-begin work on unidirectional collision detection

-fixed performance issue in new 2D engine
-texscreen() working in shader 2D

drivers/gles2/rasterizer_gles2.cpp

@@ -5141,6 +5141,7 @@ bool RasterizerGLES2::_setup_material(const Geometry *p_geometry,const Material
 
 		if (p_material->shader_cache->has_texscreen && framebuffer.active) {
 			material_shader.set_uniform(MaterialShaderGLES2::TEXSCREEN_SCREEN_MULT,Vector2(float(viewport.width)/framebuffer.width,float(viewport.height)/framebuffer.height));
+			material_shader.set_uniform(MaterialShaderGLES2::TEXSCREEN_SCREEN_CLAMP,Color(0,0,float(viewport.width)/framebuffer.width,float(viewport.height)/framebuffer.height));
 			material_shader.set_uniform(MaterialShaderGLES2::TEXSCREEN_TEX,texcoord);
 			glActiveTexture(GL_TEXTURE0+texcoord);
 			glBindTexture(GL_TEXTURE_2D,framebuffer.sample_color);
@@ -8387,12 +8388,33 @@ void RasterizerGLES2::canvas_render_items(CanvasItem *p_item_list) {
 
 
 				if (shader->has_texscreen && framebuffer.active) {
+
+					int x = viewport.x;
+					int y = window_size.height-(viewport.height+viewport.y);
+
 					canvas_shader.set_uniform(CanvasShaderGLES2::TEXSCREEN_SCREEN_MULT,Vector2(float(viewport.width)/framebuffer.width,float(viewport.height)/framebuffer.height));
+					canvas_shader.set_uniform(CanvasShaderGLES2::TEXSCREEN_SCREEN_CLAMP,Color(float(x)/framebuffer.width,float(y)/framebuffer.height,float(x+viewport.width)/framebuffer.width,float(y+viewport.height)/framebuffer.height));
 					canvas_shader.set_uniform(CanvasShaderGLES2::TEXSCREEN_TEX,tex_id);
 					glActiveTexture(GL_TEXTURE0+tex_id);
 					glBindTexture(GL_TEXTURE_2D,framebuffer.sample_color);
+					if (framebuffer.scale==1 && !canvas_texscreen_used) {
+#ifdef GLEW_ENABLED
+						glReadBuffer(GL_COLOR_ATTACHMENT0);
+#endif
+						glCopyTexSubImage2D(GL_TEXTURE_2D,0,x,y,x,y,viewport.width,viewport.height);
+						if (current_clip) {
+							print_line(" a clip ");
+						}
+
+						canvas_texscreen_used=true;
+					}
+					tex_id++;
 
 				}
+
+				if (tex_id>1) {
+					glActiveTexture(GL_TEXTURE0);
+				}
 				if (shader->has_screen_uv) {
 					canvas_shader.set_uniform(CanvasShaderGLES2::SCREEN_UV_MULT,Vector2(1.0/viewport.width,1.0/viewport.height));
 				}
@@ -8412,6 +8434,7 @@ void RasterizerGLES2::canvas_render_items(CanvasItem *p_item_list) {
 
 			}
 
+
 			canvas_shader.set_uniform(CanvasShaderGLES2::PROJECTION_MATRIX,canvas_transform);
 			canvas_last_shader=shader_owner->shader;
 		}

drivers/gles2/shader_compiler_gles2.cpp

@@ -404,7 +404,7 @@ String ShaderCompilerGLES2::dump_node_code(SL::Node *p_node,int p_level,bool p_a
 					} else if (callfunc=="texscreen") {
 						//create the call to sample the screen, and clamp it
 						uses_texscreen=true;
-						code="(texture2D( texscreen_tex, min(("+dump_node_code(onode->arguments[1],p_level)+").xy*texscreen_screen_mult,texscreen_screen_mult))).rgb";
+						code="(texture2D( texscreen_tex, clamp(("+dump_node_code(onode->arguments[1],p_level)+").xy*texscreen_screen_mult,texscreen_screen_clamp.xy,texscreen_screen_clamp.zw))).rgb";
 						//code="(texture2D( screen_texture, ("+dump_node_code(onode->arguments[1],p_level)+").xy).rgb";
 						break;
 					} else if (callfunc=="texpos") {

drivers/gles2/shaders/canvas.glsl

@@ -100,6 +100,7 @@ uniform vec2 screen_uv_mult;
 #if defined(ENABLE_TEXSCREEN)
 
 uniform vec2 texscreen_screen_mult;
+uniform vec4 texscreen_screen_clamp;
 uniform sampler2D texscreen_tex;
 
 #endif

drivers/gles2/shaders/material.glsl

@@ -779,6 +779,7 @@ uniform highp mat4 camera_inverse_transform;
 #if defined(ENABLE_TEXSCREEN)
 
 uniform vec2 texscreen_screen_mult;
+uniform vec4 texscreen_screen_clamp;
 uniform sampler2D texscreen_tex;
 
 #endif

scene/2d/node_2d.cpp

@@ -291,13 +291,27 @@ void Node2D::set_global_transform(const Matrix32& p_transform) {
 
 void Node2D::set_z(int p_z) {
 
-	ERR_FAIL_COND(p_z<-VS::CANVAS_ITEM_Z_DEFAULT);
-	ERR_FAIL_COND(p_z>=VS::CANVAS_ITEM_Z_DEFAULT);
+	ERR_FAIL_COND(p_z<VS::CANVAS_ITEM_Z_MIN);
+	ERR_FAIL_COND(p_z>VS::CANVAS_ITEM_Z_MAX);
 	z=p_z;
-	VS::get_singleton()->canvas_item_set_z(get_canvas_item(),z+VS::CANVAS_ITEM_Z_DEFAULT);
+	VS::get_singleton()->canvas_item_set_z(get_canvas_item(),z);
 
 }
 
+void Node2D::set_z_as_relative(bool p_enabled) {
+
+	if (z_relative==p_enabled)
+		return;
+	z_relative=p_enabled;
+	VS::get_singleton()->canvas_item_set_z_as_relative_to_parent(get_canvas_item(),p_enabled);
+}
+
+bool Node2D::is_z_relative() const {
+
+	return z_relative;
+}
+
+
 int Node2D::get_z() const{
 
 	return z;
@@ -332,13 +346,16 @@ void Node2D::_bind_methods() {
 	ObjectTypeDB::bind_method(_MD("set_z","z"),&Node2D::set_z);
 	ObjectTypeDB::bind_method(_MD("get_z"),&Node2D::get_z);
 
+	ObjectTypeDB::bind_method(_MD("set_z_as_relative","enable"),&Node2D::set_z_as_relative);
+	ObjectTypeDB::bind_method(_MD("is_z_relative"),&Node2D::is_z_relative);
+
 	ObjectTypeDB::bind_method(_MD("edit_set_pivot"),&Node2D::edit_set_pivot);
 
 	ADD_PROPERTY(PropertyInfo(Variant::VECTOR2,"transform/pos"),_SCS("set_pos"),_SCS("get_pos"));
 	ADD_PROPERTY(PropertyInfo(Variant::REAL,"transform/rot",PROPERTY_HINT_RANGE,"-1440,1440,0.1"),_SCS("_set_rotd"),_SCS("_get_rotd"));
 	ADD_PROPERTY(PropertyInfo(Variant::VECTOR2,"transform/scale"),_SCS("set_scale"),_SCS("get_scale"));
-	ADD_PROPERTY(PropertyInfo(Variant::INT,"visibility/z",PROPERTY_HINT_RANGE,"-512,511,1"),_SCS("set_z"),_SCS("get_z"));
-
+	ADD_PROPERTY(PropertyInfo(Variant::INT,"z/z",PROPERTY_HINT_RANGE,itos(VS::CANVAS_ITEM_Z_MIN)+","+itos(VS::CANVAS_ITEM_Z_MAX)+",1"),_SCS("set_z"),_SCS("get_z"));
+	ADD_PROPERTY(PropertyInfo(Variant::BOOL,"z/relative"),_SCS("set_z_as_relative"),_SCS("is_z_relative"));
 
 
 }
@@ -351,6 +368,7 @@ Node2D::Node2D() {
 	scale=Vector2(1,1);
 	_xform_dirty=false;
 	z=0;
+	z_relative=true;
 
 }
 

scene/2d/node_2d.h

@@ -39,6 +39,7 @@ class Node2D : public CanvasItem {
 	float angle;
 	Size2 scale;
 	int z;
+	bool z_relative;
 
 	Matrix32 _mat;
 
@@ -89,6 +90,8 @@ public:
 	void set_z(int p_z);
 	int get_z() const;
 
+	void set_z_as_relative(bool p_enabled);
+	bool is_z_relative() const;
 
 	Matrix32 get_transform() const;
 

scene/2d/physics_body_2d.cpp

@@ -43,13 +43,28 @@ void PhysicsBody2D::_notification(int p_what) {
 	*/
 }
 
+void PhysicsBody2D::set_one_way_collision_direction(const Vector2& p_dir) {
+
+	one_way_collision_direction=p_dir;
+	Physics2DServer::get_singleton()->body_set_one_way_collision_direction(get_rid(),p_dir);
+}
+
+Vector2 PhysicsBody2D::get_one_way_collision_direction() const{
+
+	return one_way_collision_direction;
+}
+
+
 void PhysicsBody2D::_bind_methods() {
 
 	ObjectTypeDB::bind_method(_MD("set_layer_mask","mask"),&PhysicsBody2D::set_layer_mask);
 	ObjectTypeDB::bind_method(_MD("get_layer_mask"),&PhysicsBody2D::get_layer_mask);
+	ObjectTypeDB::bind_method(_MD("set_one_way_collision_direction","dir"),&PhysicsBody2D::set_one_way_collision_direction);
+	ObjectTypeDB::bind_method(_MD("get_one_way_collision_direction"),&PhysicsBody2D::get_one_way_collision_direction);
 	ObjectTypeDB::bind_method(_MD("add_collision_exception_with","body:PhysicsBody2D"),&PhysicsBody2D::add_collision_exception_with);
 	ObjectTypeDB::bind_method(_MD("remove_collision_exception_with","body:PhysicsBody2D"),&PhysicsBody2D::remove_collision_exception_with);
 	ADD_PROPERTY(PropertyInfo(Variant::INT,"layers",PROPERTY_HINT_ALL_FLAGS),_SCS("set_layer_mask"),_SCS("get_layer_mask"));
+	ADD_PROPERTY(PropertyInfo(Variant::VECTOR2,"one_way_collision/direction"),_SCS("set_one_way_collision_direction"),_SCS("get_one_way_collision_direction"));
 }
 
 void PhysicsBody2D::set_layer_mask(uint32_t p_mask) {

scene/2d/physics_body_2d.h

@@ -39,6 +39,7 @@ class PhysicsBody2D : public CollisionObject2D {
 	OBJ_TYPE(PhysicsBody2D,CollisionObject2D);
 
 	uint32_t mask;
+	Vector2 one_way_collision_direction;
 protected:
 
 	void _notification(int p_what);
@@ -53,6 +54,9 @@ public:
 	void add_collision_exception_with(Node* p_node); //must be physicsbody
 	void remove_collision_exception_with(Node* p_node);
 
+	void set_one_way_collision_direction(const Vector2& p_dir);
+	Vector2 get_one_way_collision_direction() const;
+
 	PhysicsBody2D();
 
 };

scene/3d/physics_body.cpp

@@ -92,6 +92,7 @@ void PhysicsBody::remove_collision_exception_with(Node* p_node) {
 	PhysicsServer::get_singleton()->body_remove_collision_exception(get_rid(),physics_body->get_rid());
 }
 
+
 void PhysicsBody::_bind_methods() {
 	ObjectTypeDB::bind_method(_MD("set_layer_mask","mask"),&PhysicsBody::set_layer_mask);
 	ObjectTypeDB::bind_method(_MD("get_layer_mask"),&PhysicsBody::get_layer_mask);

scene/3d/physics_body.h

@@ -56,6 +56,8 @@ public:
 	void add_collision_exception_with(Node* p_node); //must be physicsbody
 	void remove_collision_exception_with(Node* p_node);
 
+
+
 	PhysicsBody();
 
 };

servers/physics_2d/body_2d_sw.h

@@ -67,6 +67,8 @@ class Body2DSW : public CollisionObject2DSW {
 	Vector2 applied_force;
 	real_t applied_torque;
 
+	Vector2 one_way_collision_direction;
+
 
 	SelfList<Body2DSW> active_list;
 	SelfList<Body2DSW> inertia_update_list;
@@ -216,6 +218,9 @@ public:
 	_FORCE_INLINE_ void set_continuous_collision_detection_mode(Physics2DServer::CCDMode p_mode) { continuous_cd_mode=p_mode; }
 	_FORCE_INLINE_ Physics2DServer::CCDMode get_continuous_collision_detection_mode() const { return continuous_cd_mode; }
 
+	void set_one_way_collision_direction(const Vector2& p_dir) { one_way_collision_direction=p_dir; }
+	Vector2 get_one_way_collision_direction() const { return one_way_collision_direction; }
+
 	void set_space(Space2DSW *p_space);
 
 	void update_inertias();

servers/physics_2d/physics_2d_server_sw.cpp

@@ -860,6 +860,22 @@ int Physics2DServerSW::body_get_max_contacts_reported(RID p_body) const {
 	return body->get_max_contacts_reported();
 }
 
+void Physics2DServerSW::body_set_one_way_collision_direction(RID p_body,const Vector2& p_direction) {
+
+	Body2DSW *body = body_owner.get(p_body);
+	ERR_FAIL_COND(!body);
+	body->set_one_way_collision_direction(p_direction);
+}
+
+Vector2 Physics2DServerSW::body_get_one_way_collision_direction(RID p_body) const{
+
+	Body2DSW *body = body_owner.get(p_body);
+	ERR_FAIL_COND_V(!body,Vector2());
+	return body->get_one_way_collision_direction();
+
+}
+
+
 void Physics2DServerSW::body_set_force_integration_callback(RID p_body,Object *p_receiver,const StringName& p_method,const Variant& p_udata) {
 
 

servers/physics_2d/physics_2d_server_sw.h

@@ -205,6 +205,9 @@ public:
 	virtual void body_set_max_contacts_reported(RID p_body, int p_contacts);
 	virtual int body_get_max_contacts_reported(RID p_body) const;
 
+	virtual void body_set_one_way_collision_direction(RID p_body,const Vector2& p_direction);
+	virtual Vector2 body_get_one_way_collision_direction(RID p_body) const;
+
 	virtual void body_set_force_integration_callback(RID p_body,Object *p_receiver,const StringName& p_method,const Variant& p_udata=Variant());
 	virtual bool body_collide_shape(RID p_body, int p_body_shape,RID p_shape, const Matrix32& p_shape_xform,const Vector2& p_motion,Vector2 *r_results,int p_result_max,int &r_result_count);
 

servers/physics_2d_server.cpp

@@ -500,6 +500,10 @@ void Physics2DServer::_bind_methods() {
 	ObjectTypeDB::bind_method(_MD("body_set_max_contacts_reported","body","amount"),&Physics2DServer::body_set_max_contacts_reported);
 	ObjectTypeDB::bind_method(_MD("body_get_max_contacts_reported","body"),&Physics2DServer::body_get_max_contacts_reported);
 
+	ObjectTypeDB::bind_method(_MD("body_set_one_way_collision_direction","normal"),&Physics2DServer::body_set_one_way_collision_direction);
+	ObjectTypeDB::bind_method(_MD("body_get_one_way_collision_direction"),&Physics2DServer::body_get_one_way_collision_direction);
+
+
 	ObjectTypeDB::bind_method(_MD("body_set_omit_force_integration","body","enable"),&Physics2DServer::body_set_omit_force_integration);
 	ObjectTypeDB::bind_method(_MD("body_is_omitting_force_integration","body"),&Physics2DServer::body_is_omitting_force_integration);
 

servers/physics_2d_server.h

@@ -442,6 +442,9 @@ public:
 	virtual void body_set_max_contacts_reported(RID p_body, int p_contacts)=0;
 	virtual int body_get_max_contacts_reported(RID p_body) const=0;
 
+	virtual void body_set_one_way_collision_direction(RID p_body,const Vector2& p_direction)=0;
+	virtual Vector2 body_get_one_way_collision_direction(RID p_body) const=0;
+
 	//missing remove
 	virtual void body_set_contacts_reported_depth_treshold(RID p_body, float p_treshold)=0;
 	virtual float body_get_contacts_reported_depth_treshold(RID p_body) const=0;

servers/visual/visual_server_raster.cpp

@@ -3691,7 +3691,7 @@ void VisualServerRaster::canvas_item_add_set_blend_mode(RID p_item, MaterialBlen
 
 void VisualServerRaster::canvas_item_set_z(RID p_item, int p_z) {
 
-	ERR_FAIL_COND(p_z<0 || p_z>=CANVAS_ITEM_Z_MAX);
+	ERR_FAIL_COND(p_z<CANVAS_ITEM_Z_MIN || p_z>CANVAS_ITEM_Z_MAX);
 	VS_CHANGED;
 	CanvasItem *canvas_item = canvas_item_owner.get( p_item );
 	ERR_FAIL_COND(!canvas_item);
@@ -3699,6 +3699,15 @@ void VisualServerRaster::canvas_item_set_z(RID p_item, int p_z) {
 
 }
 
+void VisualServerRaster::canvas_item_set_z_as_relative_to_parent(RID p_item, bool p_enable) {
+
+	VS_CHANGED;
+	CanvasItem *canvas_item = canvas_item_owner.get( p_item );
+	ERR_FAIL_COND(!canvas_item);
+	canvas_item->z_relative=p_enable;
+
+}
+
 void VisualServerRaster::canvas_item_set_use_parent_shader(RID p_item, bool p_enable) {
 
 	VS_CHANGED;
@@ -6139,18 +6148,20 @@ void VisualServerRaster::_render_camera(Viewport *p_viewport,Camera *p_camera, S
 
 void VisualServerRaster::_render_canvas_item_tree(CanvasItem *p_canvas_item,const Matrix32& p_transform,const Rect2& p_clip_rect) {
 
-	Rasterizer::CanvasItem *z_list[CANVAS_ITEM_Z_MAX];
-	Rasterizer::CanvasItem *z_last_list[CANVAS_ITEM_Z_MAX];
 
-	for(int i=0;i<CANVAS_ITEM_Z_MAX;i++) {
+	static const int z_range = CANVAS_ITEM_Z_MAX-CANVAS_ITEM_Z_MIN+1;
+	Rasterizer::CanvasItem *z_list[z_range];
+	Rasterizer::CanvasItem *z_last_list[z_range];
+
+	for(int i=0;i<z_range;i++) {
 		z_list[i]=NULL;
 		z_last_list[i]=NULL;
 	}
 
 
-	_render_canvas_item(p_canvas_item,p_transform,p_clip_rect,1.0,z_list,z_last_list,NULL,NULL);
+	_render_canvas_item(p_canvas_item,p_transform,p_clip_rect,1.0,0,z_list,z_last_list,NULL,NULL);
 
-	for(int i=0;i<CANVAS_ITEM_Z_MAX;i++) {
+	for(int i=0;i<z_range;i++) {
 		if (!z_list[i])
 			continue;
 		rasterizer->canvas_render_items(z_list[i]);
@@ -6168,7 +6179,7 @@ void VisualServerRaster::_render_canvas_item_viewport(VisualServer* p_self,void
 
 }
 
-void VisualServerRaster::_render_canvas_item(CanvasItem *p_canvas_item,const Matrix32& p_transform,const Rect2& p_clip_rect, float p_opacity,Rasterizer::CanvasItem **z_list,Rasterizer::CanvasItem **z_last_list,CanvasItem *p_canvas_clip,CanvasItem *p_shader_owner) {
+void VisualServerRaster::_render_canvas_item(CanvasItem *p_canvas_item,const Matrix32& p_transform,const Rect2& p_clip_rect, float p_opacity,int p_z,Rasterizer::CanvasItem **z_list,Rasterizer::CanvasItem **z_last_list,CanvasItem *p_canvas_clip,CanvasItem *p_shader_owner) {
 
 	CanvasItem *ci = p_canvas_item;
 
@@ -6247,7 +6258,7 @@ void VisualServerRaster::_render_canvas_item(CanvasItem *p_canvas_item,const Mat
 
 		if (child_items[i]->ontop)
 			continue;
-		_render_canvas_item(child_items[i],xform,p_clip_rect,opacity,z_list,z_last_list,(CanvasItem*)ci->final_clip_owner,p_shader_owner);
+		_render_canvas_item(child_items[i],xform,p_clip_rect,opacity,p_z,z_list,z_last_list,(CanvasItem*)ci->final_clip_owner,p_shader_owner);
 	}
 
 
@@ -6256,13 +6267,20 @@ void VisualServerRaster::_render_canvas_item(CanvasItem *p_canvas_item,const Mat
 		ci->final_transform=xform;
 		ci->final_opacity=opacity * ci->self_opacity;
 
-		if (z_last_list[ci->z]) {
-			z_last_list[ci->z]->next=ci;
-			z_last_list[ci->z]=ci;
+		if (ci->z_relative)
+			p_z=CLAMP(p_z+ci->z,CANVAS_ITEM_Z_MIN,CANVAS_ITEM_Z_MAX);
+		else
+			p_z=ci->z;
+
+		int zidx = p_z-CANVAS_ITEM_Z_MIN;
+
+		if (z_last_list[zidx]) {
+			z_last_list[zidx]->next=ci;
+			z_last_list[zidx]=ci;
 
 		} else {
-			z_list[ci->z]=ci;
-			z_last_list[ci->z]=ci;
+			z_list[zidx]=ci;
+			z_last_list[zidx]=ci;
 		}
 
 		ci->next=NULL;
@@ -6273,7 +6291,7 @@ void VisualServerRaster::_render_canvas_item(CanvasItem *p_canvas_item,const Mat
 
 		if (!child_items[i]->ontop)
 			continue;
-		_render_canvas_item(child_items[i],xform,p_clip_rect,opacity,z_list,z_last_list,(CanvasItem*)ci->final_clip_owner,p_shader_owner);
+		_render_canvas_item(child_items[i],xform,p_clip_rect,opacity,p_z,z_list,z_last_list,(CanvasItem*)ci->final_clip_owner,p_shader_owner);
 	}
 
 }
@@ -6282,31 +6300,62 @@ void VisualServerRaster::_render_canvas(Canvas *p_canvas,const Matrix32 &p_trans
 
 	rasterizer->canvas_begin();
 
-
 	int l = p_canvas->child_items.size();
+	Canvas::ChildItem *ci=p_canvas->child_items.ptr();
 
+	bool has_mirror=false;
 	for(int i=0;i<l;i++) {
+		if (ci[i].mirror.x || ci[i].mirror.y) {
+			has_mirror=true;
+			break;
+		}
+	}
 
-		Canvas::ChildItem& ci=p_canvas->child_items[i];
-		_render_canvas_item_tree(ci.item,p_transform,Rect2(viewport_rect.x,viewport_rect.y,viewport_rect.width,viewport_rect.height));
+	Rect2 clip_rect(viewport_rect.x,viewport_rect.y,viewport_rect.width,viewport_rect.height);
+	if (!has_mirror) {
 
-		//mirroring (useful for scrolling backgrounds)
-		if (ci.mirror.x!=0) {
+		static const int z_range = CANVAS_ITEM_Z_MAX-CANVAS_ITEM_Z_MIN+1;
+		Rasterizer::CanvasItem *z_list[z_range];
+		Rasterizer::CanvasItem *z_last_list[z_range];
 
-			Matrix32 xform2 = p_transform * Matrix32(0,Vector2(ci.mirror.x,0));
-			_render_canvas_item_tree(ci.item,xform2,Rect2(viewport_rect.x,viewport_rect.y,viewport_rect.width,viewport_rect.height));
+		for(int i=0;i<z_range;i++) {
+			z_list[i]=NULL;
+			z_last_list[i]=NULL;
 		}
-		if (ci.mirror.y!=0) {
-
-			Matrix32 xform2 = p_transform * Matrix32(0,Vector2(0,ci.mirror.y));
-			_render_canvas_item_tree(ci.item,xform2,Rect2(viewport_rect.x,viewport_rect.y,viewport_rect.width,viewport_rect.height));
+		for(int i=0;i<l;i++) {
+			_render_canvas_item(ci[i].item,p_transform,clip_rect,1.0,0,z_list,z_last_list,NULL,NULL);
 		}
-		if (ci.mirror.y!=0 && ci.mirror.x!=0) {
 
-			Matrix32 xform2 = p_transform * Matrix32(0,ci.mirror);
-			_render_canvas_item_tree(ci.item,xform2,Rect2(viewport_rect.x,viewport_rect.y,viewport_rect.width,viewport_rect.height));
+		for(int i=0;i<z_range;i++) {
+			if (!z_list[i])
+				continue;
+			rasterizer->canvas_render_items(z_list[i]);
 		}
+	} else {
+
+		for(int i=0;i<l;i++) {
+
+			Canvas::ChildItem& ci=p_canvas->child_items[i];
+			_render_canvas_item_tree(ci.item,p_transform,clip_rect);
+
+			//mirroring (useful for scrolling backgrounds)
+			if (ci.mirror.x!=0) {
 
+				Matrix32 xform2 = p_transform * Matrix32(0,Vector2(ci.mirror.x,0));
+				_render_canvas_item_tree(ci.item,xform2,clip_rect);
+			}
+			if (ci.mirror.y!=0) {
+
+				Matrix32 xform2 = p_transform * Matrix32(0,Vector2(0,ci.mirror.y));
+				_render_canvas_item_tree(ci.item,xform2,clip_rect);
+			}
+			if (ci.mirror.y!=0 && ci.mirror.x!=0) {
+
+				Matrix32 xform2 = p_transform * Matrix32(0,ci.mirror);
+				_render_canvas_item_tree(ci.item,xform2,clip_rect);
+			}
+
+		}
 	}
 
 }

servers/visual/visual_server_raster.h

@@ -380,6 +380,7 @@ class VisualServerRaster : public VisualServer {
 		List<CanvasItem*>::Element *E;
 		RID viewport;
 		int z;
+		bool z_relative;
 		bool sort_y;
 		float opacity;
 		float self_opacity;
@@ -396,6 +397,7 @@ class VisualServerRaster : public VisualServer {
 			self_opacity=1;
 			sort_y=false;
 			use_parent_shader=false;
+			z_relative=true;
 		}
 	};
 
@@ -600,7 +602,7 @@ class VisualServerRaster : public VisualServer {
 	void _render_camera(Viewport *p_viewport,Camera *p_camera, Scenario *p_scenario);
 	static void _render_canvas_item_viewport(VisualServer* p_self,void *p_vp,const Rect2& p_rect);
 	void _render_canvas_item_tree(CanvasItem *p_canvas_item,const Matrix32& p_transform,const Rect2& p_clip_rect);
-	void _render_canvas_item(CanvasItem *p_canvas_item,const Matrix32& p_transform,const Rect2& p_clip_rect,float p_opacity,Rasterizer::CanvasItem **z_list,Rasterizer::CanvasItem **z_last_list,CanvasItem *p_canvas_clip,CanvasItem *p_shader_owner);
+	void _render_canvas_item(CanvasItem *p_canvas_item,const Matrix32& p_transform,const Rect2& p_clip_rect, float p_opacity,int p_z,Rasterizer::CanvasItem **z_list,Rasterizer::CanvasItem **z_last_list,CanvasItem *p_canvas_clip,CanvasItem *p_shader_owner);
 	void _render_canvas(Canvas *p_canvas,const Matrix32 &p_transform);
 	Vector<Vector3> _camera_generate_endpoints(Instance *p_light,Camera *p_camera,float p_range_min, float p_range_max);
 	Vector<Plane> _camera_generate_orthogonal_planes(Instance *p_light,Camera *p_camera,float p_range_min, float p_range_max);
@@ -1112,6 +1114,7 @@ public:
 	virtual void canvas_item_add_clip_ignore(RID p_item, bool p_ignore);
 	virtual void canvas_item_set_sort_children_by_y(RID p_item, bool p_enable);
 	virtual void canvas_item_set_z(RID p_item, int p_z);
+	virtual void canvas_item_set_z_as_relative_to_parent(RID p_item, bool p_enable);
 
 	virtual void canvas_item_set_shader(RID p_item, RID p_shader);
 	virtual RID canvas_item_get_shader(RID p_item) const;

servers/visual/visual_server_wrap_mt.h

@@ -1132,6 +1132,7 @@ public:
 
 	FUNC2(canvas_item_set_sort_children_by_y,RID,bool);
 	FUNC2(canvas_item_set_z,RID,int);
+	FUNC2(canvas_item_set_z_as_relative_to_parent,RID,bool);
 
 	FUNC2(canvas_item_set_shader,RID, RID );
 	FUNC1RC(RID,canvas_item_get_shader,RID );

servers/visual_server.h

@@ -86,8 +86,9 @@ public:
 		ARRAY_WEIGHTS_SIZE=4,
 		MAX_PARTICLE_COLOR_PHASES=4,
 		MAX_PARTICLE_ATTRACTORS=4,
-		CANVAS_ITEM_Z_MAX=1024,
-		CANVAS_ITEM_Z_DEFAULT=512,
+		CANVAS_ITEM_Z_MIN=-4096,
+		CANVAS_ITEM_Z_MAX=4096,
+
 
 
 		MAX_CURSORS = 8,
@@ -985,6 +986,7 @@ public:
 	virtual void canvas_item_add_clip_ignore(RID p_item, bool p_ignore)=0;
 	virtual void canvas_item_set_sort_children_by_y(RID p_item, bool p_enable)=0;
 	virtual void canvas_item_set_z(RID p_item, int p_z)=0;
+	virtual void canvas_item_set_z_as_relative_to_parent(RID p_item, bool p_enable)=0;
 
 	virtual void canvas_item_clear(RID p_item)=0;
 	virtual void canvas_item_raise(RID p_item)=0;