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mtlib.h

/*    mtlib.h
      Copyright (C) 2005-2006 Mark Tyler

      This file is part of mtPaint.

      mtPaint is free software; you can redistribute it and/or modify
      it under the terms of the GNU General Public License as published by
      the Free Software Foundation; either version 2 of the License, or
      (at your option) any later version.

      mtPaint is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      GNU General Public License for more details.

      You should have received a copy of the GNU General Public License
      along with mtPaint in the file COPYING.
*/


typedef struct
{     double x,y,z;     }     MT_Coor;


MT_Coor MT_coze();                        // Return zero coordinates
MT_Coor MT_co_div_k(MT_Coor AA, double BB);     // Divide coords/vector by constant
MT_Coor MT_co_mul_k(MT_Coor AA, double BB);     // Multiply coords/vector by constant
MT_Coor MT_addco(MT_Coor AA, MT_Coor BB); // Add two coords together (AA+BB)
MT_Coor MT_subco(MT_Coor AA, MT_Coor BB); // Add two coords together (AA-BB)
double MT_lin_len(MT_Coor AA, MT_Coor BB);      // Return length of line between two coordinates
double MT_lin_len2(MT_Coor AA);                 // Return length of vector
MT_Coor MT_uni_vec(MT_Coor AA, MT_Coor BB);     // Return unit vector between two coords (A to B)
MT_Coor MT_uni_vec2(MT_Coor AA);          // Return unit vector
MT_Coor MT_palin(double position, double ratio, MT_Coor p1, MT_Coor p2, MT_Coor p3, MT_Coor p4, MT_Coor lenz);
                                    // Parabolic Linear Interpolation from point 2 to point 3 at position (0-1) and ratio (0=flat, 0.25=curvy, 1=very bendy)

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