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16 #ifndef vtkOpenGLVolumeOpacityTable_h
17 #define vtkOpenGLVolumeOpacityTable_h
23 #include <vtkTextureObject.h>
62 double sampleDistance,
68 bool needUpdate =
false;
98 delete [] this->
Table;
113 float* ptr = this->
Table;
114 double factor = sampleDistance/unitDistance;
120 *ptr = static_cast<float>(1.0-pow(1.0-static_cast<double>(*ptr),
130 float* ptr = this->
Table;
131 double factor = sampleDistance/unitDistance;
137 *ptr = static_cast<float>(static_cast<double>(*ptr)*factor);
169 vtkErrorMacro(
"vtkTextureObject not initialized!");
178 vtkErrorMacro(
"Failed to query max texture size! using default 1024.");
182 if (maxWidth >= idealWidth)
188 vtkWarningMacro(
"This OpenGL implementation does not support the required "
189 "texture size of " << idealWidth <<
". Falling back to maximum allowed, "
190 << maxWidth <<
"." <<
"This may cause an incorrect color table mapping.");
240 delete[] this->
Table;
271 this->Tables.reserve(static_cast<size_t>(numberOfTables));
273 for (
unsigned int i = 0; i < numberOfTables; i++)
276 this->Tables.push_back(table);
283 size_t const size = this->Tables.size();
284 for (
size_t i = 0; i <
size; i++)
286 this->Tables[i]->Delete();
294 if (i >= this->Tables.size())
298 return this->Tables[i];
305 return this->Tables.size();
311 size_t const size = this->Tables.size();
312 for (
size_t i = 0; i <
size; ++i)
314 this->Tables[i]->ReleaseGraphicsResources(window);
319 std::vector<vtkOpenGLVolumeOpacityTable*> Tables;
328 #endif // vtkOpenGLVolumeOpacityTable_h
void ReleaseGraphicsResources(vtkWindow *win)
Deactivate and UnBind the texture.
size_t GetNumberOfTables()
static int NearestPowerOfTwo(int x)
Compute the nearest power of two that is not less than x.
virtual void SetMinificationFilter(int)
int GetMaximumSupportedTextureWidth(vtkOpenGLRenderWindow *renWin, int idealWidth)
static T Max(const T &a, const T &b)
Returns the maximum of the two arugments provided.
virtual void SetWrapS(int)
void GetTable(double x1, double x2, int size, float *table, int stride=1)
Fills in an array of function values evaluated at regular intervals.
record modification and/or execution time
void ReleaseGraphicsResources(vtkWindow *window)
abstract base class for most VTK objects
static int GetMaximumTextureSize(vtkOpenGLRenderWindow *context)
Query and return maximum texture size (dimension) supported by the OpenGL driver for a particular con...
virtual void Delete()
Delete a VTK object.
void Activate(unsigned int texUnit)
Set the active tex unit and bind (using our bind).
int EstimateMinNumberOfSamples(double const &x1, double const &x2)
Estimates the minimum size of a table such that it would correctly sample this function.
int GetTextureUnit()
Return the texture unit used for this texture.
window superclass for vtkRenderWindow
vtkMTimeType GetMTime() override
Data objects are composite objects and need to check each part for MTime.
double LastSampleDistance
void Modified()
Set this objects time to the current time.
void SetContext(vtkRenderWindow *)
Get/Set the context.
virtual vtkMTimeType GetMTime()
Return this object's modified time.
abstracts an OpenGL texture object.
static vtkTextureObject * New()
~vtkOpenGLVolumeOpacityTables()
vtkOpenGLVolumeOpacityTables(unsigned int numberOfTables)
void Deactivate(unsigned int texUnit)
virtual void SetMagnificationFilter(int)
Defines a 1D piecewise function.
void Update(vtkPiecewiseFunction *scalarOpacity, int blendMode, double sampleDistance, double range[2], double unitDistance, int filterValue, vtkOpenGLRenderWindow *renWin)
vtkStandardNewMacro(vtkOpenGLVolumeOpacityTable)
vtkTextureObject * TextureObject
virtual unsigned int GetHandle()
Returns the OpenGL handle.
vtkOpenGLVolumeOpacityTable * GetTable(unsigned int i)
static vtkOpenGLVolumeOpacityTable * New()
~vtkOpenGLVolumeOpacityTable()
void ReleaseGraphicsResources(vtkWindow *window)
bool Create2DFromRaw(unsigned int width, unsigned int height, int numComps, int dataType, void *data)
Create a 2D texture from client memory numComps must be in [1-4].
vtkOpenGLVolumeOpacityTable(int width=1024)