BaseParas-Struct Summary-Volumetric Fog Plugin-C/C++-Computer Graphics Kit

Expand

Struct Info
struct BaseParas Basic parameters required for volumetric fog rendering, including height fog, noise fog, and camera parameters.

Struct Info

struct BaseParas

Basic parameters required for volumetric fog rendering, including height fog, noise fog, and camera parameters.

Public Field Summary

Expand

Qualifier and Type	Field and Description
float	density Fog density. The greater the value is, the thicker the fog is. The value range is [0, 1].
float	absorb Light absorption coefficient, that is, the absorption ratio of light in fog. The greater the value is, the more light is absorbed, and the darker the scene is. The value range is [0, 1].
float	scatter Scattering coefficient, that is, the scattering ratio of light in fog. The greater the value is, the more light is scattered to the atmosphere, and the brighter the fog appears. The value range is [0, 1].
bool	noiseFogEnable Noise fog enable.
float	noiseFogAmount Amount of noise fog. 0 indicates no noise fog. The value range is [0, 2].
float[3]	noiseFogScale Scales of noise fog in all directions, used to build expansive fog.
float	noiseBias Graininess of noise fog. The value range is [0, 1].
float[3]	windSpeed Wind speeds in all directions, to control the flow of noise fog.
float	time Plugin execution duration, in seconds, which impacts the motion of noise fog.
bool	heightFogEnable Height fog enable. If enabled, makes the fog attenuated exponentially with the height.
float	heightFogExponent Height attenuation coefficient of height fog. 0 indicates that there is no height fog. A larger value indicates stronger height attenuation. The value range is [0, 1].
float	heightFogOffset Initial height of height fog. The value range is [0, 10].
float	ambientLightIntensity Intensity of global ambient light.
float[3]	ambientLightColor RGB value of the global ambient color.
float[3]	camPos Camera position.
float[3]	camDir Camera direction.
float	nearClip Near clipping plane of the camera. The value range is [0, 1].
float	farClip Far clipping plane of the camera. The value range is [3, 80].
float	withdraw Buffer size. The value range is [0, 10]. The default value 5 is recommended.
float[3]	posLB Lower left coordinates of the near clipping plane in the world coordinate system.
float[3]	posRB Lower right coordinates of the near clipping plane in the world coordinate system.
float[3]	posLT Upper left coordinates of the near clipping plane in the world coordinate system.
int	pointLightNum Number of point lights. The value range is [0, 8].
int	spotLightNum Number of spot lights. The value range is [0, 8].
int	tileSize Tile size of a volume pixel (voxel). The smaller the value is, the better the rendering result is, yet the longer the rendering takes. The value range is [8, 16]. The default value 12 is recommended. NOTE tileSize is the size of the tiles at the screen center. Moving outwards, the tile sizes increase gradually with an exponent 1.25. That is, the farther a location is away from the screen center, the fewer the tiles are there.
int	volumeDepth Depth of a voxel in the Z direction. The greater the value is, the better the rendering result is, yet the longer the rendering takes. The value range is [16, 64], among which values in [36, 48] are recommended. NOTE Depth units in the Z direction gradually grow with an exponent 1.6 along the camera direction. That is, the farther a location is away from the camera plane, the fewer depth units are there.