tools::sg::tex_quadrilateral Class Reference

Inheritance diagram for tools::sg::tex_quadrilateral:

Collaboration diagram for tools::sg::tex_quadrilateral:

Public Member Functions
virtual void *	cast (const std::string &a_class) const
virtual const desc_fields &	node_desc_fields () const
virtual void	render (render_action &a_action)
virtual void	pick (pick_action &a_action)
virtual void	bbox (bbox_action &a_action)
virtual bool	intersect_value (std::ostream &, intersect_type, const line< vec3f > &a_line, std::string &a_s) const
	tex_quadrilateral ()
virtual	~tex_quadrilateral ()
	tex_quadrilateral (const tex_quadrilateral &a_from)
tex_quadrilateral &	operator= (const tex_quadrilateral &a_from)
Public Member Functions inherited from tools::sg::node
virtual const std::string &	s_cls () const =0
virtual node *	copy () const =0
virtual unsigned int	cls_version () const
virtual void	search (search_action &a_action)
virtual void	get_matrix (get_matrix_action &a_action)
virtual bool	write (write_action &a_action)
virtual void	event (event_action &)
virtual bool	read (read_action &a_action)
virtual void	is_visible (visible_action &)
virtual void	protocol_one_fields (std::vector< field * > &a_fields) const
virtual bool	draw_in_frame_buffer () const
virtual bool	touched ()
virtual void	reset_touched ()
	node ()
virtual	~node ()
void	touch ()
field &	field_from_desc (const field_desc &a_desc) const
void	dump_field_descs (std::ostream &a_out) const
field *	find_field_by_name (const std::string &a_name) const
Public Member Functions inherited from tools::sg::gstos
size_t	num_gstos () const
Public Member Functions inherited from tools::sg::base_tex
	base_tex ()
virtual	~base_tex ()
	base_tex (const base_tex &a_from)
base_tex &	operator= (const base_tex &a_from)

Public Attributes
sf< bool >	show_border
mf_vec< vec3f, float >	corners
Public Attributes inherited from tools::sg::base_tex
sf_img< byte >	img
sf_vec< colorf, float >	back_color
sf< bool >	expand
sf< unsigned int >	limit
sf< bool >	nearest

Protected Types
typedef float	f12[12]
typedef float	f18[18]

Protected Member Functions
void	update_sg (std::ostream &a_out)
bool	img_ndc_value (float a_x, float a_y, std::string &a_s) const
bool	point_2_img_ndc (const vec3f &a_point, float &a_x, float &a_y) const
bool	line_2_img_ndc (const line< vec3f > &a_line, float &a_x, float &a_y) const
bool	img_ndc_2_point (float a_x, float a_y, vec3f &a_point) const
void	_front (f12 &a_front, f12 &a_nms, float a_epsil=0.0f)
void	_back (f12 &a_back)
void	_tris (f18 &a_tris, f18 &a_nms)
Protected Member Functions inherited from tools::sg::node
	node (const node &)
node &	operator= (const node &)
void	add_field (field *a_field)
bool	write_fields (write_action &a_action)
bool	read_fields (read_action &a_action)
field_desc::offset_t	field_offset (const field *a_field) const
field *	find_field (const field_desc &a_rdesc) const
void	check_fields (std::ostream &a_out) const
Protected Member Functions inherited from tools::sg::gstos
	gstos ()
virtual	~gstos ()
	gstos (const gstos &)
gstos &	operator= (const gstos &a_from)
unsigned int	get_tex_id (std::ostream &a_out, render_manager &a_mgr, const img_byte &a_img, bool a_NEAREST)
virtual unsigned int	create_gsto (std::ostream &, render_manager &)
unsigned int	get_gsto_id (std::ostream &a_out, render_manager &a_mgr)
void	clean_gstos ()
void	clean_gstos (render_manager *a_mgr)
unsigned int	_find (render_manager *a_mgr)
Protected Member Functions inherited from tools::sg::base_tex
void	_update_sg_ (std::ostream &a_out)
void	set_tcs (float a_tcs[8])

Protected Attributes
vec3f	m_normal
bool	m_pick_bbox_check_image
Protected Attributes inherited from tools::sg::gstos
std::vector< std::pair< unsigned int, render_manager * > >	m_gstos
Protected Attributes inherited from tools::sg::base_tex
img_byte	m_img

Additional Inherited Members
Public Types inherited from tools::sg::base_tex
enum	intersect_type { intersect_down, intersect_move, intersect_up }
Static Protected Member Functions inherited from tools::sg::base_tex
static void	dump (std::ostream &a_out, const std::string &a_cmt, const img_byte &a_img)
static void	dump_not_null (std::ostream &a_out, const std::string &a_cmt, const img_byte &a_img)

Detailed Description

Definition at line 23 of file tex_quadrilateral.

Member Typedef Documentation

f12

typedef float tools::sg::tex_quadrilateral::f12[12]

protected

Definition at line 329 of file tex_quadrilateral.

f18

typedef float tools::sg::tex_quadrilateral::f18[18]

protected

Definition at line 386 of file tex_quadrilateral.

Constructor & Destructor Documentation

tex_quadrilateral() [1/2]

tools::sg::tex_quadrilateral::tex_quadrilateral ( )

inline

Definition at line 143 of file tex_quadrilateral.

  :parent()
  ,base_tex()
  ,show_border(false)
  ,corners()
  ,m_pick_bbox_check_image(true)
  {
    add_fields();
    corners.add(vec3f(-1,-1,0));
    corners.add(vec3f( 1,-1,0));
    corners.add(vec3f( 1, 1,0));
    corners.add(vec3f(-1, 1,0));
  }

~tex_quadrilateral()

virtual tools::sg::tex_quadrilateral::~tex_quadrilateral ( )

inlinevirtual

Definition at line 156 of file tex_quadrilateral.

{}

tex_quadrilateral() [2/2]

tools::sg::tex_quadrilateral::tex_quadrilateral ( const tex_quadrilateral &  a_from )

inline

Definition at line 158 of file tex_quadrilateral.

  :parent(a_from)
  ,gstos(a_from)
  ,base_tex(a_from)
  ,show_border(a_from.show_border)
  ,corners(a_from.corners)
  ,m_pick_bbox_check_image(a_from.m_pick_bbox_check_image)
  {
    add_fields();
  }

Member Function Documentation

_back()

void tools::sg::tex_quadrilateral::_back ( f12 &  a_back )

inlineprotected

Definition at line 366 of file tex_quadrilateral.

                          {
    const std::vector<vec3f>& cs = corners.values();
 
    a_back[0] =  cs[1].x();
    a_back[1] =  cs[1].y();
    a_back[2] =  cs[1].z();
 
    a_back[3] =  cs[0].x();
    a_back[4] =  cs[0].y();
    a_back[5] =  cs[0].z();
 
    a_back[6] =  cs[3].x();
    a_back[7] =  cs[3].y();
    a_back[8] =  cs[3].z();
 
    a_back[ 9] = cs[2].x();
    a_back[10] = cs[2].y();
    a_back[11] = cs[2].z();
  }

_front()

void tools::sg::tex_quadrilateral::_front ( f12 &  a_front, f12 &  a_nms, float  a_epsil = 0.0f  )

inlineprotected

Definition at line 330 of file tex_quadrilateral.

                                                            {
    const std::vector<vec3f>& cs = corners.values();
 
    a_front[0] =  cs[0].x()-a_epsil;
    a_front[1] =  cs[0].y()-a_epsil;
    a_front[2] =  cs[0].z();
 
    a_front[3] =  cs[1].x()+a_epsil;
    a_front[4] =  cs[1].y()-a_epsil;
    a_front[5] =  cs[1].z();
 
    a_front[6] =  cs[2].x()+a_epsil;
    a_front[7] =  cs[2].y()+a_epsil;
    a_front[8] =  cs[2].z();
 
    a_front[ 9] = cs[3].x()-a_epsil;
    a_front[10] = cs[3].y()+a_epsil;
    a_front[11] = cs[3].z();
 
    a_nms[0] = m_normal.x();
    a_nms[1] = m_normal.y();
    a_nms[2] = m_normal.z();
 
    a_nms[3] = m_normal.x();
    a_nms[4] = m_normal.y();
    a_nms[5] = m_normal.z();
 
    a_nms[6] = m_normal.x();
    a_nms[7] = m_normal.y();
    a_nms[8] = m_normal.z();
 
    a_nms[9]  = m_normal.x();
    a_nms[10] = m_normal.y();
    a_nms[11] = m_normal.z();
  }

_tris()

void tools::sg::tex_quadrilateral::_tris ( f18 &  a_tris, f18 &  a_nms  )

inlineprotected

Definition at line 387 of file tex_quadrilateral.

                                    {
    f12 back;
    _back(back);
 
    a_tris[0] = back[0];
    a_tris[1] = back[1];
    a_tris[2] = back[2];
 
    a_tris[3] = back[3];
    a_tris[4] = back[4];
    a_tris[5] = back[5];
 
    a_tris[6] = back[6];
    a_tris[7] = back[7];
    a_tris[8] = back[8];
    //
    a_tris[9]  = back[6];
    a_tris[10] = back[7];
    a_tris[11] = back[8];
 
    a_tris[12] = back[9];
    a_tris[13] = back[10];
    a_tris[14] = back[11];
 
    a_tris[15] = back[0];
    a_tris[16] = back[1];
    a_tris[17] = back[2];
 
    a_nms[0] = -m_normal.x();
    a_nms[1] = -m_normal.y();
    a_nms[2] = -m_normal.z();
 
    a_nms[3] = -m_normal.x();
    a_nms[4] = -m_normal.y();
    a_nms[5] = -m_normal.z();
 
    a_nms[6] = -m_normal.x();
    a_nms[7] = -m_normal.y();
    a_nms[8] = -m_normal.z();
    //
    a_nms[9]  = -m_normal.x();
    a_nms[10] = -m_normal.y();
    a_nms[11] = -m_normal.z();
 
    a_nms[12] = -m_normal.x();
    a_nms[13] = -m_normal.y();
    a_nms[14] = -m_normal.z();
 
    a_nms[15] = -m_normal.x();
    a_nms[16] = -m_normal.y();
    a_nms[17] = -m_normal.z();
  }

bbox()

virtual void tools::sg::tex_quadrilateral::bbox ( bbox_action &  a_action )

inlinevirtual

Reimplemented from tools::sg::node.

Definition at line 124 of file tex_quadrilateral.

                                           {
    if(touched()) {
      update_sg(a_action.out());
      reset_touched();
    }
    if(m_pick_bbox_check_image) if(m_img.is_empty()) return;
    if(corners.size()!=4) return;
    f12 xyzs,nms;
    _front(xyzs,nms);
    a_action.add_points(12,xyzs);
  }

cast()

virtual void* tools::sg::tex_quadrilateral::cast ( const std::string &  a_class ) const

inlinevirtual

Reimplemented from tools::sg::base_tex.

Definition at line 26 of file tex_quadrilateral.

                                                     {
    {if(void* p = cmp_cast<tex_quadrilateral>(this,a_class)) return p;}
    {if(void* p = base_tex::cast(a_class)) return p;}
    return parent::cast(a_class);
  }

img_ndc_2_point()

bool tools::sg::tex_quadrilateral::img_ndc_2_point ( float  a_x, float  a_y, vec3f &  a_point  ) const

inlineprotected

Definition at line 258 of file tex_quadrilateral.

                                                                 {
    if(corners.size()!=4) {a_point.set_value(0,0,0);return false;}
    // In fact, in the below corners[2] is not used.
 
    // we assume that :
    //  corners[0] is the bottom-left of image
    //  corners[1] is the bottom-right of image
    //  corners[2] is the top-right of image
    //  corners[3] is the top-left of image
    vec3f x_axis = corners[1]-corners[0];
    float l_01 = x_axis.normalize();
    if(l_01==0.0f) {a_point.set_value(0,0,0);return false;}
    vec3f y_axis = corners[3]-corners[0];
    float l_03 = y_axis.normalize();
    if(l_03==0.0f) {a_point.set_value(0,0,0);return false;}
 
    float alpha = x_axis.dot(y_axis);
    //float alpha_sq = alpha*alpha;
    //if(alpha_sq==1.0f) {a_point.set_value(0,0,0);return false;}
 
    float lambda = a_x*l_01;
    float mu = a_y*l_03;
 
    // px-alpha*py = lambda*(1.0f-alpha_sq);
    // py-alpha*px = mu*(1-alpha_sq);
 
    // px-alpha*(alpha*px+mu*(1-alpha_sq)) = lambda*(1-alpha_sq)
    // px*(1-alpha_sq)-mu*alpha*(1-alpha_sq)) = lambda*(1-alpha_sq)
    // px*(1-alpha_sq) = lambda*(1-alpha_sq)+mu*alpha*(1-alpha_sq));
    // px = lambda+mu*alpha;
 
    // py = lambda*alpha+mu;
 
    float px = lambda+mu*alpha;
    float py = lambda*alpha+mu;
 
    vec3f Op = px*x_axis+py*y_axis;
 
    a_point = Op+corners[0];
 
    return true;
  }

img_ndc_value()

bool tools::sg::tex_quadrilateral::img_ndc_value ( float  a_x, float  a_y, std::string &  a_s  ) const

inlineprotected

Definition at line 190 of file tex_quadrilateral.

                                                               {
    const img_byte& _img = img.value();
    if(_img.is_empty()) {a_s.clear();return false;}
 
    int ix = int(float(_img.width())*a_x);
    int iy = int(float(_img.height())*a_y);
 
    //rgb of pixel :
    std::vector<unsigned char> pixel;
    if((ix<0)||(iy<0)||!_img.pixel(ix,iy,pixel)) {a_s.clear();return false;}
 
    a_s.clear();
    for(unsigned int ipix=0;ipix<pixel.size();ipix++) {
      if(ipix) a_s += " ";
      if(!numas<float>(float(pixel[ipix])/255.0f,a_s)){}
    }
 
    return true;
  }

intersect_value()

virtual bool tools::sg::tex_quadrilateral::intersect_value ( std::ostream &  , intersect_type  , const line< vec3f > &  a_line, std::string &  a_s  ) const

inlinevirtual

Implements tools::sg::base_tex.

Definition at line 136 of file tex_quadrilateral.

                                                                                                          {
    // a_line is in local world coordinate.
    float x,y;
    if(!line_2_img_ndc(a_line,x,y)) {a_s.clear();return false;}
    return img_ndc_value(x,y,a_s);
  }

line_2_img_ndc()

bool tools::sg::tex_quadrilateral::line_2_img_ndc ( const line< vec3f > &  a_line, float &  a_x, float &  a_y  ) const

inlineprotected

Definition at line 248 of file tex_quadrilateral.

                                                                             {
    // a_line is in local world coordinate.
    if(corners.size()!=4) {a_x = 0;a_y = 0;return false;}
    // In fact corners[2] is not used, only [0,1,3].
    plane<vec3f> plane(corners[0],corners[1],corners[3]);
    vec3f p;
    if(!plane.intersect(a_line,p)) {a_x = 0;a_y = 0;return false;}
    return point_2_img_ndc(p,a_x,a_y);
  }

node_desc_fields()

virtual const desc_fields& tools::sg::tex_quadrilateral::node_desc_fields ( ) const

inlinevirtual

Reimplemented from tools::sg::node.

Definition at line 35 of file tex_quadrilateral.

                                                      {
    TOOLS_FIELD_DESC_NODE_CLASS(tools::sg::tex_quadrilateral)
    static const desc_fields s_v(parent::node_desc_fields(),6, //WARNING : take care of count.
      TOOLS_ARG_FIELD_DESC(img),
      TOOLS_ARG_FIELD_DESC(back_color),
      TOOLS_ARG_FIELD_DESC(expand),
      TOOLS_ARG_FIELD_DESC(limit),
      TOOLS_ARG_FIELD_DESC(show_border),
      TOOLS_ARG_FIELD_DESC(corners)
    );
    return s_v;
  }

operator=()

tex_quadrilateral& tools::sg::tex_quadrilateral::operator= ( const tex_quadrilateral &  a_from )

inline

Definition at line 168 of file tex_quadrilateral.

                                                               {
    parent::operator=(a_from);
    gstos::operator=(a_from);
    base_tex::operator=(a_from);
    if(&a_from==this) return *this;
    show_border = a_from.show_border;
    corners = a_from.corners;
    m_pick_bbox_check_image = a_from.m_pick_bbox_check_image;
    return *this;
  }

pick()

virtual void tools::sg::tex_quadrilateral::pick ( pick_action &  a_action )

inlinevirtual

Reimplemented from tools::sg::node.

Definition at line 112 of file tex_quadrilateral.

                                           {
    if(touched()) {
      update_sg(a_action.out());
      reset_touched();
    }
    if(m_pick_bbox_check_image) {if(m_img.is_empty()) return;}
    if(corners.size()!=4) return;
    f12 xyzs,nms;
    _front(xyzs,nms);
    a_action.add__primitive(*this,gl::triangle_fan(),12,xyzs,true);
  }

point_2_img_ndc()

bool tools::sg::tex_quadrilateral::point_2_img_ndc ( const vec3f &  a_point, float &  a_x, float &  a_y  ) const

inlineprotected

Definition at line 210 of file tex_quadrilateral.

                                                                         {
    // a_point is assumed to be in the corners[0,1,3] plane.
 
    if(corners.size()!=4) {a_x = 0;a_y = 0;return false;}
    // In fact, in the below corners[2] is not used.
 
    // we assume that :
    //  corners[0] is the bottom-left of image
    //  corners[1] is the bottom-right of image
    //  corners[2] is the top-right of image
    //  corners[3] is the top-left of image
    vec3f x_axis = corners[1]-corners[0];
    float l_01 = x_axis.normalize();
    if(l_01==0.0f) {a_x = 0;a_y = 0;return false;}
    vec3f y_axis = corners[3]-corners[0];
    float l_03 = y_axis.normalize();
    if(l_03==0.0f) {a_x = 0;a_y = 0;return false;}
 
    float alpha = x_axis.dot(y_axis);
    float alpha_sq = alpha*alpha;
    if(alpha_sq==1.0f) {a_x = 0;a_y = 0;return false;}
 
    vec3f Op = a_point-corners[0];
 
    float px = Op.dot(x_axis);
    float py = Op.dot(y_axis);
 
    float lambda = (px-alpha*py)/(1.0f-alpha_sq);
    float mu = (py-alpha*px)/(1-alpha_sq);
 
    // We must have : Op = lambda*x_axis+mu*y_axis;
 
    a_x = lambda/l_01;
    a_y = mu/l_03;
 
    return true;
  }

render()

virtual void tools::sg::tex_quadrilateral::render ( render_action &  a_action )

inlinevirtual

Reimplemented from tools::sg::node.

Definition at line 57 of file tex_quadrilateral.

                                               {
    //a_action.out() << "tools::tex_quadrilateral::render : " << std::endl;
 
    //NOTE : we draw border (show_border is true) and background even if
    //       gen_texture() failed.
 
    if(touched()) {
      update_sg(a_action.out());
      reset_touched();
    }
    if(m_img.is_empty()) return;
    if(corners.size()!=4) return;
 
    unsigned int _id = get_tex_id(a_action.out(),a_action.render_manager(),m_img,nearest.value());
 
    const state& state = a_action.state();
 
    //image must be 2^n,2^m in size !
    // exa : 128x64
 
    f12 xyzs,nms;
 
    if(show_border.value()) {
      _front(xyzs,nms/*,0.01f*/); //have to revisit a_epsil.
 
      a_action.color4f(1,0,0,1);
    //a_action.line_width(4);
      a_action.line_width(1);
 
      a_action.draw_vertex_array(gl::line_loop(),12,xyzs);
 
      //pushes back the filled polygons to avoid z-fighting with lines
      a_action.set_polygon_offset(true);
 
      a_action.color4f(state.m_color);
      a_action.line_width(state.m_line_width);
    }
 
    //draw a back face pointing toward negative z :
   {a_action.color4f(back_color.value());
    f18 tris,_nms;
    _tris(tris,_nms);
    a_action.draw_vertex_normal_array(gl::triangles(),18,tris,_nms);
    a_action.color4f(state.m_color);}
 
    if(_id) {
      //a_action.color4f(back_color.value()); //do we want that ?
      _front(xyzs,nms);
      float tcs[8];
      set_tcs(tcs);
      a_action.draw_vertex_normal_array_texture(gl::triangle_fan(),12,xyzs,nms,_id,tcs);
      //a_action.color4f(state.m_color);
    }
    a_action.set_polygon_offset(state.m_GL_POLYGON_OFFSET_FILL);
  }

update_sg()

void tools::sg::tex_quadrilateral::update_sg ( std::ostream &  a_out )

inlineprotected

Definition at line 183 of file tex_quadrilateral.

                                    {
    plane<vec3f> plane(corners[0],corners[1],corners[3]);
    m_normal = plane.normal();
    clean_gstos(); //must reset for all render_manager.
    base_tex::_update_sg_(a_out);
  }

Member Data Documentation

corners

mf_vec<vec3f,float> tools::sg::tex_quadrilateral::corners

Definition at line 33 of file tex_quadrilateral.

m_normal

vec3f tools::sg::tex_quadrilateral::m_normal

protected

Definition at line 441 of file tex_quadrilateral.

m_pick_bbox_check_image

bool tools::sg::tex_quadrilateral::m_pick_bbox_check_image

protected

Definition at line 442 of file tex_quadrilateral.

show_border

sf<bool> tools::sg::tex_quadrilateral::show_border

Definition at line 32 of file tex_quadrilateral.

---

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

• /Users/barrand/private/dev/softinex/g4tools/g4tools/tools/sg/tex_quadrilateral