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Code Issues Releases Wiki Activity

Calculate zoom to cursor based on mouse coordinates

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mix
2025-08-27 08:57:39 +01:00
parent d18645354a
commit 06579b45d2
2 changed files with 15 additions and 11 deletions
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25
src/openrct2/interface/Window.cpp
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@@ -490,15 +490,7 @@ static constexpr float kWindowScrollLocations[][2] = {
if (v->zoom == zoomLevel)
return;
// Zooming to cursor? Remember where we're pointing at the moment.
int32_t saved_map_x = 0;
int32_t saved_map_y = 0;
int32_t offset_x = 0;
int32_t offset_y = 0;
if (Config::Get().general.ZoomToCursor && atCursor)
{
WindowViewportGetMapCoordsByCursor(w, &saved_map_x, &saved_map_y, &offset_x, &offset_y);
}
const ZoomLevel previousZoomLevel = v->zoom;
// Zoom in
while (v->zoom > zoomLevel)
@@ -516,10 +508,21 @@ static constexpr float kWindowScrollLocations[][2] = {
w.savedViewPos.y -= v->ViewHeight() / 4;
}
// Zooming to cursor? Centre around the tile we were hovering over just now.
if (Config::Get().general.ZoomToCursor && atCursor)
{
WindowViewportCentreTileAroundCursor(w, saved_map_x, saved_map_y, offset_x, offset_y);
const auto mouseCoords = ContextGetCursorPositionScaled() - v->pos;
const int32_t diffX = (mouseCoords.x - (zoomLevel.ApplyInversedTo(v->ViewWidth()) / 2));
const int32_t diffY = (mouseCoords.y - (zoomLevel.ApplyInversedTo(v->ViewHeight()) / 2));
if (previousZoomLevel > zoomLevel)
{
w.savedViewPos.x += zoomLevel.ApplyTo(diffX);
w.savedViewPos.y += zoomLevel.ApplyTo(diffY);
}
else
{
w.savedViewPos.x -= previousZoomLevel.ApplyTo(diffX);
w.savedViewPos.y -= previousZoomLevel.ApplyTo(diffY);
}
}
// HACK: Prevents the redraw from failing when there is