mesh_conv::MC_grid_3d_scalar Class Reference

3D grid for scalar density (use float to save space) More...

#include <MC_grid_3d_scalar.hpp>

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List of all members.

Public Member Functions
	MC_grid_3d_scalar ()
	empty constructor
	MC_grid_3d_scalar (const MC_int_vector &given_size, const MC_v3d &real_size=MC_v3d(1, 1, 1), const MC_v3d &offset=MC_v3d(0, 0, 0))
	direct constructor
const MC_int_vector &	size () const
	get size
bool	is_within_bound (const MC_v3d &x) const
	check if a position is within the bounds (real coordinates)
bool	is_within_bound_voxel (const MC_int_vector &x) const
	check if a position is within the bounds (local voxel coordinates)
void	fill (const float &value)
	fill with a constant value
const MC_v3d &	dimension () const
	get real size
MC_v3d &	dimension ()
	get real size
const MC_v3d &	offset () const
	get offset
MC_v3d &	offset ()
	get offset
MC_v3d	convert_real_to_voxel_index (const MC_v3d &x) const
	convert from real coordinates to voxel index
MC_v3d	convert_voxel_index_to_real (const MC_v3d &u) const
	convert from voxel index to real coordinates
const float &	get (const MC_int_vector &u) const
	get value from a given voxel index
float &	get (const MC_int_vector &u)
	get value from a given voxel index
void	set (const MC_int_vector &u, const float &value)
	set value from a given voxel index
float	operator() (const MC_v3d &x) const
	get value using linear interpolation
void	add_potential (const implicit::MC_potential_sphere &sphere_implicit)
	add an implicit sphere into the grid by sampling values
float	linear_interpolation (const MC_v3d &x) const
	compute linear interpolation
Private Attributes
MC_grid_3d< float >	potential
	internal grid
MC_v3d	dimension_internal
	dimension conversion from voxel index to real value
MC_v3d	offset_internal
	offset conversion from voxel index to real value

---

Detailed Description

3D grid for scalar density (use float to save space)

Definition at line 17 of file MC_grid_3d_scalar.hpp.

---

Constructor & Destructor Documentation

mesh_conv::MC_grid_3d_scalar::MC_grid_3d_scalar

(

)

empty constructor

Definition at line 7 of file MC_grid_3d_scalar.cpp.

            :dimension_internal(MC_v3d(1,1,1)),offset_internal(MC_v3d(0,0,0))
    {}

mesh_conv::MC_grid_3d_scalar::MC_grid_3d_scalar	(	const MC_int_vector &	given_size,
		const MC_v3d &	real_size = MC_v3d(1,1,1),
		const MC_v3d &	offset = MC_v3d(0,0,0)
	)

direct constructor

Definition at line 11 of file MC_grid_3d_scalar.cpp.

References potential.

            :dimension_internal(real_size),offset_internal(offset)
    {
        potential=MC_grid_3d<float>(given_size);
    }

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Member Function Documentation

void mesh_conv::MC_grid_3d_scalar::add_potential

(

const implicit::MC_potential_sphere &

sphere_implicit

)

add an implicit sphere into the grid by sampling values

Definition at line 133 of file MC_grid_3d_scalar.cpp.

References mesh_conv::MC_sphere_geometry::center(), convert_real_to_voxel_index(), mesh_conv::MC_sphere_geometry::radius(), and mesh_conv::implicit::MC_potential_sphere::sphere().

Referenced by update_potential().

    {
        const MC_v3d& center=sphere_implicit.sphere().center();
        const double& radius=sphere_implicit.sphere().radius();

        MC_v3d center_voxel=convert_real_to_voxel_index(center);
        MC_int_vector center_voxel_integer=MC_int_vector(static_cast<int>(center_voxel[0]+0.5),static_cast<int>(center_voxel[1]+0.5),static_cast<int>(center_voxel[2]+0.5));


        // ******************************* //
        // TO DO: calculer la fonction de potentiel sur certains voxels et l'ajouter a la grille
        //
        // pour tout les voxels du voisinage
        //   get(voxel) += sphere_implicit(position_du_voxel_dans_l'espace)
        // ******************************* //

    }

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MC_v3d mesh_conv::MC_grid_3d_scalar::convert_real_to_voxel_index

(

const MC_v3d &

x

)

const

convert from real coordinates to voxel index

Definition at line 59 of file MC_grid_3d_scalar.cpp.

References dimension_internal, offset_internal, and size().

Referenced by add_potential(), and linear_interpolation().

    {
        MC_v3d u;
        for(unsigned int k_dim=0;k_dim<3;++k_dim)
            u[k_dim]=(x[k_dim]-offset_internal[k_dim])/dimension_internal[k_dim]*size()[k_dim];
        return u;
    }

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MC_v3d mesh_conv::MC_grid_3d_scalar::convert_voxel_index_to_real

(

const MC_v3d &

u

)

const

convert from voxel index to real coordinates

Definition at line 66 of file MC_grid_3d_scalar.cpp.

References dimension_internal, offset_internal, and size().

Referenced by mesh_conv::MC_grid_3d_scalar_marching_cube::create_polygon().

    {
        MC_v3d x;
        for(unsigned int k_dim=0;k_dim<3;++k_dim)
            x[k_dim]=u[k_dim]/static_cast<double>(size()[k_dim])*dimension_internal[k_dim]+offset_internal[k_dim];
        return x;
    }

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MC_v3d & mesh_conv::MC_grid_3d_scalar::dimension

(

)

get real size

Definition at line 45 of file MC_grid_3d_scalar.cpp.

References dimension_internal.

    {
        return dimension_internal;
    }

const MC_v3d & mesh_conv::MC_grid_3d_scalar::dimension

(

)

const

get real size

Definition at line 41 of file MC_grid_3d_scalar.cpp.

References dimension_internal.

    {
        return dimension_internal;
    }

void mesh_conv::MC_grid_3d_scalar::fill

(

const float &

value

)

fill with a constant value

Definition at line 37 of file MC_grid_3d_scalar.cpp.

References mesh_conv::MC_grid_3d< VALUE >::fill(), and potential.

Referenced by update_potential().

    {
        potential.fill(value);
    }

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float & mesh_conv::MC_grid_3d_scalar::get

(

const MC_int_vector &

u

)

get value from a given voxel index

Definition at line 78 of file MC_grid_3d_scalar.cpp.

References mesh_conv::MC_grid_3d< VALUE >::get(), and potential.

    {
        return potential.get(u);
    }

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const float & mesh_conv::MC_grid_3d_scalar::get

(

const MC_int_vector &

u

)

const

get value from a given voxel index

Definition at line 74 of file MC_grid_3d_scalar.cpp.

References mesh_conv::MC_grid_3d< VALUE >::get(), and potential.

Referenced by mesh_conv::MC_grid_3d_scalar_marching_cube::marching_cube().

    {
        return potential.get(u);
    }

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bool mesh_conv::MC_grid_3d_scalar::is_within_bound

(

const MC_v3d &

x

)

const

check if a position is within the bounds (real coordinates)

Definition at line 18 of file MC_grid_3d_scalar.cpp.

References dimension_internal, and offset_internal.

Referenced by linear_interpolation().

    {
        MC_v3d y=x-offset_internal;
        if(y[0]>=0 && y[0]<dimension_internal[0])
            if(y[1]>=0 && y[1]<dimension_internal[1])
                if(y[2]>=0 && y[2]<dimension_internal[2])
                    return true;
        return false;
    }

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bool mesh_conv::MC_grid_3d_scalar::is_within_bound_voxel

(

const MC_int_vector &

x

)

const

check if a position is within the bounds (local voxel coordinates)

Definition at line 27 of file MC_grid_3d_scalar.cpp.

References size().

Referenced by mesh_conv::MC_grid_3d_scalar_marching_cube::marching_cube().

    {
        MC_int_vector dim=size();
        if(x[0]>=0 && x[0]<dim[0])
            if(x[1]>=0 && x[1]<dim[1])
                if(x[2]>=0 && x[2]<dim[2])
                    return true;
        return false;
    }

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float mesh_conv::MC_grid_3d_scalar::linear_interpolation

(

const MC_v3d &

x

)

const

compute linear interpolation

Definition at line 91 of file MC_grid_3d_scalar.cpp.

References convert_real_to_voxel_index(), is_within_bound(), and size().

Referenced by operator()().

    {
        if(is_within_bound(x)==false)
            return 0.0;



        MC_v3d u=convert_real_to_voxel_index(x);
        MC_int_vector u0=MC_int_vector(static_cast<int>(u[0]),
                                       static_cast<int>(u[1]),
                                       static_cast<int>(u[2])
                                       );
        MC_v3d alpha=u-MC_v3d(u0[0],u0[1],u0[2]);



        //special case at the boundaries
        if(u0[0]==0 || u0[0]==size()[0]-1 || u0[1]==0 || u0[1]==size()[1]-1 || u0[2]==0 || u0[2]==size()[2]-1)
            return get(u0);

        //linear interpolation
        float x000=get(u0+MC_int_vector(0,0,0));
        float x001=get(u0+MC_int_vector(0,0,1));
        float x010=get(u0+MC_int_vector(0,1,0));
        float x011=get(u0+MC_int_vector(0,1,1));
        float x100=get(u0+MC_int_vector(1,0,0));
        float x101=get(u0+MC_int_vector(1,0,1));
        float x110=get(u0+MC_int_vector(1,1,0));
        float x111=get(u0+MC_int_vector(1,1,1));

        float y=x000*(1-alpha[0])*(1-alpha[1])*(1-alpha[2]) +
                x001*(1-alpha[0])*(1-alpha[1])*(  alpha[2]) +
                x010*(1-alpha[0])*(  alpha[1])*(1-alpha[2]) +
                x011*(1-alpha[0])*(  alpha[1])*(  alpha[2]) +
                x100*(  alpha[0])*(1-alpha[1])*(1-alpha[2]) +
                x101*(  alpha[0])*(1-alpha[1])*(  alpha[2]) +
                x110*(  alpha[0])*(  alpha[1])*(1-alpha[2]) +
                x111*(  alpha[0])*(  alpha[1])*(  alpha[2]) ;
        return y;
    }

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MC_v3d & mesh_conv::MC_grid_3d_scalar::offset

(

)

get offset

Definition at line 54 of file MC_grid_3d_scalar.cpp.

References offset_internal.

    {
        return offset_internal;
    }

const MC_v3d & mesh_conv::MC_grid_3d_scalar::offset

(

)

const

get offset

Definition at line 50 of file MC_grid_3d_scalar.cpp.

References offset_internal.

    {
        return offset_internal;
    }

float mesh_conv::MC_grid_3d_scalar::operator()

(

const MC_v3d &

x

)

const

get value using linear interpolation

Definition at line 86 of file MC_grid_3d_scalar.cpp.

References linear_interpolation().

    {
        return linear_interpolation(x);
    }

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void mesh_conv::MC_grid_3d_scalar::set	(	const MC_int_vector &	u,
		const float &	value
	)

set value from a given voxel index

Definition at line 82 of file MC_grid_3d_scalar.cpp.

References mesh_conv::MC_grid_3d< VALUE >::get(), and potential.

    {
        potential.get(u)=value;
    }

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const MC_int_vector & mesh_conv::MC_grid_3d_scalar::size

(

)

const

get size

Definition at line 16 of file MC_grid_3d_scalar.cpp.

References potential, and mesh_conv::MC_grid_3d< VALUE >::size().

Referenced by convert_real_to_voxel_index(), convert_voxel_index_to_real(), mesh_conv::MC_grid_3d_scalar_marching_cube::create_polygon(), is_within_bound_voxel(), linear_interpolation(), and mesh_conv::MC_grid_3d_scalar_marching_cube::marching_cube().

    {return potential.size();}

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---

Member Data Documentation

MC_v3d mesh_conv::MC_grid_3d_scalar::dimension_internal [private]

dimension conversion from voxel index to real value

Definition at line 123 of file MC_grid_3d_scalar.hpp.

Referenced by convert_real_to_voxel_index(), convert_voxel_index_to_real(), dimension(), and is_within_bound().

MC_v3d mesh_conv::MC_grid_3d_scalar::offset_internal [private]

offset conversion from voxel index to real value

Definition at line 125 of file MC_grid_3d_scalar.hpp.

Referenced by convert_real_to_voxel_index(), convert_voxel_index_to_real(), is_within_bound(), and offset().

MC_grid_3d<float> mesh_conv::MC_grid_3d_scalar::potential [private]

internal grid

Definition at line 120 of file MC_grid_3d_scalar.hpp.

Referenced by fill(), get(), MC_grid_3d_scalar(), set(), and size().

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

• /home/damien/work/2010_04_M1_info/TP/TP_glut_etudiant/local/header/MC_grid_3d_scalar.hpp
• /home/damien/work/2010_04_M1_info/TP/TP_glut_etudiant/local/src/MC_grid_3d_scalar.cpp