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catmull-rom: ensure that the curve evaluation is exact at the control points

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This commit is contained in:
Alberto Griggio 2018-08-17 15:30:36 +02:00
parent 97e73457ee
commit d6ca3d65aa
1 changed files with 7 additions and 1 deletions
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8
rtengine/diagonalcurves.cc
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@ -317,7 +317,10 @@ inline void catmull_rom_spline(int n_points,
double c, d, A1_x, A1_y, A2_x, A2_y, A3_x, A3_y; double c, d, A1_x, A1_y, A2_x, A2_y, A3_x, A3_y;
double B1_x, B1_y, B2_x, B2_y, C_x, C_y; double B1_x, B1_y, B2_x, B2_y, C_x, C_y;
for (i = 0; i < n_points; ++i) { res_x.push_back(p1_x);
res_y.push_back(p1_y);
for (i = 1; i < n_points-1; ++i) {
t = t1 + space * i; t = t1 + space * i;
c = (t1 - t)/(t1 - t0); c = (t1 - t)/(t1 - t0);
@ -353,6 +356,9 @@ inline void catmull_rom_spline(int n_points,
res_x.push_back(C_x); res_x.push_back(C_x);
res_y.push_back(C_y); res_y.push_back(C_y);
} }
res_x.push_back(p2_x);
res_y.push_back(p2_y);
} }