created two needed tests for my PR and updated frustum_helper.py

api/src/opentrons/protocol_engine/state/frustum_helpers.py

@@ -13,6 +13,9 @@
 from opentrons_shared_data.labware.labware_definition import InnerWellGeometry
 
 
+SectionsType = Union[CircularBoundedSection, RectangularBoundedSection]
+
+
 def reject_unacceptable_heights(
     potential_heights: List[float], max_height: float
 ) -> float:
@@ -33,9 +36,7 @@ def reject_unacceptable_heights(
     return valid_heights[0]
 
 
-def get_cross_section_area(
-    bounded_section: Union[CircularBoundedSection, RectangularBoundedSection]
-) -> float:
+def get_cross_section_area(bounded_section: SectionsType) -> float:
     """Find the shape of a cross-section and calculate the area appropriately."""
     if bounded_section["shape"] == "circular":
         cross_section_area = cross_section_area_circular(bounded_section["diameter"])
@@ -242,11 +243,11 @@ def get_well_volumetric_capacity(
 
     if is_rectangular_frusta_list(sorted_frusta):
         for f, next_f in get_boundary_pairs(sorted_frusta):
-            top_cross_section_width = next_f["xDimension"]
-            top_cross_section_length = next_f["yDimension"]
-            bottom_cross_section_width = f["xDimension"]
-            bottom_cross_section_length = f["yDimension"]
-            frustum_height = next_f["topHeight"] - f["topHeight"]
+            top_cross_section_width = next_f.xDimension
+            top_cross_section_length = next_f.yDimension
+            bottom_cross_section_width = f.xDimension
+            bottom_cross_section_length = f.yDimension
+            frustum_height = next_f.topHeight - f.topHeight
             frustum_volume = volume_from_height_rectangular(
                 target_height=frustum_height,
                 total_frustum_height=frustum_height,
@@ -256,20 +257,20 @@ def get_well_volumetric_capacity(
                 top_width=top_cross_section_width,
             )
 
-            well_volume.append((next_f["topHeight"], frustum_volume))
+            well_volume.append((next_f.topHeight, frustum_volume))
     elif is_circular_frusta_list(sorted_frusta):
         for f, next_f in get_boundary_pairs(sorted_frusta):
-            top_cross_section_radius = next_f["diameter"] / 2.0
-            bottom_cross_section_radius = f["diameter"] / 2.0
-            frustum_height = next_f["topHeight"] - f["topHeight"]
+            top_cross_section_radius = next_f.diameter / 2.0
+            bottom_cross_section_radius = f.diameter / 2.0
+            frustum_height = next_f.topHeight - f.topHeight
             frustum_volume = volume_from_height_circular(
                 target_height=frustum_height,
                 total_frustum_height=frustum_height,
                 bottom_radius=bottom_cross_section_radius,
                 top_radius=top_cross_section_radius,
             )
 
-            well_volume.append((next_f["topHeight"], frustum_volume))
+            well_volume.append((next_f.topHeight, frustum_volume))
     else:
         raise NotImplementedError(
             "Well section with differing boundary shapes not yet implemented."
@@ -278,20 +279,26 @@ def get_well_volumetric_capacity(
 
 
 def height_at_volume_within_section(
-    top_cross_section: Union[CircularBoundedSection, RectangularBoundedSection],
-    bottom_cross_section: Union[CircularBoundedSection, RectangularBoundedSection],
+    top_cross_section: SectionsType,
+    bottom_cross_section: SectionsType,
     target_volume_relative: float,
     frustum_height: float,
 ) -> float:
     """Calculate a height within a bounded section according to geometry."""
-    if top_cross_section["shape"] == bottom_cross_section["shape"] == "circular":
+    if (
+        top_cross_section["shape"] == "circular"
+        and bottom_cross_section["shape"] == "circular"
+    ):
         frustum_height = height_from_volume_circular(
             volume=target_volume_relative,
             top_radius=(top_cross_section["diameter"] / 2),
             bottom_radius=(bottom_cross_section["diameter"] / 2),
             total_frustum_height=frustum_height,
         )
-    elif top_cross_section["shape"] == bottom_cross_section["shape"] == "rectangular":
+    elif (
+        top_cross_section["shape"] == "rectangular"
+        and bottom_cross_section["shape"] == "rectangular"
+    ):
         frustum_height = height_from_volume_rectangular(
             volume=target_volume_relative,
             total_frustum_height=frustum_height,
@@ -308,20 +315,26 @@ def height_at_volume_within_section(
 
 
 def volume_at_height_within_section(
-    top_cross_section: Union[CircularBoundedSection, RectangularBoundedSection],
-    bottom_cross_section: Union[CircularBoundedSection, RectangularBoundedSection],
+    top_cross_section: SectionsType,
+    bottom_cross_section: SectionsType,
     target_height_relative: float,
     frustum_height: float,
 ) -> float:
     """Calculate a volume within a bounded section according to geometry."""
-    if top_cross_section["shape"] == bottom_cross_section["shape"] == "circular":
+    if (
+        top_cross_section["shape"] == "circular"
+        and bottom_cross_section["shape"] == "circular"
+    ):
         frustum_volume = volume_from_height_circular(
             target_height=target_height_relative,
             total_frustum_height=frustum_height,
             bottom_radius=(bottom_cross_section["diameter"] / 2),
             top_radius=(top_cross_section["diameter"] / 2),
         )
-    elif top_cross_section["shape"] == bottom_cross_section["shape"] == "rectangular":
+    elif (
+        top_cross_section["shape"] == "rectangular"
+        and bottom_cross_section["shape"] == "rectangular"
+    ):
         frustum_volume = volume_from_height_rectangular(
             target_height=target_height_relative,
             total_frustum_height=frustum_height,
@@ -347,13 +360,12 @@ def _find_volume_in_partial_frustum(
     partial_volume: Optional[float] = None
     for bottom_cross_section, top_cross_section in get_boundary_pairs(sorted_frusta):
         if (
-            bottom_cross_section["topHeight"]
-            < target_height
-            < top_cross_section["targetHeight"]
+            bottom_cross_section.topHeight < target_height
+            and target_height < top_cross_section.topHeight
         ):
-            relative_target_height = target_height - bottom_cross_section["topHeight"]
+            relative_target_height = target_height - bottom_cross_section.topHeight
             frustum_height = (
-                top_cross_section["topHeight"] - bottom_cross_section["topHeight"]
+                top_cross_section.topHeight - bottom_cross_section.topHeight
             )
             partial_volume = volume_at_height_within_section(
                 top_cross_section=top_cross_section,
@@ -420,7 +432,7 @@ def _find_height_in_partial_frustum(
         bottom_cross_section, top_cross_section = cross_sections
         (bottom_height, bottom_volume), (top_height, top_volume) = capacity
 
-        if bottom_volume < target_volume < top_volume:
+        if bottom_volume < target_volume and target_volume < top_volume:
             relative_target_volume = target_volume - bottom_volume
             frustum_height = top_height - bottom_height
             partial_height = height_at_volume_within_section(

api/src/opentrons/protocol_engine/state/labware.py

@@ -18,7 +18,10 @@
 from opentrons.protocol_engine.state import update_types
 from opentrons_shared_data.deck.types import DeckDefinitionV5
 from opentrons_shared_data.gripper.constants import LABWARE_GRIP_FORCE
-from opentrons_shared_data.labware.labware_definition import LabwareRole
+from opentrons_shared_data.labware.labware_definition import (
+    LabwareRole,
+    InnerWellGeometry,
+)
 from opentrons_shared_data.pipette.types import LabwareUri
 
 from opentrons.types import DeckSlotName, StagingSlotName, MountType
@@ -462,6 +465,29 @@ def get_well_definition(
                 f"{well_name} does not exist in {labware_id}."
             ) from e
 
+    def get_well_geometry(
+        self, labware_id: str, well_name: Optional[str] = None
+    ) -> InnerWellGeometry:
+        """Get a well's inner geometry by labware and well name."""
+        labware_def = self.get_definition(labware_id)
+        if labware_def.innerLabwareGeometry is None:
+            raise errors.InvalidWellDefinitionError(
+                message=f"No innerLabwareGeometry found for labware_id: {labware_id}."
+            )
+        well_def = self.get_well_definition(labware_id, well_name)
+        well_id = well_def.geometryDefinitionId
+        if well_id is None:
+            raise errors.InvalidWellDefinitionError(
+                message=f"No geometryDefinitionId found for well: {well_name} in labware_id: {labware_id}"
+            )
+        else:
+            well_geometry = labware_def.innerLabwareGeometry.get(well_id)
+            if well_geometry is None:
+                raise errors.InvalidWellDefinitionError(
+                    message=f"No innerLabwareGeometry found for well_id: {well_id} in labware_id: {labware_id}"
+                )
+            return well_geometry
+
     def get_well_size(
         self, labware_id: str, well_name: str
     ) -> Tuple[float, float, float]:

api/tests/opentrons/protocol_engine/state/test_frustum_helpers.py

@@ -0,0 +1,24 @@
+"""Test methods that translate well heights and volumes for GeometryView."""
+from opentrons.protocol_engine.state.frustum_helpers import (
+    find_volume_at_well_height,
+    find_height_at_well_volume,
+)
+from ...protocol_runner.test_json_translator import _load_labware_definition_data
+
+
+def test_find_volume_at_well_height() -> None:
+    """Test find_volume_at_well_height."""
+    labware_def = _load_labware_definition_data()
+    assert labware_def.innerLabwareGeometry is not None
+    inner_well_def = labware_def.innerLabwareGeometry["welldefinition1111"]
+    result = find_volume_at_well_height(40.0, inner_well_def)
+    assert result == 1245.833  # use isclose() or something
+
+
+def test_find_height_at_well_volume() -> None:
+    """Test find_height_at_well_volume."""
+    labware_def = _load_labware_definition_data()
+    assert labware_def.innerLabwareGeometry is not None
+    inner_well_def = labware_def.innerLabwareGeometry["welldefinition1111"]
+    result = find_height_at_well_volume(1245.833, inner_well_def)
+    assert result == 40.0  # use isclose() or something