| import torch | |
| import numpy as np | |
| from tqdm import tqdm | |
| import utils3d | |
| import json | |
| from ..renderers import OctreeRenderer, GaussianRenderer, MeshRenderer | |
| from ..representations import Octree, Gaussian, MeshExtractResult | |
| 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, Octree): | |
| renderer = OctreeRenderer() | |
| renderer.rendering_options.resolution = kwargs.get('resolution', 512) | |
| renderer.rendering_options.near = kwargs.get('near', 0.8) | |
| renderer.rendering_options.far = kwargs.get('far', 1.6) | |
| renderer.rendering_options.bg_color = kwargs.get('bg_color', (0, 0, 0)) | |
| renderer.rendering_options.ssaa = kwargs.get('ssaa', 4) | |
| renderer.pipe.primitive = sample.primitive | |
| elif isinstance(sample, Gaussian): | |
| renderer = GaussianRenderer() | |
| renderer.rendering_options.resolution = kwargs.get('resolution', 512) | |
| renderer.rendering_options.near = kwargs.get('near', 0.8) | |
| renderer.rendering_options.far = kwargs.get('far', 1.6) | |
| renderer.rendering_options.bg_color = kwargs.get('bg_color', (0, 0, 0)) | |
| renderer.rendering_options.ssaa = kwargs.get('ssaa', 1) | |
| renderer.pipe.kernel_size = kwargs.get('kernel_size', 0.1) | |
| renderer.pipe.use_mip_gaussian = True | |
| elif isinstance(sample, MeshExtractResult): | |
| 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', 4) | |
| else: | |
| raise ValueError(f'Unsupported sample type: {type(sample)}') | |
| return renderer | |
| def render_frames(sample, extrinsics, intrinsics, options={}, colors_overwrite=None, verbose=True, **kwargs): | |
| renderer = get_renderer(sample, **options) | |
| rets = {} | |
| for j, (extr, intr) in tqdm(enumerate(zip(extrinsics, intrinsics)), desc='Rendering', disable=not verbose): | |
| if isinstance(sample, MeshExtractResult): | |
| res = renderer.render(sample, extr, intr) | |
| if 'normal' not in rets: rets['normal'] = [] | |
| rets['normal'].append(np.clip(res['normal'].detach().cpu().numpy().transpose(1, 2, 0) * 255, 0, 255).astype(np.uint8)) | |
| else: | |
| res = renderer.render(sample, extr, intr, colors_overwrite=colors_overwrite) | |
| if 'color' not in rets: rets['color'] = [] | |
| if 'depth' not in rets: rets['depth'] = [] | |
| rets['color'].append(np.clip(res['color'].detach().cpu().numpy().transpose(1, 2, 0) * 255, 0, 255).astype(np.uint8)) | |
| if 'percent_depth' in res: | |
| rets['depth'].append(res['percent_depth'].detach().cpu().numpy()) | |
| elif 'depth' in res: | |
| rets['depth'].append(res['depth'].detach().cpu().numpy()) | |
| else: | |
| rets['depth'].append(None) | |
| return rets | |
| def render_video(sample, resolution=512, bg_color=(0, 0, 0), num_frames=300, r=2, fov=40, **kwargs): | |
| yaws = torch.linspace(0, 2 * 3.1415, num_frames) | |
| 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 |