198 lines
6.3 KiB
GDScript
198 lines
6.3 KiB
GDScript
# Mde (P5) —— ClientVS22 EffectMesh 的 .mde 二进制读取器。
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#
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# 40250/ClientVS22/source/EffectLib/EffectMesh.cpp 支持两种布局：
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# EffectData —— v1：每个几何体固定顶点/索引/UV 数量，每帧只有 visibility；
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# MDEData002 —— v2：每帧带 changed/visibility 以及三组数量。
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# 参考端把索引顶点展开成 TPTVertex，并把 UV.y 取反；这里同样展开，
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# 同时把客户端厘米坐标换成 Godot 的米坐标。
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extends RefCounted
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const HEADER_SIZE := 11
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const GEOMETRY_HEADER_SIZE := 160 # object name 32 + diffuse path 128
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const MAX_GEOMETRIES := 256
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const MAX_FRAMES := 4096
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const MAX_ELEMENTS := 1_000_000
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var last_error := ""
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func parse_file(path: String) -> Dictionary:
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last_error = ""
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if not FileAccess.file_exists(path):
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last_error = "no such file: " + path
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return {}
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return parse_bytes(FileAccess.get_file_as_bytes(path))
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func parse_bytes(data: PackedByteArray) -> Dictionary:
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last_error = ""
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if data.size() < HEADER_SIZE + 8:
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last_error = "truncated header"
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return {}
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var header := _fixed_string(data, 0, HEADER_SIZE)
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var version := 0
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if header == "EffectData":
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version = 1
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elif header == "MDEData002":
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version = 2
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else:
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last_error = "unknown header: " + header
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return {}
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var offset := HEADER_SIZE
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var geometry_count := int(data.decode_s32(offset))
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offset += 4
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var frame_count := int(data.decode_s32(offset))
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offset += 4
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if geometry_count < 1 or geometry_count > MAX_GEOMETRIES:
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last_error = "invalid geometry count: %d" % geometry_count
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return {}
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if frame_count < 1 or frame_count > MAX_FRAMES:
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last_error = "invalid frame count: %d" % frame_count
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return {}
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var geometries: Array = []
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for geometry_index in geometry_count:
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if not _has(data, offset, GEOMETRY_HEADER_SIZE):
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last_error = "truncated geometry header %d" % geometry_index
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return {}
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var name := _fixed_string(data, offset, 32)
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offset += 32
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var diffuse := _fixed_string(data, offset, 128)
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offset += 128
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var fixed_vertex_count := 0
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var fixed_index_count := 0
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var fixed_uv_count := 0
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if version == 1:
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if not _has(data, offset, 12):
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last_error = "truncated v1 geometry counts %d" % geometry_index
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return {}
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fixed_vertex_count = int(data.decode_u32(offset))
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fixed_index_count = int(data.decode_u32(offset + 4))
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fixed_uv_count = int(data.decode_u32(offset + 8))
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offset += 12
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if not _valid_counts(fixed_vertex_count, fixed_index_count, fixed_uv_count):
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last_error = "invalid v1 geometry counts %d" % geometry_index
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return {}
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var frames: Array = []
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for frame_index in frame_count:
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var changed := 0
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var visibility := 1.0
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var vertex_count := fixed_vertex_count
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var index_count := fixed_index_count
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var uv_count := fixed_uv_count
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if version == 2:
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if not _has(data, offset, 17): # byte + float + 3 x DWORD
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last_error = "truncated v2 frame header %d/%d" % [geometry_index, frame_index]
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return {}
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changed = int(data.decode_u8(offset))
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offset += 1
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visibility = float(data.decode_float(offset))
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offset += 4
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vertex_count = int(data.decode_u32(offset))
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offset += 4
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index_count = int(data.decode_u32(offset))
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offset += 4
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uv_count = int(data.decode_u32(offset))
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offset += 4
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else:
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if not _has(data, offset, 4):
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last_error = "truncated v1 frame header %d/%d" % [geometry_index, frame_index]
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return {}
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visibility = float(data.decode_float(offset))
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offset += 4
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if not _valid_counts(vertex_count, index_count, uv_count):
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last_error = "invalid frame counts %d/%d" % [geometry_index, frame_index]
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return {}
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var bytes_needed := vertex_count * 12 + index_count * 4 + uv_count * 8 + index_count * 4
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if not _has(data, offset, bytes_needed):
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last_error = "truncated frame data %d/%d" % [geometry_index, frame_index]
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return {}
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var positions := PackedVector3Array()
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positions.resize(vertex_count)
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for i in vertex_count:
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var base := offset + i * 12
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positions[i] = Vector3(
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float(data.decode_float(base)),
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float(data.decode_float(base + 4)),
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float(data.decode_float(base + 8))) * 0.01
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offset += vertex_count * 12
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var indices := PackedInt32Array()
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indices.resize(index_count)
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for i in index_count:
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indices[i] = int(data.decode_s32(offset + i * 4))
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offset += index_count * 4
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var uvs := PackedVector2Array()
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uvs.resize(uv_count)
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for i in uv_count:
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var base := offset + i * 8
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uvs[i] = Vector2(
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float(data.decode_float(base)),
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-float(data.decode_float(base + 4)))
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offset += uv_count * 8
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var texture_indices := PackedInt32Array()
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texture_indices.resize(index_count)
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for i in index_count:
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texture_indices[i] = int(data.decode_s32(offset + i * 4))
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offset += index_count * 4
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# EffectMesh.cpp renders a non-indexed TPTVertex array. Keep the
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# same order so a frame is directly usable as a TriangleList.
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var render_vertices := PackedVector3Array()
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var render_uvs := PackedVector2Array()
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render_vertices.resize(index_count)
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render_uvs.resize(index_count)
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for i in index_count:
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var vi := indices[i]
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var ti := texture_indices[i]
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if vi < 0 or vi >= positions.size() or ti < 0 or ti >= uvs.size():
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last_error = "index out of range %d/%d" % [geometry_index, frame_index]
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return {}
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render_vertices[i] = positions[vi]
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render_uvs[i] = uvs[ti]
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frames.append({
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"changed": changed,
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"visibility": visibility,
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"vertex_count": vertex_count,
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"index_count": index_count,
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"uv_count": uv_count,
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"vertices": render_vertices,
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"uvs": render_uvs,
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})
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geometries.append({
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"name": name,
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"diffuse": diffuse,
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"frames": frames,
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})
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return {
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"version": version,
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"geometry_count": geometry_count,
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"frame_count": frame_count,
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"geometries": geometries,
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}
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func _valid_counts(vertex_count: int, index_count: int, uv_count: int) -> bool:
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return vertex_count >= 0 and index_count >= 0 and uv_count >= 0 \
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and vertex_count <= MAX_ELEMENTS and index_count <= MAX_ELEMENTS \
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and uv_count <= MAX_ELEMENTS
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func _has(data: PackedByteArray, offset: int, length: int) -> bool:
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return offset >= 0 and length >= 0 and offset <= data.size() - length
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func _fixed_string(data: PackedByteArray, offset: int, length: int) -> String:
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var out := ""
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for i in length:
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var value := int(data[offset + i])
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if value == 0:
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break
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out += String.chr(value)
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return out
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