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Cloud Interface Classes¶

class CloudProperties¶

A virtual interface that returns the keyframe-independent cloud properties.

Subclassed by simul::clouds::CellularCloudGrid

Public Functions

virtual platform::math::Vector3 GetOrigin(platform::math::Vector3, float cloud_base_z, float w) const = 0¶: get the effective origin in world co-ordinates, including wind offsets:

virtual int GetGenerationNumber() const = 0¶: A number that is changed every time the clouds are regenerated.

virtual void GetExtents(platform::math::Vector3 &X1, platform::math::Vector3 &X2, float cloud_base_z, float w, float h) const = 0¶: Get the physical extents of the cloud volume in the x, y and z directions.

virtual const float *GetTransformToLightspaceMatrix(unsigned axis, const platform::math::Vector3 &dir, const platform::math::Vector3 &orig, const platform::math::Vector3 &scales) const = 0¶: Get a 4x4 matrix to transform from real space to lightspace.

virtual const float *GetTransformLightspaceToCloudspaceMatrix(unsigned axis, const platform::math::Vector3 &dir, const platform::math::Vector3 &orig, const platform::math::Vector3 &scales, float cloud_base_z, float w, float h) const = 0¶: Get a 4x4 matrix to transform from lightspace to cloudspace.

class CloudInterface¶

The virtual interface for controlling and reading cloud data.

Public Functions

virtual float GetOpticalPathLength(float cloud_base_z, float w, float h, const platform::math::Vector3 &X, const platform::math::Vector3 &dir, float time, float cloudiness, float extinction, float diffusivity) const = 0¶: At the 3D Position X, find the optical density of cloud in the direction dir.

virtual float GetCloudDensity(float cloud_base_z, float width, float height, const platform::math::Vector3 &X, float time, float cloudiness, float extinction, float diffusivity) const = 0¶: Get the normalized cloud density at real-world position X.

virtual platform::math::NoiseInterface *GetNoiseInterface() = 0¶: Get the noise object.

class CloudGridInterface¶: The virtual interface for controlling and reading a grid of cloud data.