Classic Monte Carlo Pathtracing algorithm for real global illumination. More...

#include <SLPathtracer.h>

Inheritance diagram for SLPathtracer:

Public Member Functions
	SLPathtracer ()

	~SLPathtracer ()

SLbool	render (SLSceneView *sv)

void	renderSlices (bool isMainThread, SLint currentSample, SLuint threadNum)

SLCol4f	trace (SLRay *ray, SLbool em)

SLCol4f	shade (SLRay ray, SLCol4f mat)

void	saveImage ()
	Saves the current PT image as PNG image. More...

void	calcDirect (SLbool di)

void	calcIndirect (SLbool ii)

SLbool	calcDirect () const

SLbool	calcIndirect () const

Public Member Functions inherited from SLRaytracer
	SLRaytracer ()

	~SLRaytracer () override

SLbool	renderClassic (SLSceneView *sv)

SLbool	renderDistrib (SLSceneView *sv)

void	renderSlices (bool isMainThread, SLuint threadNum)

void	renderSlicesMS (bool isMainThread, SLuint threadNum)

SLCol4f	trace (SLRay *ray)

SLCol4f	shade (SLRay *ray)

void	sampleAAPixels (bool isMainThread, SLuint threadNum)

void	renderUIBeforeUpdate ()
	Must be called before an inbetween frame updateRec. More...

void	setPrimaryRay (SLfloat x, SLfloat y, SLRay *primaryRay)
	Set the parameters of a primary ray for a pixel position at x, y. More...

void	getAAPixels ()

SLCol4f	fogBlend (SLfloat z, SLCol4f color)

virtual void	printStats (SLfloat sec)

virtual void	initStats (SLint depth)

void	state (SLRTState state)

void	maxDepth (SLint depth)

void	resolutionFactor (SLfloat rf)

void	doDistributed (SLbool distrib)

void	doContinuous (SLbool cont)

void	doFresnel (SLbool fresnel)

void	aaSamples (SLint samples)

void	gamma (SLfloat g)

SLRTState	state () const

SLint	maxDepth () const

SLbool	doDistributed () const

SLbool	doContinuous () const

SLbool	doFresnel () const

SLint	aaSamples () const

SLint	progressPC () const

SLfloat	aaThreshold () const

SLfloat	renderSec () const

SLfloat	gamma () const

SLfloat	oneOverGamma () const

SLfloat	resolutionFactor () const

SLint	resolutionFactorPC () const

SLfloat	raysPerMS ()

virtual void	prepareImage ()

virtual void	renderImage (bool updateTextureGL)

virtual void	saveImage ()
	Saves the current RT image as PNG image. More...

Public Member Functions inherited from SLGLTexture
	SLGLTexture ()
	Default ctor for all stack instances (not created with new) More...

	SLGLTexture (SLAssetManager *assetMgr, const SLVCol4f &colors, SLint min_filter=GL_LINEAR, SLint mag_filter=GL_LINEAR, SLint wrapS=GL_REPEAT, const SLstring &name="2D-Texture")
	ctor for 1D texture with internal image allocation More...

	SLGLTexture (SLAssetManager *assetMgr, SLint min_filter, SLint mag_filter, SLint wrapS, SLint wrapT, SLenum target=GL_TEXTURE_2D)
	ctor for empty 2D textures More...

	SLGLTexture (SLAssetManager assetMgr, unsigned char data, int width, int height, int cvtype, SLint min_filter, SLint mag_filter, SLTextureType type, SLint wrapS, SLint wrapT)
	ctor for 2D textures from byte pointer More...

	SLGLTexture (SLAssetManager *assetMgr, const SLstring &imageFilename, SLint min_filter=GL_LINEAR_MIPMAP_LINEAR, SLint mag_filter=GL_LINEAR, SLTextureType type=TT_unknown, SLint wrapS=GL_REPEAT, SLint wrapT=GL_REPEAT)
	ctor for 2D textures with internal image allocation More...

	SLGLTexture (SLAssetManager *assetMgr, const SLVstring &imageFilenames, SLint min_filter=GL_LINEAR, SLint mag_filter=GL_LINEAR, SLint wrapS=GL_REPEAT, SLint wrapT=GL_REPEAT, const SLstring &name="3D-Texture", SLbool loadGrayscaleIntoAlpha=false)
	ctor for 3D texture with internal image allocation More...

	SLGLTexture (SLAssetManager *assetMgr, SLint depth, const SLstring &imageFilename, SLint min_filter=GL_LINEAR, SLint mag_filter=GL_LINEAR, SLint wrapS=GL_REPEAT, SLint wrapT=GL_REPEAT, const SLstring &name="3D-Texture", SLbool loadGrayscaleIntoAlpha=false)
	ctor for 3D texture from a single file with depth as 3rd dimension More...

	SLGLTexture (SLAssetManager *assetMgr, const SLstring &imageFilenameXPos, const SLstring &imageFilenameXNeg, const SLstring &imageFilenameYPos, const SLstring &imageFilenameYNeg, const SLstring &imageFilenameZPos, const SLstring &imageFilenameZNeg, SLint min_filter=GL_LINEAR, SLint mag_filter=GL_LINEAR, SLTextureType type=TT_unknown)
	ctor for cube mapping with internal image allocation More...

	~SLGLTexture () override

virtual void	build (SLint texUnit)

void	deleteData ()
	Delete all data (CVImages and GPU textures) More...

void	deleteDataGpu ()
	Deletes the OpenGL texture objects and releases the memory on the GPU. More...

void	deleteImages ()
	Deletes the CVImages in _images. No more texture mapping in ray tracing. More...

void	bindActive (SLuint texUnit=0)

void	fullUpdate ()

void	drawSprite (SLbool doUpdate, SLfloat x, SLfloat y, SLfloat w, SLfloat h)
	Draws the texture as 2D sprite with OpenGL buffers. More...

void	cubeUV2XYZ (SLint index, SLfloat u, SLfloat v, SLfloat &x, SLfloat &y, SLfloat &z)
	Computes the unnormalised vector x,y,z from tex. coords. uv with cubemap index. More...

void	cubeXYZ2UV (SLfloat x, SLfloat y, SLfloat z, SLint &index, SLfloat &u, SLfloat &v)
	Computes the uv and cubemap image index from a unnormalised vector x,y,z. More...

SLstring	filterString (SLint glFilter)
	Returns OpenGL texture filter as string. More...

void	texType (SLTextureType bt)

void	uvIndex (SLbyte i)

void	bumpScale (SLfloat bs)

void	minFiler (SLint minF)

void	magFiler (SLint magF)

void	needsUpdate (SLbool update)

void	textureSize (int width, int height)

void	deleteImageAfterBuild (SLbool delImg)
	If deleteImageAfterBuild is set to true you won't be able to ray trace the scene. More...

SLuint	width ()

SLuint	height ()

SLuint	depth ()

SLbyte	uvIndex ()

SLint	bytesPerPixel ()

SLint	bytesOnGPU ()

SLint	bytesInFile ()

CVVImage &	images ()

SLenum	target () const

SLuint	texID () const

SLTextureType	texType ()

SLfloat	bumpScale () const

SLCol4f	getTexelf (SLfloat u, SLfloat v, SLuint imgIndex=0)
	SLGLTexture::getTexelf returns a pixel color from u & v texture coordinates. More...

SLCol4f	getTexelf (const SLVec3f &cubemapDir)
	SLGLTexture::getTexelf returns a pixel color at the specified cubemap direction. More...

SLbool	hasAlpha ()

SLMat4f	tm ()

SLbool	autoCalcTM3D () const

SLbool	needsUpdate ()

SLstring	typeName ()
	Returns the texture type as string. More...

SLstring	typeShortName ()
	Returns the texture type short. More...

bool	isTexture ()

SLstring	minificationFilterName ()

SLstring	magnificationFilterName ()

void	build2DMipmaps (SLint target, SLuint index)

SLbool	copyVideoImage (SLint camWidth, SLint camHeight, CVPixelFormatGL glFormat, SLuchar *data, SLbool isContinuous, SLbool isTopLeft)
	Copies the image data from a video camera into the current video image. More...

SLbool	copyVideoImage (SLint camWidth, SLint camHeight, CVPixelFormatGL srcFormat, CVPixelFormatGL dstFormat, SLuchar *data, SLbool isContinuous, SLbool isTopLeft)

void	calc3DGradients (SLint sampleRadius, const function< void(int)> &onUpdateProgress)

void	smooth3DGradients (SLint smoothRadius, function< void(int)> onUpdateProgress)

SLVec2f	dudv (SLfloat u, SLfloat v)

Public Member Functions inherited from SLObject
	SLObject (const SLstring &Name="", const SLstring &url="")

virtual	~SLObject ()

void	name (const SLstring &Name)

void	url (const SLstring &url)

const SLstring &	name () const

const SLstring &	url () const

Public Member Functions inherited from SLEventHandler
	SLEventHandler ()

virtual	~SLEventHandler ()

virtual SLbool	onMouseDown (const SLMouseButton button, const SLint x, const SLint y, const SLKey mod)

virtual SLbool	onMouseUp (const SLMouseButton button, const SLint x, const SLint y, const SLKey mod)

virtual SLbool	onMouseMove (const SLMouseButton button, const SLint x, const SLint y, const SLKey mod)

virtual SLbool	onDoubleClick (const SLMouseButton button, const SLint x, const SLint y, const SLKey mod)

virtual SLbool	onMouseWheel (const SLint delta, const SLKey mod)

virtual SLbool	onTouch2Down (const SLint x1, const SLint y1, const SLint x2, const SLint y2)

virtual SLbool	onTouch2Move (const SLint x1, const SLint y1, const SLint x2, const SLint y2)

virtual SLbool	onTouch2Up (const SLint x1, const SLint y1, const SLint x2, const SLint y2)

virtual SLbool	onTouch3Down (const SLint x1, const SLint y1)

virtual SLbool	onTouch3Move (const SLint x1, const SLint y1)

virtual SLbool	onTouch3Up (const SLint x1, const SLint y1)

virtual SLbool	onKeyPress (const SLKey key, const SLKey mod)

virtual SLbool	onKeyRelease (const SLKey key, const SLKey mod)

virtual SLbool	onRotationPYR (const SLfloat pitchRAD, const SLfloat yawRAD, const SLfloat rollRAD)

void	mouseRotationFactor (SLfloat rf)

SLfloat	mouseRotationFactor ()

Private Attributes
SLbool	_calcDirect
	flag to calculate direct illumination More...

SLbool	_calcIndirect
	flag to calculate indirect illumination More...

Additional Inherited Members
Static Public Member Functions inherited from SLRaytracer
static SLuint	numThreads ()

Static Public Member Functions inherited from SLGLTexture
static SLTextureType	detectType (const SLstring &filename)
	Detects the texture type from the filename appendix (See SLTexType def.) More...

static string	internalFormatStr (int internalFormat)
	Returns the internal pixel format from OpenGL. More...

Static Public Attributes inherited from SLGLTexture
static SLfloat	maxAnisotropy = -1.0f
	Returns the derivation as [s,t]. More...

static SLuint	totalNumBytesOnGPU = 0
	Total NO. of bytes used for textures on GPU. More...

Protected Member Functions inherited from SLGLTexture
void	load (const SLstring &filename, SLbool flipVertical=true, SLbool loadGrayscaleIntoAlpha=false)
	Loads the texture, converts color depth & applies vertical mirroring. More...

void	load (const SLVCol4f &colors)
	Loads the 1D color data into an image of height 1. More...

Protected Attributes inherited from SLRaytracer
SLSceneView *	_sv
	Parent sceneview. More...

SLRTState	_state
	RT state;. More...

SLCamera *	_cam
	shortcut to the camera More...

SLfloat	_resolutionFactor
	screen to RT image size factor (default 1.0) More...

SLint	_maxDepth
	Max. allowed recursion depth. More...

SLbool	_doContinuous
	if true state goes into ready again More...

SLbool	_doDistributed
	Flag for parallel distributed RT. More...

SLbool	_doFresnel
	Flag for Fresnel reflection. More...

SLint	_progressPC
	progress in % More...

SLfloat	_renderSec
	Rendering time in seconds. More...

AvgFloat	_raysPerMS
	Averaged rays per ms. More...

SLfloat	_pxSize
	Pixel size. More...

SLVec3f	_EYE
	Camera position. More...

SLVec3f	_LA

SLVec3f	_LU

SLVec3f	_LR
	Camera lookat, lookup, lookright. More...

SLVec3f	_BL
	Bottom left vector. More...

SLint	_nextLine
	next line index to render RT in a thread More...

SLVPixel	_aaPixels
	Vector for antialiasing pixels. More...

SLfloat	_gamma
	gamma correction value More...

SLfloat	_oneOverGamma
	one over gamma correction value More...

SLfloat	_aaThreshold
	threshold for anti aliasing More...

SLint	_aaSamples
	SQRT of uneven num. of AA samples. More...

Protected Attributes inherited from SLGLTexture
CVVImage	_images
	Vector of CVImage pointers. More...

SLuint	_texID
	OpenGL texture ID. More...

SLTextureType	_texType
	See SLTextureType. More...

SLint	_width
	Texture image width in pixels (images exist either in _images or on the GPU or on both) More...

SLint	_height
	Texture image height in pixels (images exist either in _images or on the GPU or on both) More...

SLint	_depth
	3D Texture image depth (images exist either in _images or on the GPU or on both) More...

SLbyte	_uvIndex
	Texture coordinate index in SLMesh (0 = default) More...

SLint	_internalFormat
	Internal OpenGL format. More...

SLint	_bytesPerPixel
	Bytes per texture image pixel (images exist either in _images or on the GPU or on both) More...

SLint	_min_filter
	Minification filter. More...

SLint	_mag_filter
	Magnification filter. More...

SLint	_wrap_s
	Wrapping in s direction. More...

SLint	_wrap_t
	Wrapping in t direction. More...

SLenum	_target
	texture target More...

SLMat4f	_tm
	texture matrix More...

SLuint	_bytesOnGPU
	NO. of bytes on GPU. More...

SLuint	_bytesInFile
	NO. of bytes in file. More...

SLbool	_autoCalcTM3D
	Flag if texture matrix should be calculated from AABB for 3D mapping. More...

SLfloat	_bumpScale
	Bump mapping scale factor. More...

SLbool	_resizeToPow2
	Flag if image should be resized to n^2. More...

SLGLVertexArray	_vaoSprite
	Vertex array object for sprite rendering. More...

std::atomic< bool >	_needsUpdate {}
	Flag if image needs an single update. More...

std::mutex	_mutex
	Mutex to protect parallel access (used in ray tracing) More...

SLbool	_deleteImageAfterBuild
	Flag if images should be deleted after build on GPU. More...

SLbool	_compressedTexture = false
	True for compressed texture format on GPU. More...

Protected Attributes inherited from SLObject
SLstring	_name
	name of an object More...

SLstring	_url
	uniform resource locator More...

Protected Attributes inherited from SLEventHandler
SLfloat	_mouseRotationFactor
	Mouse rotation sensibility. More...

SLfloat	_keyboardDeltaPos
	Delta dist. for keyboard translation. More...

Detailed Description

Classic Monte Carlo Pathtracing algorithm for real global illumination.

Constructor & Destructor Documentation

◆ SLPathtracer()

SLPathtracer::SLPathtracer ( )

◆ ~SLPathtracer()

SLPathtracer::~SLPathtracer ( )

inline

Member Function Documentation

◆ calcDirect() [1/2]

SLbool SLPathtracer::calcDirect ( ) const

inline

◆ calcDirect() [2/2]

void SLPathtracer::calcDirect ( SLbool di )

inline

◆ calcIndirect() [1/2]

SLbool SLPathtracer::calcIndirect ( ) const

inline

◆ calcIndirect() [2/2]

void SLPathtracer::calcIndirect ( SLbool ii )

inline

◆ render()

SLbool SLPathtracer::render ( SLSceneView * sv )

Main render function. The Path Tracing algorithm starts from here

◆ renderSlices()

void SLPathtracer::renderSlices	(	bool	isMainThread,
		SLint	currentSample,
		SLuint	threadNum
	)

Renders a slice of 4px width.

◆ saveImage()

void SLPathtracer::saveImage ( )

virtual

Saves the current PT image as PNG image.

Reimplemented from SLRaytracer.

◆ shade()

SLCol4f SLPathtracer::shade	(	SLRay *	ray,
		SLCol4f *	mat
	)

Calculates direct illumination for intersection point of ray

◆ trace()

SLCol4f SLPathtracer::trace	(	SLRay *	ray,
		SLbool	em
	)

Recursively traces ray in scene.

Member Data Documentation

◆ _calcDirect

SLbool SLPathtracer::_calcDirect

private

flag to calculate direct illumination

◆ _calcIndirect

SLbool SLPathtracer::_calcIndirect

private

flag to calculate indirect illumination

The documentation for this class was generated from the following files:

Public Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ SLPathtracer()

◆ ~SLPathtracer()

Member Function Documentation

◆ calcDirect() [1/2]

◆ calcDirect() [2/2]

◆ calcIndirect() [1/2]

◆ calcIndirect() [2/2]

◆ render()

◆ renderSlices()

◆ saveImage()

◆ shade()

◆ trace()

Member Data Documentation

◆ _calcDirect

◆ _calcIndirect