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Unigine::TextureCurve Class

Header: #include <UnigineTextures.h>

Interface for handling curve textures. This class lets the user store 2d curves in a form of a texture (convert vectors to raster data).

Curve textures can be used for color variation in the particles_base material of Particle Systems or in other custom materials.

You can set up to 4 channels for the curve texture.

TextureCurve Class


static TextureCurvePtr create ( int num_channels, int resolution, int flags ) #

Sets resolution, number of channels and texture flags for this TextureCurve instance. The pointer to the curve texture is set to null and curves are marked for an update.


  • int num_channels - Number of texture channels.
  • int resolution - Width resolution of the curve texture.
  • int flags - Texture flags.

static TextureCurvePtr create ( const Ptr<TextureCurve> & texture_curve ) #

Curve texture constructor. Creates a new curve texture by copying a given source curve texture.


  • const Ptr<TextureCurve> & texture_curve - Pointer to a new curve texture.

TextureCurve ( ) #

Ptr<Texture> getTexture ( ) const#

Creates a new texture and updates hashes for curves, if required. Returns a pointer to the texture or null if the texture was not created.

void releaseTexture ( ) #

Deletes the texture and its pointer.

void copy ( const Ptr<TextureCurve> & src_texture_curve ) #

Copies the curves data of a source texture to the texture.


  • const Ptr<TextureCurve> & src_texture_curve - Source curve texture.

Ptr<TextureCurve> clone ( ) const#

Duplicates the curve texture and returns a pointer to the copy.

Ptr<Curve2d> getCurve ( int channel ) const#

Returns a pointer to the Curve2d for the specified channel.


  • int channel - Required channel.

Return value

Pointer to a Curve2d object.

void setNumChannels ( int channels ) #

Sets the new number of channels for the texture.


  • int channels - Number of texture channels.

int getNumChannels ( ) const#

Returns the number of texture channels.

void setResolution ( int resolution ) #

Sets the width resolution for the texture.


  • int resolution - Texture width resolution.

int getResolution ( ) const#

Returns the texture width resolution.

void setFlags ( int flags ) #

Sets texture flags.


  • int flags - Texture flags.

int getFlags ( ) const#

Returns texture flags.

void * addChangedCallback ( Unigine::CallbackBase * func ) #

Adds a callback function to be called on changing the curve texture. The signature of the changed callback function must be as follows:
Source code (C++)
void changed_callback_function_name();

You can set a callback function as follows:

Source code (C++)


  • Unigine::CallbackBase * func - Callback pointer.

Return value

ID of the last added changed callback, if the callback was added successfully; otherwise, nullptr. This ID can be used to remove this callback when necessary.

bool removeChangedCallback ( void * id ) #

Removes the specified callback from the list of changed callbacks.


  • void * id - Changed callback ID obtained when adding it.

Return value

True if the changed callback with the given ID was removed successfully; otherwise false.

void clearChangedCallbacks ( ) #

Clears all added changed callbacks.

void setDefaultCurve ( int channel, const Ptr<Curve2d> & default_curve ) #


  • int channel
  • const Ptr<Curve2d> & default_curve

bool isDefault ( int channel ) const#


  • int channel

bool isDefaultAll ( ) const#

void save ( const Ptr<Xml> & xml ) #


  • const Ptr<Xml> & xml

void load ( const Ptr<Xml> & xml ) #


  • const Ptr<Xml> & xml

void saveState ( const Ptr<Stream> & stream ) #


  • const Ptr<Stream> & stream

void restoreState ( const Ptr<Stream> & stream ) #


  • const Ptr<Stream> & stream
Last update: 2020-10-13