epic/OpenRA
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Fix Viewport.VisibleCells.

Browse Source 
Reworked the visible cells calculation to ensure the visible region is actually minimal, which should reduce the amount of rendering to be done by a small amount. Previously, the region would tend to overdraw by 2-3 cells in either direction. For isometric maps, there was also a bug where it would draw far too much vertically above the top of the map.
This commit is contained in:
RoosterDragon
2015-02-26 21:27:48 +00:00
parent 803390c68e
commit d3b93345b4
2 changed files with 17 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
OpenRA.Game/Graphics/Viewport.cs
View File

@@ -163,16 +163,20 @@ namespace OpenRA.Graphics
var wtl = worldRenderer.Position(TopLeft);
var wbr = worldRenderer.Position(BottomRight);
// Visible rectangle in map coordinates
var ctl = new MPos(wtl.X / 1024, wtl.Y / 1024);
// Due to diamond tile staggering, we need to adjust the top-left bounds outwards by half a cell.
if (map.TileShape == TileShape.Diamond)
wtl -= new WVec(512, 512, 0);
// Visible rectangle in map coordinates.
var dy = map.TileShape == TileShape.Diamond ? 512 : 1024;
var cbr = new MPos((wbr.X + 1023) / 1024, (wbr.Y + dy - 1) / dy);
var ctl = new MPos(wtl.X / 1024, wtl.Y / dy);
var cbr = new MPos(wbr.X / 1024, wbr.Y / dy);
// Add a 1 cell cordon to prevent holes, then convert back to cell coordinates
var tl = map.Clamp(new MPos(ctl.U - 1, ctl.V - 1).ToCPos(map));
var tl = map.Clamp(ctl.ToCPos(map));
// Also need to account for height of cells in rows below the bottom
var br = map.Clamp(new MPos(cbr.U + 1, cbr.V + 2 + maxGroundHeight / 2).ToCPos(map));
// Also need to account for height of cells in rows below the bottom.
var heightPadding = map.TileShape == TileShape.Diamond ? 2 : 0;
var br = map.Clamp(new MPos(cbr.U, cbr.V + heightPadding + maxGroundHeight / 2).ToCPos(map));
cells = new CellRegion(map.TileShape, tl, br);
cellsDirty = false;