Add normal map to tilemaps and tilesets

Fixes #9310

editor/plugins/tile_set_editor_plugin.cpp

@@ -53,6 +53,7 @@ void TileSetEditor::_import_node(Node *p_node, Ref<TileSet> p_library) {
 
 		Sprite *mi = child->cast_to<Sprite>();
 		Ref<Texture> texture = mi->get_texture();
+		Ref<Texture> normal_map = mi->get_normal_map();
 		Ref<ShaderMaterial> material = mi->get_material();
 
 		if (texture.is_null())
@@ -67,6 +68,7 @@ void TileSetEditor::_import_node(Node *p_node, Ref<TileSet> p_library) {
 		}
 
 		p_library->tile_set_texture(id, texture);
+		p_library->tile_set_normal_map(id, normal_map);
 		p_library->tile_set_material(id, material);
 
 		p_library->tile_set_modulate(id, mi->get_modulate());

scene/2d/tile_map.cpp

@@ -441,14 +441,15 @@ void TileMap::_update_dirty_quadrants() {
 					rect.position.y -= center.y;
 			}
 
+			Ref<Texture> normal_map = tile_set->tile_get_normal_map(c.id);
 			Color modulate = tile_set->tile_get_modulate(c.id);
 			Color self_modulate = get_self_modulate();
 			modulate = Color(modulate.r * self_modulate.r, modulate.g * self_modulate.g,
 					modulate.b * self_modulate.b, modulate.a * self_modulate.a);
 			if (r == Rect2()) {
-				tex->draw_rect(canvas_item, rect, false, modulate, c.transpose);
+				tex->draw_rect(canvas_item, rect, false, modulate, c.transpose, normal_map);
 			} else {
-				tex->draw_rect_region(canvas_item, rect, r, modulate, c.transpose);
+				tex->draw_rect_region(canvas_item, rect, r, modulate, c.transpose, normal_map);
 			}
 
 			Vector<Ref<Shape2D> > shapes = tile_set->tile_get_shapes(c.id);

scene/resources/tile_set.cpp

@@ -45,6 +45,8 @@ bool TileSet::_set(const StringName &p_name, const Variant &p_value) {
 		tile_set_name(id, p_value);
 	else if (what == "texture")
 		tile_set_texture(id, p_value);
+	else if (what == "normal_map")
+		tile_set_normal_map(id, p_value);
 	else if (what == "tex_offset")
 		tile_set_texture_offset(id, p_value);
 	else if (what == "material")
@@ -89,6 +91,8 @@ bool TileSet::_get(const StringName &p_name, Variant &r_ret) const {
 		r_ret = tile_get_name(id);
 	else if (what == "texture")
 		r_ret = tile_get_texture(id);
+	else if (what == "normal_map")
+		r_ret = tile_get_normal_map(id);
 	else if (what == "tex_offset")
 		r_ret = tile_get_texture_offset(id);
 	else if (what == "material")
@@ -125,6 +129,7 @@ void TileSet::_get_property_list(List<PropertyInfo> *p_list) const {
 		String pre = itos(id) + "/";
 		p_list->push_back(PropertyInfo(Variant::STRING, pre + "name"));
 		p_list->push_back(PropertyInfo(Variant::OBJECT, pre + "texture", PROPERTY_HINT_RESOURCE_TYPE, "Texture"));
+		p_list->push_back(PropertyInfo(Variant::OBJECT, pre + "normal_map", PROPERTY_HINT_RESOURCE_TYPE, "Texture"));
 		p_list->push_back(PropertyInfo(Variant::VECTOR2, pre + "tex_offset"));
 		p_list->push_back(PropertyInfo(Variant::OBJECT, pre + "material", PROPERTY_HINT_RESOURCE_TYPE, "ShaderMaterial"));
 		p_list->push_back(PropertyInfo(Variant::COLOR, pre + "modulate"));
@@ -160,6 +165,19 @@ Ref<Texture> TileSet::tile_get_texture(int p_id) const {
 	return tile_map[p_id].texture;
 }
 
+void TileSet::tile_set_normal_map(int p_id, const Ref<Texture> &p_normal_map) {
+
+	ERR_FAIL_COND(!tile_map.has(p_id));
+	tile_map[p_id].normal_map = p_normal_map;
+	emit_changed();
+}
+
+Ref<Texture> TileSet::tile_get_normal_map(int p_id) const {
+
+	ERR_FAIL_COND_V(!tile_map.has(p_id), Ref<Texture>());
+	return tile_map[p_id].normal_map;
+}
+
 void TileSet::tile_set_material(int p_id, const Ref<ShaderMaterial> &p_material) {
 
 	ERR_FAIL_COND(!tile_map.has(p_id));
@@ -404,6 +422,8 @@ void TileSet::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("tile_get_name", "id"), &TileSet::tile_get_name);
 	ClassDB::bind_method(D_METHOD("tile_set_texture", "id", "texture:Texture"), &TileSet::tile_set_texture);
 	ClassDB::bind_method(D_METHOD("tile_get_texture:Texture", "id"), &TileSet::tile_get_texture);
+	ClassDB::bind_method(D_METHOD("tile_set_normal_map", "id", "normal_map:Texture"), &TileSet::tile_set_normal_map);
+	ClassDB::bind_method(D_METHOD("tile_get_normal_map:Texture", "id"), &TileSet::tile_get_normal_map);
 	ClassDB::bind_method(D_METHOD("tile_set_material", "id", "material:ShaderMaterial"), &TileSet::tile_set_material);
 	ClassDB::bind_method(D_METHOD("tile_get_material:ShaderMaterial", "id"), &TileSet::tile_get_material);
 	ClassDB::bind_method(D_METHOD("tile_set_texture_offset", "id", "texture_offset"), &TileSet::tile_set_texture_offset);

scene/resources/tile_set.h

@@ -44,6 +44,7 @@ class TileSet : public Resource {
 
 		String name;
 		Ref<Texture> texture;
+		Ref<Texture> normal_map;
 		Vector2 offset;
 		Vector2 shape_offset;
 		Rect2i region;
@@ -81,6 +82,9 @@ public:
 	void tile_set_texture(int p_id, const Ref<Texture> &p_texture);
 	Ref<Texture> tile_get_texture(int p_id) const;
 
+	void tile_set_normal_map(int p_id, const Ref<Texture> &p_normal_map);
+	Ref<Texture> tile_get_normal_map(int p_id) const;
+
 	void tile_set_texture_offset(int p_id, const Vector2 &p_offset);
 	Vector2 tile_get_texture_offset(int p_id) const;