Changed render entrypoint of RenderableLayer do doRender.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@1192 1c351a6f-456c-4935-88af-207f26c224cf
Added extrusion to WWPath.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@1193 1c351a6f-456c-4935-88af-207f26c224cf
Added the following methods to WWSector: intersection, isEmpty. Modified WWSector to reference another sector object's properties directly, rather than calling the property accessor method.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@1194 1c351a6f-456c-4935-88af-207f26c224cf
Added methods to WWLevel and WWTile to support WWBasicElevationModel.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@1195 1c351a6f-456c-4935-88af-207f26c224cf
Added WWBasicElevationModel and its supporting classes WWElevationTile and WWElevationImage. Added WWEarthElevationModel, an elevation model that requests elevation tiles from the NASA WMS server at http://data.worldwind.arc.nasa.gov/elev.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@1196 1c351a6f-456c-4935-88af-207f26c224cf
Reorganized the WWTessellator's header file to match the organization of its implementation file. Modified WWTessellator to initialize its elevations array with 0 before requesting data from the elevation model.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@1197 1c351a6f-456c-4935-88af-207f26c224cf
Integrated WWEarthElevationModel into WWGlobe. Documented the cache sizes for WWBasicElevationModel.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@1198 1c351a6f-456c-4935-88af-207f26c224cf
Documented WWAbstractShape and fixed documentation for WWRenderableLayer.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@1199 1c351a6f-456c-4935-88af-207f26c224cf
Implemented modal track icon images.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@1200 1c351a6f-456c-4935-88af-207f26c224cf
Modified the tessellator to re-create terrain tile geometry when the elevation model changes. Configured the tessellator's tile size and detail hint to balance performance and terrain tile count.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@1201 1c351a6f-456c-4935-88af-207f26c224cf
Updated the modal track icon state when tracking is implicitly disabled by a navigation gesture or a search go-to animation.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@1202 1c351a6f-456c-4935-88af-207f26c224cf
Removed the unnecessary elevationTimestamp property from WWDrawContext and its assignment in WWSceneController's resetDrawContext method.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@1203 1c351a6f-456c-4935-88af-207f26c224cf
Added Alaska flight paths.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@1204 1c351a6f-456c-4935-88af-207f26c224cf
Completed the implmenetation of WWBasicNavigatorState's pixelSizeAtDistance method. Added methods to WWMatrix to compute invert a general matrix, and to compute an orthographic projection matrix. Moved the matrix-vector multiplication method from WWMatrix to WWVec4 in order to reduce method call overhead.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@1205 1c351a6f-456c-4935-88af-207f26c224cf
Added Open Street Map layer.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@1206 1c351a6f-456c-4935-88af-207f26c224cf