Canvas snippets: Difference between revisions

Whenever a symbol may need to be instanced multiple times, it makes sense to use caching - otherwise, identical symbols would be treated as separate OpenVG groups, all of which would need to be rasterized/rendedered separately. Typically, a map may display multiple instances of an otherwise identical symbol (think VOR, NDB, DME etc) - equally, a multiplayer map may showing multiple aircraft symbols at the same time. In these cases, it makes sense to use the SymbolCache framework, which will render symbols into a separate Canvas texture and provide a texture map that can be treated as a lookup map, which even supports styling for otherwise identical symbols. To learn more, please refer to [[Canvas MapStructure#The_SymbolCache|SymbolCache]]