add block.get_textures

res/content/base/scripts/components/drop.lua

@@ -12,7 +12,15 @@ mat4.rotate(rotation, {1, 0, 0}, math.random() * 360, rotation)
 mat4.rotate(rotation, {0, 0, 1}, math.random() * 360, rotation)
 rig:set_matrix(0, rotation)
 local icon = item.icon(dropitem.id)
-rig:set_texture("$0", icon:gsub("block%-previews", "blocks"):gsub("base%:", ""))
+if icon:find("^block%-previews%:") then
+    local bid = block.index(icon:sub(16))
+    local textures = block.get_textures(bid)
+    for i,t in ipairs(textures) do
+        rig:set_texture("$"..tostring(i-1), "blocks:"..textures[i])
+    end
+else
+    rig:set_texture("$0", icon)
+end
 
 function on_grounded(force)
     rig:set_matrix(0, mat4.rotate({0, 1, 0}, math.random()*360))

src/graphics/render/ModelBatch.cpp

@@ -139,6 +139,8 @@ void ModelBatch::setTexture(const std::string& name,
             setTexture(atlas->getTexture());
             if (auto reg = atlas->getIf(name.substr(sep+1))) {
                 region = *reg;
+            } else {
+                setTexture("blocks:notfound", varTextures);
             }
         }
     }

src/logic/scripting/lua/libblock.cpp

@@ -259,6 +259,18 @@ static int l_caption(lua::State* L) {
     return 0;
 }
 
+static int l_get_textures(lua::State* L) {
+    if (auto def = require_block(L)) {
+        lua::createtable(L, 6, 0);
+        for (size_t i = 0; i < 6; i++) {
+            lua::pushstring(L, def->textureFaces[i]);
+            lua::rawseti(L, i+1);
+        }
+        return 1;
+    }
+    return 0;
+}
+
 const luaL_Reg blocklib [] = {
     {"index", lua::wrap<l_index>},
     {"name", lua::wrap<l_name>},
@@ -282,5 +294,6 @@ const luaL_Reg blocklib [] = {
     {"get_size", lua::wrap<l_get_size>},
     {"is_segment", lua::wrap<l_is_segment>},
     {"seek_origin", lua::wrap<l_seek_origin>},
+    {"get_textures", lua::wrap<l_get_textures>},
     {NULL, NULL}
 };