Fixed regression when hovering over free mode line

changelogs/2.0.2.md

@@ -6,3 +6,5 @@
 
 * Fixed a crash happening when deleting all things from the map.
 * Fixed a crash happening when deleting a group of linedefs.
+* Fixed a bug where the linedef splitting hint wouldn't show up when in FREE grid mode (introduced
+  by 2.0.0).

src/e_linedef.cc

@@ -1265,7 +1265,7 @@ void linemod::moveCoordOntoLinedef(const Document &doc, int ld, v2double_t &v)
 
 	v2double_t dv = v2 - v1;
 
-	double len_squared = dv.hypot();
+	double len_squared = pow(dv.hypot(), 2);
 
 	SYS_ASSERT(len_squared > 0);
 

src/e_linedef.h

@@ -27,9 +27,19 @@
 #ifndef __EUREKA_E_LINEDEF_H__
 #define __EUREKA_E_LINEDEF_H__
 
+#include "Side.h"
 #include "DocumentModule.h"
+#include "sys_type.h"
+#include <vector>
 
+class EditOperation;
+class FFixedPoint;
+class LineDef;
+class Objid;
 class selection_c;
+class SString;
+struct v2double_t;
+struct SideDef;
 
 namespace linemod
 {

test/CMakeLists.txt

@@ -22,8 +22,8 @@ list(FILTER fltk_libs INCLUDE REGEX fltk)
 # eurekasrc files
 
 add_library(
-    testutils 
-    STATIC 
+    testutils
+    STATIC
     testUtils/FatalHandler.cpp
     testUtils/FatalHandler.hpp
     testUtils/TempDirContext.cpp
@@ -53,6 +53,7 @@ add_executable(
     e_checks_test.cpp
     e_commands_test.cpp
     e_cutpaste_test.cpp
+    e_linedef_test.cpp
     e_objects_test.cpp
     FixedPointTest.cpp
     im_color_test.cpp

test/e_linedef_test.cpp

@@ -0,0 +1,48 @@
+//------------------------------------------------------------------------
+//
+//  Eureka DOOM Editor
+//
+//  Copyright (C) 2024 Ioan Chera
+//
+//  This program is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU General Public License
+//  as published by the Free Software Foundation; either version 2
+//  of the License, or (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//------------------------------------------------------------------------
+
+#include "e_linedef.h"
+#include "Instance.h"
+#include "gtest/gtest.h"
+
+TEST(ELinedef, MoveCoordOntoLinedef)
+{
+	Instance inst;
+	Vertex* vertex;
+	vertex = new Vertex;
+	vertex->raw_x = FFixedPoint(0);
+	vertex->raw_y = FFixedPoint(0);
+	inst.level.vertices.push_back(std::shared_ptr<Vertex>(vertex));
+	vertex = new Vertex;
+	vertex->raw_x = FFixedPoint(64);
+	vertex->raw_y = FFixedPoint(64);
+	inst.level.vertices.push_back(std::shared_ptr<Vertex>(vertex));
+
+
+	inst.level.linedefs.push_back(std::make_shared<LineDef>());
+	auto& L = inst.level.linedefs.back();
+	L->start = 0;
+	L->end = 1;
+
+	v2double_t v = { 32, 16 };
+
+	linemod::moveCoordOntoLinedef(inst.level, 0, v);
+
+	ASSERT_DOUBLE_EQ(v.x, 24.0);
+	ASSERT_DOUBLE_EQ(v.y, 24.0);
+}