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Plans: Improve performance of viewport plan rendering

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This commit is contained in:
Jonathan G Rennison
2020-09-29 00:05:30 +01:00
parent bf0bdfdd93
commit 3b47b7b091
5 changed files with 85 additions and 19 deletions
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30
src/plans.cpp
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@@ -17,3 +17,33 @@ INSTANTIATE_POOL_METHODS(Plan)
Plan *_current_plan = nullptr;
Plan *_new_plan = nullptr;
void PlanLine::UpdateVisualExtents()
{
if (_network_dedicated) return;
if (this->tiles.size() < 2) {
this->viewport_extents = { INT_MAX, INT_MAX, INT_MAX, INT_MAX };
return;
}
int min_x = INT_MAX;
int max_x = INT_MIN;
int min_y = INT_MAX;
int max_y = INT_MIN;
for (TileIndex t : this->tiles) {
const int tile_x = TileX(t);
const int tile_y = TileY(t);
const int x = tile_y - tile_x;
const int y = tile_y + tile_x;
if (x < min_x) min_x = x;
if (x > max_x) max_x = x;
if (y < min_y) min_y = y;
if (y > max_y) max_y = y;
}
this->viewport_extents = { (int)(min_x * TILE_SIZE * 2 * ZOOM_LVL_BASE), (int)(min_y * TILE_SIZE * ZOOM_LVL_BASE),
(int)((max_x + 1) * TILE_SIZE * 2 * ZOOM_LVL_BASE), (int)((max_y + 1) * TILE_SIZE * ZOOM_LVL_BASE) };
}