Other D3DX Constants
Other D3DX constants include the following:
16-Bit Floating Point Numbers
| #define | Description |
|---|---|
| D3DX_16F_DIG | Number of decimal digits of precision |
| D3DX_16F_EPSILON | Smallest such that 1.0 + epsilon != 1.0 |
| D3DX_16F_MANT_DIG | Number of bits in mantissa |
| D3DX_16F_MAX | Maximum value |
| D3DX_16F_MAX_10_EXP | Maximum decimal exponent |
| D3DX_16F_MAX_EXP | Maximum binary exponent |
| D3DX_16F_MIN | Minimum positive value |
| D3DX_16F_MIN_10_EXP | Minimum decimal exponent |
| D3DX_16F_MIN_EXP | Minimum binary exponent |
| D3DX_16F_RADIX | Exponent radix |
| D3DX_16F_ROUNDS | Addition rounding: near |
| D3DX_1BYPI | 1/pi |
| D3DX_PI | pi |
| D3DX_DEFAULT_FLOAT | Maximum float value |
These #defines are declared in d3dx9.h and d3dx9math.h.
PRT Constants
| #define | Description |
|---|---|
| D3DXSH_MINORDER | Lowest allowable order of the simulation. |
| D3DXSH_MAXORDER | Highest allowable order of the simulation. |
These #defines are declared in d3dx9math.h. For more about PRT, see Precomputed Radiance Transfer (Direct3D 9).
Texture Constants
| #define | Description |
|---|---|
| D3DFMT_FROM_FILE | Take the format exactly from a file. |
| D3DX_DEFAULT | A default value. |
| D3DX_DEFAULT_NONPOW2 | Do not round up numbers such as width or height to a power of two. |
| D3DX_FROM_FILE | Take the texture dimensions exactly from a file. |
These #defines are declared in d3dx9.h.
Other D3DX Constants
The UNUSED16 and D3DX_VERSION constants defined in D3dx9mesh.h and D3dx9core.h are used internally. Do not use these constants.
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