diff --git a/CMCore b/CMCore
index 09d9678e..5107b34d 160000
--- a/CMCore
+++ b/CMCore
@@ -1 +1 @@
-Subproject commit 09d9678e112a84f29dd4ba2165fe25fd91320569
+Subproject commit 5107b34d1617413c40537502181694f80f82782f
diff --git a/example/Gizmo/PlaneGrid3D.cpp b/example/Gizmo/PlaneGrid3D.cpp
index e1dc1d04..17118fde 100644
--- a/example/Gizmo/PlaneGrid3D.cpp
+++ b/example/Gizmo/PlaneGrid3D.cpp
@@ -72,19 +72,14 @@ private:
 
         struct PlaneGridCreateInfo pgci;
 
-        pgci.coord[0]=Vector3f(-100,-100,0);
-        pgci.coord[1]=Vector3f( 100,-100,0);
-        pgci.coord[2]=Vector3f( 100, 100,0);
-        pgci.coord[3]=Vector3f(-100, 100,0);
+        pgci.grid_size.width =32;
+        pgci.grid_size.height=32;
 
-        pgci.step.x=32;
-        pgci.step.y=32;
-
-        pgci.side_step.x=8;
-        pgci.side_step.y=8;
+        pgci.sub_count.width =8;
+        pgci.sub_count.height=8;
 
         pgci.lum=0.5;
-        pgci.side_lum=1.0;
+        pgci.sub_lum=1.0;
 
         ro_plane_grid=CreatePlaneGrid(db,material->GetDefaultVIL(),&pgci);
 
@@ -109,7 +104,7 @@ private:
         Add(material_instance[1],rotate(HGL_RAD_90,0,1,0));
         Add(material_instance[2],rotate(HGL_RAD_90,1,0,0));
 
-        camera->pos=Vector3f(200,200,200);
+        camera->pos=Vector3f(32,32,32);
         camera_control->SetTarget(Vector3f(0,0,0));
         camera_control->Refresh();
 
diff --git a/inc/hgl/graph/InlineGeometry.h b/inc/hgl/graph/InlineGeometry.h
index 91795874..70d9ce85 100644
--- a/inc/hgl/graph/InlineGeometry.h
+++ b/inc/hgl/graph/InlineGeometry.h
@@ -4,6 +4,7 @@
 #include<hgl/graph/VK.h>
 #include<hgl/math/Vector.h>
 #include<hgl/type/RectScope.h>
+#include<hgl/type/Size2.h>
 #include<hgl/color/Color4f.h>
 #include<hgl/graph/AABB.h>
 namespace hgl
@@ -59,17 +60,17 @@ namespace hgl
             Primitive *CreateCircle(RenderResource *db,const VIL *vil,const CircleCreateInfo *cci);
 
             /**
-             * 平面网格创建信息
+             * 平面网格创建信息<br>
+             * 会创建一个在XY平面上居中的网格，单个格子尺寸为1。
              */
             struct PlaneGridCreateInfo
             {
-                Vector3f coord[4];
-                Vector2u step;
+                Size2u grid_size;       ///<格子数量
 
-                Vector2u side_step;     //到边界的步数
+                Size2u sub_count;       ///<细分格子数量
 
-                float lum;              //一般线条颜色
-                float side_lum;         //边界线条颜色
+                float lum;              ///<一般线条颜色
+                float sub_lum;          ///<细分及边界线条颜色
             };//struct PlaneGridCreateInfo
 
             /**
diff --git a/src/SceneGraph/InlineGeometry.cpp b/src/SceneGraph/InlineGeometry.cpp
index 55e817f0..39fb3d67 100644
--- a/src/SceneGraph/InlineGeometry.cpp
+++ b/src/SceneGraph/InlineGeometry.cpp
@@ -166,41 +166,44 @@ namespace hgl
             {
                 PrimitiveCreater rc(db,vil);
 
-                if(!rc.Init(((pgci->step.x+1)+(pgci->step.y+1))*2))
+                if(!rc.Init(((pgci->grid_size.width+1)+(pgci->grid_size.height+1))*2))
                     return(nullptr);
 
                 AutoDelete<VB3f> vertex=rc.AccessVAD<VB3f>(VAN::Position);
-                for(uint row=0;row<=pgci->step.x;row++)
-                {
-                    float pos=float(row)/float(pgci->step.x);
 
-                    vertex->WriteLine(  to(pgci->coord[0],pgci->coord[1],pos),
-                                        to(pgci->coord[3],pgci->coord[2],pos));
+                const float right=float(pgci->grid_size.width)/2.0f;
+                const float left =-right;
+
+                const float bottom=float(pgci->grid_size.height)/2.0f;
+                const float top   =-bottom;
+
+                for(int row=0;row<=pgci->grid_size.height;row++)
+                {
+                    vertex->WriteLine(  Vector3f(left ,top+row,0),
+                                        Vector3f(right,top+row,0));
                 }
 
-                for(uint col=0;col<=pgci->step.y;col++)
+                for(int col=0;col<=pgci->grid_size.width;col++)
                 {
-                    float pos=float(col)/float(pgci->step.y);
-
-                    vertex->WriteLine(to(pgci->coord[1],pgci->coord[2],pos),
-                                      to(pgci->coord[0],pgci->coord[3],pos));
+                    vertex->WriteLine(Vector3f(left+col,top,   0),
+                                      Vector3f(left+col,bottom,0));
                 }
 
                 AutoDelete<VB1f> lum=rc.AccessVAD<VB1f>(VAN::Luminance);
                 if(lum)
                 {
-                    for(uint row=0;row<=pgci->step.x;row++)
+                    for(int row=0;row<=pgci->grid_size.height;row++)
                     {
-                        if((row%pgci->side_step.x)==0)
-                            lum->RepeatWrite(pgci->side_lum,2);
+                        if((row%pgci->sub_count.height)==0)
+                            lum->RepeatWrite(pgci->sub_lum,2);
                         else
                             lum->RepeatWrite(pgci->lum,2);
                     }
 
-                    for(uint col=0;col<=pgci->step.y;col++)
+                    for(int col=0;col<=pgci->grid_size.width;col++)
                     {
-                        if((col%pgci->side_step.y)==0)
-                            lum->RepeatWrite(pgci->side_lum,2);
+                        if((col%pgci->sub_count.width)==0)
+                            lum->RepeatWrite(pgci->sub_lum,2);
                         else
                             lum->RepeatWrite(pgci->lum,2);
                     }