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dnacalib_clear_blend_shapes.py
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dnacalib_clear_blend_shapes.py
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"""
This example demonstrates how to remove all blend shape data from a DNA.
IMPORTANT: You have to setup the environment before running this example. Please refer to the 'Environment setup' section in README.md.
- usage in command line:
python dnacalib_clear_blend_shapes.py
mayapy dnacalib_clear_blend_shapes.py
- usage in Maya:
1. copy whole content of this file to Maya Script Editor
2. change value of ROOT_DIR to absolute path of dna_calibration, e.g. `c:/dna_calibration` in Windows or `/home/user/dna_calibration`. Important:
Use `/` (forward slash), because Maya uses forward slashes in path.
- customization:
- change CHARACTER_NAME to Taro, or the name of a custom DNA file placed in /data/dna_files
Expected: Script will generate Ada_output.dna in OUTPUT_DIR from original Ada.dna.
NOTE: If OUTPUT_DIR does not exist, it will be created.
"""
from os import makedirs
from os import path as ospath
# if you use Maya, use absolute path
ROOT_DIR = f"{ospath.dirname(ospath.abspath(__file__))}/..".replace("\\", "/")
OUTPUT_DIR = f"{ROOT_DIR}/output"
CHARACTER_NAME = "Ada"
DATA_DIR = f"{ROOT_DIR}/data"
CHARACTER_DNA = f"{DATA_DIR}/dna_files/{CHARACTER_NAME}.dna"
OUTPUT_DNA = f"{OUTPUT_DIR}/{CHARACTER_NAME}_output.dna"
from dna import DataLayer_All, FileStream, Status, BinaryStreamReader, BinaryStreamWriter
from dnacalib import (
DNACalibDNAReader,
ClearBlendShapesCommand
)
def load_dna(path):
stream = FileStream(path, FileStream.AccessMode_Read, FileStream.OpenMode_Binary)
reader = BinaryStreamReader(stream, DataLayer_All)
reader.read()
if not Status.isOk():
status = Status.get()
raise RuntimeError(f"Error loading DNA: {status.message}")
return reader
def save_dna(reader, path):
stream = FileStream(path, FileStream.AccessMode_Write, FileStream.OpenMode_Binary)
writer = BinaryStreamWriter(stream)
writer.setFrom(reader)
writer.write()
if not Status.isOk():
status = Status.get()
raise RuntimeError(f"Error saving DNA: {status.message}")
def validate_geometry(dna):
mesh_count = dna.getMeshCount()
for mesh_index in range(mesh_count):
bs_tgt_count = dna.getBlendShapeTargetCount(mesh_index)
for bs_tgt_index in range(bs_tgt_count):
bs_tgt_delta_count = dna.getBlendShapeTargetDeltaCount(mesh_index, bs_tgt_index)
if bs_tgt_delta_count != 0:
raise RuntimeError("Blend shape target deltas not removed properly!")
def validate_animation_data(dna):
bs_channel_lods = dna.getBlendShapeChannelLODs()
bs_channel_input_indices = dna.getBlendShapeChannelInputIndices()
bs_channel_output_indices = dna.getBlendShapeChannelOutputIndices()
if len(bs_channel_lods) != dna.getLODCount():
raise RuntimeError("Blend shape animation data not removed properly! Number of blend shape LODs does not match LOD count!")
for lod in bs_channel_lods:
if lod != 0:
raise RuntimeError("Blend shape animation data not removed properly!")
if (len(bs_channel_input_indices) != 0) or (len(bs_channel_output_indices) != 0):
raise RuntimeError("Blend shape animation data not removed properly!")
def calibrate_dna(input_path, output_path):
dna = load_dna(input_path)
# Copies DNA contents and will serve as input/output parameter to commands
calibrated = DNACalibDNAReader(dna)
mesh_count = calibrated.getMeshCount()
print(f"Number of meshes: {mesh_count}")
for mesh_index in range(mesh_count):
bs_tgt_count = calibrated.getBlendShapeTargetCount(mesh_index)
print(f"Number of blendshape targets for mesh {calibrated.getMeshName(mesh_index)}({mesh_index}): {bs_tgt_count}")
for bs_tgt_index in range(bs_tgt_count):
bs_tgt_delta_count = calibrated.getBlendShapeTargetDeltaCount(mesh_index, bs_tgt_index)
print(f"Number of blendshape target deltas for mesh {calibrated.getMeshName(mesh_index)}({mesh_index}), blend shape target {bs_tgt_index}: {bs_tgt_delta_count}")
print(f"Blend shape channel LODs: {calibrated.getBlendShapeChannelLODs()}")
print(f"Blend shape channel input indices: {calibrated.getBlendShapeChannelInputIndices()}")
print(f"Blend shape channel output indices: {calibrated.getBlendShapeChannelOutputIndices()}")
# Clears all blend shapes
command = ClearBlendShapesCommand()
print("\n\nClearing blend shape data...\n\n")
# Modifies calibrated DNA in-place
command.run(calibrated)
validate_geometry(calibrated)
validate_animation_data(calibrated)
print(f"Number of meshes: {mesh_count}")
for mesh_index in range(mesh_count):
bs_tgt_count = calibrated.getBlendShapeTargetCount(mesh_index)
print(f"Number of blendshape targets for mesh {calibrated.getMeshName(mesh_index)}({mesh_index}): {bs_tgt_count}")
for bs_tgt_index in range(bs_tgt_count):
bs_tgt_delta_count = calibrated.getBlendShapeTargetDeltaCount(mesh_index, bs_tgt_index)
print(f"Number of blendshape target deltas for mesh {calibrated.getMeshName(mesh_index)}({mesh_index}), blend shape target {bs_tgt_index}: {bs_tgt_delta_count}")
bs_channel_lods = dna.getBlendShapeChannelLODs()
bs_channel_input_indices = dna.getBlendShapeChannelInputIndices()
bs_channel_output_indices = dna.getBlendShapeChannelOutputIndices()
print(f"Blend shape channel LODs: {bs_channel_lods}")
print(f"Blend shape channel input indices: {bs_channel_input_indices}")
print(f"Blend shape channel output indices: {bs_channel_output_indices}")
print("\n\nSuccessfully cleared blend shape data.")
print("Saving DNA...")
save_dna(calibrated, output_path)
print("Done.")
if __name__ == "__main__":
makedirs(OUTPUT_DIR, exist_ok=True)
calibrate_dna(CHARACTER_DNA, OUTPUT_DNA)