allows to put non-square blocks next to yourself

src/logic/PlayerController.cpp

@@ -415,7 +415,7 @@ void PlayerController::updateInteraction(){
             vox = chunks->get(x, y, z);
             blockid_t chosenBlock = def->rt.id;
             if (vox && (target = indices->getBlockDef(vox->id))->replaceable) {
-                if (!level->physics->isBlockInside(x,y,z, player->hitbox.get()) 
+                if (!level->physics->isBlockInside(x,y,z,def,states, player->hitbox.get()) 
                     || !def->obstacle){
                     if (def->grounded && !chunks->isSolidBlock(x, y-1, z)) {
                         chosenBlock = 0;

src/physics/PhysicsSolver.cpp

@@ -4,6 +4,7 @@
 #include "../maths/aabb.h"
 #include "../voxels/Block.h"
 #include "../voxels/Chunks.h"
+#include "../voxels/voxel.h"
 
 const double E = 0.03;
 const double MAX_FIX = 0.1;
@@ -218,3 +219,22 @@ bool PhysicsSolver::isBlockInside(int x, int y, int z, Hitbox* hitbox) {
 			y >= floor(pos.y-half.y) && y <= floor(pos.y+half.y);
 }
 
+bool PhysicsSolver::isBlockInside(int x, int y, int z, Block* def, blockstate_t states, Hitbox* hitbox) {
+	vec3& pos = hitbox->position;
+	vec3& half = hitbox->halfsize;
+  voxel v;
+  v.states = states;
+  const auto& boxes = def->rotatable 
+                    ? def->rt.hitboxes[v.rotation()] 
+                    : def->hitboxes;
+  for (const auto& block_hitbox : boxes) {
+      vec3 min = block_hitbox.min();
+      vec3 max = block_hitbox.max();
+      // 0.00001 - inaccuracy
+      if (min.x < pos.x+half.x-x-0.00001 && max.x > pos.x-half.x-x+0.00001 &&
+          min.z < pos.z+half.z-z-0.00001 && max.z > pos.z-half.z-z+0.00001 &&
+          min.y < pos.y+half.y-y-0.00001 && max.y > pos.y-half.y-y+0.00001)
+          return true;
+  }
+	return false;
+}

src/physics/PhysicsSolver.h

@@ -3,6 +3,7 @@
 
 #include <glm/glm.hpp>
 #include "../typedefs.h"
+#include "../voxels/Block.h"
 
 class Hitbox;
 class Chunks;
@@ -26,6 +27,7 @@ public:
             const glm::vec3 half,
             float stepHeight);
     bool isBlockInside(int x, int y, int z, Hitbox* hitbox);
+    bool isBlockInside(int x, int y, int z, Block* def, blockstate_t states, Hitbox* hitbox);
 };
 
 #endif /* PHYSICS_PHYSICSSOLVER_H_ */