16 #ifndef vtkOpenGLVolumeOpacityTable_h
17 #define vtkOpenGLVolumeOpacityTable_h
23 #include <vtkTextureObject.h>
62 double sampleDistance,
68 bool needUpdate =
false;
84 if(scalarOpacity->
GetMTime() > this->BuildTime ||
85 this->TextureObject->GetMTime() > this->BuildTime ||
86 (this->LastBlendMode != blendMode) ||
88 this->LastSampleDistance != sampleDistance) ||
89 needUpdate || !this->TextureObject->GetHandle())
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;
vtkMTimeType GetMTime() override
Data objects are composite objects and need to check each part for MTime.
static T Max(const T &a, const T &b)
Returns the maximum of the two arugments provided.
static int NearestPowerOfTwo(int x)
Compute the nearest power of two that is not less than x.
virtual void Delete()
Delete a VTK object.
abstract base class for most VTK objects
int GetMaximumSupportedTextureWidth(vtkOpenGLRenderWindow *renWin, int idealWidth)
vtkTextureObject * TextureObject
void Update(vtkPiecewiseFunction *scalarOpacity, int blendMode, double sampleDistance, double range[2], double unitDistance, int filterValue, vtkOpenGLRenderWindow *renWin)
double LastSampleDistance
void ReleaseGraphicsResources(vtkWindow *window)
static vtkOpenGLVolumeOpacityTable * New()
~vtkOpenGLVolumeOpacityTable()
vtkOpenGLVolumeOpacityTable(int width=1024)
void ReleaseGraphicsResources(vtkWindow *window)
size_t GetNumberOfTables()
vtkOpenGLVolumeOpacityTable * GetTable(unsigned int i)
vtkOpenGLVolumeOpacityTables(unsigned int numberOfTables)
~vtkOpenGLVolumeOpacityTables()
Defines a 1D piecewise function.
void GetTable(double x1, double x2, int size, float *table, int stride=1)
Fills in an array of function values evaluated at regular intervals.
int EstimateMinNumberOfSamples(double const &x1, double const &x2)
Estimates the minimum size of a table such that it would correctly sample this function.
abstracts an OpenGL texture object.
void Deactivate(unsigned int texUnit)
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].
void ReleaseGraphicsResources(vtkWindow *win)
Deactivate and UnBind the texture.
virtual void SetMagnificationFilter(int)
int GetTextureUnit()
Return the texture unit used for this texture.
static vtkTextureObject * New()
static int GetMaximumTextureSize(vtkOpenGLRenderWindow *context)
Query and return maximum texture size (dimension) supported by the OpenGL driver for a particular con...
void Activate(unsigned int texUnit)
Set the active tex unit and bind (using our bind).
virtual void SetMinificationFilter(int)
virtual void SetWrapS(int)
void SetContext(vtkRenderWindow *)
Get/Set the context.
record modification and/or execution time
void Modified()
Set this objects time to the current time.
@ MAXIMUM_INTENSITY_BLEND
window superclass for vtkRenderWindow
vtkStandardNewMacro(vtkOpenGLVolumeOpacityTable)