#include <t4_gpu_scan.h>

Classes
struct	event_type
Public Types
typedef real_type_	real_type
Public Member Functions
template<typename surface_mesh , typename volume_mesh , typename lut_container , typename point_container , typename grid_type >
bool	run (surface_mesh &surface, volume_mesh const &shell, lut_container &lut, point_container const &points, real_type const &thickness, grid_type &phi, bool use_unsigned)
Protected Types
typedef std::vector< event_type >	event_container
typedef event_container::iterator	event_iterator
Protected Member Functions
template<typename grid_type >
void	set_gl_state (grid_type const &phi)
template<typename grid_type >
void	init_fbo (grid_type const &phi)
void	disable_fbo ()
void	store_gl_state ()
void	restore_gl_state ()
template<typename grid_type >
bool	init_rendering (grid_type const &phi, bool use_unsigned)
void	cleanup_rendering ()
template<typename surface_mesh , typename point_container , typename volume_mesh , typename grid_type >
void	init (surface_mesh &surface, volume_mesh const &shell, point_container const &points, grid_type const &phi, point_container &edge_normals, bool use_unsigned)
void	update_status_set (real_type const &z)
template<typename volume_mesh , typename lut_container , typename point_container >
void	draw_slice (volume_mesh const &shell, lut_container &lut, point_container const &points, real_type const &z, point_container &edge_normals)
template<typename volume_mesh , typename lut_container , typename point_container >
void	draw_slice_unsigned (volume_mesh const &shell, lut_container &lut, point_container const &points, real_type const &z)
Protected Attributes
real_type	m_z_value
	The current z-value of the sweep line.
real_type	m_delta_z_value
	The increment in z-value when sweep line moves along z-axis.
real_type	m_max_z_value
	The maximum z-value.
real_type	m_min_z_value
	The minimum z-value.
event_container	m_events
	Event points for sweep line (plane) algorithm.
event_container	m_status
	The status set, i.e. the event points lying on the sweep line.
event_iterator	m_last_event
	Iterator to the last event point lying just before the sweep line. This is the place to start searching for a new status set when sweep line moves.
real_type	m_thickness
	Narrowband value used in distance field computation.
OpenTissue::texture::texture2D_pointer	m_distance_texture [2]
	The texture used as a data array.
gl::FramebufferObject	m_fbo [2]
	The framebuffer object used for rendering to the texture.
gl::renderbuffer_pointer	m_rb_depth [2]
	Optional: The renderbuffer object used for depth.
cg::Program	m_fragment_program
	the fragment program used
GLint	m_state_current_drawbuf
GLint	m_state_viewport [4]
	Temporary storage for original viewport settings.
float	m_state_color_clear_value [4]
	Temporary storage for original clear color.
bool	m_state_depth_test
GLint	m_state_depth_func
float	m_state_depth_clear_value

template<typename real_type_>
class OpenTissue::detail::T4GPUScan< real_type_ >

Member Typedef Documentation

template<typename real_type_>

typedef std::vector<event_type> OpenTissue::detail::T4GPUScan< real_type_ >::event_container [protected]

template<typename real_type_>

typedef event_container::iterator OpenTissue::detail::T4GPUScan< real_type_ >::event_iterator [protected]

template<typename real_type_>

typedef real_type_ OpenTissue::detail::T4GPUScan< real_type_ >::real_type

Member Function Documentation

template<typename real_type_>

void OpenTissue::detail::T4GPUScan< real_type_ >::cleanup_rendering ( ) [inline, protected]

template<typename real_type_>

void OpenTissue::detail::T4GPUScan< real_type_ >::disable_fbo ( ) [inline, protected]

Disable fbo related stuff

template<typename real_type_>

template<typename volume_mesh , typename lut_container , typename point_container >

void OpenTissue::detail::T4GPUScan< real_type_ >::draw_slice	(	volume_mesh const &	shell,
		lut_container &	lut,
		point_container const &	points,
		real_type const &	z,
		point_container &	edge_normals
	)			`[inline, protected]`

Draw Slice. This method intersects all tetrahedra in the status set with the plane that corresponds to the current position of the sweep-line. The cross sections are then rendered.

Parameters:

	shell	A tetrahedron mesh, representing the shell layer that should be scan-converted into a signed distance grid.
	lut	Lookup Table. This table holds a correspondence map between tetrahedra and the polygonal triangular faces from which they originate. That is one can lookup the triangular face lying closest to all points inside a tetrahedron than to any other triangular faces!!!
	points	The coordinates of the vertices in the shell mesh. That is the i'th entry holds the coordinate of the i'th vertex.
	z	The current position of the sweep-line.

template<typename real_type_>

template<typename volume_mesh , typename lut_container , typename point_container >

void OpenTissue::detail::T4GPUScan< real_type_ >::draw_slice_unsigned	(	volume_mesh const &	shell,
		lut_container &	lut,
		point_container const &	points,
		real_type const &	z
	)			`[inline, protected]`

template<typename real_type_>

template<typename surface_mesh , typename point_container , typename volume_mesh , typename grid_type >

void OpenTissue::detail::T4GPUScan< real_type_ >::init	(	surface_mesh &	surface,
		volume_mesh const &	shell,
		point_container const &	points,
		grid_type const &	phi,
		point_container &	edge_normals,
		bool	use_unsigned
	)			`[inline, protected]`

Initialization.

Sets up an event-list for the sweep-line algorithm. Also sets up starting and ending positions along the sweep-line as well as the increment along the sweep-line.

Parameters:

	shell	A tetrahedron mesh, representing the shell layer that should be scan-converted into a signed distance grid.
	points	The coordinates of the vertices in the shell mesh. That is the i'th entry holds the coordinate of the i'th vertex.
	phi	The grid that is supposed to hold the signed distance grid upon completion of the algorithm.

template<typename real_type_>

template<typename grid_type >

void OpenTissue::detail::T4GPUScan< real_type_ >::init_fbo ( grid_type const & phi ) [inline, protected]

Setup the FrameBufferObject stuff.

template<typename real_type_>

template<typename grid_type >

bool OpenTissue::detail::T4GPUScan< real_type_ >::init_rendering	(	grid_type const &	phi,
		bool	use_unsigned
	)			`[inline, protected]`

template<typename real_type_>

void OpenTissue::detail::T4GPUScan< real_type_ >::restore_gl_state ( ) [inline, protected]

Restores the OpenGl state

template<typename real_type_>

template<typename surface_mesh , typename volume_mesh , typename lut_container , typename point_container , typename grid_type >

bool OpenTissue::detail::T4GPUScan< real_type_ >::run	(	surface_mesh &	surface,
		volume_mesh const &	shell,
		lut_container &	lut,
		point_container const &	points,
		real_type const &	thickness,
		grid_type &	phi,
		bool	use_unsigned
	)			`[inline]`

Run Tetrahedron Scan Conversion Algorithm.

Parameters:

	shell	A tetrahedron mesh, representing the shell layer that should be scan-converted into a signed distance grid.
	lut	Lookup Table. This table holds a correspondence map between tetrahedra and the polygonal triangular faces from which they originate. That is one can lookup the triangular face lying closest to all points inside a tetrahedron than to any other triangular faces!!!
	points	The coordinates of the vertices in the shell mesh. That is the i'th entry holds the coordinate of the i'th vertex.
	phi	The grid that is supposed to hold the signed distance grid upon completion of the algorithm.
	use_unsigned	If this boolean flag is set to true then the unsigned version of the algorithm is used.