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import os |
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import torch |
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import numpy as np |
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import cv2 |
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import matplotlib.pyplot as plt |
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import glob |
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import pickle |
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import pyrender |
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import trimesh |
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import smplx |
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from pathlib import Path |
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from shapely import geometry |
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from smplx import SMPL as _SMPL |
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from smplx.utils import SMPLOutput as ModelOutput |
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from scipy.spatial.transform.rotation import Rotation as RRR |
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class Renderer: |
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""" |
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Renderer used for visualizing the SMPL model |
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Code adapted from https://github.com/vchoutas/smplify-x |
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""" |
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def __init__(self, vertices, focal_length=5000, img_res=(224,224), faces=None): |
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self.renderer = pyrender.OffscreenRenderer(viewport_width=img_res[0], |
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viewport_height=img_res[1], |
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point_size=2.0) |
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self.focal_length = focal_length |
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self.camera_center = [img_res[0] // 2, img_res[1] // 2] |
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self.faces = faces |
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if torch.cuda.is_available(): |
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self.device = torch.device("cuda") |
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else: |
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self.device = torch.device("cpu") |
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self.rot = trimesh.transformations.rotation_matrix(np.radians(180), [1, 0, 0]) |
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minx, miny, minz = vertices.min(axis=(0, 1)) |
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maxx, maxy, maxz = vertices.max(axis=(0, 1)) |
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minx = minx - 0.5 |
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maxx = maxx + 0.5 |
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minz = minz - 0.5 |
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maxz = maxz + 0.5 |
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floor = geometry.Polygon([[minx, minz], [minx, maxz], [maxx, maxz], [maxx, minz]]) |
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self.floor = trimesh.creation.extrude_polygon(floor, 1e-5) |
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self.floor.visual.face_colors = [0, 0, 0, 0.2] |
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self.floor.apply_transform(self.rot) |
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self.floor_pose =np.array([[ 1, 0, 0, 0], |
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[ 0, np.cos(np.pi / 2), -np.sin(np.pi / 2), miny], |
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[ 0, np.sin(np.pi / 2), np.cos(np.pi / 2), 0], |
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[ 0, 0, 0, 1]]) |
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c = -np.pi / 6 |
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self.camera_pose = [[ 1, 0, 0, (minx+maxx)/2], |
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[ 0, np.cos(c), -np.sin(c), 1.5], |
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[ 0, np.sin(c), np.cos(c), max(4, minz+(1.5-miny)*2, (maxx-minx))], |
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[ 0, 0, 0, 1] |
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] |
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def __call__(self, vertices, camera_translation): |
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floor_render = pyrender.Mesh.from_trimesh(self.floor, smooth=False) |
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material = pyrender.MetallicRoughnessMaterial( |
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metallicFactor=0.1, |
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alphaMode='OPAQUE', |
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baseColorFactor=(0.658, 0.214, 0.0114, 0.2)) |
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mesh = trimesh.Trimesh(vertices, self.faces) |
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mesh.apply_transform(self.rot) |
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mesh = pyrender.Mesh.from_trimesh(mesh, material=material) |
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camera = pyrender.PerspectiveCamera(yfov=(np.pi / 3.0)) |
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light = pyrender.DirectionalLight(color=[1,1,1], intensity=350) |
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spot_l = pyrender.SpotLight(color=np.ones(3), intensity=300.0, |
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innerConeAngle=np.pi/16, outerConeAngle=np.pi/6) |
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point_l = pyrender.PointLight(color=np.ones(3), intensity=300.0) |
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scene = pyrender.Scene(bg_color=(1.,1.,1.,0.8),ambient_light=(0.4, 0.4, 0.4)) |
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scene.add(floor_render, pose=self.floor_pose) |
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scene.add(mesh, 'mesh') |
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light_pose = np.eye(4) |
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light_pose[:3, 3] = np.array([0, -1, 1]) |
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scene.add(light, pose=light_pose) |
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light_pose[:3, 3] = np.array([0, 1, 1]) |
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scene.add(light, pose=light_pose) |
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light_pose[:3, 3] = np.array([1, 1, 2]) |
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scene.add(light, pose=light_pose) |
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scene.add(camera, pose=self.camera_pose) |
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flags = pyrender.RenderFlags.RGBA | pyrender.RenderFlags.SHADOWS_DIRECTIONAL |
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color, rend_depth = self.renderer.render(scene, flags=flags) |
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return color |
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class SMPLRender(): |
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def __init__(self, SMPL_MODEL_DIR): |
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if torch.cuda.is_available(): |
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self.device = torch.device("cuda") |
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else: |
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self.device = torch.device("cpu") |
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self.smpl = smplx.create(Path(SMPL_MODEL_DIR).parent, model_type="smpl", gender="neutral", ext="npz", batch_size=1).to(self.device) |
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self.pred_camera_t = [] |
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self.focal_length = 110 |
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def init_renderer(self, res, smpl_param, is_headroot=False): |
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poses = smpl_param['pred_pose'] |
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pred_rotmats = [] |
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for pose in poses: |
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if pose.size==72: |
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pose = pose.reshape(-1,3) |
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pose = RRR.from_rotvec(pose).as_matrix() |
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pose = pose.reshape(1,24,3,3) |
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pred_rotmats.append(torch.from_numpy(pose.astype(np.float32)[None]).to(self.device)) |
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pred_rotmat = torch.cat(pred_rotmats, dim=0) |
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pred_betas = torch.from_numpy(smpl_param['pred_shape'].reshape(1, 10).astype(np.float32)).to(self.device) |
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pred_root = torch.tensor(smpl_param['pred_root'].reshape(-1, 3).astype(np.float32),device=self.device) |
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smpl_output = self.smpl(betas=pred_betas, body_pose=pred_rotmat[:, 1:],transl=pred_root, global_orient=pred_rotmat[:, :1], pose2rot=False) |
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self.vertices = smpl_output.vertices.detach().cpu().numpy() |
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pred_root = pred_root[0] |
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if is_headroot: |
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pred_root = pred_root - smpl_output.joints[0,12].detach().cpu().numpy() |
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self.pred_camera_t.append(pred_root) |
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self.renderer = Renderer(vertices=self.vertices, focal_length=self.focal_length, |
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img_res=(res[1], res[0]), faces=self.smpl.faces) |
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def render(self, index): |
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renderImg = self.renderer(self.vertices[index, ...], self.pred_camera_t) |
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return renderImg |
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