pascals_triangle.cpp
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00001 
00009 /*****************************************************************************
00010 ** Includes
00011 *****************************************************************************/
00012 
00013 #include "../../include/ecl/geometry/pascals_triangle.hpp"
00014 
00015 /*****************************************************************************
00016 ** Namespaces
00017 *****************************************************************************/
00018 
00019 namespace ecl {
00020 
00021 /*****************************************************************************
00022 ** Implementation [PascalsTriangle<3>]
00023 *****************************************************************************/
00024 PascalsTriangle<3>::PascalsTriangle() {
00025     coefficients << 1,1,1,1,
00026                    1,2,3,
00027                    1,3,
00028                    1;
00029 }
00030 
00031 PascalsTriangle<3>::const_iterator PascalsTriangle<3>::begin(unsigned int row_index) const {
00032     int coeff_index = 0;
00033     for (unsigned int i = 0; i < row_index; ++i ) {
00034         coeff_index += 3+1-i;
00035     }
00036     return const_iterator( &coefficients[coeff_index] );
00037 }
00038 PascalsTriangle<3>::const_iterator PascalsTriangle<3>::end(unsigned int row_index) const {
00039     int coeff_index = 0;
00040     for (unsigned int i = 0; i <= row_index; ++i ) {
00041         coeff_index += 3+1-i;
00042     }
00043     coeff_index -= 1; // dont want to call beyond the array limit.
00044     return const_iterator( (&coefficients[coeff_index])+1 );
00045 }
00046 
00047 
00048 /*****************************************************************************
00049 ** Implementation [PascalsTriangle<5>]
00050 *****************************************************************************/
00051 PascalsTriangle<5>::PascalsTriangle() {
00052     coefficients << 1,1,1,1,1,1,
00053                     1,2,3,4,5,
00054                     1,3,6,10,
00055                     1,4,10,
00056                     1,5,
00057                     1;
00058 }
00059 
00060 PascalsTriangle<5>::const_iterator PascalsTriangle<5>::begin(unsigned int row_index) const {
00061     int coeff_index = 0;
00062     for (unsigned int i = 0; i < row_index; ++i ) {
00063         coeff_index += 5+1-i;
00064     }
00065     return const_iterator( &coefficients[coeff_index] );
00066 }
00067 PascalsTriangle<5>::const_iterator PascalsTriangle<5>::end(unsigned int row_index) const {
00068     int coeff_index = 0;
00069     for (unsigned int i = 0; i <= row_index; ++i ) {
00070         coeff_index += 5+1-i;
00071     }
00072     coeff_index -= 1; // dont want to call beyond the array limit.
00073     return const_iterator( (&coefficients[coeff_index])+1 );
00074 }
00075 
00076 
00077 } // namespace ecl


ecl_geometry
Author(s): Daniel Stonier
autogenerated on Thu Jun 6 2019 21:17:52