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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

Members


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.

Arguments

  • 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.

Arguments

  • 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.

Arguments

  • 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.

Arguments

  • int channel - Required channel.

Return value

Pointer to a Curve2d object.

void setNumChannels ( int channels ) #

Sets the new number of channels for the texture.

Arguments

  • 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.

Arguments

  • int resolution - Texture width resolution.

int getResolution ( ) const#

Returns the texture width resolution.

void setFlags ( int flags ) #

Sets texture flags.

Arguments

  • 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++)
addChangedCallback(MakeCallback(changed_callback_function_name));

Arguments

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.

Arguments

  • 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 ) #

Resets a curve for the given channel to a default one.

Arguments

  • int channel - R, G, B, or A channel set by the corresponding value from 0 to 3.
  • const Ptr<Curve2d> & default_curve - A curve to be used as the default one.

bool isDefault ( int channel ) const#

Returns a value indicating if the value of the given curve channel is the default one which was previously set via setDefaultCurve.

Arguments

  • int channel - R, G, B, or A channel set by the corresponding value from 0 to 3.

Return value

true if the curve value is the default one set via setDefaultCurve, otherwise false.

bool isDefaultAll ( ) const#

Returns a value indicating if the values of all curve channels are the default ones which were previously set via setDefaultCurve.

Return value

true if the values of all curve channels are the default ones set via setDefaultCurve, otherwise false.

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

Saves the texture curve into the given Xml.

Arguments

  • const Ptr<Xml> & xml - An Xml node.

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

Loads the texture curve from the given Xml.

Arguments

  • const Ptr<Xml> & xml - An Xml node.

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

Saves the state of the texture curve into a binary stream.

Arguments

  • const Ptr<Stream> & stream - The stream to save the texture curve state data.

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

Restores the state of the texture curve from the binary stream.

Arguments

  • const Ptr<Stream> & stream - The stream that stores the texture curve state data.
Last update: 2020-11-11