From 69253bffcab67daf3340464905069e89707a8cf9 Mon Sep 17 00:00:00 2001
From: Erashin <alwenn.charpentier@gmail.com>
Date: Tue, 4 Mar 2025 10:16:56 +0100
Subject: [PATCH] core: use envelope part min in ETCS

Signed-off-by: Erashin <alwenn.charpentier@gmail.com>
---
 .../envelope_sim/etcs/ETCSBrakingCurves.kt    | 42 ++-----------------
 1 file changed, 4 insertions(+), 38 deletions(-)

diff --git a/core/envelope-sim/src/main/kotlin/fr/sncf/osrd/envelope_sim/etcs/ETCSBrakingCurves.kt b/core/envelope-sim/src/main/kotlin/fr/sncf/osrd/envelope_sim/etcs/ETCSBrakingCurves.kt
index 30dc52882b4..9a9b716a2fe 100644
--- a/core/envelope-sim/src/main/kotlin/fr/sncf/osrd/envelope_sim/etcs/ETCSBrakingCurves.kt
+++ b/core/envelope-sim/src/main/kotlin/fr/sncf/osrd/envelope_sim/etcs/ETCSBrakingCurves.kt
@@ -126,45 +126,11 @@ private fun computeMinSvlEoaIndCurve(
             releaseSpeedPositionSvl,
             NATIONAL_RELEASE_SPEED
         )
-    val startIntersectingRange =
-        max(slicedIndicationCurveEoa.beginPos, slicedIndicationCurveSvl.beginPos)
-    var refCurve = slicedIndicationCurveEoa
-    var otherCurve = slicedIndicationCurveSvl
-    if (
-        slicedIndicationCurveEoa.interpolateSpeed(startIntersectingRange) >
-            slicedIndicationCurveSvl.interpolateSpeed(startIntersectingRange)
-    ) {
-        refCurve = slicedIndicationCurveSvl
-        otherCurve = slicedIndicationCurveEoa
-    }
-    val pointCount = refCurve.pointCount()
-    var indicationPositions = DoubleArray(pointCount)
-    var indicationSpeeds = DoubleArray(pointCount)
-    for (i in 0 until pointCount) {
-        val newPos = refCurve.getPointPos(i)
-        val newSpeed = refCurve.getPointSpeed(i)
-        if (newPos < otherCurve.beginPos) {
-            indicationPositions[i] = newPos
-            indicationSpeeds[i] = newSpeed
-        } else if (newPos <= otherCurve.endPos) {
-            val otherSpeed = slicedIndicationCurveSvl.interpolateSpeed(newPos)
-            indicationPositions[i] = newPos
-            // TODO: unneeded for now: interpolate to not approximate position at intersection.
-            indicationSpeeds[i] = min(otherSpeed, newSpeed)
-        } else {
-            indicationPositions[i] = otherCurve.endPos
-            indicationSpeeds[i] = otherCurve.endSpeed
-            // Clean up the last unneeded points in the arrays before exiting the loop.
-            indicationPositions = indicationPositions.dropLast(pointCount - 1 - i).toDoubleArray()
-            indicationSpeeds = indicationSpeeds.dropLast(pointCount - 1 - i).toDoubleArray()
-            break
-        }
-    }
     val firstIndicationPart =
-        EnvelopePart.generateTimes(
-            listOf(EnvelopeProfile.BRAKING),
-            indicationPositions,
-            indicationSpeeds
+        EnvelopePart.min(
+            slicedIndicationCurveEoa,
+            slicedIndicationCurveSvl,
+            listOf(EnvelopeProfile.BRAKING)
         )
     if (releaseSpeedPositionSvl < releaseSpeedPositionEoa) {
         val maintainReleaseSpeedPart =