From e09ed3bffde4317655c11d6990a8bae5c07cc39a Mon Sep 17 00:00:00 2001
From: Pan7 <panter@gmx.net>
Date: Thu, 1 Oct 2015 17:56:00 +0200
Subject: [PATCH] usemtl for obj models

---
 libs/picomodel/pm_obj.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/libs/picomodel/pm_obj.c b/libs/picomodel/pm_obj.c
index 1c8c088f..2f6e93c4 100644
--- a/libs/picomodel/pm_obj.c
+++ b/libs/picomodel/pm_obj.c
@@ -49,7 +49,6 @@
  * - '_obj_load' code crashes in a weird way after
  *   '_obj_mtl_load' for a few .mtl files
  * - process 'mtllib' rather than using <model>.mtl
- * - handle 'usemtl' statements
  */
 /* uncomment when debugging this module */
 /* #define DEBUG_PM_OBJ */
@@ -859,6 +858,22 @@ static picoModel_t *_obj_load( PM_PARAMS_LOAD ){
 				/* increase vertex count */
 				curVertex += max;
 			}
+
+		}
+		else if ( !_pico_stricmp( p->token, "usemtl" ) ) {
+			char *materialName;
+			materialName = _pico_parse( p, 0 );
+			if( materialName || strlen( materialName ) ) {
+				picoShader_t *shader;
+				shader = PicoFindShader( model, materialName, 0 );
+				if( !shader ) {
+					shader = PicoNewShader( model );
+					PicoSetShaderName( shader, materialName );
+				}
+				if( shader && curSurface ) {
+					PicoSetSurfaceShader( curSurface, shader );
+				}
+			}
 		}
 		/* skip unparsed rest of line and continue */
 		_pico_parse_skip_rest( p );