diff --git a/Zframework/gcExtend.lua b/Zframework/gcExtend.lua
index a289269f..c1679335 100644
--- a/Zframework/gcExtend.lua
+++ b/Zframework/gcExtend.lua
@@ -32,6 +32,55 @@ function GC.shadedPrint(str,x,y,mode,d,clr1,clr2)
 	setColor(clr2 or COLOR.Z)
 	printf(str,x,y,w,mode)
 end
+function GC.regularPolygon(mode,x,y,R,segments,r,phase)
+	local X,Y={},{}
+	local ang=phase or 0
+	local angStep=6.283185307179586/segments
+	for i=1,segments do
+		X[i]=x+R*math.cos(ang)
+		Y[i]=y+R*math.sin(ang)
+		ang=ang+angStep
+	end
+	X[segments+1]=x+R*math.cos(ang)
+	Y[segments+1]=y+R*math.sin(ang)
+	local halfAng=6.283185307179586/segments/2
+	local erasedLen=r*math.tan(halfAng)
+	if mode=='line'then
+		erasedLen=erasedLen+1--Fix 1px cover
+		for i=1,segments do
+			--Line
+			local x1,y1,x2,y2=X[i],Y[i],X[i+1],Y[i+1]
+			local dir=math.atan2(y2-y1,x2-x1)
+			gc.line(x1+erasedLen*math.cos(dir),y1+erasedLen*math.sin(dir),x2-erasedLen*math.cos(dir),y2-erasedLen*math.sin(dir))
+
+			--Arc
+			ang=ang+angStep
+			local R2=R-r/math.cos(halfAng)
+			local arcCX,arcCY=x+R2*math.cos(ang),y+R2*math.sin(ang)
+			gc.arc('line','open',arcCX,arcCY,r,ang-halfAng,ang+halfAng)
+		end
+	elseif mode=='fill'then
+		local L={}
+		for i=1,segments do
+			--Line
+			local x1,y1,x2,y2=X[i],Y[i],X[i+1],Y[i+1]
+			local dir=math.atan2(y2-y1,x2-x1)
+			table.insert(L,x1+erasedLen*math.cos(dir))
+			table.insert(L,y1+erasedLen*math.sin(dir))
+			table.insert(L,x2-erasedLen*math.cos(dir))
+			table.insert(L,y2-erasedLen*math.sin(dir))
+
+			--Arc
+			ang=ang+angStep
+			local R2=R-r/math.cos(halfAng)
+			local arcCX,arcCY=x+R2*math.cos(ang),y+R2*math.sin(ang)
+			gc.arc('fill','open',arcCX,arcCY,r,ang-halfAng,ang+halfAng)
+		end
+		gc.polygon('fill',L)
+	else
+		error("Draw mode should be 'line' or 'fill'")
+	end
+end
 do--function GC.DO(L)
 	local cmds={
 		origin="origin",
@@ -62,67 +111,7 @@ do--function GC.DO(L)
 		fElps=function(...)gc.ellipse('fill',...)end,
 		dElps=function(...)gc.ellipse('line',...)end,
 		fPoly=function(...)gc.polygon('fill',...)end,
-
 		dPoly=function(...)gc.polygon('line',...)end,
-		fRPol=function(x,y,R,segments,r,phase)
-			local X,Y={},{}
-			local ang=phase or 0
-			local angStep=6.283185307179586/segments
-			for i=1,segments do
-				X[i]=x+R*math.cos(ang)
-				Y[i]=y+R*math.sin(ang)
-				ang=ang+angStep
-			end
-			X[segments+1]=x+R*math.cos(ang)
-			Y[segments+1]=y+R*math.sin(ang)
-
-			local L={}
-			local halfAng=6.283185307179586/segments/2
-			local erasedLen=r*math.tan(halfAng)
-			for i=1,segments do
-				--Line
-				local x1,y1,x2,y2=X[i],Y[i],X[i+1],Y[i+1]
-				local dir=math.atan2(y2-y1,x2-x1)
-				table.insert(L,x1+erasedLen*math.cos(dir))
-				table.insert(L,y1+erasedLen*math.sin(dir))
-				table.insert(L,x2-erasedLen*math.cos(dir))
-				table.insert(L,y2-erasedLen*math.sin(dir))
-
-				--Arc
-				ang=ang+angStep
-				local R2=R-r/math.cos(halfAng)
-				local arcCX,arcCY=x+R2*math.cos(ang),y+R2*math.sin(ang)
-				gc.arc('fill','open',arcCX,arcCY,r,ang-halfAng,ang+halfAng)
-			end
-			gc.polygon('fill',L)
-		end,
-		dRPol=function(x,y,R,segments,r,phase)
-			local X,Y={},{}
-			local ang=phase or 0
-			local angStep=6.283185307179586/segments
-			for i=1,segments do
-				X[i]=x+R*math.cos(ang)
-				Y[i]=y+R*math.sin(ang)
-				ang=ang+angStep
-			end
-			X[segments+1]=x+R*math.cos(ang)
-			Y[segments+1]=y+R*math.sin(ang)
-
-			local halfAng=6.283185307179586/segments/2
-			local erasedLen=r*math.tan(halfAng)
-			for i=1,segments do
-				--Line
-				local x1,y1,x2,y2=X[i],Y[i],X[i+1],Y[i+1]
-				local dir=math.atan2(y2-y1,x2-x1)
-				gc.line(x1+erasedLen*math.cos(dir),y1+erasedLen*math.sin(dir),x2-erasedLen*math.cos(dir),y2-erasedLen*math.sin(dir))
-
-				--Arc
-				ang=ang+angStep
-				local R2=R-r/math.cos(halfAng)
-				local arcCX,arcCY=x+R2*math.cos(ang),y+R2*math.sin(ang)
-				gc.arc('line','open',arcCX,arcCY,r,ang-halfAng,ang+halfAng)
-			end
-		end,
 
 		dPie=function(...)gc.arc('line',...)end,
 		dArc=function(...)gc.arc('line','open',...)end,
@@ -130,6 +119,9 @@ do--function GC.DO(L)
 		fPie=function(...)gc.arc('fill',...)end,
 		fArc=function(...)gc.arc('fill','open',...)end,
 		fBow=function(...)gc.arc('fill','closed',...)end,
+
+		fRPol=function(...)GC.regularPolygon('fill',...)end,
+		dRPol=function(...)GC.regularPolygon('line',...)end,
 	}
 	local sizeLimit=gc.getSystemLimits().texturesize
 	function GC.DO(L)