Implement deferred L-shaped belt drag placement

Belts are no longer placed on hover during a drag. Left-press anchors the
drag; as the cursor moves, a rectilinear (L-shaped) path of belt ghosts is
previewed from the anchor to the cursor — first leg parallel to the belt's
current orientation, then orthogonal — with each tile auto-oriented to follow
the path. Construction sites are placed on release: new valid tiles are placed
(subject to cumulative affordability), tiles holding only a belt are re-oriented
in place, and occupied/invalid tiles are skipped. Unaffordable tiles show no
ghost. Right-click during a drag cancels it without leaving belt build mode.

Path geometry is factored into a pure computeBeltDragPath() in lib/core with
Catch2 coverage; GameWorldView owns the classification, affordability, and
rendering against live sim state.

Implements REQ-BLD-BELT-DRAG.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y7N59FsLA5e2kuVdqe4Uhc

This commit is contained in:

Malte Langkabel

2026-07-21 12:59:21 +02:00

parent 333b72e3b7

commit 42b86785a5

7 changed files with 438 additions and 28 deletions

									
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src/test/CMakeLists.txt
									
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				@@ -8,6 +8,7 @@ add_files(

				    SimulationTest.cpp

				    BeltSystemTest.cpp

				    SurfaceMaskTest.cpp

				    BeltDragPathTest.cpp

				    BuildingTest.cpp

				    BuildingConfigTest.cpp

				    ShipTest.cpp

Implement deferred L-shaped belt drag placement

1 src/test/CMakeLists.txt Unescape Escape View File

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src/test/CMakeLists.txt

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