| import torch |
| import numpy as np |
| from tqdm import tqdm |
| import utils3d |
| from PIL import Image |
|
|
| from ..renderers import MeshRenderer, VoxelRenderer, PbrMeshRenderer |
| from ..representations import Mesh, Voxel, MeshWithPbrMaterial, MeshWithVoxel |
| from .random_utils import sphere_hammersley_sequence |
|
|
|
|
| def yaw_pitch_r_fov_to_extrinsics_intrinsics(yaws, pitchs, rs, fovs): |
| is_list = isinstance(yaws, list) |
| if not is_list: |
| yaws = [yaws] |
| pitchs = [pitchs] |
| if not isinstance(rs, list): |
| rs = [rs] * len(yaws) |
| if not isinstance(fovs, list): |
| fovs = [fovs] * len(yaws) |
| extrinsics = [] |
| intrinsics = [] |
| for yaw, pitch, r, fov in zip(yaws, pitchs, rs, fovs): |
| fov = torch.deg2rad(torch.tensor(float(fov))).cuda() |
| yaw = torch.tensor(float(yaw)).cuda() |
| pitch = torch.tensor(float(pitch)).cuda() |
| orig = torch.tensor([ |
| torch.sin(yaw) * torch.cos(pitch), |
| torch.cos(yaw) * torch.cos(pitch), |
| torch.sin(pitch), |
| ]).cuda() * r |
| extr = utils3d.torch.extrinsics_look_at(orig, torch.tensor([0, 0, 0]).float().cuda(), torch.tensor([0, 0, 1]).float().cuda()) |
| intr = utils3d.torch.intrinsics_from_fov_xy(fov, fov) |
| extrinsics.append(extr) |
| intrinsics.append(intr) |
| if not is_list: |
| extrinsics = extrinsics[0] |
| intrinsics = intrinsics[0] |
| return extrinsics, intrinsics |
|
|
|
|
| def get_renderer(sample, **kwargs): |
| if isinstance(sample, (MeshWithPbrMaterial, MeshWithVoxel)): |
| renderer = PbrMeshRenderer() |
| renderer.rendering_options.resolution = kwargs.get('resolution', 512) |
| renderer.rendering_options.near = kwargs.get('near', 1) |
| renderer.rendering_options.far = kwargs.get('far', 100) |
| renderer.rendering_options.ssaa = kwargs.get('ssaa', 2) |
| renderer.rendering_options.peel_layers = kwargs.get('peel_layers', 8) |
| elif isinstance(sample, Mesh): |
| renderer = MeshRenderer() |
| renderer.rendering_options.resolution = kwargs.get('resolution', 512) |
| renderer.rendering_options.near = kwargs.get('near', 1) |
| renderer.rendering_options.far = kwargs.get('far', 100) |
| renderer.rendering_options.ssaa = kwargs.get('ssaa', 2) |
| renderer.rendering_options.chunk_size = kwargs.get('chunk_size', None) |
| elif isinstance(sample, Voxel): |
| renderer = VoxelRenderer() |
| renderer.rendering_options.resolution = kwargs.get('resolution', 512) |
| renderer.rendering_options.near = kwargs.get('near', 0.1) |
| renderer.rendering_options.far = kwargs.get('far', 10.0) |
| renderer.rendering_options.ssaa = kwargs.get('ssaa', 2) |
| else: |
| raise ValueError(f'Unsupported sample type: {type(sample)}') |
| return renderer |
|
|
|
|
| def render_frames(sample, extrinsics, intrinsics, options={}, verbose=True, **kwargs): |
| renderer = get_renderer(sample, **options) |
| rets = {} |
| for j, (extr, intr) in tqdm(enumerate(zip(extrinsics, intrinsics)), total=len(extrinsics), desc='Rendering', disable=not verbose): |
| res = renderer.render(sample, extr, intr, **kwargs) |
| for k, v in res.items(): |
| if k not in rets: rets[k] = [] |
| if v.dim() == 2: v = v[None].repeat(3, 1, 1) |
| rets[k].append(np.clip(v.detach().cpu().numpy().transpose(1, 2, 0) * 255, 0, 255).astype(np.uint8)) |
| return rets |
|
|
|
|
| def render_video(sample, resolution=1024, bg_color=(0, 0, 0), num_frames=120, r=2, fov=40, **kwargs): |
| yaws = -torch.linspace(0, 2 * 3.1415, num_frames) + np.pi/2 |
| pitch = 0.25 + 0.5 * torch.sin(torch.linspace(0, 2 * 3.1415, num_frames)) |
| yaws = yaws.tolist() |
| pitch = pitch.tolist() |
| extrinsics, intrinsics = yaw_pitch_r_fov_to_extrinsics_intrinsics(yaws, pitch, r, fov) |
| return render_frames(sample, extrinsics, intrinsics, {'resolution': resolution, 'bg_color': bg_color}, **kwargs) |
|
|
|
|
| def render_multiview(sample, resolution=512, nviews=30): |
| r = 2 |
| fov = 40 |
| cams = [sphere_hammersley_sequence(i, nviews) for i in range(nviews)] |
| yaws = [cam[0] for cam in cams] |
| pitchs = [cam[1] for cam in cams] |
| extrinsics, intrinsics = yaw_pitch_r_fov_to_extrinsics_intrinsics(yaws, pitchs, r, fov) |
| res = render_frames(sample, extrinsics, intrinsics, {'resolution': resolution, 'bg_color': (0, 0, 0)}) |
| return res['color'], extrinsics, intrinsics |
|
|
|
|
| def render_snapshot(samples, resolution=512, bg_color=(0, 0, 0), offset=(-16 / 180 * np.pi, 20 / 180 * np.pi), r=10, fov=8, nviews=4, **kwargs): |
| yaw = np.linspace(0, 2 * np.pi, nviews, endpoint=False) |
| yaw_offset = offset[0] |
| yaw = [y + yaw_offset for y in yaw] |
| pitch = [offset[1] for _ in range(nviews)] |
| extrinsics, intrinsics = yaw_pitch_r_fov_to_extrinsics_intrinsics(yaw, pitch, r, fov) |
| return render_frames(samples, extrinsics, intrinsics, {'resolution': resolution, 'bg_color': bg_color}, **kwargs) |
|
|
|
|
| def make_pbr_vis_frames(result, resolution=1024): |
| num_frames = len(result['shaded']) |
| frames = [] |
| for i in range(num_frames): |
| shaded = Image.fromarray(result['shaded'][i]) |
| normal = Image.fromarray(result['normal'][i]) |
| base_color = Image.fromarray(result['base_color'][i]) |
| metallic = Image.fromarray(result['metallic'][i]) |
| roughness = Image.fromarray(result['roughness'][i]) |
| alpha = Image.fromarray(result['alpha'][i]) |
| shaded = shaded.resize((resolution, resolution)) |
| normal = normal.resize((resolution, resolution)) |
| base_color = base_color.resize((resolution//2, resolution//2)) |
| metallic = metallic.resize((resolution//2, resolution//2)) |
| roughness = roughness.resize((resolution//2, resolution//2)) |
| alpha = alpha.resize((resolution//2, resolution//2)) |
| row1 = np.concatenate([shaded, normal], axis=1) |
| row2 = np.concatenate([base_color, metallic, roughness, alpha], axis=1) |
| frame = np.concatenate([row1, row2], axis=0) |
| frames.append(frame) |
| return frames |
|
|
