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# SPDX-License-Identifier: Apache-2.0
# Copyright 2018-2021 The glTF-Blender-IO authors.
from io_scene_gltf2.blender.exp.gltf2_blender_gather_cache import cached
from ..com.gltf2_blender_extras import generate_extras
from io_scene_gltf2.io.com import gltf2_io
from io_scene_gltf2.io.exp.gltf2_io_user_extensions import export_user_extensions
import bpy
import math
@cached
def gather_camera(blender_camera, export_settings):
if not __filter_camera(blender_camera, export_settings):
return None
camera = gltf2_io.Camera(
extensions=__gather_extensions(blender_camera, export_settings),
extras=__gather_extras(blender_camera, export_settings),
name=__gather_name(blender_camera, export_settings),
orthographic=__gather_orthographic(blender_camera, export_settings),
perspective=__gather_perspective(blender_camera, export_settings),
type=__gather_type(blender_camera, export_settings)
)
export_user_extensions('gather_camera_hook', export_settings, camera, blender_camera)
return camera
def __filter_camera(blender_camera, export_settings):
return bool(__gather_type(blender_camera, export_settings))
def __gather_extensions(blender_camera, export_settings):
return None
def __gather_extras(blender_camera, export_settings):
if export_settings['gltf_extras']:
return generate_extras(blender_camera)
return None
def __gather_name(blender_camera, export_settings):
return blender_camera.name
def __gather_orthographic(blender_camera, export_settings):
if __gather_type(blender_camera, export_settings) == "orthographic":
orthographic = gltf2_io.CameraOrthographic(
extensions=None,
extras=None,
xmag=None,
ymag=None,
zfar=None,
znear=None
)
orthographic.xmag = blender_camera.ortho_scale
orthographic.ymag = blender_camera.ortho_scale
orthographic.znear = blender_camera.clip_start
orthographic.zfar = blender_camera.clip_end
return orthographic
return None
def __gather_perspective(blender_camera, export_settings):
if __gather_type(blender_camera, export_settings) == "perspective":
perspective = gltf2_io.CameraPerspective(
aspect_ratio=None,
extensions=None,
extras=None,
yfov=None,
zfar=None,
znear=None
)
width = bpy.context.scene.render.pixel_aspect_x * bpy.context.scene.render.resolution_x
height = bpy.context.scene.render.pixel_aspect_y * bpy.context.scene.render.resolution_y
perspective.aspect_ratio = width / height
if width >= height:
if blender_camera.sensor_fit != 'VERTICAL':
perspective.yfov = 2.0 * math.atan(math.tan(blender_camera.angle * 0.5) / perspective.aspect_ratio)
else:
perspective.yfov = blender_camera.angle
else:
if blender_camera.sensor_fit != 'HORIZONTAL':
perspective.yfov = blender_camera.angle
else:
perspective.yfov = 2.0 * math.atan(math.tan(blender_camera.angle * 0.5) / perspective.aspect_ratio)
perspective.znear = blender_camera.clip_start
perspective.zfar = blender_camera.clip_end
return perspective
return None
def __gather_type(blender_camera, export_settings):
if blender_camera.type == 'PERSP':
return "perspective"
elif blender_camera.type == 'ORTHO':
return "orthographic"
return None
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