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Expand procedural terrain generation

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This commit is contained in:
Alexander Sellite 2026-08-20 21:42:50 -04:00
parent b82f6fe15c
commit 5d55afcc26
51 changed files with 1924 additions and 223 deletions
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42
tests/generated_world_runtime_validation.gd
View file

@ -94,11 +94,13 @@ func _validate_generated_region(
assert(_placement_count(placements, "chunk_0001") >= 1)
assert(_placement_count(placements, "chunk_0002") >= 1)
assert(_placement_count(placements, "chunk_0003") >= 1)
assert(_placement_count(placements, "chunk_0016") >= 1)
assert(_placement_count(placements, "chunk_0004") >= 1)
assert(_placement_count(placements, "chunk_0005") >= 1)
assert(_placement_count(placements, "chunk_0006") >= 1)
assert(_placement_count(placements, "chunk_0007") >= 1)
assert(_placement_count(placements, "chunk_0008") >= 1)
assert(_placement_count(placements, "chunk_0013") >= 1)
assert(_placement_count(placements, "chunk_0009") == 1)
assert(_placement_count(placements, "chunk_0010") == 4)
assert(
@ -350,7 +352,9 @@ func _validate_biome_catalog(
var coordinate: Vector2i = record.get("coordinate", Vector2i.ZERO)
var biome_id := region.get_biome_at(coordinate)
var tags: PackedStringArray = record.get("tags", PackedStringArray())
if "grass" in tags or "sand" in tags:
if "mixed_surface" in tags:
assert(biome_id == &"")
elif "grass" in tags or "sand" in tags:
assert(biome_id != &"")
var biome := catalog.definition_for_id(biome_id)
assert(biome != null and biome.supports_chunk_tags(tags))
@ -465,11 +469,14 @@ func _validate_authored_chunk_surfaces(
) -> void:
var generated := generator.get_generated_chunks_root()
var found_beach := false
var found_stream := false
var found_alternate_stream := false
var found_pond := false
var found_grass_ocean_edge := false
var found_grass_beach_transition := false
var found_grass_ocean_corner := false
var found_beach_ocean_corner := false
var found_grass_sand_diagonal := false
for chunk_root: Node in generated.get_children():
if chunk_root.name.begins_with("chunk_0002r"):
var beach := chunk_root.find_child(
@ -479,6 +486,27 @@ func _validate_authored_chunk_surfaces(
var material := beach.get_active_material(0)
assert(material != null and material.resource_name == "sand")
found_beach = true
elif (
chunk_root.name.begins_with("chunk_0003r")
or chunk_root.name.begins_with("chunk_0016r")
):
var stream_id := (
&"chunk_0016"
if chunk_root.name.begins_with("chunk_0016r")
else &"chunk_0003"
)
var stream := chunk_root.find_child(
String(stream_id), true, false
) as MeshInstance3D
assert(stream != null and stream.mesh != null)
var stream_materials := _material_names(stream)
assert("dirt" in stream_materials)
assert("grass_lite" in stream_materials)
assert("dirt_wall" in stream_materials)
if stream_id == &"chunk_0016":
found_alternate_stream = true
else:
found_stream = true
elif chunk_root.name.begins_with("chunk_0004r"):
var pond := chunk_root.find_child(
"chunk_0004", true, false
@ -532,12 +560,24 @@ func _validate_authored_chunk_surfaces(
var beach_corner_materials := _material_names(beach_ocean_corner)
assert("sand" in beach_corner_materials)
found_beach_ocean_corner = true
elif chunk_root.name.begins_with("chunk_0013r"):
var grass_sand_diagonal := chunk_root.find_child(
"chunk_0013", true, false
) as MeshInstance3D
assert(grass_sand_diagonal != null and grass_sand_diagonal.mesh != null)
var diagonal_materials := _material_names(grass_sand_diagonal)
assert("grass_lite" in diagonal_materials)
assert("sand" in diagonal_materials)
found_grass_sand_diagonal = true
assert(found_beach)
assert(found_stream)
assert(found_alternate_stream)
assert(found_pond)
assert(found_grass_ocean_edge)
assert(found_grass_beach_transition)
assert(found_grass_ocean_corner)
assert(found_beach_ocean_corner)
assert(found_grass_sand_diagonal)
func _material_names(mesh_instance: MeshInstance3D) -> PackedStringArray:

1
tests/manual/terrain_chunk_generator/terrain_chunk_compatibility_report.gd
View file

@ -122,4 +122,5 @@ func _make_generator() -> TerrainChunkGenerator:
"chunk_0008",
]
)
generator.grass_sand_smoothing_enabled = true
return generator

1
tests/manual/terrain_chunk_generator/terrain_chunk_generator_test.tscn
View file

@ -27,6 +27,7 @@ build_collision = true
show_chunk_labels = false
force_center_chunk_id = &"chunk_spawn"
required_chunk_ids = PackedStringArray("chunk_spawn", "chunk_0001", "chunk_0002", "chunk_0003", "chunk_0004", "chunk_0005", "chunk_0006", "chunk_0007", "chunk_0008")
grass_sand_smoothing_enabled = true
elevated_cliff_feature_enabled = true
[node name="Player" parent="." instance=ExtResource("4_player")]

347
tests/terrain_chunk_generator_validation.gd
View file

@ -17,6 +17,10 @@ const EXPECTED_IDS: Array[String] = [
"chunk_0010",
"chunk_0011",
"chunk_0012",
"chunk_0013",
"chunk_0014",
"chunk_0015",
"chunk_0016",
"chunk_spawn",
]
const REQUIRED_IDS: Array[String] = [
@ -32,7 +36,7 @@ const REQUIRED_IDS: Array[String] = [
]
const TEST_SEED := 13001
const CONNECTOR_STRESS_SEED := 287
const EXPECTED_SOLVER_VARIANT_COUNT := 31
const EXPECTED_SOLVER_VARIANT_COUNT := 35
const EXPECTED_VARIANT_COUNTS: Dictionary[StringName, int] = {
&"chunk_0000": 4,
&"chunk_0001": 4,
@ -47,6 +51,10 @@ const EXPECTED_VARIANT_COUNTS: Dictionary[StringName, int] = {
&"chunk_0010": 4,
&"chunk_0011": 4,
&"chunk_0012": 4,
&"chunk_0013": 4,
&"chunk_0014": 4,
&"chunk_0015": 4,
&"chunk_0016": 4,
&"chunk_spawn": 1,
}
@ -60,6 +68,7 @@ func _initialize() -> void:
func _run() -> void:
_validate_catalog()
_validate_profiles()
_validate_second_tier_coastal_layout()
_validate_generation()
_finish()
@ -87,6 +96,10 @@ func _validate_catalog() -> void:
var grass_beach_transition := CATALOG.definition_for_id(&"chunk_0006")
var grass_ocean_corner := CATALOG.definition_for_id(&"chunk_0007")
var beach_ocean_corner := CATALOG.definition_for_id(&"chunk_0008")
var grass_sand_diagonal := CATALOG.definition_for_id(&"chunk_0013")
var cliff_sea_edge := CATALOG.definition_for_id(&"chunk_0014")
var cliff_sea_corner := CATALOG.definition_for_id(&"chunk_0015")
var stream_variant := CATALOG.definition_for_id(&"chunk_0016")
var cliff_top := CATALOG.definition_for_id(&"chunk_0009")
var cliff_corner := CATALOG.definition_for_id(&"chunk_0010")
var cliff_edge := CATALOG.definition_for_id(&"chunk_0011")
@ -101,6 +114,10 @@ func _validate_catalog() -> void:
and grass_beach_transition != null
and grass_ocean_corner != null
and beach_ocean_corner != null
and grass_sand_diagonal != null
and cliff_sea_edge != null
and cliff_sea_corner != null
and stream_variant != null
and cliff_top != null
and cliff_corner != null
and cliff_edge != null
@ -117,6 +134,10 @@ func _validate_catalog() -> void:
and grass_beach_transition != null
and grass_ocean_corner != null
and beach_ocean_corner != null
and grass_sand_diagonal != null
and cliff_sea_edge != null
and cliff_sea_corner != null
and stream_variant != null
and cliff_top != null
and cliff_corner != null
and cliff_edge != null
@ -235,6 +256,48 @@ func _validate_catalog() -> void:
),
"The beach corner must join two straight beach ocean edges.",
)
_check(
grass_sand_diagonal.must_be_interior
and not grass_sand_diagonal.participates_in_base_solver
and "mixed_surface" in grass_sand_diagonal.tags,
(
"The grass-sand diagonal must remain an inland post-process "
+ "mixed-surface chunk."
),
)
_check(
grass_sand_diagonal.surface_tags_for_edge(
TerrainChunkTopology.Edge.NORTH
) == PackedStringArray(["sand"])
and grass_sand_diagonal.surface_tags_for_edge(
TerrainChunkTopology.Edge.WEST
) == PackedStringArray(["sand"])
and grass_sand_diagonal.surface_tags_for_edge(
TerrainChunkTopology.Edge.EAST
) == PackedStringArray(["grass"])
and grass_sand_diagonal.surface_tags_for_edge(
TerrainChunkTopology.Edge.SOUTH
) == PackedStringArray(["grass"]),
"The diagonal's authored edges must retain two sand and two grass sides.",
)
var stream := CATALOG.definition_for_id(&"chunk_0003")
_check(
stream != null
and is_equal_approx(stream.selection_weight, 0.3)
and is_equal_approx(stream_variant.selection_weight, 0.3)
and stream_variant.tags == stream.tags
and stream_variant.allowed_neighbor_tags
== stream.allowed_neighbor_tags
and stream_variant.water_inlet_edges == stream.water_inlet_edges
and stream_variant.water_outlet_edges == stream.water_outlet_edges
and stream_variant.water_surface_size == stream.water_surface_size
and stream_variant.water_surface_offset
== stream.water_surface_offset,
(
"Both stream visuals must share one combined selection weight "
+ "and identical terrain/water behavior."
),
)
for cliff_definition: TerrainChunkDefinition in [
cliff_top,
cliff_corner,
@ -248,6 +311,43 @@ func _validate_catalog() -> void:
and cliff_definition.base_layer_mesh_name == &"chunk_0000",
"Every second-tier piece must overlay level-one grass inland.",
)
for coastal_cliff: TerrainChunkDefinition in [
cliff_sea_edge,
cliff_sea_corner,
]:
_check(
coastal_cliff.overlay_only
and coastal_cliff.base_layer_scene == null
and not coastal_cliff.must_be_interior
and coastal_cliff.prefers_map_boundary
and "coast" in coastal_cliff.tags
and "elevation_2_sea_edge" in coastal_cliff.tags,
(
"Each second-tier sea piece must be a complete coastal "
+ "overlay without an inland grass base."
),
)
_check(
cliff_sea_edge.ocean_facing_edges
== (1 << int(TerrainChunkTopology.Edge.EAST)),
"The second-tier sea edge must face east before rotation.",
)
_check(
cliff_sea_corner.ocean_facing_edges
== (
(1 << int(TerrainChunkTopology.Edge.EAST))
| (1 << int(TerrainChunkTopology.Edge.SOUTH))
),
"The second-tier sea corner must face east and south before rotation.",
)
_check(
cliff_sea_corner.minimum_required_neighbors == 2
and (
"elevation_2_sea_edge"
in cliff_sea_corner.required_neighbor_tags
),
"The second-tier sea corner must join two straight sea edges.",
)
_check(
cliff_top.minimum_required_neighbors == 4
and "elevation_2" in cliff_top.required_neighbor_tags,
@ -293,6 +393,91 @@ func _validate_profiles() -> void:
)
func _validate_second_tier_coastal_layout() -> void:
var generator := TerrainChunkGenerator.new()
generator.catalog = CATALOG
generator.grid_size = Vector2i(4, 4)
generator.generate_on_ready = false
generator.build_collision = false
generator.force_center_chunk_id = &""
root.add_child(generator)
var keys := PackedStringArray()
for row: int in generator.grid_size.y:
for column: int in generator.grid_size.x:
var at_north := row == 0
var at_east := column == generator.grid_size.x - 1
var at_south := row == generator.grid_size.y - 1
var at_west := column == 0
if at_north and at_west:
keys.append("chunk_0015@2")
elif at_north and at_east:
keys.append("chunk_0015@1")
elif at_south and at_east:
keys.append("chunk_0015@0")
elif at_south and at_west:
keys.append("chunk_0015@3")
elif at_north:
keys.append("chunk_0014@1")
elif at_east:
keys.append("chunk_0014@0")
elif at_south:
keys.append("chunk_0014@3")
elif at_west:
keys.append("chunk_0014@2")
else:
keys.append("chunk_0009@0")
_check(
generator.generate_from_placement_keys(keys),
(
"The second-tier sea edge and corner must form a complete "
+ "raised coastal perimeter."
),
)
if generator.placement_keys().size() == keys.size():
_check(
_all_neighbor_edges_match(generator),
"Every raised coastal-perimeter seam must match.",
)
_check(
_count_placements(generator.placement_keys(), "chunk_0014") == 8
and _count_placements(
generator.placement_keys(), "chunk_0015"
) == 4,
"The raised coastal perimeter must use its straight and corner pieces.",
)
for record: Dictionary in generator.placement_records():
var stable_id: StringName = record.get("stable_id", &"")
if stable_id not in [&"chunk_0014", &"chunk_0015"]:
continue
var coordinate: Vector2i = record.get(
"coordinate", Vector2i.ZERO
)
var variant := _find_variant(
generator,
stable_id,
int(record.get("rotation_quarters", 0)),
)
_check(
variant != null
and generator._variant_respects_ocean_boundary(
variant, coordinate
),
"Every second-tier sea opening must face outside the terrain grid.",
)
var generated := generator.get_generated_chunks_root()
if generated != null:
for child: Node in generated.get_children():
var stable_id := StringName(
child.get_meta(&"terrain_chunk_id", &"")
)
if stable_id in [&"chunk_0014", &"chunk_0015"]:
_check(
child.get_node_or_null("TerrainBaseLayer") == null,
"Second-tier sea pieces must not render inland grass over ocean.",
)
generator.free()
func _validate_generation() -> void:
var first := _make_generator()
root.add_child(first)
@ -308,6 +493,10 @@ func _validate_generation() -> void:
_placements_contain(first_keys, stable_id),
"Generated diagnostic must contain %s." % stable_id,
)
_check(
_placements_contain(first_keys, "chunk_0013"),
"Generated terrain must replace sharp grass-sand corners with diagonals.",
)
_check(
_all_neighbor_edges_match(first),
"Every generated neighboring edge must match.",
@ -416,8 +605,12 @@ func _validate_authored_rotations(generator: TerrainChunkGenerator) -> void:
)
var stream := CATALOG.definition_for_id(&"chunk_0003")
_check(stream != null, "The stream definition must be available.")
if stream == null:
var alternate_stream := CATALOG.definition_for_id(&"chunk_0016")
_check(
stream != null and alternate_stream != null,
"Both stream visual definitions must be available.",
)
if stream == null or alternate_stream == null:
return
for quarter_turns: int in 4:
var stream_variant := _find_variant(
@ -429,7 +622,16 @@ func _validate_authored_rotations(generator: TerrainChunkGenerator) -> void:
stream_variant != null,
"The stream must support rotation %d." % quarter_turns,
)
if stream_variant == null:
var alternate_variant := _find_variant(
generator,
&"chunk_0016",
quarter_turns,
)
_check(
alternate_variant != null,
"The alternate stream must support rotation %d." % quarter_turns,
)
if stream_variant == null or alternate_variant == null:
continue
var expected_inlet := 1 << int(TerrainChunkTopology.rotated_edge(
TerrainChunkTopology.Edge.NORTH,
@ -449,6 +651,25 @@ func _validate_authored_rotations(generator: TerrainChunkGenerator) -> void:
== expected_outlet,
"The rotated stream outlet must follow its authored orientation.",
)
_check(
alternate_variant.rotated_edge_mask(
alternate_stream.water_inlet_edges
) == expected_inlet
and alternate_variant.rotated_edge_mask(
alternate_stream.water_outlet_edges
) == expected_outlet,
"The alternate stream connectors must rotate exactly like the original.",
)
for edge_value: int in TerrainChunkTopology.Edge.values():
var edge := edge_value as TerrainChunkTopology.Edge
_check(
stream_variant.profile(edge).signature(
TerrainChunkGenerator.CONSTRAINT_PROFILE_QUANTIZATION
) == alternate_variant.profile(edge).signature(
TerrainChunkGenerator.CONSTRAINT_PROFILE_QUANTIZATION
),
"Both stream visuals must expose identical terrain edge profiles.",
)
var beach := CATALOG.definition_for_id(&"chunk_0002")
_check(beach != null, "The beach definition must be available.")
@ -611,6 +832,62 @@ func _validate_authored_rotations(generator: TerrainChunkGenerator) -> void:
),
"The beach corner's west side must join a rotated straight beach.",
)
var cliff_top_zero := _find_variant(generator, &"chunk_0009", 0)
var cliff_sea_edge_zero := _find_variant(generator, &"chunk_0014", 0)
var cliff_sea_edge_south := _find_variant(generator, &"chunk_0014", 3)
var cliff_sea_corner_zero := _find_variant(generator, &"chunk_0015", 0)
_check(
cliff_top_zero != null
and cliff_sea_edge_zero != null
and cliff_sea_edge_south != null
and cliff_sea_corner_zero != null,
"The second-tier sea edge variants must be available.",
)
if (
cliff_top_zero != null
and cliff_sea_edge_zero != null
and cliff_sea_edge_south != null
and cliff_sea_corner_zero != null
):
_check(
cliff_sea_edge_zero.profile(
TerrainChunkTopology.Edge.EAST
).points.is_empty(),
"The second-tier sea edge must remain open on its ocean side.",
)
_check(
cliff_sea_corner_zero.profile(
TerrainChunkTopology.Edge.EAST
).points.is_empty()
and cliff_sea_corner_zero.profile(
TerrainChunkTopology.Edge.SOUTH
).points.is_empty(),
"The second-tier sea corner must retain both ocean openings.",
)
_check(
generator._edges_are_compatible(
cliff_sea_edge_zero,
TerrainChunkTopology.Edge.WEST,
cliff_top_zero,
TerrainChunkTopology.Edge.EAST,
),
"The second-tier sea edge must join the raised grass top inland.",
)
_check(
generator._edges_are_compatible(
cliff_sea_corner_zero,
TerrainChunkTopology.Edge.NORTH,
cliff_sea_edge_zero,
TerrainChunkTopology.Edge.SOUTH,
)
and generator._edges_are_compatible(
cliff_sea_corner_zero,
TerrainChunkTopology.Edge.WEST,
cliff_sea_edge_south,
TerrainChunkTopology.Edge.EAST,
),
"The second-tier sea corner must join two straight sea edges.",
)
var flat_grass := _find_variant(generator, &"chunk_0000", 0)
var flat_sand := _find_variant(generator, &"chunk_0001", 0)
_check(
@ -649,11 +926,57 @@ func _validate_authored_rotations(generator: TerrainChunkGenerator) -> void:
),
"No transition rotation may accept sand behind it.",
)
for quarter_turns: int in 4:
var diagonal := _find_variant(
generator,
&"chunk_0013",
quarter_turns,
)
_check(
diagonal != null,
"The grass-sand diagonal must support rotation %d."
% quarter_turns,
)
if diagonal == null:
continue
for source_edge_value: int in TerrainChunkTopology.Edge.values():
var source_edge := source_edge_value as TerrainChunkTopology.Edge
var edge := TerrainChunkTopology.rotated_edge(
source_edge,
quarter_turns,
)
var neighbor_edge := TerrainChunkTopology.opposite_edge(edge)
var expects_sand := source_edge in [
TerrainChunkTopology.Edge.NORTH,
TerrainChunkTopology.Edge.WEST,
]
var expected := flat_sand if expects_sand else flat_grass
var rejected := flat_grass if expects_sand else flat_sand
_check(
generator._edges_are_compatible(
diagonal,
edge,
expected,
neighbor_edge,
),
"Each rotated diagonal edge must accept its authored surface.",
)
_check(
not generator._edges_are_compatible(
diagonal,
edge,
rejected,
neighbor_edge,
),
"No rotated diagonal edge may accept the opposite surface.",
)
for stable_id: StringName in [
&"chunk_0005",
&"chunk_0006",
&"chunk_0007",
&"chunk_0008",
&"chunk_0014",
&"chunk_0015",
]:
for quarter_turns: int in 4:
var coast_variant := _find_variant(
@ -674,15 +997,12 @@ func _validate_authored_rotations(generator: TerrainChunkGenerator) -> void:
),
"%s must never place its ocean edge inside the map." % stable_id,
)
if stable_id != &"chunk_0007" and stable_id != &"chunk_0008":
var coast_definition := CATALOG.definition_for_id(stable_id)
if coast_definition == null:
continue
var boundary_coordinate := Vector2i(3, 3)
var ocean_edges := coast_variant.rotated_edge_mask(
(
grass_ocean_corner.ocean_facing_edges
if stable_id == &"chunk_0007"
else beach_ocean_corner.ocean_facing_edges
)
coast_definition.ocean_facing_edges
)
for edge_value: int in TerrainChunkTopology.Edge.values():
if (ocean_edges & (1 << edge_value)) == 0:
@ -701,15 +1021,15 @@ func _validate_authored_rotations(generator: TerrainChunkGenerator) -> void:
coast_variant,
boundary_coordinate,
),
"Each coast corner rotation must fit its matching map corner.",
"Each coast rotation must fit its matching open map boundary.",
)
func _validate_generation_summary(generator: TerrainChunkGenerator) -> void:
var summary := generator._build_summary()
_check(
int(summary.get("variant_count", 0)) == 53,
"The current catalog must expose all 53 authored rotations.",
int(summary.get("variant_count", 0)) == 69,
"The current catalog must expose all 69 authored rotations.",
)
_check(
int(summary.get("solver_variant_count", 0))
@ -762,6 +1082,7 @@ func _make_generator() -> TerrainChunkGenerator:
generator.build_collision = false
generator.force_center_chunk_id = &"chunk_spawn"
generator.required_chunk_ids = PackedStringArray(REQUIRED_IDS)
generator.grass_sand_smoothing_enabled = true
generator.maximum_backtracks = 100000
return generator

20
tools/blender/export_terrain_chunks.py
View file

@ -282,15 +282,21 @@ def _discover_chunks(tolerance: float) -> list[ChunkSource]:
# Coastline meshes may intentionally stop before the positive-X edge,
# leaving the surrounding ocean visible. Positive X is the canonical
# authored ocean direction; Godot supplies the quarter-turn variants.
# Elevated inland cliff overlays intentionally stop at their downhill
# edge. The runtime places them over the existing flat grass chunk, so
# these omissions are not coastline openings or holes in the final cell.
layered_inland_cliff = "cliff_2" in label
allow_open_east_edge = "ocean_edge" in label or layered_inland_cliff
# Elevated inland cliff overlays also stop at their downhill edge,
# while second-tier sea pieces carry that edge down to ocean depth.
layered_cliff = "cliff_2" in label
allow_open_east_edge = (
"ocean_edge" in label
or "sea_edge" in label
or "sea_corner" in label
or layered_cliff
)
# Corner pieces additionally leave canonical negative Y open. Their
# two marked ocean edges rotate together at runtime.
# two marked outer edges rotate together at runtime.
allow_open_south_edge = (
"ocean_edge_corner" in label or layered_inland_cliff
"ocean_edge_corner" in label
or "sea_corner" in label
or (layered_cliff and "corner" in label)
)
bound_problems = _validate_bounds(
bounds,

1
world/generation/biomes/definitions/biome_coast.tres
View file

@ -17,4 +17,5 @@ script = ExtResource("1_definition")
stable_id = &"biome_coast"
label = "coast"
required_chunk_tags = PackedStringArray("sand")
forbidden_chunk_tags = PackedStringArray("mixed_surface")
prop_rules = Array[ExtResource("2_rule")]([SubResource("Rule_sand_tree")])

2
world/generation/biomes/definitions/biome_forest.tres
View file

@ -27,6 +27,6 @@ script = ExtResource("1_definition")
stable_id = &"biome_forest"
label = "forest"
required_chunk_tags = PackedStringArray("grass")
forbidden_chunk_tags = PackedStringArray("spawn")
forbidden_chunk_tags = PackedStringArray("spawn", "mixed_surface")
region_weight = 1.4
prop_rules = Array[ExtResource("2_rule")]([SubResource("Rule_grass_tree"), SubResource("Rule_grass_detail")])

2
world/generation/biomes/definitions/biome_pine_forest.tres
View file

@ -27,6 +27,6 @@ script = ExtResource("1_definition")
stable_id = &"biome_pine_forest"
label = "pine forest"
required_chunk_tags = PackedStringArray("grass")
forbidden_chunk_tags = PackedStringArray("spawn")
forbidden_chunk_tags = PackedStringArray("spawn", "mixed_surface")
region_weight = 1.2
prop_rules = Array[ExtResource("2_rule")]([SubResource("Rule_grass_tree"), SubResource("Rule_grass_detail")])

1
world/generation/biomes/definitions/biome_plains.tres
View file

@ -24,5 +24,6 @@ script = ExtResource("1_definition")
stable_id = &"biome_plains"
label = "plains"
required_chunk_tags = PackedStringArray("grass")
forbidden_chunk_tags = PackedStringArray("mixed_surface")
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process/hdr_as_srgb=false
process/hdr_clamp_exposure=false
process/size_limit=0
detect_3d/compress_to=0

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world/generation/chunks/assets/chunk_0016_grass_lite.png Normal file
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45
world/generation/chunks/assets/chunk_0016_grass_lite.png.import Normal file
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@ -0,0 +1,45 @@
[remap]
importer="texture"
type="CompressedTexture2D"
uid="uid://dn84haedw08rx"
path.s3tc="res://.godot/imported/chunk_0016_grass_lite.png-df65a0c79eb0a4e70a36096ead0f76f3.s3tc.ctex"
path.etc2="res://.godot/imported/chunk_0016_grass_lite.png-df65a0c79eb0a4e70a36096ead0f76f3.etc2.ctex"
metadata={
"imported_formats": ["s3tc_bptc", "etc2_astc"],
"vram_texture": true
}
generator_parameters={
"md5": "4dc1ac400d85d9b3e4f43a5af0a38ed4"
}
[deps]
source_file="res://world/generation/chunks/assets/chunk_0016_grass_lite.png"
dest_files=["res://.godot/imported/chunk_0016_grass_lite.png-df65a0c79eb0a4e70a36096ead0f76f3.s3tc.ctex", "res://.godot/imported/chunk_0016_grass_lite.png-df65a0c79eb0a4e70a36096ead0f76f3.etc2.ctex"]
[params]
compress/mode=2
compress/high_quality=false
compress/lossy_quality=0.7
compress/uastc_level=0
compress/rdo_quality_loss=0.0
compress/hdr_compression=1
compress/normal_map=0
compress/channel_pack=0
mipmaps/generate=false
mipmaps/limit=-1
roughness/mode=0
roughness/src_normal=""
process/channel_remap/red=0
process/channel_remap/green=1
process/channel_remap/blue=2
process/channel_remap/alpha=3
process/fix_alpha_border=true
process/premult_alpha=false
process/normal_map_invert_y=false
process/hdr_as_srgb=false
process/hdr_clamp_exposure=false
process/size_limit=0
detect_3d/compress_to=0

2
world/generation/chunks/definitions/chunk_0003.tres
View file

@ -9,7 +9,7 @@ stable_id = &"chunk_0003"
label = "stream"
packed_scene = ExtResource("2_scene")
primary_mesh_name = &"chunk_0003"
selection_weight = 0.6
selection_weight = 0.3
tags = PackedStringArray("land", "walkable", "fresh_water", "river", "flowing")
allowed_neighbor_tags = PackedStringArray("grass")
preferred_neighbor_tags = PackedStringArray("grass")

28
world/generation/chunks/definitions/chunk_0013.tres Normal file
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@ -0,0 +1,28 @@
[gd_resource type="Resource" script_class="TerrainChunkDefinition" load_steps=3 format=3]
[ext_resource type="Script" path="res://world/generation/terrain_chunk_definition.gd" id="1_definition"]
[ext_resource type="PackedScene" path="res://world/generation/chunks/assets/chunk_0013.glb" id="2_scene"]
[resource]
script = ExtResource("1_definition")
stable_id = &"chunk_0013"
label = "grass-sand diagonal"
packed_scene = ExtResource("2_scene")
primary_mesh_name = &"chunk_0013"
participates_in_base_solver = false
allowed_rotation_mask = 15
selection_weight = 0.8
maximum_placements = 16
tags = PackedStringArray("land", "walkable", "grass", "sand", "flat", "transition", "mixed_surface")
allowed_neighbor_tags = PackedStringArray("grass", "sand")
forbidden_neighbor_tags = PackedStringArray("fresh_water", "spawn")
north_allowed_neighbor_tags = PackedStringArray("sand")
east_allowed_neighbor_tags = PackedStringArray("grass")
south_allowed_neighbor_tags = PackedStringArray("grass")
west_allowed_neighbor_tags = PackedStringArray("sand")
north_surface_tags = PackedStringArray("sand")
east_surface_tags = PackedStringArray("grass")
south_surface_tags = PackedStringArray("grass")
west_surface_tags = PackedStringArray("sand")
preferred_neighbor_tags = PackedStringArray("grass", "sand", "transition")
must_be_interior = true

24
world/generation/chunks/definitions/chunk_0014.tres Normal file
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@ -0,0 +1,24 @@
[gd_resource type="Resource" script_class="TerrainChunkDefinition" load_steps=3 format=3]
[ext_resource type="Script" path="res://world/generation/terrain_chunk_definition.gd" id="1_definition"]
[ext_resource type="PackedScene" path="res://world/generation/chunks/assets/chunk_0014.glb" id="2_scene"]
[resource]
script = ExtResource("1_definition")
stable_id = &"chunk_0014"
label = "second-tier grass sea edge"
packed_scene = ExtResource("2_scene")
primary_mesh_name = &"chunk_0014"
overlay_only = true
selection_weight = 0.28
maximum_placements = 32
tags = PackedStringArray("land", "walkable", "grass", "coast", "cliff", "edge", "elevation_2", "elevation_2_border", "elevation_2_sea_edge")
allowed_neighbor_tags = PackedStringArray("elevation_2")
north_allowed_neighbor_tags = PackedStringArray("elevation_2_sea_edge")
south_allowed_neighbor_tags = PackedStringArray("elevation_2_sea_edge")
west_allowed_neighbor_tags = PackedStringArray("elevation_2_top")
required_neighbor_tags = PackedStringArray("elevation_2_top")
minimum_required_neighbors = 1
preferred_neighbor_tags = PackedStringArray("elevation_2", "coast")
prefers_map_boundary = true
ocean_facing_edges = 2

23
world/generation/chunks/definitions/chunk_0015.tres Normal file
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@ -0,0 +1,23 @@
[gd_resource type="Resource" script_class="TerrainChunkDefinition" load_steps=3 format=3]
[ext_resource type="Script" path="res://world/generation/terrain_chunk_definition.gd" id="1_definition"]
[ext_resource type="PackedScene" path="res://world/generation/chunks/assets/chunk_0015.glb" id="2_scene"]
[resource]
script = ExtResource("1_definition")
stable_id = &"chunk_0015"
label = "second-tier grass sea corner"
packed_scene = ExtResource("2_scene")
primary_mesh_name = &"chunk_0015"
overlay_only = true
selection_weight = 0.12
maximum_placements = 16
tags = PackedStringArray("land", "walkable", "grass", "coast", "cliff", "corner", "elevation_2", "elevation_2_border", "elevation_2_sea_edge")
allowed_neighbor_tags = PackedStringArray("elevation_2")
north_allowed_neighbor_tags = PackedStringArray("elevation_2_sea_edge")
west_allowed_neighbor_tags = PackedStringArray("elevation_2_sea_edge")
required_neighbor_tags = PackedStringArray("elevation_2_sea_edge")
minimum_required_neighbors = 2
preferred_neighbor_tags = PackedStringArray("elevation_2", "coast")
prefers_map_boundary = true
ocean_facing_edges = 6

19
world/generation/chunks/definitions/chunk_0016.tres Normal file
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@ -0,0 +1,19 @@
[gd_resource type="Resource" script_class="TerrainChunkDefinition" format=3]
[ext_resource type="Script" path="res://world/generation/terrain_chunk_definition.gd" id="1_definition"]
[ext_resource type="PackedScene" path="res://world/generation/chunks/assets/chunk_0016.glb" id="2_scene"]
[resource]
script = ExtResource("1_definition")
stable_id = &"chunk_0016"
label = "stream variant"
packed_scene = ExtResource("2_scene")
primary_mesh_name = &"chunk_0016"
selection_weight = 0.3
tags = PackedStringArray("land", "walkable", "fresh_water", "river", "flowing")
allowed_neighbor_tags = PackedStringArray("grass")
preferred_neighbor_tags = PackedStringArray("grass")
water_inlet_edges = 1
water_outlet_edges = 4
water_surface_size = Vector2(2.1, 10)
water_surface_offset = Vector2(-0.315, 0)

8
world/generation/chunks/terrain_chunk_catalog.tres
View file

@ -1,4 +1,4 @@
[gd_resource type="Resource" script_class="TerrainChunkCatalog" load_steps=17 format=3]
[gd_resource type="Resource" script_class="TerrainChunkCatalog" load_steps=21 format=3]
[ext_resource type="Script" path="res://world/generation/terrain_chunk_catalog.gd" id="1_catalog"]
[ext_resource type="Resource" path="res://world/generation/chunks/definitions/chunk_0000.tres" id="2_grass"]
@ -16,8 +16,12 @@
[ext_resource type="Resource" path="res://world/generation/chunks/definitions/chunk_0010.tres" id="14_cliff_corner"]
[ext_resource type="Resource" path="res://world/generation/chunks/definitions/chunk_0011.tres" id="15_cliff_edge"]
[ext_resource type="Resource" path="res://world/generation/chunks/definitions/chunk_0012.tres" id="16_cliff_ramp"]
[ext_resource type="Resource" path="res://world/generation/chunks/definitions/chunk_0013.tres" id="17_grass_sand_diagonal"]
[ext_resource type="Resource" path="res://world/generation/chunks/definitions/chunk_0014.tres" id="18_cliff_sea_edge"]
[ext_resource type="Resource" path="res://world/generation/chunks/definitions/chunk_0015.tres" id="19_cliff_sea_corner"]
[ext_resource type="Resource" path="res://world/generation/chunks/definitions/chunk_0016.tres" id="20_stream_variant"]
[resource]
script = ExtResource("1_catalog")
chunk_size = 10.0
definitions = Array[ExtResource("7_definition_script")]([ExtResource("2_grass"), ExtResource("3_sand"), ExtResource("4_beach"), ExtResource("5_stream"), ExtResource("6_pond"), ExtResource("9_grass_ocean_edge"), ExtResource("10_grass_beach_transition"), ExtResource("11_grass_ocean_corner"), ExtResource("12_beach_ocean_corner"), ExtResource("13_cliff_top"), ExtResource("14_cliff_corner"), ExtResource("15_cliff_edge"), ExtResource("16_cliff_ramp"), ExtResource("8_spawn")])
definitions = Array[ExtResource("7_definition_script")]([ExtResource("2_grass"), ExtResource("3_sand"), ExtResource("4_beach"), ExtResource("5_stream"), ExtResource("20_stream_variant"), ExtResource("6_pond"), ExtResource("9_grass_ocean_edge"), ExtResource("10_grass_beach_transition"), ExtResource("11_grass_ocean_corner"), ExtResource("12_beach_ocean_corner"), ExtResource("17_grass_sand_diagonal"), ExtResource("13_cliff_top"), ExtResource("14_cliff_corner"), ExtResource("15_cliff_edge"), ExtResource("16_cliff_ramp"), ExtResource("18_cliff_sea_edge"), ExtResource("19_cliff_sea_corner"), ExtResource("8_spawn")])

1
world/generation/generated_world_region.tscn
View file

@ -37,6 +37,7 @@ generate_on_ready = false
build_collision = true
force_center_chunk_id = &"chunk_spawn"
required_chunk_ids = PackedStringArray("chunk_spawn", "chunk_0001", "chunk_0002", "chunk_0003", "chunk_0004", "chunk_0005", "chunk_0006", "chunk_0007", "chunk_0008")
grass_sand_smoothing_enabled = true
elevated_cliff_feature_enabled = true
required_chunk_weight_multiplier = 64.0
maximum_backtracks = 100000

12
world/generation/terrain_chunk_catalog.gd
View file

@ -38,10 +38,16 @@ func validation_errors() -> PackedStringArray:
"%s must define both base-layer scene and mesh name."
% definition.stable_id
)
if definition.overlay_only and definition.base_layer_scene == null:
if (
definition.overlay_only
and definition.base_layer_scene == null
and definition.ocean_facing_edges == 0
):
errors.append(
"%s is overlay-only but has no base-layer scene."
% definition.stable_id
(
"%s is an inland overlay but has no base-layer scene."
% definition.stable_id
)
)
if definition.allowed_rotation_mask == 0:
errors.append("%s allows no rotations." % definition.stable_id)

41
world/generation/terrain_chunk_definition.gd
View file

@ -12,9 +12,14 @@ extends Resource
@export var base_layer_scene: PackedScene
@export var base_layer_mesh_name: StringName
## Overlay-only chunks replace a reserved base-terrain placement after the
## ordinary terrain solve. They remain in placement manifests and runtime
## output, but do not inflate every cell's global solver domain.
## ordinary terrain solve. Inland overlays normally provide base_layer_scene;
## complete coastal overlays can instead carry their own descent to sea level.
## They remain in placement manifests and runtime output, but do not inflate
## every cell's global solver domain.
@export var overlay_only := false
## Post-process pieces remain available as authored variants and in placement
## manifests, but do not participate in the ordinary base-terrain solve.
@export var participates_in_base_solver := true
@export_group("")
@export_flags("0 degrees", "90 degrees", "180 degrees", "270 degrees")
var allowed_rotation_mask := 15
@ -38,6 +43,16 @@ var allowed_rotation_mask := 15
@export var south_allowed_neighbor_tags := PackedStringArray()
@export var west_allowed_neighbor_tags := PackedStringArray()
@export_group("")
## Optional canonical descriptions of the visible terrain surface at each
## edge. Empty edges inherit the definition's ordinary tags. Mixed-surface
## chunks use these to prevent a visually grass edge from joining sand (or the
## reverse) even when the chunk itself carries both biome tags.
@export_group("Directional Surface Rules")
@export var north_surface_tags := PackedStringArray()
@export var east_surface_tags := PackedStringArray()
@export var south_surface_tags := PackedStringArray()
@export var west_surface_tags := PackedStringArray()
@export_group("")
## When non-empty, at least this many in-grid cardinal neighbors must carry one
## of the listed tags. This supports statements such as "three sides around the
## spawn must be safe grass" without hard-coding a particular chunk ID.
@ -106,6 +121,28 @@ func directional_allowed_neighbor_tags(
return PackedStringArray()
func surface_tags_for_edge(
edge: TerrainChunkTopology.Edge,
) -> PackedStringArray:
var edge_tags := directional_surface_tags(edge)
return tags if edge_tags.is_empty() else edge_tags
func directional_surface_tags(
edge: TerrainChunkTopology.Edge,
) -> PackedStringArray:
match edge:
TerrainChunkTopology.Edge.NORTH:
return north_surface_tags
TerrainChunkTopology.Edge.EAST:
return east_surface_tags
TerrainChunkTopology.Edge.SOUTH:
return south_surface_tags
TerrainChunkTopology.Edge.WEST:
return west_surface_tags
return PackedStringArray()
func _allows_neighbor_with_tags(
neighbor: TerrainChunkDefinition,
allowed_tags: PackedStringArray,

970
world/generation/terrain_chunk_generator.gd
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File diff suppressed because it is too large Load diff

17
world/generation/terrain_chunk_variant.gd
View file

@ -35,6 +35,10 @@ func allows_non_water_neighbor_on_edge(
)
func surface_tags(edge: TerrainChunkTopology.Edge) -> PackedStringArray:
return definition.surface_tags_for_edge(source_edge(edge))
func topology_signature(quantization: float) -> String:
var tokens := PackedStringArray()
for edge_value: int in TerrainChunkTopology.Edge.values():
@ -44,9 +48,10 @@ func topology_signature(quantization: float) -> String:
func constraint_signature(quantization: float) -> String:
return "%s|neighbors:%s|ocean:%d|in:%d|out:%d" % [
return "%s|neighbors:%s|surfaces:%s|ocean:%d|in:%d|out:%d" % [
topology_signature(quantization),
_neighbor_rule_signature(),
_surface_rule_signature(),
rotated_edge_mask(definition.ocean_facing_edges),
rotated_edge_mask(definition.water_inlet_edges),
rotated_edge_mask(definition.water_outlet_edges),
@ -65,6 +70,16 @@ func _neighbor_rule_signature() -> String:
return "/".join(edge_tokens)
func _surface_rule_signature() -> String:
var edge_tokens := PackedStringArray()
for edge_value: int in TerrainChunkTopology.Edge.values():
var edge := edge_value as TerrainChunkTopology.Edge
var edge_tags: PackedStringArray = surface_tags(edge).duplicate()
edge_tags.sort()
edge_tokens.append(",".join(edge_tags))
return "/".join(edge_tokens)
func rotated_edge_mask(source_mask: int) -> int:
var result := 0
for edge_value: int in TerrainChunkTopology.Edge.values():