Update tiny_obj_loader.h (tinyobjloader#346)

tylermorganwall · web-flow · commit f856161bb684 · 2022-10-21T17:26:51.000+09:00
Fix wrong axis selected in Newell's method
diff --git a/tiny_obj_loader.h b/tiny_obj_loader.h
@@ -1597,7 +1597,7 @@ static bool exportGroupsToShape(shape_t *shape, const PrimGroup &prim_group,
             TinyObjPoint a(point1.x - point2.x, point1.y - point2.y, point1.z - point2.z);
             TinyObjPoint b(point1.x + point2.x, point1.y + point2.y, point1.z + point2.z);
 
-            n.x += (a.x * b.z);
+            n.x += (a.y * b.z);
             n.y += (a.z * b.x);
             n.z += (a.x * b.y);
           }

Original file line number	Diff line number	Diff line change
`@@ -1597,7 +1597,7 @@ static bool exportGroupsToShape(shape_t *shape, const PrimGroup &prim_group,`
`1597`	`1597`	`TinyObjPoint a(point1.x - point2.x, point1.y - point2.y, point1.z - point2.z);`
`1598`	`1598`	`TinyObjPoint b(point1.x + point2.x, point1.y + point2.y, point1.z + point2.z);`
`1599`	`1599`
`1600`		`- n.x += (a.x * b.z);`
	`1600`	`+ n.x += (a.y * b.z);`
`1601`	`1601`	`n.y += (a.z * b.x);`
`1602`	`1602`	`n.z += (a.x * b.y);`
`1603`	`1603`	`}`