// Copyright (C) 2010, Guy Barrand. All rights reserved.
// See the file tools.license for terms.

#ifndef tools_sg_cube
#define tools_sg_cube

#include "node"
#include "render_gstos"

#include "sf"
#include "pick_action"
#include "bbox_action"

namespace tools {
namespace sg {

class cube : public node, public render_gstos {
  TOOLS_NODE(cube,tools::sg::cube,node)
public:
  sf<float> width;
  sf<float> height;
  sf<float> depth;
public:
  virtual const desc_fields& node_desc_fields() const {
    TOOLS_FIELD_DESC_NODE_CLASS(tools::sg::cube)
    static const desc_fields s_v(parent::node_desc_fields(),3, //WARNING : take care of count.
      TOOLS_ARG_FIELD_DESC(width),
      TOOLS_ARG_FIELD_DESC(height),
      TOOLS_ARG_FIELD_DESC(depth)
    );
    return s_v;
  }
private:
  void add_fields(){
    add_field(&width);
    add_field(&height);
    add_field(&depth);
  }
protected: //render_gstos
  virtual void visit(gstos_add& a_visitor,draw_type a_style) {
    visit<gstos_add>(a_visitor,a_style);
  }
public:
  virtual void render(render_action& a_action) {
    if(gstos_render(a_action)) return;
    // immediate rendering :
    const state& state = a_action.state();
    bool draw_edges = false;
    if(state.m_draw_type==draw_filled) draw_edges = state.m_GL_LIGHTING?false:true;

    if(draw_edges) {
      a_action.color4f(0,0,0,1); //if lighten, then rendered grey.
      a_action.line_width(1);
      visit(a_action,draw_lines);
      a_action.set_polygon_offset(true);
      a_action.color4f(state.m_color);
      a_action.line_width(state.m_line_width);
    }

    visit(a_action,state.m_draw_type);
    if(draw_edges) a_action.set_polygon_offset(state.m_GL_POLYGON_OFFSET_FILL);
  }

  virtual void pick(pick_action& a_action) {
    const state& state = a_action.state();
    if(a_action.stop_at_first()){
      visit(a_action,state.m_draw_type);
      if(a_action.done()) a_action.set_node(this);
    } else {
      a_action.set_done(false);
      a_action.zs().clear();
      a_action.ws().clear();
      visit(a_action,state.m_draw_type);
      if(a_action.done()) {
        a_action.add_pick(*this,a_action.zs(),a_action.ws(),a_action.state());
        a_action.set_done(false);
      }
    }
  }
  virtual void bbox(bbox_action& a_action) {
    const state& state = a_action.state();
    visit(a_action,state.m_draw_type);
  }
public:
  cube()
  :parent()
  ,render_gstos()
  ,width(1.0f)
  ,height(1.0f)
  ,depth(1.0f)
  {
    add_fields();
  }
  virtual ~cube(){}
public:
  cube(const cube& a_from)
  :parent(a_from)
  ,render_gstos(a_from)
  ,width(a_from.width)
  ,height(a_from.height)
  ,depth(a_from.depth)
  {
    add_fields();
  }
  cube& operator=(const cube& a_from){
    parent::operator=(a_from);
    render_gstos::operator=(a_from);

    width = a_from.width;
    height = a_from.height;
    depth = a_from.depth;

    return *this;
  }
protected:
  void _faces(float front[],float back[],   //[12]
              float right[],float left[],
              float   top[],float bottom[]){

    float wh = width.value()*0.5f;
    float hh = height.value()*0.5f;
    float dh = depth.value()*0.5f;

    front[0] =  wh;front[ 1] = -hh;front[ 2] = dh;
    front[3] =  wh;front[ 4] =  hh;front[ 5] = dh;
    front[6] = -wh;front[ 7] =  hh;front[ 8] = dh;
    front[9] = -wh;front[10] = -hh;front[11] = dh;

    back[0] =  wh;back[ 1] = -hh;back[ 2] = -dh;
    back[3] = -wh;back[ 4] = -hh;back[ 5] = -dh;
    back[6] = -wh;back[ 7] =  hh;back[ 8] = -dh;
    back[9] =  wh;back[10] =  hh;back[11] = -dh;

    right[0] = wh;right[ 1] = -hh;right[ 2] =  dh;
    right[3] = wh;right[ 4] = -hh;right[ 5] = -dh;
    right[6] = wh;right[ 7] =  hh;right[ 8] = -dh;
    right[9] = wh;right[10] =  hh;right[11] =  dh;

    left[0] = -wh;left[ 1] = -hh;left[ 2] =  dh;
    left[3] = -wh;left[ 4] =  hh;left[ 5] =  dh;
    left[6] = -wh;left[ 7] =  hh;left[ 8] = -dh;
    left[9] = -wh;left[10] = -hh;left[11] = -dh;

    top[0] =  wh;top[ 1] = hh;top[ 2] =  dh;
    top[3] =  wh;top[ 4] = hh;top[ 5] = -dh;
    top[6] = -wh;top[ 7] = hh;top[ 8] = -dh;
    top[9] = -wh;top[10] = hh;top[11] =  dh;

    bottom[0] =  wh;bottom[ 1] = -hh;bottom[ 2] =  dh;
    bottom[3] = -wh;bottom[ 4] = -hh;bottom[ 5] =  dh;
    bottom[6] = -wh;bottom[ 7] = -hh;bottom[ 8] = -dh;
    bottom[9] =  wh;bottom[10] = -hh;bottom[11] = -dh;
  }

  void _tris(float tris[],float nms[]){ //[108]
    float front[12];
    float back[12];
    float right[12];
    float left[12];
    float top[12];
    float bottom[12];

    _faces(front,back,right,left,top,bottom);

    /////////////////////
    tris[0] = front[0];
    tris[1] = front[1];
    tris[2] = front[2];

    tris[3] = front[3];
    tris[4] = front[4];
    tris[5] = front[5];

    tris[6] = front[6];
    tris[7] = front[7];
    tris[8] = front[8];
    //
    tris[9]  = front[6];
    tris[10] = front[7];
    tris[11] = front[8];

    tris[12] = front[9];
    tris[13] = front[10];
    tris[14] = front[11];

    tris[15] = front[0];
    tris[16] = front[1];
    tris[17] = front[2];

    /////////////////////
    tris[18] = back[0];
    tris[19] = back[1];
    tris[20] = back[2];

    tris[21] = back[3];
    tris[22] = back[4];
    tris[23] = back[5];

    tris[24] = back[6];
    tris[25] = back[7];
    tris[26] = back[8];
    //
    tris[27] = back[6];
    tris[28] = back[7];
    tris[29] = back[8];

    tris[30] = back[9];
    tris[31] = back[10];
    tris[32] = back[11];

    tris[33] = back[0];
    tris[34] = back[1];
    tris[35] = back[2];

    /////////////////////
    tris[36] = right[0];
    tris[37] = right[1];
    tris[38] = right[2];

    tris[39] = right[3];
    tris[40] = right[4];
    tris[41] = right[5];

    tris[42] = right[6];
    tris[43] = right[7];
    tris[44] = right[8];
    //
    tris[45] = right[6];
    tris[46] = right[7];
    tris[47] = right[8];

    tris[48] = right[9];
    tris[49] = right[10];
    tris[50] = right[11];

    tris[51] = right[0];
    tris[52] = right[1];
    tris[53] = right[2];

    /////////////////////
    tris[54] = left[0];
    tris[55] = left[1];
    tris[56] = left[2];

    tris[57] = left[3];
    tris[58] = left[4];
    tris[59] = left[5];

    tris[60] = left[6];
    tris[61] = left[7];
    tris[62] = left[8];
    //
    tris[63] = left[6];
    tris[64] = left[7];
    tris[65] = left[8];

    tris[66] = left[9];
    tris[67] = left[10];
    tris[68] = left[11];

    tris[69] = left[0];
    tris[70] = left[1];
    tris[71] = left[2];

    /////////////////////
    tris[72] = top[0];
    tris[73] = top[1];
    tris[74] = top[2];

    tris[75] = top[3];
    tris[76] = top[4];
    tris[77] = top[5];

    tris[78] = top[6];
    tris[79] = top[7];
    tris[80] = top[8];
    //
    tris[81] = top[6];
    tris[82] = top[7];
    tris[83] = top[8];

    tris[84] = top[9];
    tris[85] = top[10];
    tris[86] = top[11];

    tris[87] = top[0];
    tris[88] = top[1];
    tris[89] = top[2];

    /////////////////////
    tris[90] = bottom[0];
    tris[91] = bottom[1];
    tris[92] = bottom[2];

    tris[93] = bottom[3];
    tris[94] = bottom[4];
    tris[95] = bottom[5];

    tris[96] = bottom[6];
    tris[97] = bottom[7];
    tris[98] = bottom[8];
    //
    tris[99] = bottom[6];
    tris[100] = bottom[7];
    tris[101] = bottom[8];

    tris[102] = bottom[9];
    tris[103] = bottom[10];
    tris[104] = bottom[11];

    tris[105] = bottom[0];
    tris[106] = bottom[1];
    tris[107] = bottom[2];
    /////////////////////

    ///////////////////// front
    nms[0] = 0;
    nms[1] = 0;
    nms[2] = 1;

    nms[3] = 0;
    nms[4] = 0;
    nms[5] = 1;

    nms[6] = 0;
    nms[7] = 0;
    nms[8] = 1;
    //
    nms[9]  = 0;
    nms[10] = 0;
    nms[11] = 1;

    nms[12] = 0;
    nms[13] = 0;
    nms[14] = 1;

    nms[15] = 0;
    nms[16] = 0;
    nms[17] = 1;

    ///////////////////// back
    nms[18] =  0;
    nms[19] =  0;
    nms[20] = -1;

    nms[21] =  0;
    nms[22] =  0;
    nms[23] = -1;

    nms[24] =  0;
    nms[25] =  0;
    nms[26] = -1;
    //
    nms[27] =  0;
    nms[28] =  0;
    nms[29] = -1;

    nms[30] =  0;
    nms[31] =  0;
    nms[32] = -1;

    nms[33] =  0;
    nms[34] =  0;
    nms[35] = -1;

    ///////////////////// right
    nms[36] = 1;
    nms[37] = 0;
    nms[38] = 0;

    nms[39] = 1;
    nms[40] = 0;
    nms[41] = 0;

    nms[42] = 1;
    nms[43] = 0;
    nms[44] = 0;
    //
    nms[45] = 1;
    nms[46] = 0;
    nms[47] = 0;

    nms[48] = 1;
    nms[49] = 0;
    nms[50] = 0;

    nms[51] = 1;
    nms[52] = 0;
    nms[53] = 0;

    ///////////////////// left
    nms[54] = -1;
    nms[55] =  0;
    nms[56] =  0;

    nms[57] = -1;
    nms[58] =  0;
    nms[59] =  0;

    nms[60] = -1;
    nms[61] =  0;
    nms[62] =  0;
    //
    nms[63] = -1;
    nms[64] =  0;
    nms[65] =  0;

    nms[66] = -1;
    nms[67] =  0;
    nms[68] =  0;

    nms[69] = -1;
    nms[70] =  0;
    nms[71] =  0;

    ///////////////////// top
    nms[72] = 0;
    nms[73] = 1;
    nms[74] = 0;

    nms[75] = 0;
    nms[76] = 1;
    nms[77] = 0;

    nms[78] = 0;
    nms[79] = 1;
    nms[80] = 0;
    //
    nms[81] = 0;
    nms[82] = 1;
    nms[83] = 0;

    nms[84] = 0;
    nms[85] = 1;
    nms[86] = 0;

    nms[87] = 0;
    nms[88] = 1;
    nms[89] = 0;

    ///////////////////// bottom
    nms[90] =  0;
    nms[91] = -1;
    nms[92] =  0;

    nms[93] =  0;
    nms[94] = -1;
    nms[95] =  0;

    nms[96] =  0;
    nms[97] = -1;
    nms[98] =  0;
    //
    nms[99]  =  0;
    nms[100] = -1;
    nms[101] =  0;

    nms[102] =  0;
    nms[103] = -1;
    nms[104] =  0;

    nms[105] =  0;
    nms[106] = -1;
    nms[107] =  0;
    /////////////////////
  }

  void _lines(float lines[]) { //[144]
    float front[12];
    float back[12];
    float right[12];
    float left[12];
    float top[12];
    float bottom[12];

    _faces(front,back,right,left,top,bottom);

    //4 segs * 2 points * 3 coords * 6 faces.

    //4*2*3*6 = 24*6 = 144

    lines[0] = front[0];
    lines[1] = front[1];
    lines[2] = front[2];
    lines[3] = front[3];
    lines[4] = front[4];
    lines[5] = front[5];

    lines[6] = front[3];
    lines[7] = front[4];
    lines[8] = front[5];
    lines[9] = front[6];
    lines[10] = front[7];
    lines[11] = front[8];

    lines[12] = front[6];
    lines[13] = front[7];
    lines[14] = front[8];
    lines[15] = front[9];
    lines[16] = front[10];
    lines[17] = front[11];

    lines[18] = front[9];
    lines[19] = front[10];
    lines[20] = front[11];
    lines[21] = front[0];
    lines[22] = front[1];
    lines[23] = front[2];

    lines[24] = back[0];
    lines[25] = back[1];
    lines[26] = back[2];
    lines[27] = back[3];
    lines[28] = back[4];
    lines[29] = back[5];

    lines[30] = back[3];
    lines[31] = back[4];
    lines[32] = back[5];
    lines[33] = back[6];
    lines[34] = back[7];
    lines[35] = back[8];

    lines[36] = back[6];
    lines[37] = back[7];
    lines[38] = back[8];
    lines[39] = back[9];
    lines[40] = back[10];
    lines[41] = back[11];

    lines[42] = back[9];
    lines[43] = back[10];
    lines[44] = back[11];
    lines[45] = back[0];
    lines[46] = back[1];
    lines[47] = back[2];

    lines[48] = left[0];
    lines[49] = left[1];
    lines[50] = left[2];
    lines[51] = left[3];
    lines[52] = left[4];
    lines[53] = left[5];

    lines[54] = left[3];
    lines[55] = left[4];
    lines[56] = left[5];
    lines[57] = left[6];
    lines[58] = left[7];
    lines[59] = left[8];

    lines[60] = left[6];
    lines[61] = left[7];
    lines[62] = left[8];
    lines[63] = left[9];
    lines[64] = left[10];
    lines[65] = left[11];

    lines[66] = left[9];
    lines[67] = left[10];
    lines[68] = left[11];
    lines[69] = left[0];
    lines[70] = left[1];
    lines[71] = left[2];

    lines[72] = right[0];
    lines[73] = right[1];
    lines[74] = right[2];
    lines[75] = right[3];
    lines[76] = right[4];
    lines[77] = right[5];

    lines[78] = right[3];
    lines[79] = right[4];
    lines[80] = right[5];
    lines[81] = right[6];
    lines[82] = right[7];
    lines[83] = right[8];

    lines[84] = right[6];
    lines[85] = right[7];
    lines[86] = right[8];
    lines[87] = right[9];
    lines[88] = right[10];
    lines[89] = right[11];

    lines[90] = right[9];
    lines[91] = right[10];
    lines[92] = right[11];
    lines[93] = right[0];
    lines[94] = right[1];
    lines[95] = right[2];

    lines[96] = top[0];
    lines[97] = top[1];
    lines[98] = top[2];
    lines[99] = top[3];
    lines[100] = top[4];
    lines[101] = top[5];

    lines[102] = top[3];
    lines[103] = top[4];
    lines[104] = top[5];
    lines[105] = top[6];
    lines[106] = top[7];
    lines[107] = top[8];

    lines[108] = top[6];
    lines[109] = top[7];
    lines[110] = top[8];
    lines[111] = top[9];
    lines[112] = top[10];
    lines[113] = top[11];

    lines[114] = top[9];
    lines[115] = top[10];
    lines[116] = top[11];
    lines[117] = top[0];
    lines[118] = top[1];
    lines[119] = top[2];

    lines[120] = bottom[0];
    lines[121] = bottom[1];
    lines[122] = bottom[2];
    lines[123] = bottom[3];
    lines[124] = bottom[4];
    lines[125] = bottom[5];

    lines[126] = bottom[3];
    lines[127] = bottom[4];
    lines[128] = bottom[5];
    lines[129] = bottom[6];
    lines[130] = bottom[7];
    lines[131] = bottom[8];

    lines[132] = bottom[6];
    lines[133] = bottom[7];
    lines[134] = bottom[8];
    lines[135] = bottom[9];
    lines[136] = bottom[10];
    lines[137] = bottom[11];

    lines[138] = bottom[9];
    lines[139] = bottom[10];
    lines[140] = bottom[11];
    lines[141] = bottom[0];
    lines[142] = bottom[1];
    lines[143] = bottom[2];
  }

  void _points(float points[]) { //[24]
    float wh = width.value()*0.5f;
    float hh = height.value()*0.5f;
    float dh = depth.value()*0.5f;

    points[0] =  wh;points[ 1] = -hh;points[ 2] = dh;
    points[3] =  wh;points[ 4] =  hh;points[ 5] = dh;
    points[6] = -wh;points[ 7] =  hh;points[ 8] = dh;
    points[9] = -wh;points[10] = -hh;points[11] = dh;

    points[12+0] =  wh;points[12+ 1] = -hh;points[12+ 2] = -dh;
    points[12+3] = -wh;points[12+ 4] = -hh;points[12+ 5] = -dh;
    points[12+6] = -wh;points[12+ 7] =  hh;points[12+ 8] = -dh;
    points[12+9] =  wh;points[12+10] =  hh;points[12+11] = -dh;
  }

  template <class T>
  void visit(T& a_visitor,draw_type a_style){
    if(a_style==draw_points) {
      float points[24];
      _points(points);
      a_visitor.add_points(24,points);

    } else if(a_style==draw_lines) {
      float lines[144]; //segments
      _lines(lines);
      a_visitor.add_lines(144,lines);

    } else if(a_style==draw_filled) {
      float tris[108];float nms[108];
      _tris(tris,nms);
      a_visitor.add_triangles_normal(108,tris,nms);
    }
  }
};

}}

#endif