Add the SDL Show/Hide Modifier.

This adds a modifier for the very common PythonFileMods
xAgeSDLBoolShowHude and xAgeSDLIntShowHide. Right now, Korman doesn't
try to parse SDL files, so the variable name and type have to be
specified manually. The benefit to this, however, is the ability to
easily wire up global SDL visibility type features.

korman/exporter/convert.py

@@ -598,6 +598,10 @@ class Exporter:
         else:
             return bpy.context.scene.world.plasma_age.age_name
 
+    @property
+    def age_sdl(self) -> bool:
+        return bpy.context.scene.world.plasma_age.age_sdl
+
     @property
     def dat_only(self):
         return self._op.dat_only

korman/operators/op_ui.py

@@ -77,11 +77,17 @@ class CollectionRemoveOperator(UIOperator, bpy.types.Operator):
     index_prop = StringProperty(name="Index Property",
                                 description="Name of the active element index property",
                                 options=set())
+    manual_index = IntProperty(name="Manual Index",
+                               description="Manual integer index to remove",
+                               options=set())
 
     def execute(self, context):
         props = getattr(context, self.context).path_resolve(self.group_path)
         collection = getattr(props, self.collection_prop)
+        if self.index_prop:
             index = getattr(props, self.index_prop)
+        else:
+            index = self.manual_index
         if len(collection) > index:
             collection.remove(index)
             setattr(props, self.index_prop, index - 1)

korman/plasma_api.py

@@ -14,6 +14,22 @@
 #    along with Korman.  If not, see <http://www.gnu.org/licenses/>.
 
 python_files = {
+    "xAgeSDLBoolShowHide.py": (
+        { "id": 1, "type": "ptAttribString",  "name": "sdlName" },
+        { "id": 2, "type": "ptAttribBoolean", "name": "showOnTrue" },
+        # --- CWE Only Below ---
+        { "id": 3, "type": "ptAttribBoolean", "name": "defaultValue" },
+        { "id": 4, "type": "ptAttribBoolean", "name": "evalOnFirstUpdate "},
+    ),
+
+    "xAgeSDLIntShowHide.py": (
+        { "id": 1, "type": "ptAttribString",  "name": "stringVarName" },
+        { "id": 2, "type": "ptAttribString",  "name": "stringShowStates" },
+        # --- CWE Only Below ---
+        { "id": 3, "type": "ptAttribInt",     "name": "intDefault" },
+        { "id": 4, "type": "ptAttribBoolean", "name": "boolFirstUpdate "},
+    ),
+
     # Provided by all variants of Uru and Myst V
     "xDialogToggle.py": (
         { "id":  1, "type": "ptAttribActivator", "name": "Activate" },

korman/properties/modifiers/logic.py

@@ -15,10 +15,8 @@
 
 from __future__ import annotations
 
-import bmesh
 import bpy
 from bpy.props import *
-import mathutils
 from PyHSPlasma import *
 from typing import *
 
@@ -28,6 +26,11 @@ if TYPE_CHECKING:
     from ...nodes.node_messages import *
     from ...nodes.node_responder import *
 
+from typing import *
+
+if TYPE_CHECKING:
+    from ...exporter import Exporter
+
 from ...addon_prefs import game_versions
 from .base import PlasmaModifierProperties, PlasmaModifierLogicWiz
 from ...exporter import ExportError, utils
@@ -191,6 +194,85 @@ class PlasmaMaintainersMarker(PlasmaModifierProperties):
         return True
 
 
+class PlasmaSDLIntState(bpy.types.PropertyGroup):
+    value: int = IntProperty(
+        name="State Value",
+        description="The object is shown when the SDL variable is set to this value",
+        min=0,
+        soft_max=255,
+        options=set()
+    )
+
+
+class PlasmaSDLShowHide(PlasmaModifierProperties, PlasmaModifierLogicWiz):
+    pl_id = "sdl_showhide"
+
+    bl_category = "Logic"
+    bl_label = "SDL Show/Hide"
+    bl_description = "Show/Hide an object based on an SDL Variable"
+    bl_object_types = {"MESH", "FONT"}
+    bl_icon = "VISIBLE_IPO_OFF"
+
+    sdl_variable: str = StringProperty(
+        name="SDL Variable",
+        description="Name of the SDL variable that controls visibility",
+        options=set()
+    )
+    variable_type: str = EnumProperty(
+        name="Type",
+        description="Data type of the SDL variable",
+        items=[
+            ("bool", "Boolean", "A boolean, used to represent simple on/off for a single state"),
+            ("int", "Integer", "An integer, used to represent multiple state combinations"),
+        ],
+        options=set()
+    )
+
+    int_states = CollectionProperty(type=PlasmaSDLIntState)
+    bool_state: bool = BoolProperty(
+        name="Show When True",
+        description="If checked, show this object when the SDL Variable is TRUE. If not, hide it when TRUE.",
+        default=True,
+        options=set()
+    )
+
+    def created(self):
+        # Ensure at least one SDL int state is precreated for ease of use.
+        # REMEMBER: Blender's "sequences" don't do truthiness correctly...
+        if len(self.int_states) == 0:
+            self.int_states.add()
+
+    def sanity_check(self, exporter: Exporter):
+        if not exporter.age_sdl:
+            raise ExportError(f"'{self.id_data.name}': Age Global SDL is required for the SDL Show/Hide modifier!")
+        if not self.sdl_variable.strip():
+            raise ExportError(f"'{self.id_data.name}': A valid SDL variable is required for the SDL Show/Hide modifier!")
+
+    def logicwiz(self, bo, tree):
+        if self.variable_type == "bool":
+            pfm_node = self._create_standard_python_file_node(tree, "xAgeSDLBoolShowHide.py")
+            self._create_python_attribute(pfm_node, "sdlName", value=self.sdl_variable)
+            self._create_python_attribute(pfm_node, "showOnTrue", value=self.bool_state)
+        elif self.variable_type == "int":
+            pfm_node = self._create_standard_python_file_node(tree, "xAgeSDLIntShowHide.py")
+            self._create_python_attribute(pfm_node, "stringVarName", value=self.sdl_variable)
+            self._create_python_attribute(pfm_node, "stringShowStates", value=",".join(self._states))
+        else:
+            raise RuntimeError()
+
+    @property
+    def key_name(self):
+        if self.variable_type == "bool":
+            return f"cPythBoolShowHide_{self.sdl_variable}_{self.bool_state:d}"
+        elif self.variable_type == "int":
+            return f"cPythIntShowHide_{self.sdl_variable}_{'-'.join(self._states)}"
+
+    @property
+    def _states(self) -> Iterable[str]:
+        """Returns a sorted, deduplicated iterable of the integer (converted to strings) states we should be visible in."""
+        return (str(i) for i in sorted(frozenset((i.value for i in self.int_states))))
+
+
 class PlasmaTelescope(PlasmaModifierProperties, PlasmaModifierLogicWiz):
     pl_id="telescope"
 

korman/ui/modifiers/logic.py

@@ -60,6 +60,43 @@ def maintainersmarker(modifier, layout, context):
     layout.label(text="Positive Y is North, positive Z is up.")
     layout.prop(modifier, "calibration")
 
+def sdl_showhide(modifier: PlasmaSDLShowHide, layout, context):
+    if not context.scene.world.plasma_age.age_sdl:
+        layout.label("This modifier requires Age Global SDL!", icon="ERROR")
+        return
+
+    valid_variable = modifier.sdl_variable.strip()
+    layout.alert = not valid_variable
+    layout.prop(modifier, "sdl_variable")
+    if not valid_variable:
+        layout.label("A valid SDL variable is required!", icon="ERROR")
+    layout.alert = False
+    layout.prop(modifier, "variable_type")
+    layout.separator()
+
+    def setup_collection_operator(op):
+        op.context = "object"
+        op.group_path = modifier.path_from_id()
+        op.collection_prop = "int_states"
+        op.index_prop = ""
+
+    if modifier.variable_type == "bool":
+        layout.prop(modifier, "bool_state")
+    elif modifier.variable_type == "int":
+        layout.label("Show when SDL variable is:")
+        sub = layout.column_flow()
+        for i, state in enumerate(modifier.int_states):
+            row = sub.row(align=True)
+            row.prop(state, "value", text="Value")
+            op = row.operator("ui.plasma_collection_remove", icon="ZOOMOUT", text="")
+            setup_collection_operator(op)
+            op.manual_index = i
+
+        op = layout.operator("ui.plasma_collection_add", icon="ZOOMIN", text="Add State Value")
+        setup_collection_operator(op)
+    else:
+        raise RuntimeError()
+
 def telescope(modifier, layout, context):
     layout.prop(modifier, "clickable_region")
     layout.prop(modifier, "seek_target_object", icon="EMPTY_DATA")