Improve blendspan criteria stuff.

This allows blend textures to be used for mesh transparency without
having to fiddle around too much. It was also a stab at fixing some
regressions in the MOUL engine around decals, but that bit failed,
sadly.

korman/exporter/material.py

@@ -429,8 +429,6 @@ class MaterialConverter:
         if canStencil:
             hsgmat.compFlags |= hsGMaterial.kCompNeedsBlendChannel
             state.blendFlags |= hsGMatState.kBlendAlpha | hsGMatState.kBlendAlphaMult | hsGMatState.kBlendNoTexColor
-            if slot.texture.type == "BLEND":
-                state.clampFlags |= hsGMatState.kClampTexture
             state.ZFlags |= hsGMatState.kZNoZWrite
             layer.ambient = hsColorRGBA(1.0, 1.0, 1.0, 1.0)
         elif blend_flags:
@@ -453,6 +451,8 @@ class MaterialConverter:
             layer.specularPower = 1.0
 
         texture = slot.texture
+        if texture.type == "BLEND":
+            hsgmat.compFlags |= hsGMaterial.kCompNeedsBlendChannel
 
         # Apply custom layer properties
         wantBumpmap = bm is not None and slot.use_map_normal
@@ -788,6 +788,11 @@ class MaterialConverter:
         pass
 
     def _export_texture_type_blend(self, bo, layer, slot):
+        state = layer.state
+        state.blendFlags |= hsGMatState.kBlendAlpha | hsGMatState.kBlendAlphaMult | hsGMatState.kBlendNoTexColor
+        state.clampFlags |= hsGMatState.kClampTexture
+        state.ZFlags |= hsGMatState.kZNoZWrite
+
         # This has been separated out because other things may need alpha blend textures.
         texture = slot.texture
         self.export_alpha_blend(texture.progression, texture.use_flip_axis, layer)

korman/exporter/mesh.py

@@ -39,11 +39,13 @@ class _RenderLevel:
     _MAJOR_SHIFT = 28
     _MINOR_MASK = ((1 << _MAJOR_SHIFT) - 1)
 
-    def __init__(self, bo, hsgmat, pass_index, blendSpan=False):
+    def __init__(self, bo, hsgmat, pass_index, blend_span=False):
         self.level = 0
-
-        if blendSpan:
-            self.major = self.MAJOR_DEFAULT
+        if pass_index > 0:
+            self.major = self.MAJOR_FRAMEBUF
+            self.minor = pass_index * 4
+        else:
+            self.major = self.MAJOR_BLEND if blend_span else self.MAJOR_OPAQUE
 
         # We use the blender material's pass index (which we stashed in the hsGMaterial) to increment
         # the render pass, just like it says...
@@ -74,10 +76,9 @@ class _DrawableCriteria:
         self.criteria = 0
 
         if self.blend_span:
-            for mod in bo.plasma_modifiers.modifiers:
-                if mod.requires_face_sort:
+            if self._face_sort_allowed(bo):
                 self.criteria |= plDrawable.kCritSortFaces
-                if mod.requires_span_sort:
+            if self._span_sort_allowed(bo):
                 self.criteria |= plDrawable.kCritSortSpans
         self.render_level = _RenderLevel(bo, hsgmat, pass_index, self.blend_span)
 
@@ -92,6 +93,16 @@ class _DrawableCriteria:
     def __hash__(self):
         return hash(self.render_level) ^ hash(self.blend_span) ^ hash(self.criteria)
 
+    def _face_sort_allowed(self, bo):
+        # For now, only test the modifiers
+        # This will need to be tweaked further for GUIs...
+        return not any((i.no_face_sort for i in bo.plasma_modifiers.modifiers))
+
+    def _span_sort_allowed(self, bo):
+        # For now, only test the modifiers
+        # This will need to be tweaked further for GUIs...
+        return not any((i.no_face_sort for i in bo.plasma_modifiers.modifiers))
+
     @property
     def span_type(self):
         if self.blend_span:

korman/properties/modifiers/base.py

@@ -37,19 +37,19 @@ class PlasmaModifierProperties(bpy.types.PropertyGroup):
         return self.id_data.name
 
     @property
-    def requires_actor(self):
-        """Indicates if this modifier requires the object to be a movable actor"""
+    def no_face_sort(self):
+        """Indicates that the geometry's faces should never be sorted by the engine"""
         return False
 
     @property
-    def requires_face_sort(self):
-        """Indicates that the geometry's faces must be sorted by the engine"""
+    def no_span_sort(self):
+        """Indicates that the geometry's Spans should never be sorted with those from other
+           Drawables that will render in the same pass"""
         return False
 
     @property
-    def requires_span_sort(self):
-        """Indicates that the geometry's Spans must be sorted with those from other Drawables that
-           will render in the same pass"""
+    def requires_actor(self):
+        """Indicates if this modifier requires the object to be a movable actor"""
         return False
 
     # Guess what?

korman/properties/modifiers/render.py

@@ -114,10 +114,6 @@ class PlasmaFadeMod(PlasmaModifierProperties):
             mod.farOpaq = self.far_opaq
             mod.farTrans = self.far_trans
 
-    @property
-    def requires_span_sort(self):
-        return True
-
 
 class PlasmaFollowMod(idprops.IDPropObjectMixin, PlasmaModifierProperties):
     pl_id = "followmod"