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fix potential endless loop when evaluating the spline

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This commit is contained in:
Florens Wasserfall 2017-04-04 16:25:00 +02:00
parent 8ec0275967
commit f24ca220d5
1 changed files with 4 additions and 1 deletions
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5
xs/src/libslic3r/LayerHeightSpline.cpp
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@ -158,15 +158,18 @@ std::vector<coordf_t> LayerHeightSpline::getInterpolatedLayers() const
coordf_t z = this->_original_layers[0];
coordf_t h;
coordf_t h_diff = 0;
coordf_t last_h_diff = 0;
coordf_t eps = 0.0001;
while(z <= this->_object_height) {
h = 0;
h_diff = 0;
// find intersection between layer height and spline
do {
last_h_diff = h_diff;
h += h_diff/2;
h = this->_layer_height_spline->evaluate(z+h);
h_diff = this->_layer_height_spline->evaluate(z+h) - h;
} while(std::abs(h_diff) > eps);
} while(std::abs(h_diff) > eps && std::abs(h_diff - last_h_diff) > eps);
z += h;
layers.push_back(z);
}