kc3-lang/ftgl/include/FTBBox.h

Branch : - branch - master - tag -

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  Commit

• Author : patrick
  Date : 2003-04-06 18:56:01
  Hash : 48995ae5
  Message : Added the FTBBox::Invalidate and FTBBox::IsValid methods.

• include/FTBBox.h

• #ifndef     __FTBBox__
  #define     __FTBBox__
  
  #include <ft2build.h>
  #include FT_FREETYPE_H
  #include FT_GLYPH_H
  
  #include "FTGL.h"
  #include "FTPoint.h"
  
  
  /**
   * FTBBox is a convenience class for handling bounding boxes.
   */
  class FTGL_EXPORT FTBBox
  {
      public:
          /**
           * Default constructor. Bounding box is set to zero.
           */
          FTBBox()
          :   lowerX(0.0f),
              lowerY(0.0f),
              lowerZ(0.0f),
              upperX(0.0f),
              upperY(0.0f),
              upperZ(0.0f)
          {}
          
          /**
           * Constructor.
           */
          FTBBox( float lx, float ly, float lz, float ux, float uy, float uz)
          :   lowerX(lx),
              lowerY(ly),
              lowerZ(lz),
              upperX(ux),
              upperY(uy),
              upperZ(uz)
          {}
          
          /**
           * 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_Glyph glyph)
          {
              FT_BBox bbox;
              FT_Glyph_Get_CBox( glyph, ft_glyph_bbox_subpixels, &bbox );
              
              lowerX = static_cast<float>( bbox.xMin) / 64.0f;
              lowerY = static_cast<float>( bbox.yMin) / 64.0f;
              lowerZ = 0.0f;
              upperX = static_cast<float>( bbox.xMax) / 64.0f;
              upperY = static_cast<float>( bbox.yMax) / 64.0f;
              upperZ = 0.0f; 
          }       
  
          /**
           * Destructor
           */
          ~FTBBox()
          {}
          
          /**
           * Mark the bounds invalid by setting all lower dimensions greater
           * than the upper dimensions.
           */
          void Invalidate() 
          {
              lowerX = lowerY = lowerZ = 1.0f;
              upperX = upperY = upperZ = -1.0f;
          }
          
          /**
           * Determines if this bounding box is valid.
           *
           * @return True if all lower values are <= the corresponding
           *         upper values.
           */
          bool IsValid()
          {
              return((lowerX <= upperX) && (lowerY <= upperY) && (lowerZ <= upperZ));
          }
  
          /**
           * Move the Bounding Box by a vector.
           *
           * @param distance The distance to move the bbox in 3D space.
           */
          FTBBox& Move( FTPoint distance)
          {
              lowerX += distance.x;
              lowerY += distance.y;
              lowerZ += distance.z;
              upperX += distance.x;
              upperY += distance.y;
              upperZ += distance.z;
              return *this;
          }
  
          FTBBox& operator += ( const FTBBox& bbox) 
          {
              lowerX = bbox.lowerX < lowerX? bbox.lowerX: lowerX; 
              lowerY = bbox.lowerY < lowerY? bbox.lowerY: lowerY;
              lowerZ = bbox.lowerZ < lowerZ? bbox.lowerZ: lowerZ; 
              upperX = bbox.upperX > upperX? bbox.upperX: upperX; 
              upperY = bbox.upperY > upperY? bbox.upperY: upperY; 
              upperZ = bbox.upperZ > upperZ? bbox.upperZ: upperZ; 
              
              return *this;
          }
          
          /**
           * The bounds of the box
           */
          // Make these ftPoints & private
          float lowerX, lowerY, lowerZ, upperX, upperY, upperZ;
      protected:
      
      
      private:
  
  };
  
  
  #endif  //  __FTBBox__