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Mesh generation for QColorMap (3)...
Alexandre Leroux -
r1036:1cd09c4a6181
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@@ -158,4 +158,39 DataSeriesUtils::Mesh DataSeriesUtils::regularMesh(DataSeriesIterator begin, Dat
158 std::tie(nbY, yMin, yStep) = meshProperties(
158 std::tie(nbY, yMin, yStep) = meshProperties(
159 yData.begin(), yData.end(), [](const auto &it) { return *it; }, yResolution.m_Val);
159 yData.begin(), yData.end(), [](const auto &it) { return *it; }, yResolution.m_Val);
160
160
161 // Generates mesh according to the x-axis and y-axis steps
162 Mesh result{nbX, xMin, xStep, nbY, yMin, yStep};
163
164 for (auto meshXIndex = 0; meshXIndex < nbX; ++meshXIndex) {
165 auto meshX = xMin + meshXIndex * xStep;
166 // According to current x-axis of the mesh, finds in the data series the interval in which
167 // the data is or gets closer (without exceeding it).
168 // An interval is defined by a value and extends to +/- 50% of the resolution. For example,
169 // for a value of 3 and a resolution of 1, the associated interval is [2.5, 3.5].
170 auto xIt = std::lower_bound(begin, end, meshX,
171 [xResolution](const auto &it, const auto &val) {
172 return it.x() - xResolution.m_Val / 2. < val;
173 })
174 - 1;
175
176 // When the corresponding entry of the data series is found, generates the values of the
177 // mesh by retrieving the values of the entry, for each y-axis value of the mesh
178 auto values = xIt->values();
179
180 for (auto meshYIndex = 0; meshYIndex < nbY; ++meshYIndex) {
181 auto meshY = yMin + meshYIndex * yStep;
182
183 auto yBegin = yData.begin();
184 auto yIt = std::lower_bound(yBegin, yData.end(), meshY,
185 [yResolution](const auto &it, const auto &val) {
186 return it - yResolution.m_Val / 2. < val;
187 })
188 - 1;
189
190 auto valueIndex = std::distance(yBegin, yIt);
191 result.m_Data[result.m_NbX * meshYIndex + meshXIndex] = values.at(valueIndex);
192 }
193 }
194
195 return result;
161 }
196 }
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