implement BlockState::outline_shape

azalea-physics/src/clip.rs

@@ -1,4 +1,4 @@
-use azalea_block::BlockState;
+use azalea_block::{BlockState, FluidState};
 use azalea_core::{
     block_hit_result::BlockHitResult,
     direction::Direction,
@@ -9,7 +9,7 @@ use azalea_inventory::ItemStack;
 use azalea_world::ChunkStorage;
 use bevy_ecs::entity::Entity;
 
-use crate::collision::{BlockWithShape, VoxelShape};
+use crate::collision::{BlockWithShape, VoxelShape, EMPTY_SHAPE};
 
 #[derive(Debug, Clone)]
 pub struct ClipContext {
@@ -22,22 +22,37 @@ pub struct ClipContext {
 impl ClipContext {
     // minecraft passes in the world and blockpos here... but it doesn't actually
     // seem necessary?
+
+    /// Get the shape of given block, using the type of shape set in
+    /// [`Self::block_shape_type`].
     pub fn block_shape(&self, block_state: BlockState) -> &VoxelShape {
-        // TODO: implement the other shape getters
-        // (see the ClipContext.Block class in the vanilla source)
         match self.block_shape_type {
-            BlockShapeType::Collider => block_state.shape(),
-            BlockShapeType::Outline => block_state.shape(),
-            BlockShapeType::Visual => block_state.shape(),
-            BlockShapeType::FallDamageResetting => block_state.shape(),
+            BlockShapeType::Collider => block_state.collision_shape(),
+            BlockShapeType::Outline => block_state.outline_shape(),
+            BlockShapeType::Visual => block_state.collision_shape(),
+            BlockShapeType::FallDamageResetting => {
+                if azalea_registry::tags::blocks::FALL_DAMAGE_RESETTING
+                    .contains(&azalea_registry::Block::from(block_state))
+                {
+                    block_state.collision_shape()
+                } else {
+                    &EMPTY_SHAPE
+                }
+            }
         }
     }
 }
 
 #[derive(Debug, Copy, Clone)]
 pub enum BlockShapeType {
+    /// The shape that's used for collision.
     Collider,
+    /// The block outline that renders when your cursor is over a block.
     Outline,
+    /// Used by entities when considering their line of sight.
+    ///
+    /// TODO: visual block shape isn't implemented (it'll just return the
+    /// collider shape), that's correct for most blocks though
     Visual,
     FallDamageResetting,
 }
@@ -64,8 +79,11 @@ pub fn clip(chunk_storage: &ChunkStorage, context: ClipContext) -> BlockHitResul
         context,
         |ctx, block_pos| {
             let block_state = chunk_storage.get_block_state(block_pos).unwrap_or_default();
+            let fluid_state = FluidState::from(block_state);
+
             // TODO: add fluid stuff to this (see getFluidState in vanilla source)
             let block_shape = ctx.block_shape(block_state);
+
             clip_with_interaction_override(&ctx.from, &ctx.to, block_pos, block_shape, &block_state)
             // let block_distance = if let Some(block_hit_result) =
             // block_hit_result {     context.from.distance_squared_to(&
@@ -94,10 +112,9 @@ fn clip_with_interaction_override(
     let block_hit_result = block_shape.clip(from, to, block_pos);
     if let Some(block_hit_result) = block_hit_result {
         // TODO: minecraft calls .getInteractionShape here
-        // some blocks (like tall grass) have a physics shape that's different from the
-        // interaction shape, so we need to implement BlockState::interaction_shape. lol
-        // have fun
-        let interaction_shape = block_state.shape();
+        // getInteractionShape is empty for almost every shape except cauldons,
+        // compostors, hoppers, and scaffolding.
+        let interaction_shape = &*EMPTY_SHAPE;
         let interaction_hit_result = interaction_shape.clip(from, to, block_pos);
         if let Some(interaction_hit_result) = interaction_hit_result {
             if interaction_hit_result.location.distance_squared_to(from)

azalea-physics/src/collision/world_collisions.rs

@@ -47,7 +47,7 @@ pub fn get_block_collisions(world: &Instance, aabb: AABB) -> Vec<VoxelShape> {
         // suffocating
 
         // if it's a full block do a faster collision check
-        if block_state.is_shape_full() {
+        if block_state.is_collision_shape_full() {
             if !state.aabb.intersects_aabb(&AABB {
                 min_x: item.pos.x as f64,
                 min_y: item.pos.y as f64,
@@ -186,7 +186,7 @@ impl<'a> BlockCollisionsState<'a> {
             }
         }
 
-        let shape = block_state.shape();
+        let shape = block_state.collision_shape();
         self.cached_block_shapes.push((block_state, shape));
 
         shape

azalea-world/src/chunk_storage.rs

@@ -7,7 +7,7 @@ use std::{
     sync::{Arc, Weak},
 };
 
-use azalea_block::{BlockState, BlockStateIntegerRepr};
+use azalea_block::{BlockState, BlockStateIntegerRepr, FluidState};
 use azalea_buf::{AzaleaRead, AzaleaWrite, BufReadError};
 use azalea_core::position::{BlockPos, ChunkBlockPos, ChunkPos, ChunkSectionBlockPos};
 use nohash_hasher::IntMap;
@@ -302,6 +302,11 @@ impl ChunkStorage {
         chunk.get(&ChunkBlockPos::from(pos), self.min_y)
     }
 
+    pub fn get_fluid_state(&self, pos: &BlockPos) -> Option<FluidState> {
+        let block_state = self.get_block_state(pos)?;
+        Some(FluidState::from(block_state))
+    }
+
     pub fn set_block_state(&self, pos: &BlockPos, state: BlockState) -> Option<BlockState> {
         if pos.y < self.min_y || pos.y >= (self.min_y + self.height as i32) {
             return None;

azalea/src/pathfinder/world.rs

@@ -485,7 +485,7 @@ pub fn is_block_state_passable(block: BlockState) -> bool {
         // fast path
         return true;
     }
-    if !block.is_shape_empty() {
+    if !block.is_collision_shape_empty() {
         return false;
     }
     let registry_block = azalea_registry::Block::from(block);
@@ -523,7 +523,7 @@ pub fn is_block_state_solid(block: BlockState) -> bool {
         // fast path
         return false;
     }
-    block.is_shape_full()
+    block.is_collision_shape_full()
 }
 
 #[cfg(test)]

codegen/lib/code/shapes.py

@@ -8,8 +8,7 @@ COLLISION_BLOCKS_RS_DIR = get_dir_location(
 def generate_block_shapes(blocks_pixlyzer: dict, shapes: dict, aabbs: dict, block_states_report):
     blocks, shapes = simplify_shapes(blocks_pixlyzer, shapes, aabbs)
 
-    code = generate_block_shapes_code(
-        blocks, shapes, block_states_report)
+    code = generate_block_shapes_code(blocks, shapes, block_states_report)
     with open(COLLISION_BLOCKS_RS_DIR, 'w') as f:
         f.write(code)
 
@@ -27,8 +26,8 @@ def simplify_shapes(blocks: dict, shapes: dict, aabbs: dict):
     used_shape_ids = set()
     # determine the used shape ids
     for _block_id, block_data in blocks.items():
-        block_shapes = [state.get('collision_shape')
-                        for state in block_data['states'].values()]
+        block_shapes = {state.get('collision_shape') for state in block_data['states'].values()}
+        block_shapes.update({state.get('outline_shape') for state in block_data['states'].values()})
         for s in block_shapes:
             used_shape_ids.add(s)
 
@@ -55,10 +54,14 @@ def simplify_shapes(blocks: dict, shapes: dict, aabbs: dict):
     new_blocks = {}
     for block_id, block_data in blocks.items():
         block_id = block_id.split(':')[-1]
-        block_shapes = [state.get('collision_shape')
-                        for state in block_data['states'].values()]
-        new_blocks[block_id] = [old_id_to_new_id[shape_id]
-                                for shape_id in block_shapes]
+
+        block_collision_shapes = [state.get('collision_shape') for state in block_data['states'].values()]
+        block_outline_shapes = [state.get('outline_shape') for state in block_data['states'].values()]
+
+        new_blocks[block_id] = {
+            'collision': [old_id_to_new_id[shape_id] for shape_id in block_collision_shapes],
+            'outline': [old_id_to_new_id[shape_id] for shape_id in block_outline_shapes]
+        }
 
     return new_blocks, new_shapes
 
@@ -71,41 +74,49 @@ def generate_block_shapes_code(blocks: dict, shapes: dict, block_states_report):
         generated_shape_code += generate_code_for_shape(shape_id, shape)
 
 
-    # static SHAPES_MAP: [&LazyLock<VoxelShape>; 26644] = [&SHAPE0, &SHAPE1, &SHAPE1, ...]
+    # static COLLISION_SHAPES_MAP: [&LazyLock<VoxelShape>; 26644] = [&SHAPE0, &SHAPE1, &SHAPE1, ...]
     empty_shapes = []
     full_shapes = []
 
     # the index into this list is the block state id
-    shapes_map = []
+    collision_shapes_map = []
+    outline_shapes_map = []
+
+    for block_id, shape_datas in blocks.items():
+        collision_shapes = shape_datas['collision']
+        outline_shapes = shape_datas['outline']
+
+        if isinstance(collision_shapes, int): collision_shapes = [collision_shapes]
+        if isinstance(outline_shapes, int): outline_shapes = [outline_shapes]
 
-    for block_id, shape_ids in blocks.items():
-        if isinstance(shape_ids, int):
-            shape_ids = [shape_ids]
         block_report_data = block_states_report['minecraft:' + block_id]
 
-        for possible_state, shape_id in zip(block_report_data['states'], shape_ids):
+        for possible_state, shape_id in zip(block_report_data['states'], collision_shapes):
             block_state_id = possible_state['id']
-
-            if shape_id == 0 :
-                empty_shapes.append(block_state_id)
-            elif shape_id == 1 :
-                full_shapes.append(block_state_id)
-
-            while len(shapes_map) <= block_state_id:
+            if shape_id == 0: empty_shapes.append(block_state_id)
+            elif shape_id == 1: full_shapes.append(block_state_id)
+            while len(collision_shapes_map) <= block_state_id:
                 # default to shape 1 for missing shapes (full block)
-                shapes_map.append(1)
-            shapes_map[block_state_id] = shape_id
-
-    
-
-    generated_map_code = f'static SHAPES_MAP: [&LazyLock<VoxelShape>; {len(shapes_map)}] = ['
+                collision_shapes_map.append(1)
+            collision_shapes_map[block_state_id] = shape_id
+        for possible_state, shape_id in zip(block_report_data['states'], outline_shapes):
+            block_state_id = possible_state['id']
+            while len(outline_shapes_map) <= block_state_id:
+                # default to shape 1 for missing shapes (full block)
+                outline_shapes_map.append(1)
+            outline_shapes_map[block_state_id] = shape_id
 
+    generated_map_code = f'static COLLISION_SHAPES_MAP: [&LazyLock<VoxelShape>; {len(collision_shapes_map)}] = ['
     empty_shape_match_code = convert_ints_to_rust_ranges(empty_shapes)
     block_shape_match_code = convert_ints_to_rust_ranges(full_shapes)
-
-    for block_state_id, shape_id in enumerate(shapes_map):
+    for block_state_id, shape_id in enumerate(collision_shapes_map):
         generated_map_code += f'&SHAPE{shape_id},\n'
-    generated_map_code += '];'
+    generated_map_code += '];\n'
+
+    generated_map_code += f'static OUTLINE_SHAPES_MAP: [&LazyLock<VoxelShape>; {len(outline_shapes_map)}] = ['
+    for block_state_id, shape_id in enumerate(outline_shapes_map):
+        generated_map_code += f'&SHAPE{shape_id},\n'
+    generated_map_code += '];\n'
 
     if empty_shape_match_code == '':
         print('Error: shape 0 was not found')
@@ -126,27 +137,31 @@ use crate::collision::{{self, Shapes}};
 use azalea_block::*;
 
 pub trait BlockWithShape {{
-    fn shape(&self) -> &'static VoxelShape;
+    fn collision_shape(&self) -> &'static VoxelShape;
+    fn outline_shape(&self) -> &'static VoxelShape;
     /// Tells you whether the block has an empty shape.
     ///
     /// This is slightly more efficient than calling `shape()` and comparing against `EMPTY_SHAPE`.
-    fn is_shape_empty(&self) -> bool;
-    fn is_shape_full(&self) -> bool;
+    fn is_collision_shape_empty(&self) -> bool;
+    fn is_collision_shape_full(&self) -> bool;
 }}
 
 {generated_shape_code}
 
 
 impl BlockWithShape for BlockState {{
-    fn shape(&self) -> &'static VoxelShape {{
-        SHAPES_MAP.get(self.id as usize).unwrap_or(&&SHAPE1)
+    fn collision_shape(&self) -> &'static VoxelShape {{
+        COLLISION_SHAPES_MAP.get(self.id as usize).unwrap_or(&&SHAPE1)
+    }}
+    fn outline_shape(&self) -> &'static VoxelShape {{
+        OUTLINE_SHAPES_MAP.get(self.id as usize).unwrap_or(&&SHAPE1)
     }}
 
-    fn is_shape_empty(&self) -> bool {{
+    fn is_collision_shape_empty(&self) -> bool {{
         matches!(self.id, {empty_shape_match_code})
     }}
 
-    fn is_shape_full(&self) -> bool {{
+    fn is_collision_shape_full(&self) -> bool {{
         matches!(self.id, {block_shape_match_code})
     }}
 }}