Node / meshtastic / Meshtastic-Android / files / androidApp / src / testGoogle / kotlin / org / meshtastic / app / map / offline / terrain / ElevationStitcherTest.kt

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T8b949e/*

* Copyright (c) 2026 Meshtastic LLC

*

* 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 3 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.

*

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <https://www.gnu.org/licenses/>.

*/

Tff7b72package T7ee787org.meshtastic.app.map.offline.terrain

Tff7b72import T7ee787org.meshtastic.feature.map.terrain.ElevationTile

Tff7b72import T7ee787kotlin.test.Test

Tff7b72import T7ee787kotlin.test.assertEquals

Tff7b72class T56d364ElevationStitcherTest Tb4b4b4{

T8b949e// 2x2 center tile: (x=0,y=0)=1, (x=1,y=0)=2, (x=0,y=1)=3, (x=1,y=1)=4.

Tff7b72private Tff7b72val Te6edf3center Tff7b72= Te6edf3ElevationTileTb4b4b4(Te6edf3width Tff7b72= T79c0ff2Tb4b4b4, Te6edf3height Tff7b72= T79c0ff2Tb4b4b4, Te6edf3elevations Tff7b72= Te6edf3floatArrayOfTb4b4b4(T79c0ff1fTb4b4b4, T79c0ff2fTb4b4b4, T79c0ff3fTb4b4b4, T79c0ff4fTb4b4b4)Tb4b4b4)

Tf0883e@Test

Tff7b72fun Td2a8ff`the interior of the padded tile is exactly the center tile, offset by the margin`Tb4b4b4(Tb4b4b4) Tb4b4b4{

Tff7b72val Te6edf3padded Tff7b72= Te6edf3ElevationStitcherTb4b4b4.Te6edf3buildPaddedTb4b4b4(Te6edf3centerTb4b4b4, Te6edf3neighbors Tff7b72= Te6edf3emptyMapTb4b4b4(Tb4b4b4)Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(T79c0ff4Tb4b4b4, Te6edf3paddedTb4b4b4.Te6edf3widthTb4b4b4)

Te6edf3assertEqualsTb4b4b4(T79c0ff4Tb4b4b4, Te6edf3paddedTb4b4b4.Te6edf3heightTb4b4b4)

Te6edf3assertEqualsTb4b4b4(T79c0ff1fTb4b4b4, Te6edf3paddedTb4b4b4.Te6edf3elevationAtTb4b4b4(T79c0ff1Tb4b4b4, T79c0ff1Tb4b4b4)Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(T79c0ff2fTb4b4b4, Te6edf3paddedTb4b4b4.Te6edf3elevationAtTb4b4b4(T79c0ff2Tb4b4b4, T79c0ff1Tb4b4b4)Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(T79c0ff3fTb4b4b4, Te6edf3paddedTb4b4b4.Te6edf3elevationAtTb4b4b4(T79c0ff1Tb4b4b4, T79c0ff2Tb4b4b4)Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(T79c0ff4fTb4b4b4, Te6edf3paddedTb4b4b4.Te6edf3elevationAtTb4b4b4(T79c0ff2Tb4b4b4, T79c0ff2Tb4b4b4)Tb4b4b4)

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ff`a missing neighbor's padding clamps to the center tile's own edge, not a crash or zero`Tb4b4b4(Tb4b4b4) Tb4b4b4{

Tff7b72val Te6edf3padded Tff7b72= Te6edf3ElevationStitcherTb4b4b4.Te6edf3buildPaddedTb4b4b4(Te6edf3centerTb4b4b4, Te6edf3neighbors Tff7b72= Te6edf3emptyMapTb4b4b4(Tb4b4b4)Tb4b4b4)

T8b949e// Padded (0,0) is one pixel NW of the center tile's own (0,0); with no NW neighbor it should clamp to the

T8b949e// center tile's own corner value, same as ElevationTile.elevationAt's own out-of-bounds behavior.

Te6edf3assertEqualsTb4b4b4(T79c0ff1fTb4b4b4, Te6edf3paddedTb4b4b4.Te6edf3elevationAtTb4b4b4(T79c0ff0Tb4b4b4, T79c0ff0Tb4b4b4)Tb4b4b4)

T8b949e// Padded bottom row, one pixel south of center's own bottom-left: clamps to center's own bottom row.

Te6edf3assertEqualsTb4b4b4(T79c0ff3fTb4b4b4, Te6edf3paddedTb4b4b4.Te6edf3elevationAtTb4b4b4(T79c0ff1Tb4b4b4, T79c0ff3Tb4b4b4)Tb4b4b4)

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ff`a north neighbor's bottom row supplies the padded tile's top row`Tb4b4b4(Tb4b4b4) Tb4b4b4{

T8b949e// North neighbor's bottom row (y=1): (0,1)=101, (1,1)=102 — top row is irrelevant filler.

Tff7b72val Te6edf3north Tff7b72= Te6edf3ElevationTileTb4b4b4(Te6edf3width Tff7b72= T79c0ff2Tb4b4b4, Te6edf3height Tff7b72= T79c0ff2Tb4b4b4, Te6edf3elevations Tff7b72= Te6edf3floatArrayOfTb4b4b4(T79c0ff2T79c0ff0T79c0ff1fTb4b4b4, T79c0ff2T79c0ff0T79c0ff2fTb4b4b4, T79c0ff1T79c0ff0T79c0ff1fTb4b4b4, T79c0ff1T79c0ff0T79c0ff2fTb4b4b4)Tb4b4b4)

Tff7b72val Te6edf3padded Tff7b72= Te6edf3ElevationStitcherTb4b4b4.Te6edf3buildPaddedTb4b4b4(Te6edf3centerTb4b4b4, Te6edf3neighbors Tff7b72= Te6edf3mapOfTb4b4b4(Tb4b4b4(T79c0ff0 Te6edf3to Tff7b72-T79c0ff1Tb4b4b4) Te6edf3to Te6edf3northTb4b4b4)Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(T79c0ff1T79c0ff0T79c0ff1fTb4b4b4, Te6edf3paddedTb4b4b4.Te6edf3elevationAtTb4b4b4(T79c0ff1Tb4b4b4, T79c0ff0Tb4b4b4)Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(T79c0ff1T79c0ff0T79c0ff2fTb4b4b4, Te6edf3paddedTb4b4b4.Te6edf3elevationAtTb4b4b4(T79c0ff2Tb4b4b4, T79c0ff0Tb4b4b4)Tb4b4b4)

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ff`a west neighbor's rightmost column supplies the padded tile's left column`Tb4b4b4(Tb4b4b4) Tb4b4b4{

T8b949e// West neighbor's right column (x=1): (1,0)=301, (1,1)=302 — left column is irrelevant filler.

Tff7b72val Te6edf3west Tff7b72= Te6edf3ElevationTileTb4b4b4(Te6edf3width Tff7b72= T79c0ff2Tb4b4b4, Te6edf3height Tff7b72= T79c0ff2Tb4b4b4, Te6edf3elevations Tff7b72= Te6edf3floatArrayOfTb4b4b4(T79c0ff9T79c0ff9T79c0ff9fTb4b4b4, T79c0ff3T79c0ff0T79c0ff1fTb4b4b4, T79c0ff9T79c0ff9T79c0ff9fTb4b4b4, T79c0ff3T79c0ff0T79c0ff2fTb4b4b4)Tb4b4b4)

Tff7b72val Te6edf3padded Tff7b72= Te6edf3ElevationStitcherTb4b4b4.Te6edf3buildPaddedTb4b4b4(Te6edf3centerTb4b4b4, Te6edf3neighbors Tff7b72= Te6edf3mapOfTb4b4b4(Tb4b4b4(Tff7b72-T79c0ff1 Te6edf3to T79c0ff0Tb4b4b4) Te6edf3to Te6edf3westTb4b4b4)Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(T79c0ff3T79c0ff0T79c0ff1fTb4b4b4, Te6edf3paddedTb4b4b4.Te6edf3elevationAtTb4b4b4(T79c0ff0Tb4b4b4, T79c0ff1Tb4b4b4)Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(T79c0ff3T79c0ff0T79c0ff2fTb4b4b4, Te6edf3paddedTb4b4b4.Te6edf3elevationAtTb4b4b4(T79c0ff0Tb4b4b4, T79c0ff2Tb4b4b4)Tb4b4b4)

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ff`a diagonal neighbor supplies exactly the padded tile's own corner`Tb4b4b4(Tb4b4b4) Tb4b4b4{

T8b949e// NW neighbor's own bottom-right pixel (1,1)=401 is the only one that should ever be read for this corner.

Tff7b72val Te6edf3northwest Tff7b72= Te6edf3ElevationTileTb4b4b4(Te6edf3width Tff7b72= T79c0ff2Tb4b4b4, Te6edf3height Tff7b72= T79c0ff2Tb4b4b4, Te6edf3elevations Tff7b72= Te6edf3floatArrayOfTb4b4b4(T79c0ff9T79c0ff9T79c0ff9fTb4b4b4, T79c0ff9T79c0ff9T79c0ff9fTb4b4b4, T79c0ff9T79c0ff9T79c0ff9fTb4b4b4, T79c0ff4T79c0ff0T79c0ff1fTb4b4b4)Tb4b4b4)

Tff7b72val Te6edf3padded Tff7b72= Te6edf3ElevationStitcherTb4b4b4.Te6edf3buildPaddedTb4b4b4(Te6edf3centerTb4b4b4, Te6edf3neighbors Tff7b72= Te6edf3mapOfTb4b4b4(Tb4b4b4(Tff7b72-T79c0ff1 Te6edf3to Tff7b72-T79c0ff1Tb4b4b4) Te6edf3to Te6edf3northwestTb4b4b4)Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(T79c0ff4T79c0ff0T79c0ff1fTb4b4b4, Te6edf3paddedTb4b4b4.Te6edf3elevationAtTb4b4b4(T79c0ff0Tb4b4b4, T79c0ff0Tb4b4b4)Tb4b4b4)

T8b949e// The other three corners have no neighbor supplied, so they still clamp to center's own corners.

Te6edf3assertEqualsTb4b4b4(T79c0ff2fTb4b4b4, Te6edf3paddedTb4b4b4.Te6edf3elevationAtTb4b4b4(T79c0ff3Tb4b4b4, T79c0ff0Tb4b4b4)Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(T79c0ff3fTb4b4b4, Te6edf3paddedTb4b4b4.Te6edf3elevationAtTb4b4b4(T79c0ff0Tb4b4b4, T79c0ff3Tb4b4b4)Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(T79c0ff4fTb4b4b4, Te6edf3paddedTb4b4b4.Te6edf3elevationAtTb4b4b4(T79c0ff3Tb4b4b4, T79c0ff3Tb4b4b4)Tb4b4b4)

Tb4b4b4}

Tb4b4b4}