ELF>P7@@%$  UH@dH%(HD$81HHt$HD$HFHD$$D$ t0H|$1HT$8dH+%(uhH@]@HT$H|$H5|$HtHt+HH5HPtHuH1Huff.fUSHHdH%(HD$81HHt$HD$HFHD$$D$ HD$t6H|$1HT$8dH+%(HH[]DHt$H|$tHl$H=HtHH=uHuHc@HH=tHH=tHATUSH@fnFdH%(HD$81HHt$HD$HGfnȉD$(fbfD$ uYHD$Ho(Ht!\$ +\$$tJH|$1HT$8dH+%(H@[]A\HHuːHt$H|$tD$$Ld$u`HELH@H;H=tLH=u-HaHcVf.LLH=tLH=tLfDHЉfATH0fnFdH%(HD$(1HH4$HD$HGfnȉD$fbfD$uDH(HtD$9D$tIH11E1HD$(dH+%(H0LA\@HHufHHRxH;IMtoI$H5LPtZHuLIHoHbL1HHP@L8fE1H"DIjfATL%H HH5LuLHLA\ATIUHHt HH5LHtHmtH]A\HH]A\UH@fnFdH%(HD$81HHt$HD$HGfnȉD$(fbfD$ uLHo(Ht!D$ +D$$tFH|$1HT$8dH+%(uzH@]f.HHuϐH5HT$H|$|$HtD$$u(HEHHuHH@HSafeDownCastvtkObjectBasevtkSobelGradientMagnitudePassIsTypeOfIsANewInstanceReleaseGraphicsResourcesvtkWindowHHvtkImageProcessingPassvtkRenderPassvtkObjectUH=Hu]ÐHH=tHH=tHH=tH]vtkSobelGradientMagnitudePass - Implement a post-processing edge detection with a Sobel gradient magnitude render pass. Superclass: vtkImageProcessingPass Detect the edges of the image renderered by its delegate. Edge-detection uses a Sobel high-pass filter (3x3 kernel). This pass expects an initialized depth buffer and color buffer. Initialized buffers means they have been cleared with farest z-value and background color/gradient/transparent color. An opaque pass may have been performed right after the initialization. The delegate is used once. Its delegate is usually set to a vtkCameraPass or to a post-processing pass. This pass requires a OpenGL context that supports texture objects (TO), framebuffer objects (FBO) and GLSL. If not, it will emit an error message and will render its delegate and return. @par Implementation: To compute the gradient magnitude, the x and y components of the gradient (Gx and Gy) have to be computed first. Each computation of Gx and Gy uses a separable filter. The first pass takes the image from the delegate as the single input texture. The first pass has two outputs, one for the first part of Gx, Gx1, result of a convolution with (-1 0 1), one for the first part of Gy, Gy1, result of a convolution with (1 2 1). The second pass has two inputs, Gx1 and Gy1. Kernel (1 2 1)^T is applied to Gx1 and kernel (-1 0 1)^T is applied to Gx2. It gives the values for Gx and Gy. Thoses values are then used to compute the magnitude of the gradient which is stored in the render target. The gradient computation happens per component (R,G,B). A is arbitrarly set to 1 (full opacity). @par Implementation:\image html vtkSobelGradientMagnitudePassFigure.png\image latex vtkSobelGradientMagnitudePassFigure.eps @sa vtkRenderPass vtkRenderingOpenGL2Python.vtkSobelGradientMagnitudePassV.IsTypeOf(string) -> int C++: static vtkTypeBool IsTypeOf(const char *type) Return 1 if this class type is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h. V.IsA(string) -> int C++: vtkTypeBool IsA(const char *type) override; Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h. V.SafeDownCast(vtkObjectBase) -> vtkSobelGradientMagnitudePass C++: static vtkSobelGradientMagnitudePass *SafeDownCast( vtkObjectBase *o) V.NewInstance() -> vtkSobelGradientMagnitudePass C++: vtkSobelGradientMagnitudePass *NewInstance() V.ReleaseGraphicsResources(vtkWindow) C++: void ReleaseGraphicsResources(vtkWindow *w) override; Release graphics resources and ask components to release their own resources. \pre w_exists: w!=0 ATL%UH-HHH=LHH=LH5HHH]A\HDGCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0GNUzRx  0 DEDPa AE zPLRx $HIbEY B }(EAD`n AAF 0FAA D`  AABH $gFD@ EE HMFF0dOFDD n ABA DDB$dFHN DAB EDP AK    1 ogErd@ E J O 9TY^%c Bh Fm Rs ky~" -Yh" ! 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