add 'grounded' support for 'pipe' rotation profile

res/content/base/blocks/torch.json

@@ -13,5 +13,6 @@
     "light-passing": true,
     "shadeless": true,
     "obstacle": false,
+    "grounded": true,
     "rotation": "pipe"
 }

src/logic/BlocksController.cpp

@@ -84,9 +84,12 @@ void BlocksController::updateBlock(int x, int y, int z) {
     if (vox == nullptr)
         return;
     const Block* def = level->content->getIndices()->getBlockDef(vox->id);
-    if (def->grounded && !chunks->isSolidBlock(x, y-1, z)) {
-        breakBlock(nullptr, def, x, y, z);
-        return;
+    if (def->grounded) {
+        const auto& vec = get_ground_direction(def, vox->state.rotation);
+        if (!chunks->isSolidBlock(x+vec.x, y+vec.y, z+vec.z)) {
+            breakBlock(nullptr, def, x, y, z);
+            return;
+        }
     }
     if (def->rt.funcsset.update) {
         scripting::update_block(def, x, y, z);

src/logic/PlayerController.cpp

@@ -404,8 +404,11 @@ void PlayerController::processRightClick(Block* def, Block* target) {
     if (!chunks->checkReplaceability(def, state, coord)) {
         return;
     }
-    if (def->grounded && !chunks->isSolidBlock(coord.x, coord.y-1, coord.z)) {
-        return;
+    if (def->grounded) {
+        const auto& vec = get_ground_direction(def, state.rotation);
+        if (!chunks->isSolidBlock(coord.x+vec.x, coord.y+vec.y, coord.z+vec.z)) {
+            return;
+        }
     }
     if (chosenBlock != vox->id && chosenBlock) {
         onBlockInteraction(coord, def, BlockInteraction::placing);

src/voxels/Block.hpp

@@ -202,4 +202,13 @@ public:
     Block(const Block&) = delete;
 };
 
+inline glm::ivec3 get_ground_direction(const Block* def, int rotation) {
+    const auto& profileName = def->rotations.name;
+    if (profileName == BlockRotProfile::PIPE_NAME) {
+        return -def->rotations.variants[rotation].axisY;
+    } else {
+        return glm::ivec3(0, -1, 0);
+    }
+}
+
 #endif // VOXELS_BLOCK_HPP_