2V3-b: click on the ground to walk; read the terrain attribute map

CScreen::SetCursorPosition and CPythonGraphic::SetCursorPosition are the 40250
bodies, so RenderGame builds the pick ray under the cursor each frame.
CPythonBackground::GetPickingPoint* march that ray as
CMapOutdoor::__PickTerrainHeight does, against the native CMapManager height
(PR_FLOAT_TO_INT's x87 rounding becomes floor); object picking waits for
CMapOutdoor. CMapManager::isAttrOn reads the packed <map>/<xxxyyy>/attr.atr
as CMapOutdoor::isAttrOn + CTerrain::isAttrOn do, and CheckAdvancing with its
collision checkers is verbatim (no map objects are registered yet). All of
this stays in the pending/platform layer and is marked ADAPTED.

port.login_flow clicks the ground below the actor after the key walk. The
actor walks to the picked point (334 cm offline), and the fake server sees
FUNC_MOVE, then FUNC_WAIT. It also checks that the actor's cell is free and
that its terrain block has blocked cells. port.login_live against the real
server passed (key 133 cm, click 296 cm), and python_game_render_test.sh
passes offline. MT_TEST_MODE=python_ui now adds the 3D surface, so the port
route can be played by hand.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

extension/src/platform/EterLib/GrpScreen.cpp

@@ -244,9 +244,35 @@ auto CScreen::SetClearStencil(DWORD) -> void
 	MT_PLATFORM_STUB();
 }
 
-auto CScreen::SetCursorPosition(int, int, int, int) -> void
+// 40250 GrpScreen.cpp:487, verbatim: the pick ray through the cursor.
+void CScreen::SetCursorPosition(int x, int y, int hres, int vres)
 {
-	MT_PLATFORM_STUB();
+	D3DXVECTOR3 v;
+	v.x = -(((2.0f * x) / hres) - 1) / ms_matProj._11;
+	v.y = (((2.0f * y) / vres) - 1) / ms_matProj._22;
+	v.z = 1.0f;
+
+    D3DXMATRIX matViewInverse=ms_matInverseView;
+    //D3DXMatrixInverse(&matViewInverse, NULL, &ms_matView);
+
+    ms_vtPickRayDir.x = v.x * matViewInverse._11 +
+						v.y * matViewInverse._21 +
+						v.z * matViewInverse._31;
+
+    ms_vtPickRayDir.y = v.x * matViewInverse._12 +
+						v.y * matViewInverse._22 +
+						v.z * matViewInverse._32;
+
+    ms_vtPickRayDir.z = v.x * matViewInverse._13 +
+						v.y * matViewInverse._23 +
+						v.z * matViewInverse._33;
+
+    ms_vtPickRayOrig.x = matViewInverse._41;
+    ms_vtPickRayOrig.y = matViewInverse._42;
+    ms_vtPickRayOrig.z = matViewInverse._43;
+
+	ms_Ray.SetStartPoint(ms_vtPickRayOrig);
+	ms_Ray.SetDirection(-ms_vtPickRayDir, 51200.0f);
 }
 
 auto CScreen::GetCursorPosition(float *, float *, float *) -> bool

extension/src/platform/EterPythonLib/PythonGraphic.cpp

@@ -36,7 +36,11 @@ long CPythonGraphic::GenerateColor(float r, float g, float b, float a) { return
 void CPythonGraphic::RenderUpButton(float, float, float, float) { MT_PLATFORM_STUB(); }
 void CPythonGraphic::RenderDownButton(float, float, float, float) { MT_PLATFORM_STUB(); }
 bool CPythonGraphic::SaveScreenShot(const char*) { MT_PLATFORM_STUB(); return false; }
-void CPythonGraphic::SetCursorPosition(int, int) { MT_PLATFORM_STUB(); }
+// 40250 PythonGraphic.cpp:52.
+void CPythonGraphic::SetCursorPosition(int x, int y)
+{
+	CScreen::SetCursorPosition(x, y, ms_iWidth, ms_iHeight);
+}
 DWORD CPythonGraphic::GetAvailableMemory() { MT_PLATFORM_STUB(); return 0; }
 void CPythonGraphic::SetGamma(float) { MT_PLATFORM_STUB(); }
 

extension/src/platform/pending/GameLib/MapManager.cpp

@@ -27,6 +27,7 @@ struct NativeMapState {
 	fmt::MapSetting setting;
 	std::string name;
 	std::map<std::pair<int, int>, fmt::HeightMap> heights;
+	std::map<std::pair<int, int>, std::vector<BYTE>> attrs; // attr.atr payload, empty when unreadable
 	bool ready = false;
 };
 std::map<const CMapManager *, NativeMapState> s_native_maps;
@@ -61,6 +62,28 @@ bool load_height_tile(NativeMapState &state, int tx, int ty)
 	state.heights.emplace(key, std::move(map));
 	return true;
 }
+
+// attr.atr: {u16 magic=2634, u16 w=256, u16 h=256} + 256*256 bytes (40250 CTerrainImpl::LoadAttrMap).
+const std::vector<BYTE> *attr_tile(NativeMapState &state, int tx, int ty)
+{
+	if (tx < 0 || ty < 0 || tx >= state.setting.map_size_x || ty >= state.setting.map_size_y)
+		return nullptr;
+	const auto key = std::make_pair(tx, ty);
+	auto found = state.attrs.find(key);
+	if (found == state.attrs.end())
+	{
+		char tile[16];
+		snprintf(tile, sizeof(tile), "%03d%03d", tx, ty);
+		std::string bytes;
+		std::vector<BYTE> attr;
+		const size_t payload = size_t(CTerrainImpl::ATTRMAP_XSIZE) * CTerrainImpl::ATTRMAP_YSIZE;
+		if (pack_bytes(state.name + "/" + tile + "/attr.atr", bytes) && bytes.size() == 6 + payload &&
+			(static_cast<unsigned char>(bytes[0]) | (static_cast<unsigned char>(bytes[1]) << 8)) == 2634)
+			attr.assign(bytes.begin() + 6, bytes.end());
+		found = state.attrs.emplace(key, std::move(attr)).first;
+	}
+	return found->second.empty() ? nullptr : &found->second;
+}
 }
 
 auto CMapManager::GetHeight(float fx, float fy) -> float
@@ -194,16 +217,56 @@ auto CMapManager::GetShadowMapColor(float, float) -> DWORD
 	return mt_platform_stub_return<DWORD>();
 }
 
-auto CMapManager::isAttrOn(float, float, BYTE) -> bool
+// 40250 MapManager.cpp:506 → CMapOutdoor::isAttrOn (MapOutdoor.cpp:1202).
+bool CMapManager::isAttrOn(float fX, float fY, BYTE byAttr)
 {
-	MT_PLATFORM_STUB();
-	return mt_platform_stub_return<bool>();
+	if (!IsMapReady())
+		return false;
+
+	// PORT: PR_FLOAT_TO_INT is x87 fistp (round to nearest) corrected down, i.e. floor.
+	return isAttrOn(int(std::floor(fX)), int(std::floor(fY)), byAttr);
 }
 
-auto CMapManager::isAttrOn(int, int, BYTE) -> bool
+// 40250 MapManager.cpp:524 → CMapOutdoor::isAttrOn (MapOutdoor.cpp:1220) → CTerrain::isAttrOn (AreaTerrain.cpp:487).
+// PORT: CMapOutdoor/CTerrain are not ported; the terrain count and the attribute map come from the native map
+// state (Setting.txt MapSize, <map>/<xxxyyy>/attr.atr) instead of the loaded CTerrain list.
+bool CMapManager::isAttrOn(int iX, int iY, BYTE byAttr)
 {
-	MT_PLATFORM_STUB();
-	return mt_platform_stub_return<bool>();
+	if (!IsMapReady())
+		return false;
+	auto state = s_native_maps.find(this);
+	if (state == s_native_maps.end() || !state->second.ready)
+		return false;
+	const int countX = state->second.setting.map_size_x, countY = state->second.setting.map_size_y;
+	if (iX < 0 || iY < 0 || iX > countX * CTerrainImpl::TERRAIN_XSIZE || iY > countY * CTerrainImpl::TERRAIN_YSIZE)
+		return false;
+
+	WORD wTerrainCoordX, wTerrainCoordY;
+	wTerrainCoordX = iX / CTerrainImpl::TERRAIN_XSIZE;
+	wTerrainCoordY = iY / CTerrainImpl::TERRAIN_YSIZE;
+
+	const std::vector<BYTE> *attr = attr_tile(state->second, wTerrainCoordX, wTerrainCoordY);
+	if (!attr)
+		return false;
+
+	WORD wLocalX, wLocalY;
+	wLocalX = (iX - wTerrainCoordX * CTerrainImpl::TERRAIN_XSIZE) / (CTerrainImpl::HALF_CELLSCALE);
+	wLocalY = (iY - wTerrainCoordY * CTerrainImpl::TERRAIN_YSIZE) / (CTerrainImpl::HALF_CELLSCALE);
+
+	if (wLocalX >= CTerrainImpl::ATTRMAP_XSIZE || wLocalY >= CTerrainImpl::ATTRMAP_YSIZE)
+		return false;
+
+	BYTE byMapAttr = (*attr)[wLocalY * CTerrainImpl::ATTRMAP_XSIZE + wLocalX];
+
+	if ( byAttr < 16 )
+		return (byMapAttr & byAttr) ? true : false;
+	else
+	{
+		if ( byAttr/16 == byMapAttr/16)
+			return true;
+		else
+			return false;
+	}
 }
 
 auto CMapManager::BeginEnvironment() -> void

extension/src/platform/pending/UserInterface/PythonBackground.cpp

@@ -3,6 +3,7 @@
 // (docs/PORT-PLAN.md).
 #include "UserInterface/StdAfx.h"
 #include "UserInterface/PythonBackground.h"
+#include "UserInterface/InstanceBase.h"
 #include "EterLib/StateManager.h"
 
 #include "../../PlatformStub.h"
@@ -107,16 +108,143 @@ CPythonBackground::~CPythonBackground()
 	MT_PLATFORM_STUB();
 }
 
-auto CPythonBackground::CheckAdvancing(CInstanceBase *) -> bool
+// 40250 PythonBackground.cpp:547-608, verbatim. No map objects are registered with CCullingManager until
+// CMapOutdoor is ported, so the checkers see no opponent and advancing is never blocked.
+struct CollisionChecker
 {
-	MT_PLATFORM_STUB();
-	return mt_platform_stub_return<bool>();
+	bool isBlocked;
+	CInstanceBase* pInstance;
+	CollisionChecker(CInstanceBase* pInstance) : pInstance(pInstance), isBlocked(false) {}
+	void operator () (CGraphicObjectInstance* pOpponent)
+	{
+		if (isBlocked)
+			return;
+
+		if (!pOpponent)
+			return;
+
+		if (pInstance->IsBlockObject(*pOpponent))
+			isBlocked=true;
+	}
+};
+
+struct CollisionAdjustChecker
+{
+	bool isBlocked;
+	CInstanceBase* pInstance;
+	CollisionAdjustChecker(CInstanceBase* pInstance) : pInstance(pInstance), isBlocked(false) {}
+	void operator () (CGraphicObjectInstance* pOpponent)
+	{
+		if (!pOpponent)
+			return;
+
+		if (pInstance->AvoidObject(*pOpponent))
+			isBlocked=true;
+	}
+};
+
+bool CPythonBackground::CheckAdvancing(CInstanceBase * pInstance)
+{
+	if (!IsMapReady())
+		return true;
+
+	Vector3d center;
+	float radius;
+	pInstance->GetGraphicThingInstanceRef().GetBoundingSphere(center,radius);
+
+	CCullingManager & rkCullingMgr = CCullingManager::Instance();
+
+	CollisionAdjustChecker kCollisionAdjustChecker(pInstance);
+	rkCullingMgr.ForInRange(center, radius, &kCollisionAdjustChecker);
+	if (kCollisionAdjustChecker.isBlocked)
+	{
+		CollisionChecker kCollisionChecker(pInstance);
+		rkCullingMgr.ForInRange(center, radius, &kCollisionChecker);
+		if (kCollisionChecker.isBlocked)
+		{
+			pInstance->BlockMovement();
+			return true;
+		}
+		else
+		{
+			pInstance->NEW_MoveToDestPixelPositionDirection(pInstance->NEW_GetDstPixelPositionRef());
+		}
+		return false;
+	}
+	return false;
 }
 
-auto CPythonBackground::GetPickingPointWithRayOnlyTerrain(const CRay &, D3DXVECTOR3 *) -> bool
+namespace
 {
-	MT_PLATFORM_STUB();
-	return mt_platform_stub_return<bool>();
+// 40250 CMapOutdoor::__PickTerrainHeight (MapOutdoor.cpp:448), marching the ray against the terrain height.
+// PORT: CMapOutdoor is not ported; the terrain is the native CMapManager height map, and GetTerrainNum/
+// GetTerrainPointer become "the map is ready" (GetHeight reads the height tile under the point).
+bool PickTerrainHeight(CMapManager& rkMap, float& fPos, const D3DXVECTOR3& v3Start, const D3DXVECTOR3& v3End, float fStep,
+	float fRayRange, float fLimitRange, D3DXVECTOR3* pv3Pick)
+{
+	D3DXVECTOR3 v3CurPos;
+
+	float fRayRangeInv=1.0f/fRayRange;
+	while (fPos < fRayRange && fPos<fLimitRange)
+	{
+		D3DXVec3Lerp(&v3CurPos, &v3Start, &v3End, fPos*fRayRangeInv);
+		float fMultiplier = 1.0f;
+		if (rkMap.IsMapReady())
+		{
+			// PORT: PR_FLOAT_TO_INT is x87 fistp (round to nearest) corrected down, i.e. floor.
+			int ix = int(std::floor(v3CurPos.x)), iy = int(std::floor(fabs(v3CurPos.y)));
+			float fMapHeight = rkMap.GetHeight(float(ix), float(iy));
+			if ( fMapHeight >= v3CurPos.z)
+			{
+				*pv3Pick = v3CurPos;
+				return true;
+			}
+			else
+			{
+				fMultiplier = fMAX(1.0f, 0.01f * ( v3CurPos.z - fMapHeight ) );
+			}
+		}
+		fPos += fStep * fMultiplier;
+	}
+
+	return false;
+}
+}
+
+// 40250 CMapOutdoor::GetPickingPointWithRayOnlyTerrain (MapOutdoor.cpp:549).
+bool CPythonBackground::GetPickingPointWithRayOnlyTerrain(const CRay & rRay, D3DXVECTOR3 * v3IntersectPt)
+{
+	bool bTerrainPick = false;
+	D3DXVECTOR3 v3TerrainPick;
+
+	D3DXVECTOR3 v3Start, v3End, v3Dir;
+	float fRayRange;
+	rRay.GetStartPoint(&v3Start);
+	rRay.GetDirection(&v3Dir, &fRayRange);
+	rRay.GetEndPoint(&v3End);
+
+	float fPos = 0.0f;
+	bTerrainPick=true;
+	if (!PickTerrainHeight(*this, fPos, v3Start, v3End, 5.0f, fRayRange, 5000.0f, &v3TerrainPick))
+		if (!PickTerrainHeight(*this, fPos, v3Start, v3End, 10.0f, fRayRange, 10000.0f, &v3TerrainPick))
+			if (!PickTerrainHeight(*this, fPos, v3Start, v3End, 100.0f, fRayRange, 100000.0f, &v3TerrainPick))
+					bTerrainPick=false;
+
+	if (bTerrainPick)
+	{
+		*v3IntersectPt = v3TerrainPick;
+		return true;
+	}
+
+	return false;
+}
+
+// 40250 CMapOutdoor::GetPickingPointWithRay (MapOutdoor.cpp:484).
+// PORT: the object pick (FGetPickingPoint over CCullingManager) needs CMapOutdoor's area objects; only the
+// terrain half runs until the map is ported.
+bool CPythonBackground::GetPickingPointWithRay(const CRay & rRay, D3DXVECTOR3 * v3IntersectPt)
+{
+	return GetPickingPointWithRayOnlyTerrain(rRay, v3IntersectPt);
 }
 
 // 40250 PythonBackground.cpp:173 (CPythonApplication::RenderGame's SetPerspective); m_pkMap stays null
@@ -207,8 +335,8 @@ void CPythonBackground::Initialize()
 	CMapManager::Initialize();
 }
 
-auto CPythonBackground::GetPickingPoint(D3DXVECTOR3 *) -> bool
+// 40250 PythonBackground.cpp:263 → CMapOutdoor::GetPickingPoint (MapOutdoor.cpp:443): the cursor ray.
+bool CPythonBackground::GetPickingPoint(D3DXVECTOR3 * v3IntersectPt)
 {
-	MT_PLATFORM_STUB();
-	return mt_platform_stub_return<bool>();
+	return GetPickingPointWithRay(ms_Ray, v3IntersectPt);
 }