The MapChartCell class represents an area within a 2D map.
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#include <gls_map_chart_data_source.h>
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| virtual | ~MapChartCell () |
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virtual void | Write (std::ostream &os) const |
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The MapChartCell class represents an area within a 2D map.
MapChartCells are obtained from a GlsMapChartDataSource by calling the GlsMapChartDataSource::GetCellList() method. Each MapChartCell may provide a texture for rendering or it may use it's own custom rendering method to draw its data. The data needed to render the cell may not have been loaded yet, the caller can set the priority of various cells to control the order in which they are loaded.
Constructor
- Parameters
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| logicalHeight | The viewing height in logical space. |
Destructor for abstract base class
- Note
- Protected for proper reference counting – call Release() instead of destroying directly.
| virtual bool AllowOutlines |
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const |
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inlinevirtual |
Instructs the MapChart Cell Manager whether to calculate and display cell outlines.
- Returns
- True if the outlines should be drawn.
| virtual void BindTexture |
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pure virtual |
If TextureIsReady() is true, this method will bind the texture for the cell. You must call UnbindTexture() to unbind the texture If TextureIsReady() is false, this method does nothing.
| const GeoRect& GetGeoRect |
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const |
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inline |
- Returns
- The GeoRect that describes the coverage area for the cell.
| virtual unsigned long GetLayerID |
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const |
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inlinevirtual |
Integer representing the layer of this image. Images from the same MapDataSource with the same Layer number all contain data at the same resolution (i.e. 'zoom level') and can be drawn together.
| virtual bool HasTexture |
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const |
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pure virtual |
Determine if this cell displays a texture. If this returns true, you should call TextureIsReady() to determine if the texture data has loaded and BindTexture() to bind the texture to the current OpenGL context.
- Returns
- true if this cell is capable of loading a texture
| virtual bool IsCellValid |
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const |
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inlinevirtual |
Determine if this cell is still valid. Invalid cells are cells that are no longer relevant for a given data source (e.g. backing data for cell is unloaded).
- Returns
- true if the cell is valid, false if the cell is not valid
Determine if two MapCells are equivalent
- Parameters
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- Returns
- true if the cells are equivalent, false otherwise
The post draw callback for each cell should be called after all of the MapCell textures have been drawn to allow the MapCells to render any overlay geometry
- Parameters
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MapCells cannot be deleted directly Use this method to decrement the reference count of the MapDataSource.
| virtual void SetLoadPriority |
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unsigned int |
val | ) |
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inlinevirtual |
The priority of this cell in the loading order. 0 is the highest priority. This is typically set by the CellMgr.
| virtual bool TextureIsReady |
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const |
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pure virtual |
- Returns
- true if BindTexture will apply a texture when called.
| std::ostream& operator<< |
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std::ostream & |
os, |
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const MapChartCell & |
cell |
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friend |
The documentation for this class was generated from the following file:
1.8.10 
