diff --git a/src/cat/LuaScriptInterface.cpp b/src/cat/LuaScriptInterface.cpp
index 1a600efe1..3d9307140 100644
--- a/src/cat/LuaScriptInterface.cpp
+++ b/src/cat/LuaScriptInterface.cpp
@@ -934,10 +934,10 @@ int LuaScriptInterface::simulation_createParts(lua_State * l)
 	int c = luaL_optint(l,5,luacon_model->GetActiveTool(0)->GetToolID());
 	int brush = luaL_optint(l,6,CIRCLE_BRUSH);
 	//int flags = luaL_optint(l,7,get_brush_flags());
-	if (x < 0 || x > XRES || y < 0 || y > YRES)
+	/*if (x < 0 || x > XRES || y < 0 || y > YRES)
 		return luaL_error(l, "Coordinates out of range (%d,%d)", x, y);
 	if (c < 0 || c >= PT_NUM || !luacon_sim->elements[c].Enabled)
-		return luaL_error(l, "Unrecognised element number '%d'", c);
+		return luaL_error(l, "Unrecognised element number '%d'", c);*/
 
 	vector<Brush*> brushList = luacon_model->GetBrushList();
 	if (brush < 0 || brush > brushList.size())
@@ -962,12 +962,12 @@ int LuaScriptInterface::simulation_createLine(lua_State * l)
 	int c = luaL_optint(l,7,luacon_model->GetActiveTool(0)->GetToolID());
 	int brush = luaL_optint(l,8,CIRCLE_BRUSH);
 	//int flags = luaL_optint(l,9,get_brush_flags());
-	if (x1 < 0 || x1 > XRES || y1 < 0 || y1 > YRES)
+	/* (x1 < 0 || x1 > XRES || y1 < 0 || y1 > YRES)
 		return luaL_error(l, "Starting coordinates out of range (%d,%d)", x1, y1);
 	if (x2 < 0 || x2 > XRES || y2 < 0 || y2 > YRES)
 		return luaL_error(l, "Ending Coordinates out of range (%d,%d)", x2, y2);
 	if (c < 0 || c >= PT_NUM || !luacon_sim->elements[c].Enabled)
-		return luaL_error(l, "Unrecognised element number '%d'", c);
+		return luaL_error(l, "Unrecognised element number '%d'", c);*/
 
 	vector<Brush*> brushList = luacon_model->GetBrushList();
 	if (brush < 0 || brush > brushList.size())
@@ -987,12 +987,12 @@ int LuaScriptInterface::simulation_createBox(lua_State * l)
 	int y2 = luaL_optint(l,4,-1);
 	int c = luaL_optint(l,5,luacon_model->GetActiveTool(0)->GetToolID());
 	//int flags = luaL_optint(l,6,get_brush_flags());
-	if (x1 < 0 || x1 > XRES || y1 < 0 || y1 > YRES)
+	/*if (x1 < 0 || x1 > XRES || y1 < 0 || y1 > YRES)
 		return luaL_error(l, "Starting coordinates out of range (%d,%d)", x1, y1);
 	if (x2 < 0 || x2 > XRES || y2 < 0 || y2 > YRES)
 		return luaL_error(l, "Ending Coordinates out of range (%d,%d)", x2, y2);
 	if (c < 0 || c >= PT_NUM || !luacon_sim->elements[c].Enabled)
-		return luaL_error(l, "Unrecognised element number '%d'", c);
+		return luaL_error(l, "Unrecognised element number '%d'", c);*/
 
 	luacon_sim->CreateBox(x1, y1, x2, y2, c, 0);
 	return 0;
@@ -1006,10 +1006,10 @@ int LuaScriptInterface::simulation_floodParts(lua_State * l)
 	int cm = luaL_optint(l,4,-1);
 	int bm = luaL_optint(l,5,-1);
 	//int flags = luaL_optint(l,6,0);
-	if (x < 0 || x > XRES || y < 0 || y > YRES)
+	/*if (x < 0 || x > XRES || y < 0 || y > YRES)
 		return luaL_error(l, "coordinates out of range (%d,%d)", x, y);
-	if (c < 0 || c >= PT_NUM || !luacon_sim->elements[c].Enabled)
-		return luaL_error(l, "Unrecognised element number '%d'", c);
+	if ((c >= 0 && c < PT_NUM && !luacon_sim->elements[c].Enabled) || c < 0)
+		return luaL_error(l, "Unrecognised element number '%d'", c);*/
 	int ret = luacon_sim->FloodParts(x, y, c, cm, bm, 0);
 	lua_pushinteger(l, ret);
 	return 1;
@@ -1949,24 +1949,22 @@ int LuaScriptInterface::graphics_textSize(lua_State * l)
 
 int LuaScriptInterface::graphics_drawText(lua_State * l)
 {
-	char * text;
-	int x, y, r, g, b, a;
-	x = lua_tointeger(l, 1);
-	y = lua_tointeger(l, 2);
-	text = (char*)lua_tostring(l, 3);
-	r = luaL_optint(l, 4, 255);
-	g = luaL_optint(l, 5, 255);
-	b = luaL_optint(l, 6, 255);
-	a = luaL_optint(l, 7, 255);
+	int x = lua_tointeger(l, 1);
+	int y = lua_tointeger(l, 2);
+	char * text = (char*)lua_tostring(l, 3);
+	int r = luaL_optint(l, 4, 255);
+	int g = luaL_optint(l, 5, 255);
+	int b = luaL_optint(l, 6, 255);
+	int a = luaL_optint(l, 7, 255);
 	
 	if (r<0) r = 0;
-	if (r>255) r = 255;
+	else if (r>255) r = 255;
 	if (g<0) g = 0;
-	if (g>255) g = 255;
+	else if (g>255) g = 255;
 	if (b<0) b = 0;
-	if (b>255) b = 255;
+	else if (b>255) b = 255;
 	if (a<0) a = 0;
-	if (a>255) a = 255;
+	else if (a>255) a = 255;
 
 	luacon_g->drawtext(x, y, text, r, g, b, a);
 	return 0;
@@ -1974,121 +1972,121 @@ int LuaScriptInterface::graphics_drawText(lua_State * l)
 
 int LuaScriptInterface::graphics_drawLine(lua_State * l)
 {
-	int x1, y1, x2, y2, r, g, b, a;
-	x1 = lua_tointeger(l, 1);
-	y1 = lua_tointeger(l, 2);
-	x2 = lua_tointeger(l, 3);
-	y2 = lua_tointeger(l, 4);
-	r = luaL_optint(l, 5, 255);
-	g = luaL_optint(l, 6, 255);
-	b = luaL_optint(l, 7, 255);
-	a = luaL_optint(l, 8, 255);
+	int x1 = lua_tointeger(l, 1);
+	int y1 = lua_tointeger(l, 2);
+	int x2 = lua_tointeger(l, 3);
+	int y2 = lua_tointeger(l, 4);
+	int r = luaL_optint(l, 5, 255);
+	int g = luaL_optint(l, 6, 255);
+	int b = luaL_optint(l, 7, 255);
+	int a = luaL_optint(l, 8, 255);
 
 	if (r<0) r = 0;
-	if (r>255) r = 255;
+	else if (r>255) r = 255;
 	if (g<0) g = 0;
-	if (g>255) g = 255;
+	else if (g>255) g = 255;
 	if (b<0) b = 0;
-	if (b>255) b = 255;
+	else if (b>255) b = 255;
 	if (a<0) a = 0;
-	if (a>255) a = 255;
+	else if (a>255) a = 255;
+
 	luacon_g->draw_line(x1, y1, x2, y2, r, g, b, a);
 	return 0;
 }
 
 int LuaScriptInterface::graphics_drawRect(lua_State * l)
 {
-	int x, y, rx, ry, r, g, b, a;
-	x = lua_tointeger(l, 1);
-	y = lua_tointeger(l, 2);
-	rx = lua_tointeger(l, 3);
-	ry = lua_tointeger(l, 4);
-	r = luaL_optint(l, 5, 255);
-	g = luaL_optint(l, 6, 255);
-	b = luaL_optint(l, 7, 255);
-	a = luaL_optint(l, 8, 255);
+	int x = lua_tointeger(l, 1);
+	int y = lua_tointeger(l, 2);
+	int width = lua_tointeger(l, 3);
+	int height = lua_tointeger(l, 4);
+	int r = luaL_optint(l, 5, 255);
+	int g = luaL_optint(l, 6, 255);
+	int b = luaL_optint(l, 7, 255);
+	int a = luaL_optint(l, 8, 255);
 
 	if (r<0) r = 0;
-	if (r>255) r = 255;
+	else if (r>255) r = 255;
 	if (g<0) g = 0;
-	if (g>255) g = 255;
+	else if (g>255) g = 255;
 	if (b<0) b = 0;
-	if (b>255) b = 255;
+	else if (b>255) b = 255;
 	if (a<0) a = 0;
-	if (a>255) a = 255;
-	luacon_g->drawrect(x, y, rx, ry, r, g, b, a);
+	else if (a>255) a = 255;
+
+	luacon_g->drawrect(x, y, width, height, r, g, b, a);
 	return 0;
 }
 
 int LuaScriptInterface::graphics_fillRect(lua_State * l)
 {
-	int x, y, rx, ry, r, g, b, a;
-	x = lua_tointeger(l, 1);
-	y = lua_tointeger(l, 2);
-	rx = lua_tointeger(l, 3);
-	ry = lua_tointeger(l, 4);
-	r = luaL_optint(l, 5, 255);
-	g = luaL_optint(l, 6, 255);
-	b = luaL_optint(l, 7, 255);
-	a = luaL_optint(l, 8, 255);
+	int x = lua_tointeger(l, 1);
+	int y = lua_tointeger(l, 2);
+	int width = lua_tointeger(l, 3);
+	int height = lua_tointeger(l, 4);
+	int r = luaL_optint(l, 5, 255);
+	int g = luaL_optint(l, 6, 255);
+	int b = luaL_optint(l, 7, 255);
+	int a = luaL_optint(l, 8, 255);
 
 	if (r<0) r = 0;
-	if (r>255) r = 255;
+	else if (r>255) r = 255;
 	if (g<0) g = 0;
-	if (g>255) g = 255;
+	else if (g>255) g = 255;
 	if (b<0) b = 0;
-	if (b>255) b = 255;
+	else if (b>255) b = 255;
 	if (a<0) a = 0;
-	if (a>255) a = 255;
-	luacon_g->fillrect(x, y, rx, ry, r, g, b, a);
+	else if (a>255) a = 255;
+
+	luacon_g->fillrect(x, y, width, height, r, g, b, a);
 	return 0;
 }
 
 int LuaScriptInterface::graphics_drawCircle(lua_State * l)
 {
-	int x, y, w, h, r, g, b, a;
-	x = lua_tointeger(l, 1);
-	y = lua_tointeger(l, 2);
-	w = lua_tointeger(l, 3);
-	h = lua_tointeger(l, 4);
-	r = luaL_optint(l, 5, 255);
-	g = luaL_optint(l, 6, 255);
-	b = luaL_optint(l, 7, 255);
-	a = luaL_optint(l, 8, 255);
+	int x = lua_tointeger(l, 1);
+	int y = lua_tointeger(l, 2);
+	int rx = lua_tointeger(l, 3);
+	int ry = lua_tointeger(l, 4);
+	int r = luaL_optint(l, 5, 255);
+	int g = luaL_optint(l, 6, 255);
+	int b = luaL_optint(l, 7, 255);
+	int a = luaL_optint(l, 8, 255);
 
 	if (r<0) r = 0;
-	if (r>255) r = 255;
+	else if (r>255) r = 255;
 	if (g<0) g = 0;
-	if (g>255) g = 255;
+	else if (g>255) g = 255;
 	if (b<0) b = 0;
-	if (b>255) b = 255;
+	else if (b>255) b = 255;
 	if (a<0) a = 0;
-	if (a>255) a = 255;
-	luacon_g->drawcircle(x, y, w, h, r, g, b, a);
+	else if (a>255) a = 255;
+
+	luacon_g->drawcircle(x, y, abs(rx), abs(ry), r, g, b, a);
 	return 0;
 }
 
 int LuaScriptInterface::graphics_fillCircle(lua_State * l)
 {
-	int x, y, w, h, r, g, b, a;
-	x = lua_tointeger(l, 1);
-	y = lua_tointeger(l, 2);
-	w = lua_tointeger(l, 3);
-	h = lua_tointeger(l, 4);
-	r = luaL_optint(l, 5, 255);
-	g = luaL_optint(l, 6, 255);
-	b = luaL_optint(l, 7, 255);
-	a = luaL_optint(l, 8, 255);
+	int x = lua_tointeger(l, 1);
+	int y = lua_tointeger(l, 2);
+	int rx = lua_tointeger(l, 3);
+	int ry = lua_tointeger(l, 4);
+	int r = luaL_optint(l, 5, 255);
+	int g = luaL_optint(l, 6, 255);
+	int b = luaL_optint(l, 7, 255);
+	int a = luaL_optint(l, 8, 255);
 
 	if (r<0) r = 0;
-	if (r>255) r = 255;
+	else if (r>255) r = 255;
 	if (g<0) g = 0;
-	if (g>255) g = 255;
+	else if (g>255) g = 255;
 	if (b<0) b = 0;
-	if (b>255) b = 255;
+	else if (b>255) b = 255;
 	if (a<0) a = 0;
-	if (a>255) a = 255;
-	luacon_g->fillcircle(x, y, w, h, r, g, b, a);
+	else if (a>255) a = 255;
+
+	luacon_g->fillcircle(x, y, abs(rx), abs(ry), r, g, b, a);
 	return 0;
 }
 
diff --git a/src/graphics/OpenGLDrawMethods.inl b/src/graphics/OpenGLDrawMethods.inl
index 2bba731f4..52d09dac1 100644
--- a/src/graphics/OpenGLDrawMethods.inl
+++ b/src/graphics/OpenGLDrawMethods.inl
@@ -1,4 +1,5 @@
-#include "../data/font.h" 
+#include "../data/font.h"
+#include <math.h>
 
 int PIXELMETHODS_CLASS::drawtext_outline(int x, int y, const char *s, int r, int g, int b, int a)
 {
@@ -317,6 +318,12 @@ void PIXELMETHODS_CLASS::fillrect(int x, int y, int width, int height, int r, in
 void PIXELMETHODS_CLASS::drawcircle(int x, int y, int rx, int ry, int r, int g, int b, int a)
 {
 	int yTop = ry, yBottom, i, j;
+	if (!rx)
+	{
+		for (j = -ry; j <= ry; j++)
+			blendpixel(x, y+j, r, g, b, a);
+		return;
+	}
 	for (i = 0; i <= rx; i++) {
 		yBottom = yTop;
 		while (pow(i-rx,2.0)*pow(ry,2.0) + pow(yTop-ry,2.0)*pow(rx,2.0) <= pow(rx,2.0)*pow(ry,2.0))
@@ -325,14 +332,14 @@ void PIXELMETHODS_CLASS::drawcircle(int x, int y, int rx, int ry, int r, int g,
 			yTop--;
 		for (int j = yBottom; j <= yTop; j++)
 		{
-			blendpixel(x+i, y+j, r, g, b, a);
+			blendpixel(x+i-rx, y+j-ry, r, g, b, a);
 			if (i != rx)
-				blendpixel(x+2*rx-i, y+j, r, g, b, a);
+				blendpixel(x-i+rx, y+j-ry, r, g, b, a);
 			if (j != ry)
 			{
-				blendpixel(x+i, y+2*ry-j, r, g, b, a);
+				blendpixel(x+i-rx, y-j+ry, r, g, b, a);
 				if (i != rx)
-					blendpixel(x+2*rx-i, y+2*ry-j, r, g, b, a);
+					blendpixel(x-i+rx, y-j+ry, r, g, b, a);
 			}
 		}
 	}
@@ -341,6 +348,12 @@ void PIXELMETHODS_CLASS::drawcircle(int x, int y, int rx, int ry, int r, int g,
 void PIXELMETHODS_CLASS::fillcircle(int x, int y, int rx, int ry, int r, int g, int b, int a)
 {
 	int yTop = ry+1, yBottom, i, j;
+	if (!rx)
+	{
+		for (j = -ry; j <= ry; j++)
+			blendpixel(x, y+j, r, g, b, a);
+		return;
+	}
 	for (i = 0; i <= rx; i++)
 	{
 		while (pow(i-rx,2.0)*pow(ry,2.0) + pow(yTop-ry,2.0)*pow(rx,2.0) <= pow(rx,2.0)*pow(ry,2.0))
@@ -348,9 +361,9 @@ void PIXELMETHODS_CLASS::fillcircle(int x, int y, int rx, int ry, int r, int g,
 		yBottom = 2*ry - yTop;
 		for (int j = yBottom+1; j < yTop; j++)
 		{
-			blendpixel(x+i, y+j, r, g, b, a);
+			blendpixel(x+i-rx, y+j-ry, r, g, b, a);
 			if (i != rx)
-				blendpixel(x+2*rx-i, y+j, r, g, b, a);
+				blendpixel(x-i+rx, y+j-ry, r, g, b, a);
 		}
 	}
 }
diff --git a/src/graphics/RasterDrawMethods.inl b/src/graphics/RasterDrawMethods.inl
index c53c0a88f..5ac22cbe3 100644
--- a/src/graphics/RasterDrawMethods.inl
+++ b/src/graphics/RasterDrawMethods.inl
@@ -1,4 +1,5 @@
 #include "font.h"
+#include <math.h>
 
 int PIXELMETHODS_CLASS::drawtext_outline(int x, int y, const char *s, int r, int g, int b, int a)
 {
@@ -359,6 +360,12 @@ void PIXELMETHODS_CLASS::fillrect(int x, int y, int w, int h, int r, int g, int
 void PIXELMETHODS_CLASS::drawcircle(int x, int y, int rx, int ry, int r, int g, int b, int a)
 {
 	int yTop = ry, yBottom, i, j;
+	if (!rx)
+	{
+		for (j = -ry; j <= ry; j++)
+			blendpixel(x, y+j, r, g, b, a);
+		return;
+	}
 	for (i = 0; i <= rx; i++) {
 		yBottom = yTop;
 		while (pow(i-rx,2.0)*pow(ry,2.0) + pow(yTop-ry,2.0)*pow(rx,2.0) <= pow(rx,2.0)*pow(ry,2.0))
@@ -367,14 +374,14 @@ void PIXELMETHODS_CLASS::drawcircle(int x, int y, int rx, int ry, int r, int g,
 			yTop--;
 		for (int j = yBottom; j <= yTop; j++)
 		{
-			blendpixel(x+i, y+j, r, g, b, a);
+			blendpixel(x+i-rx, y+j-ry, r, g, b, a);
 			if (i != rx)
-				blendpixel(x+2*rx-i, y+j, r, g, b, a);
+				blendpixel(x-i+rx, y+j-ry, r, g, b, a);
 			if (j != ry)
 			{
-				blendpixel(x+i, y+2*ry-j, r, g, b, a);
+				blendpixel(x+i-rx, y-j+ry, r, g, b, a);
 				if (i != rx)
-					blendpixel(x+2*rx-i, y+2*ry-j, r, g, b, a);
+					blendpixel(x-i+rx, y-j+ry, r, g, b, a);
 			}
 		}
 	}
@@ -383,6 +390,12 @@ void PIXELMETHODS_CLASS::drawcircle(int x, int y, int rx, int ry, int r, int g,
 void PIXELMETHODS_CLASS::fillcircle(int x, int y, int rx, int ry, int r, int g, int b, int a)
 {
 	int yTop = ry+1, yBottom, i, j;
+	if (!rx)
+	{
+		for (j = -ry; j <= ry; j++)
+			blendpixel(x, y+j, r, g, b, a);
+		return;
+	}
 	for (i = 0; i <= rx; i++)
 	{
 		while (pow(i-rx,2.0)*pow(ry,2.0) + pow(yTop-ry,2.0)*pow(rx,2.0) <= pow(rx,2.0)*pow(ry,2.0))
@@ -390,9 +403,9 @@ void PIXELMETHODS_CLASS::fillcircle(int x, int y, int rx, int ry, int r, int g,
 		yBottom = 2*ry - yTop;
 		for (int j = yBottom+1; j < yTop; j++)
 		{
-			blendpixel(x+i, y+j, r, g, b, a);
+			blendpixel(x+i-rx, y+j-ry, r, g, b, a);
 			if (i != rx)
-				blendpixel(x+2*rx-i, y+j, r, g, b, a);
+				blendpixel(x-i+rx, y+j-ry, r, g, b, a);
 		}
 	}
 }