fix(lookup tables): Adding lookup table changes to explorers

-- Adding to fix issue #143

pan3d/explorers/contour.py

@@ -16,6 +16,7 @@
     vtkLoopSubdivisionFilter,
 )
 from vtkmodules.vtkFiltersCore import vtkAssignAttribute
+from vtkmodules.vtkCommonCore import vtkLookupTable
 
 # VTK factory initialization
 from vtkmodules.vtkInteractionStyle import vtkInteractorStyleSwitch  # noqa
@@ -31,7 +32,7 @@
 from trame.widgets import vuetify3 as v3, html
 
 from pan3d.utils.convert import to_float, to_image
-from pan3d.utils.presets import apply_preset, COLOR_PRESETS
+from pan3d.utils.presets import set_preset, PRESETS
 
 from pan3d.ui.vtk_view import Pan3DView
 from pan3d.ui.css import base, preview
@@ -88,6 +89,8 @@ def __init__(self, server=None, local_rendering=None):
     # -------------------------------------------------------------------------
 
     def _setup_vtk(self):
+        self.lut = vtkLookupTable()
+
         self.renderer = vtkRenderer(background=(0.8, 0.8, 0.8))
         self.interactor = vtkRenderWindowInteractor()
         self.render_window = vtkRenderWindow(off_screen_rendering=1)
@@ -118,6 +121,7 @@ def _setup_vtk(self):
             input_connection=self.bands.output_port,
             scalar_visibility=1,
             interpolate_scalars_before_mapping=1,
+            lookup_table=self.lut,
         )
         self.mapper.SelectColorArray("scalars")
         self.mapper.SetScalarModeToUsePointFieldData()
@@ -366,7 +370,7 @@ def _build_ui(self, **kwargs):
                         placeholder="Color Preset",
                         prepend_inner_icon="mdi-palette",
                         v_model=("color_preset", "Cool to Warm"),
-                        items=("color_presets", COLOR_PRESETS),
+                        items=("color_presets", list(PRESETS.keys())),
                         hide_details=True,
                         density="compact",
                         flat=True,
@@ -463,8 +467,8 @@ def _on_update_color_range(
     ):
         if self.last_preset != color_preset:
             self.last_preset = color_preset
-            apply_preset(self.actor, [color_min, color_max], color_preset)
-            self.state.preset_img = to_image(self.actor.mapper.lookup_table, 255)
+            set_preset(self.lut, color_preset)
+            self.state.preset_img = to_image(self.lut, 255)
 
         self.mapper.SetScalarRange(color_min, color_max)
         self.bands.GenerateValues(nb_contours, [color_min, color_max])

pan3d/explorers/globe.py

@@ -11,6 +11,7 @@
 from vtkmodules.vtkFiltersGeometry import vtkDataSetSurfaceFilter
 from vtkmodules.vtkInteractionWidgets import vtkOrientationMarkerWidget
 from vtkmodules.vtkRenderingAnnotation import vtkAxesActor
+from vtkmodules.vtkCommonCore import vtkLookupTable
 
 import json
 import traceback
@@ -25,7 +26,7 @@
 from pan3d.xarray.algorithm import vtkXArrayRectilinearSource
 
 from pan3d.utils.convert import update_camera, to_image, to_float
-from pan3d.utils.presets import apply_preset
+from pan3d.utils.presets import set_preset
 
 from pan3d.ui.vtk_view import Pan3DView, Pan3DScalarBar
 from pan3d.ui.preview import SummaryToolbar, ControlPanel
@@ -135,6 +136,8 @@ def _setup_vtk(self):
             get_continent_outlines,
         )
 
+        self.lut = vtkLookupTable()
+
         self.globe = get_globe()
         self.texture = get_globe_texture()
         self.gmapper = vtkPolyDataMapper(input_data_object=self.globe)
@@ -156,7 +159,9 @@ def _setup_vtk(self):
             input_connection=self.dglobe.output_port
         )
 
-        self.mapper = vtkPolyDataMapper(input_connection=self.geometry.output_port)
+        self.mapper = vtkPolyDataMapper(
+            input_connection=self.geometry.output_port, lookup_table=self.lut
+        )
         self.actor = vtkActor(mapper=self.mapper, visibility=0)
 
         self.interactor.Initialize()
@@ -306,10 +311,13 @@ def _on_color_preset(
     ):
         color_min = float(color_min)
         color_max = float(color_max)
-        color = nan_colors[nan_color]
         self.mapper.SetScalarRange(color_min, color_max)
-        apply_preset(self.actor, [color_min, color_max], color_preset, color)
-        self.state.preset_img = to_image(self.actor.mapper.lookup_table, 255)
+
+        set_preset(self.lut, color_preset)
+        self.state.preset_img = to_image(self.lut, 255)
+
+        color = nan_colors[nan_color]
+        self.lut.SetNanColor(color)
 
         self.ctrl.view_update()
 

pan3d/explorers/slicer.py

@@ -2,6 +2,8 @@
 import json
 from pathlib import Path
 
+from vtkmodules.vtkCommonCore import vtkLookupTable
+
 from vtkmodules.vtkRenderingCore import (
     vtkRenderer,
     vtkRenderWindowInteractor,
@@ -11,6 +13,7 @@
     vtkPolyDataMapper,
     vtkTextProperty,
 )
+
 from vtkmodules.vtkRenderingAnnotation import (
     vtkScalarBarActor,
 )
@@ -38,7 +41,7 @@
 
 from pan3d.ui.vtk_view import Pan3DView
 from pan3d.ui.common import NumericField
-from pan3d.utils.presets import update_preset, use_preset, COLOR_PRESETS
+from pan3d.utils.presets import set_preset, PRESETS
 
 
 @TrameApp()
@@ -113,6 +116,9 @@ def _setup_vtk(self, source=None, import_state=None):
 
         color_range = ds.point_data[self.state.color_by].GetRange()
 
+        # Create lookup table
+        self.lut = vtkLookupTable()
+
         # Build rendering pipeline
         self.renderer = vtkRenderer()
         self.interactor = vtkRenderWindowInteractor()
@@ -125,7 +131,7 @@ def _setup_vtk(self, source=None, import_state=None):
         cutter.SetCutFunction(plane)
         cutter.input_connection = self.source.output_port
         slice_actor = vtkActor()
-        slice_mapper = vtkDataSetMapper()
+        slice_mapper = vtkDataSetMapper(lookup_table=self.lut)
         slice_mapper.SetInputConnection(cutter.GetOutputPort())
         slice_mapper.SetScalarRange(*color_range)
         slice_mapper.SelectColorArray(self.state.color_by)
@@ -139,7 +145,7 @@ def _setup_vtk(self, source=None, import_state=None):
 
         outline = vtkOutlineFilter()
         outline_actor = vtkActor()
-        outline_mapper = vtkPolyDataMapper()
+        outline_mapper = vtkPolyDataMapper(lookup_table=self.lut)
         outline.input_connection = self.source.output_port
         outline_mapper.SetInputConnection(outline.GetOutputPort())
         outline_actor.SetMapper(outline_mapper)
@@ -149,7 +155,7 @@ def _setup_vtk(self, source=None, import_state=None):
         self.outline_mapper = outline_mapper
 
         data_actor = vtkActor()
-        data_mapper = vtkDataSetMapper()
+        data_mapper = vtkDataSetMapper(lookup_table=self.lut)
         data_mapper.input_connection = self.source.output_port
         data_mapper.SetScalarRange(*color_range)
         data_actor.SetMapper(data_mapper)
@@ -159,7 +165,7 @@ def _setup_vtk(self, source=None, import_state=None):
         self.data_mapper = data_mapper
 
         sbar_actor = vtkScalarBarActor()
-        sbar_actor.SetLookupTable(self.slice_mapper.GetLookupTable())
+        sbar_actor.SetLookupTable(self.lut)
         sbar_actor.SetMaximumHeightInPixels(600)
         sbar_actor.SetMaximumWidthInPixels(100)
         sbar_actor.SetTitleRatio(0.2)
@@ -294,15 +300,19 @@ def _on_colormap_change(self, cmap, **_):
         Performs all the steps necessary to visualize correct data when the
         color map is updated
         """
-        use_preset(self.slice_actor, self.data_actor, self.sbar_actor, cmap)
+        set_preset(self.lut, cmap)
         self.ctrl.view_update()
 
     @change("logscale")
     def _on_log_scale_change(self, logscale, **_):
         """
         Performs all the steps necessary when user toggles log scale for color map
         """
-        update_preset(self.slice_actor, self.sbar_actor, logscale)
+        if logscale:
+            self.lut.SetScaleToLog10()
+        else:
+            self.lut.SetScaleToLinear()
+
         self.ctrl.view_update()
 
     def _set_view_2D(self, axis):
@@ -660,8 +670,8 @@ def _build_ui(self, *args, **kwargs):
                             )
                         v3.VSelect(
                             label="Preset",
-                            v_model=("cmap", COLOR_PRESETS[0]),
-                            items=("colormaps", COLOR_PRESETS),
+                            v_model=("cmap", "Fast"),
+                            items=("colormaps", list(PRESETS.keys())),
                             outlined=True,
                             **style,
                         )

pan3d/utils/presets.py

@@ -2,7 +2,7 @@
 from pathlib import Path
 import numpy as np
 
-from vtkmodules.vtkRenderingCore import vtkColorTransferFunction, vtkActor
+from vtkmodules.vtkRenderingCore import vtkColorTransferFunction
 from vtkmodules.vtkCommonCore import vtkLookupTable
 
 PRESETS = {
@@ -75,107 +75,3 @@ def set_preset(lut: vtkLookupTable, preset_name: str, n_colors=255):
         rgb = colors.GetColor(x)
         lut.SetTableValue(i, *rgb)
     lut.Build()
-
-
-# --------------------------------------------------------
-
-hsv_colors = {
-    "Greyscale": {
-        "Hue": (0.0, 0.0),
-        "Saturation": (0.0, 0.0),
-        "Range": (0.0, 1.0),
-    },
-    "Inv Greyscale": {
-        "Hue": (0.0, 0.666),
-        "Saturation": (0.0, 0.0),
-        "Range": (1.0, 0.0),
-    },
-}
-
-rgb_colors = {}
-try:
-    data = json.loads(Path(__file__).with_name("presets.json").read_text())
-    for cmap in data:
-        name = cmap["Name"]
-        srgb = np.array(cmap["RGBPoints"])
-        tfunc = vtkColorTransferFunction()
-        for arr in np.split(srgb, len(srgb) / 4):
-            tfunc.AddRGBPoint(arr[0], arr[1], arr[2], arr[3])
-        info = {"TF": tfunc, "Range": (srgb[0], srgb[-4])}
-        rgb_colors[name] = info
-except Exception as e:
-    print("Error loading diverging color maps : ", e)
-
-
-def convert_tfunc_to_lut(tfunc: vtkColorTransferFunction, tfrange):
-    lut = vtkLookupTable()
-    lut.SetNumberOfTableValues(256)
-    tflen = tfrange[1] - tfrange[0]
-    for i in range(256):
-        t = tfrange[0] + tflen * i / 255
-        rgb = list(tfunc.GetColor(t))
-        lut.SetTableValue(i, rgb[0], rgb[1], rgb[2])
-    lut.Build()
-    return lut
-
-
-def apply_preset(actor: vtkActor, srange, preset: str, nan_color=[0, 0, 0, 0]) -> None:
-    if preset in list(hsv_colors.keys()):
-        lut = vtkLookupTable()
-        lut.SetNumberOfTableValues(256)
-        mapper = actor.GetMapper()
-        mapper.SetLookupTable(lut)
-        preset = hsv_colors[preset]
-        hue = preset["Hue"]
-        sat = preset["Saturation"]
-        rng = preset["Range"]
-        lut.SetHueRange(hue[0], hue[1])
-        lut.SetSaturationRange(sat[0], sat[1])
-        lut.SetValueRange(rng[0], rng[1])
-        lut.SetNanColor(nan_color)
-        lut.Build()
-    elif preset in list(rgb_colors.keys()):
-        info = rgb_colors[preset]
-        tfunc = info["TF"]
-        tfrange = info["Range"]
-        lut = convert_tfunc_to_lut(tfunc, tfrange)
-        lut.SetNanColor(nan_color)
-        mapper = actor.GetMapper()
-        mapper.SetLookupTable(lut)
-        mapper.SetScalarRange(srange[0], srange[1])
-
-
-def use_preset(sactor: vtkActor, dactor: vtkActor, sbar: vtkActor, preset: str) -> None:
-    """
-    Given the slice, data, and scalar bar actor, applies the provided preset
-    and updates the actors and the scalar bar
-    """
-    srange = sactor.GetMapper().GetScalarRange()
-    drange = dactor.GetMapper().GetScalarRange()
-    actors = [sactor, dactor]
-    ranges = [srange, drange]
-    for actor, range in zip(actors, ranges):
-        apply_preset(actor, range, preset)
-    sactor.GetMapper().SetScalarRange(srange[0], srange[1])
-    dactor.GetMapper().SetScalarRange(drange[0], drange[1])
-    sbar.SetLookupTable(sactor.GetMapper().GetLookupTable())
-
-
-def update_preset(actor: vtkActor, sbar: vtkActor, logcale: bool) -> None:
-    """
-    Given an actor, scalar bar, and the option for whether to use log scale,
-    make changes to the lookup table for the actor, and update the scalar bar
-    """
-    lut = actor.GetMapper().GetLookupTable()
-    if logcale:
-        lut.SetScaleToLog10()
-    else:
-        lut.SetScaleToLinear()
-    lut.Build()
-    sbar.SetLookupTable(lut)
-
-
-COLOR_PRESETS = [
-    *list(hsv_colors.keys()),
-    *list(rgb_colors.keys()),
-]