From 38e5bfe234235aed7aa2673bdd09f658eb9606f2 Mon Sep 17 00:00:00 2001
From: cutealien <cutealien@dfc29bdd-3216-0410-991c-e03cc46cb475>
Date: Wed, 24 Aug 2022 12:55:45 +0000
Subject: [PATCH] Fix Collada (.dae) writing with 32 bit meshbuffers Was still
 handling them as 16-bit buffers.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6416 dfc29bdd-3216-0410-991c-e03cc46cb475
---
 source/Irrlicht/CColladaMeshWriter.cpp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/source/Irrlicht/CColladaMeshWriter.cpp b/source/Irrlicht/CColladaMeshWriter.cpp
index 496b15ae..91a0a235 100644
--- a/source/Irrlicht/CColladaMeshWriter.cpp
+++ b/source/Irrlicht/CColladaMeshWriter.cpp
@@ -1865,12 +1865,16 @@ void CColladaMeshWriter::writeMeshGeometry(const irr::core::stringc& meshname, s
 
 		Writer->writeElement("p", false);
 
+		const video::E_INDEX_TYPE iType = buffer->getIndexType();
+		const u16* idx16 = buffer->getIndices();
+		const u32* idx32 = (u32*)buffer->getIndices();
+
 		core::stringc strP;
 		strP.reserve(100);
 		for (u32 p=0; p<polyCount; ++p)
 		{
 			// Irrlicht uses clockwise, Collada uses counter-clockwise to define front-face
-			u32 irrIdx = buffer->getIndices()[(p*3) + 2];
+			u32 irrIdx = iType == video::EIT_16BIT ? idx16[p*3 + 2] : idx32[p*3 + 2];
 			strP = "";
 			strP += irrIdx + posIdx;
 			strP += " ";
@@ -1884,7 +1888,7 @@ void CColladaMeshWriter::writeMeshGeometry(const irr::core::stringc& meshname, s
 				strP += " ";
 			}
 
-			irrIdx = buffer->getIndices()[(p*3) + 1];
+			irrIdx = iType == video::EIT_16BIT ? idx16[p*3 + 1] : idx32[p*3 + 1];
 			strP += irrIdx + posIdx;
 			strP += " ";
 			strP += irrIdx + tCoordIdx;
@@ -1897,7 +1901,7 @@ void CColladaMeshWriter::writeMeshGeometry(const irr::core::stringc& meshname, s
 				strP += " ";
 			}
 
-			irrIdx = buffer->getIndices()[(p*3) + 0];
+			irrIdx = iType == video::EIT_16BIT ? idx16[p*3] : idx32[p*3];
 			strP += irrIdx + posIdx;
 			strP += " ";
 			strP += irrIdx + tCoordIdx;