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# SPDX-License-Identifier: Apache-2.0
# Copyright 2018-2021 The glTF-Blender-IO authors.
from math import sin, cos
import numpy as np
from io_scene_gltf2.io.com import gltf2_io_constants
def texture_transform_blender_to_gltf(mapping_transform):
"""
Converts the offset/rotation/scale from a Mapping node applied in Blender's
UV space to the equivalent KHR_texture_transform.
"""
offset = mapping_transform.get('offset', [0, 0])
rotation = mapping_transform.get('rotation', 0)
scale = mapping_transform.get('scale', [1, 1])
return {
'offset': [
offset[0] - scale[1] * sin(rotation),
1 - offset[1] - scale[1] * cos(rotation),
],
'rotation': rotation,
'scale': [scale[0], scale[1]],
}
def texture_transform_gltf_to_blender(texture_transform):
"""
Converts a KHR_texture_transform into the equivalent offset/rotation/scale
for a Mapping node applied in Blender's UV space.
"""
offset = texture_transform.get('offset', [0, 0])
rotation = texture_transform.get('rotation', 0)
scale = texture_transform.get('scale', [1, 1])
return {
'offset': [
offset[0] + scale[1] * sin(rotation),
1 - offset[1] - scale[1] * cos(rotation),
],
'rotation': rotation,
'scale': [scale[0], scale[1]],
}
def get_target(property):
return {
"delta_location": "translation",
"delta_rotation_euler": "rotation",
"location": "translation",
"rotation_axis_angle": "rotation",
"rotation_euler": "rotation",
"rotation_quaternion": "rotation",
"scale": "scale",
"value": "weights"
}.get(property)
def get_component_type(attribute_component_type):
return {
"INT8": gltf2_io_constants.ComponentType.Float,
"BYTE_COLOR": gltf2_io_constants.ComponentType.UnsignedShort,
"FLOAT2": gltf2_io_constants.ComponentType.Float,
"FLOAT_COLOR": gltf2_io_constants.ComponentType.Float,
"FLOAT_VECTOR": gltf2_io_constants.ComponentType.Float,
"FLOAT_VECTOR_4": gltf2_io_constants.ComponentType.Float,
"INT": gltf2_io_constants.ComponentType.Float, # No signed Int in glTF accessor
"FLOAT": gltf2_io_constants.ComponentType.Float,
"BOOLEAN": gltf2_io_constants.ComponentType.Float
}.get(attribute_component_type)
def get_data_type(attribute_component_type):
return {
"INT8": gltf2_io_constants.DataType.Scalar,
"BYTE_COLOR": gltf2_io_constants.DataType.Vec4,
"FLOAT2": gltf2_io_constants.DataType.Vec2,
"FLOAT_COLOR": gltf2_io_constants.DataType.Vec4,
"FLOAT_VECTOR": gltf2_io_constants.DataType.Vec3,
"FLOAT_VECTOR_4": gltf2_io_constants.DataType.Vec4,
"INT": gltf2_io_constants.DataType.Scalar,
"FLOAT": gltf2_io_constants.DataType.Scalar,
"BOOLEAN": gltf2_io_constants.DataType.Scalar,
}.get(attribute_component_type)
def get_data_length(attribute_component_type):
return {
"INT8": 1,
"BYTE_COLOR": 4,
"FLOAT2": 2,
"FLOAT_COLOR": 4,
"FLOAT_VECTOR": 3,
"FLOAT_VECTOR_4": 4,
"INT": 1,
"FLOAT": 1,
"BOOLEAN": 1
}.get(attribute_component_type)
def get_numpy_type(attribute_component_type):
return {
"INT8": np.float32,
"BYTE_COLOR": np.float32,
"FLOAT2": np.float32,
"FLOAT_COLOR": np.float32,
"FLOAT_VECTOR": np.float32,
"FLOAT_VECTOR_4": np.float32,
"INT": np.float32, #signed integer are not supported by glTF
"FLOAT": np.float32,
"BOOLEAN": np.float32
}.get(attribute_component_type)
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