kc3-lang/ftgl/src/FTGL/FTBBox.h

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  Date : 2009-07-19T13:05:50
  

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• src/FTGL/FTBBox.h

• /*
   * FTGL - OpenGL font library
   *
   * Copyright (c) 2001-2004 Henry Maddocks <ftgl@opengl.geek.nz>
   * Copyright (c) 2008 Sam Hocevar <sam@hocevar.net>
   * Copyright (c) 2008 Sean Morrison <learner@brlcad.org>
   *
   * Permission is hereby granted, free of charge, to any person obtaining
   * a copy of this software and associated documentation files (the
   * "Software"), to deal in the Software without restriction, including
   * without limitation the rights to use, copy, modify, merge, publish,
   * distribute, sublicense, and/or sell copies of the Software, and to
   * permit persons to whom the Software is furnished to do so, subject to
   * the following conditions:
   *
   * The above copyright notice and this permission notice shall be
   * included in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
   * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
   * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
   * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
   * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  
  #ifndef __ftgl__
  #   warning This header is deprecated. Please use <FTGL/ftgl.h> from now.
  #   include <FTGL/ftgl.h>
  #endif
  
  #ifndef __FTBBox__
  #define __FTBBox__
  
  #ifdef __cplusplus
  
  
  /**
   * FTBBox is a convenience class for handling bounding boxes.
   */
  class FTGL_EXPORT FTBBox
  {
      public:
          /**
           * Default constructor. Bounding box is set to zero.
           */
          FTBBox()
          :   lower(0.0f, 0.0f, 0.0f),
              upper(0.0f, 0.0f, 0.0f)
          {}
  
          /**
           * Constructor.
           */
          FTBBox(float lx, float ly, float lz, float ux, float uy, float uz)
          :   lower(lx, ly, lz),
              upper(ux, uy, uz)
          {}
  
          /**
           * Constructor.
           */
          FTBBox(FTPoint l, FTPoint u)
          :   lower(l),
              upper(u)
          {}
  
          /**
           * Constructor. Extracts a bounding box from a freetype glyph. Uses
           * the control box for the glyph. <code>FT_Glyph_Get_CBox()</code>
           *
           * @param glyph A freetype glyph
           */
          FTBBox(FT_GlyphSlot glyph)
          :   lower(0.0f, 0.0f, 0.0f),
              upper(0.0f, 0.0f, 0.0f)
          {
              FT_BBox bbox;
              FT_Outline_Get_CBox(&(glyph->outline), &bbox);
  
              lower.X(static_cast<float>(bbox.xMin) / 64.0f);
              lower.Y(static_cast<float>(bbox.yMin) / 64.0f);
              lower.Z(0.0f);
              upper.X(static_cast<float>(bbox.xMax) / 64.0f);
              upper.Y(static_cast<float>(bbox.yMax) / 64.0f);
              upper.Z(0.0f);
          }
  
          /**
           * Destructor
           */
          ~FTBBox()
          {}
  
          /**
           * Mark the bounds invalid by setting all lower dimensions greater
           * than the upper dimensions.
           */
          void Invalidate()
          {
              lower = FTPoint(1.0f, 1.0f, 1.0f);
              upper = FTPoint(-1.0f, -1.0f, -1.0f);
          }
  
          /**
           * Determines if this bounding box is valid.
           *
           * @return True if all lower values are <= the corresponding
           *         upper values.
           */
          bool IsValid()
          {
              return lower.X() <= upper.X()
                  && lower.Y() <= upper.Y()
                  && lower.Z() <= upper.Z();
          }
  
          /**
           * Move the Bounding Box by a vector.
           *
           * @param vector  The vector to move the bbox in 3D space.
           */
          FTBBox& operator += (const FTPoint vector)
          {
              lower += vector;
              upper += vector;
  
              return *this;
          }
  
          /**
           * Combine two bounding boxes. The result is the smallest bounding
           * box containing the two original boxes.
           *
           * @param bbox  The bounding box to merge with the second one.
           */
          FTBBox& operator |= (const FTBBox& bbox)
          {
              if(bbox.lower.X() < lower.X()) lower.X(bbox.lower.X());
              if(bbox.lower.Y() < lower.Y()) lower.Y(bbox.lower.Y());
              if(bbox.lower.Z() < lower.Z()) lower.Z(bbox.lower.Z());
              if(bbox.upper.X() > upper.X()) upper.X(bbox.upper.X());
              if(bbox.upper.Y() > upper.Y()) upper.Y(bbox.upper.Y());
              if(bbox.upper.Z() > upper.Z()) upper.Z(bbox.upper.Z());
  
              return *this;
          }
  
          void SetDepth(float depth)
          {
              if(depth > 0)
                  upper.Z(lower.Z() + depth);
              else
                  lower.Z(upper.Z() + depth);
          }
  
  
          inline FTPoint const Upper() const
          {
              return upper;
          }
  
  
          inline FTPoint const Lower() const
          {
              return lower;
          }
  
      private:
          /**
           * The bounds of the box
           */
          FTPoint lower, upper;
  };
  
  #endif //__cplusplus
  
  #endif  //  __FTBBox__
  
  

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