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4/8/2010

This enumeration provides values that identify fog equations used in various render states. Both vertex and pixel fog modes support all of these fog equations.

Syntax 

typedef enum _D3DMFOGMODE {
  D3DMFOG_NONE		= 0,
  D3DMFOG_EXP		 = 1,
  D3DMFOG_EXP2		= 2,
  D3DMFOG_LINEAR	= 3,
  D3DMFOG_FORCE_ULONG = 0x7fffffff,
} D3DMFOGMODE;

Elements

D3DMFOG_NONE

Identifies that fogging modes are disabled.

D3DMFOG_EXP

Identifies a fog model where the fog effect, F, intensifies according to the following equation.

Copy Code 
F = 1/e^(d*density)

In this equation, eis the base of the natural logarithm, and dis distance. The value for densityis the value of the D3DMRS_FOGDENSITY render state. For more information, see D3DMRENDERSTATETYPE.

D3DMFOG_EXP2

Identifies a fog model where the fog effect, F, intensifies according to the following equation.

Copy Code 
F = 1/e^(d*density)<SUP>2</SUP>
D3DMFOG_LINEAR

Identifies a fog model where the fog effect, F, intensifies linearly between the start and end points according to the following equation.

Copy Code 
F = (end - d)/(end - start)

The values for startand endare the values of the D3DMRS_FOGSTART and D3DMRS_FOGEND render states.

D3DMFOG_FORCE_ULONG

Forces the compiler to interpret the enumeration as a ULONG value. This value is not used directly in Direct3D Mobile programming.

Requirements

Header d3dmtypes.h
Windows Embedded CE Windows CE 5.0 and later
Windows Mobile Windows Mobile Version 5.0 and later

See Also