moved num samples to instant ngp config (#304)

nerfactory/configs/base.py

@@ -251,6 +251,7 @@ class InstantNGPModelConfig(ModelConfig):
     enable_collider: bool = False
     field_implementation: Literal["torch", "tcnn"] = "tcnn"  # torch, tcnn, ...
     loss_coefficients: Dict[str, float] = to_immutable_dict({"rgb_loss": 1.0})
+    num_samples: int = 1024  # instead of course/fine samples
 
 
 @dataclass

nerfactory/models/instant_ngp.py

@@ -68,7 +68,7 @@ class NGPModel(Model):
 
     def populate_misc_modules(self):
         # samplers
-        self.sampler = NGPSpacedSampler(num_samples=1024, density_field=self.density_field)
+        self.sampler = NGPSpacedSampler(num_samples=self.config.num_samples, density_field=self.density_field)
 
         # losses
         self.rgb_loss = MSELoss()