula.
D3DFOG_LINEAR
Fog effect intensifies linearly between the start and end points, according to the following formula.
This is the only fog mode currently supported.
D3DFOG_FORCE_DWORD
Forces this enumeration to compile to 32 bits in size. This value is not used.

Remarks

The values in this enumerated type are used by the D3DRS_FOGTABLEMODE and D3DRS_FOGVERTEXMODE render states.
Fog can be considered a measure of visibility—the lower the fog value produced by a fog equation, the less visible an object is.

Enumerated Type Information

Header d3d9types.h
Minimum operating systems Windows 98