source/zbufinternals.h

   1 /* This file is part of Shapes.
   2  *
   3  * Shapes is free software: you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation, either version 3 of the License, or
   6  * any later version.
   7  *
   8  * Shapes is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with Shapes.  If not, see <http://www.gnu.org/licenses/>.
  15  *
  16  * Copyright 2008 Henrik Tidefelt
  17  */
  18
  19 #pragma once
  20
  21 #include "elementarycoords.h"
  22
  23 #include <vector>
  24
  25 namespace Shapes
  26 {
  27         namespace Computation
  28         {
  29
  30                 class SplicingLine
  31                 {
  32                 public:
  33                         bool isTriangleSide_;
  34                         // The line is defined in several ways. First, by p0_ -- (p0_+lengt_*d_), where d_ is unit:
  35                         Concrete::Coords2D p0_;
  36                         Concrete::UnitFloatPair d_;
  37                         Concrete::Length length_;
  38
  39                         // The line through p0 -- p1 is given by x: <x,n_> == r_, where n_ is unit.
  40                         Concrete::UnitFloatPair n_;
  41                         Concrete::Length r_;
  42
  43                         std::vector< const Concrete::Coords2D * > intersections_;
  44
  45                         SplicingLine( const Concrete::Coords2D & p0, const Concrete::Coords2D & p1_sub_p0, bool isTriangleSide );
  46                         SplicingLine( const SplicingLine & orig );
  47                         explicit SplicingLine( ); // Only to be used to create a destination object.
  48
  49                         Concrete::Coords2D intersection( const Computation::SplicingLine & other ) const;
  50                         size_t nextLine( const Concrete::Coords2D * p, const Concrete::UnitFloatPair & n, const std::vector< Computation::SplicingLine > & lines ) const;
  51                         Concrete::Length distanceTo( const Concrete::Coords2D p ) const;
  52                 };
  53
  54         }
  55 }