comparison: src/grid.cpp
src/grid.cpp
- changeset 1184
- 393babf1319d
- parent 1182
- 813d020f92d4
- child 1192
- 317f4ce38f3f
- child 1323
- 05b3e173c900
equal
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replaced
| 1183:caa20ed02728 | 1184:393babf1319d |
|---|---|
| 65 } | 65 } |
| 66 | 66 |
| 67 | 67 |
| 68 QPointF Grid::snap(QPointF point) const | 68 QPointF Grid::snap(QPointF point) const |
| 69 { | 69 { |
| 70 if (false) | 70 switch (type()) |
| 71 { | 71 { |
| 72 // For each co-ordinate, extract the amount of grid steps the value is away from zero, round that to remove the remainder, | 72 default: |
| 73 // and multiply back by the the grid size. | 73 case Cartesian: |
| 74 double size = coordinateSnap(); | 74 { |
| 75 return {round(point.x() / size) * size, round(point.y() / size) * size}; | 75 // For each co-ordinate, extract the amount of grid steps the value is away from zero, round that to remove the remainder, |
| 76 } | 76 // and multiply back by the the grid size. |
| 77 else | 77 double size = coordinateSnap(); |
| 78 { | 78 return {round(point.x() / size) * size, round(point.y() / size) * size}; |
| 79 qreal radius = hypot(point.x() - pole().x(), point.y() - -pole().y()); | 79 } |
| 80 qreal azimuth = atan2(point.y() - -pole().y(), point.x() - pole().x()); | 80 |
| 81 double size = coordinateSnap(); | 81 case Polar: |
| 82 double angleStep = 2 * pi / polarDivisions(); | 82 { |
| 83 radius = round(radius / size) * size; | 83 qreal radius = hypot(point.x() - pole().x(), point.y() - -pole().y()); |
| 84 azimuth = round(azimuth / angleStep) * angleStep; | 84 qreal azimuth = atan2(point.y() - -pole().y(), point.x() - pole().x()); |
| 85 return {pole().x() + cos(azimuth) * radius, -pole().y() + sin(azimuth) * radius}; | 85 double size = coordinateSnap(); |
| 86 double angleStep = 2 * pi / polarDivisions(); | |
| 87 radius = round(radius / size) * size; | |
| 88 azimuth = round(azimuth / angleStep) * angleStep; | |
| 89 return {pole().x() + cos(azimuth) * radius, -pole().y() + sin(azimuth) * radius}; | |
| 90 } | |
| 86 } | 91 } |
| 87 } | 92 } |
| 88 | 93 |
| 89 /* | 94 /* |
| 90 * Returns the pole of the grid, in ideal X/Y co-ordinates. Z is left up for the caller to decide. | 95 * Returns the pole of the grid, in ideal X/Y co-ordinates. Z is left up for the caller to decide. |
| 91 */ | 96 */ |
| 92 QPointF Grid::pole() const | 97 QPointF Grid::pole() const |
| 93 { | 98 { |
| 94 return {12, -17}; | 99 return {0, 0}; |
| 95 } | 100 } |
| 96 | 101 |
| 97 /* | 102 /* |
| 98 * Returns the amount of divisions (slices) to be used in the polar grid. | 103 * Returns the amount of divisions (slices) to be used in the polar grid. |
| 99 */ | 104 */ |
| 108 | 113 |
| 109 case Fine: | 114 case Fine: |
| 110 return HighResolution; | 115 return HighResolution; |
| 111 } | 116 } |
| 112 } | 117 } |
| 118 | |
| 119 /* | |
| 120 * Returns whether to use a cartesian or polar grid. | |
| 121 */ | |
| 122 Grid::Type Grid::type() const | |
| 123 { | |
| 124 return m_config->polarGrid() ? Polar : Cartesian; | |
| 125 } |
