From 28e092673fb7d9dd913e17f65a672eaccf6c6d8a Mon Sep 17 00:00:00 2001
From: cutealien <cutealien@dfc29bdd-3216-0410-991c-e03cc46cb475>
Date: Wed, 20 Apr 2022 17:56:40 +0000
Subject: [PATCH] b3d writer can now write 32-bit meshbuffers. Still can't read
 it though - reader needs SSkinMeshBuffer which only supports 16 bit so far
 (changes in loader are just spelling fixes in comments)

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6346 dfc29bdd-3216-0410-991c-e03cc46cb475
---
 source/Irrlicht/CB3DMeshFileLoader.cpp |  4 +--
 source/Irrlicht/CB3DMeshWriter.cpp     | 36 +++++++++++++++++++-------
 2 files changed, 29 insertions(+), 11 deletions(-)

diff --git a/source/Irrlicht/CB3DMeshFileLoader.cpp b/source/Irrlicht/CB3DMeshFileLoader.cpp
index c473d52..2f18257 100644
--- a/source/Irrlicht/CB3DMeshFileLoader.cpp
+++ b/source/Irrlicht/CB3DMeshFileLoader.cpp
@@ -859,7 +859,7 @@ bool CB3DMeshFileLoader::readChunkBRUS()
 
 	while((B3dStack.getLast().startposition + B3dStack.getLast().length) > B3DFile->getPos()) //this chunk repeats
 	{
-		// This is what blitz basic calls a brush, like a Irrlicht Material
+		// This is what blitz basic calls a brush, like an Irrlicht material
 
 		core::stringc name;
 		readString(name);
@@ -933,7 +933,7 @@ bool CB3DMeshFileLoader::readChunkBRUS()
 			}
 		}
 
-		//If a preceeding texture slot is empty move the others down:
+		//If a preceding texture slot is empty move the others down:
 		for (i=num_textures; i>0; --i)
 		{
 			for (u32 j=i-1; j<num_textures-1; ++j)
diff --git a/source/Irrlicht/CB3DMeshWriter.cpp b/source/Irrlicht/CB3DMeshWriter.cpp
index bf5576b..d640e78 100644
--- a/source/Irrlicht/CB3DMeshWriter.cpp
+++ b/source/Irrlicht/CB3DMeshWriter.cpp
@@ -255,18 +255,36 @@ bool CB3DMeshWriter::writeMesh(io::IWriteFile* file, IMesh* const mesh, s32 flag
         file->write(&i, 4);
 
         u32 numIndices = mb->getIndexCount();
-        const u16 * const idx = (u16 *) mb->getIndices();
-        for (u32 j = 0; j < numIndices; j += 3)
+		if ( mb->getIndexType() == video::EIT_16BIT )
 		{
-            u32 tmp = idx[j] + currentMeshBufferIndex;
-            file->write(&tmp, sizeof(u32));
+			const u16 * const idx = mb->getIndices();
+			for (u32 j = 0; j < numIndices; j += 3)
+			{
+				u32 tmp = idx[j] + currentMeshBufferIndex;
+				file->write(&tmp, sizeof(u32));
 
-            tmp = idx[j + 1] + currentMeshBufferIndex;
-            file->write(&tmp, sizeof(u32));
+				tmp = idx[j + 1] + currentMeshBufferIndex;
+				file->write(&tmp, sizeof(u32));
 
-            tmp = idx[j + 2] + currentMeshBufferIndex;
-            file->write(&tmp, sizeof(u32));
-        }
+				tmp = idx[j + 2] + currentMeshBufferIndex;
+				file->write(&tmp, sizeof(u32));
+			}
+		}
+		else if ( mb->getIndexType() == video::EIT_32BIT )
+		{
+			const u32 * const idx = (const u32*) mb->getIndices();
+			for (u32 j = 0; j < numIndices; j += 3)
+			{
+				u32 tmp = idx[j] + currentMeshBufferIndex;
+				file->write(&tmp, sizeof(u32));
+
+				tmp = idx[j + 1] + currentMeshBufferIndex;
+				file->write(&tmp, sizeof(u32));
+
+				tmp = idx[j + 2] + currentMeshBufferIndex;
+				file->write(&tmp, sizeof(u32));
+			}
+		}
         writeSizeFrom(file, trisSizeAdress+4, trisSizeAdress);  // TRIS chunk size
 
         currentMeshBufferIndex += mb->getVertexCount();