Need help importing colors to the object

[LTU-Eimantas]

Sorry if this might sound childish but how should I import colors on object? When I trying to do 15th example (15.camera_motion_car_blur.py) I am getting everything (shines, blur, etc), but no colors. But if I open online 3D Viewer or MS 3D viewer I can clearly see all of them. My pc spec: Ubuntu 18.04 LTS Intel® Core™ i7-10750H CPU @ 2.60GHz × 12 GeForce GTX 1050 3GB 16GB RAM

[natevm]

Hi @LTU-Eimantas!

Could you verify that your version of nvisii is fully up to date? This is a known bug that should have been fixed in the latest nvisii release.

[LTU-Eimantas]

I am using NVISII 1.1.72 version with nVidia 460 drivers

[TontonTremblay]

My way around this problem (in the earlier version) was to manually set the colors on the entities returned by the function.

This is an example in loading an obj file from mecabrick.com

def load_lego_object(path):
    """
        This loads a single entity from a lego model taken from 
        mecabrick.com. 

        path: path to the head folder for the lego scene 

        return: a list of visii entity names
    """
    models = glob.glob(path+"/*.obj")

    if len(models) == 0:
        raise('no models')

    obj_to_load = models[0]    
    name_model = models[0].replace(path,'').replace('.obj','').replace(' ',"_")

    print("loading:",name_model)
    name = path.split('/')[-2]

    # load the materials
    with open(obj_to_load.replace('obj','mtl')) as f:
        lines = f.readlines()
    colours = {}
    name_material = None

    for line in lines:
        # print(line)
        color = None
        texture = None
        transparency = 1

        if 'newmtl' in line:
            # print(line)
            name_material = line.split(' ')[-1].replace('\n','')
            # print(name_material)
            colours[name_material] = {
                "texture_path":None
            } 

        if 'Kd' in line and not 'png' in line:
            kd =  eval(",".join(line.split(' ')[1:]))
            # print(name_material,kd)
            # colours[name_material] = [kd[0],kd[1],kd[2]]
            colours[name_material]['rgb'] = [kd[0],kd[1],kd[2]]

        if 'map_Kd' in line:
            texture_name =  line.split(' ')[-1].replace('\n','')
            # print(name_material,kd)
            # colours[name_material] = texture_name
            colours[name_material]['texture_path'] = texture_name

        if 'd' == line.split(' ')[0]:
            value_transparency = line.split(' ')[-1]
            if not value_transparency == '1':
                colours[name_material+'_transparency'] = float(value_transparency)
            colours[name_material]['alpha'] = float(value_transparency)

        # print(line)

    toys = visii.import_scene(obj_to_load,
        visii.vec3(0,0,0),
        visii.vec3(0.01,0.01,0.01), # the scale
        visii.angleAxis(1.57, visii.vec3(1,0,0))
        )

    for material in toys.materials:
        if 'DefaultMaterial' == material.get_name():
            continue

        rgb = colours[material.get_name()]['rgb']
        material.set_base_color(visii.vec3(float(rgb[0]),float(rgb[1]),float(rgb[2])))

        if colours[material.get_name()]['alpha']<1:
            material.set_alpha(colours[material.get_name()]['alpha'])

        material.set_roughness(0)
        material.set_metallic(0)
        material.set_transmission(0)
        material.set_specular(0.33)

    # find the entity names
    with open(obj_to_load) as f:
        lines = f.readlines()

    entity_names = []

    for line in lines: 
        if line[0] == 'o':
            name = line.split(' ')[-1].replace("\n","")
            entity_names.append(f"{name}_{name}")
    # print(entity_names)

    for entity_name in entity_names:

        # print(entity_name)
        if entity_name == 'camera':
            continue
        # print('get')

        entity = visii.entity.get(entity_name)
        # print('get_mat')

        mat_name = entity.get_material().get_name()
        if colours[mat_name]['alpha']<1:
            entity.set_visibility(shadow = False)
            mat = entity.get_material()
            mat.set_transmission(1)
            mat.set_ior(0.98)
            # print(entity.get_name())
            # entity.set_visibility(False)

    return entity_names

[natevm]

@TontonTremblay can you reproduce this issue with the motion blurred car locally on your system?

[LTU-Eimantas]

Sorry, guys it was fault from my end. I haven't seen that the docer file which I compile use 1.0 version and not 1.1 of NVISII (RUN pip3 install nvisii==1.0.70). I am quite new with when it comes to Docer so I though it use the same version as system. Maybe you should mentioned that you have to do change NVISII version in the docer file.

[TontonTremblay]

Thank you for pointing that out. I removed it from the docker file. Happy to answer further questioning you might have.