Rock Generator 2.8.0: Cavity in Vertex-Farben (texturfreier Weg)
Idee kam vom User: die Steine ueber "smart materials" in UE loesen statt ueber gebackene Texturen. Prozedurales Noise/Voronoi im Shader waere zu teuer (laeuft pro Pixel), aber der Kern der Idee traegt - deshalb dieser Weg: Neue Option "Cavity in Vertex-Farben": schreibt Cavity/AO plus optionalen Hoehen-Verlauf in das Farb-Attribut "Cavity" (vertex_color_dirt + eigene Nachbearbeitung fuer Staerke und Verlauf). Das Material braucht damit KEINE Textur: Base Color = Farbton x VertexColor, dazu Kantenlicht und Schattentint. Gegenueber Triplanar sitzen die dunklen Fugen dadurch auf den ECHTEN Kanten des Meshes statt darueberzuschweben - genau das passiert in der Genshin-Referenz. Verifiziert: Attribut wird angelegt, Wertebereich 0.250..0.947 (echter Kontrast), und es ueberlebt den FBX-Roundtrip UNVERAENDERT (gleicher Bereich nach Import). Regler: Cavity-Staerke, Hoehen-Verlauf, Weichzeichnen. Neuer Test tests/test_vertex_cavity.py. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Claude Opus 4.8
@@ -40,6 +40,15 @@ Abgestimmt auf `A:\eco\EcoGame` (UE 5.8). Kurzfassung:
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Platten), `Fugenbreite` (klein = harte Fuge, flache Platte), `Platten flach`
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(1 = Flaeche nahezu einfarbig). Ein dichtes Zellmuster ueber die ganze
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Oberflaeche erschlaegt die Form und passt NICHT zu diesem Look.
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- **Texturfreie Alternative — Vertex-Cavity:** Statt zu baken laesst sich die
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Cavity in die **Vertex-Farben** schreiben (Attribut `Cavity`, ueberlebt den
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FBX-Roundtrip verlustfrei — gemessen 0.250..0.947 vor und nach dem Import).
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Das Material braucht dann **keine Textur**:
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`Base Color = Farbton x VertexColor`, dazu Kantenlicht (Fresnel) und
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Schattentint. Vorteil gegenueber Triplanar: die dunklen Fugen sitzen auf den
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ECHTEN Kanten des Meshes statt darueberzuschweben. Grenze: die Aufloesung
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haengt an der Vertex-Dichte — fuer flaechige Platten reicht sie, fuer feine
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Struktur nicht.
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- 1024 px reicht fuer stylized Formen.
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- Tileable (4D-Torus) passt zum triplanar mappenden Master-Material.
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@@ -1,7 +1,7 @@
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schema_version = "1.0.0"
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id = "stylized_rock_generator"
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version = "2.7.0"
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version = "2.8.0"
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name = "Stylized Rock Generator"
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tagline = "Batch-Generator fuer stylized Rocks mit UE5-Export"
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maintainer = "D4rkst3r"
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Vendored
+4
-4
@@ -7,7 +7,7 @@
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"id": "stylized_rock_generator",
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"name": "Stylized Rock Generator",
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"tagline": "Batch-Generator fuer stylized Rocks mit UE5-Export",
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"version": "2.7.0",
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"version": "2.8.0",
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"type": "add-on",
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"maintainer": "D4rkst3r",
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"license": [
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@@ -23,9 +23,9 @@
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"Mesh",
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"Modeling"
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],
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"archive_url": "./stylized_rock_generator-2.7.0.zip",
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"archive_size": 18091,
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"archive_hash": "sha256:2a3b20b6a915271e10b5246b77fc89361cab3dab2ead032aff4e4cd3526ccf33"
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"archive_url": "./stylized_rock_generator-2.8.0.zip",
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"archive_size": 19166,
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"archive_hash": "sha256:4c05d56bd4962caf7ce2bddd086ecbf0f6e34eb7fc045f35770f8e6d5267b7ad"
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},
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{
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"schema_version": "1.0.0",
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@@ -1,7 +1,7 @@
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bl_info = {
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"name": "Stylized Rock Generator",
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"author": "D4rkst3r",
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"version": (2, 7, 0),
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"version": (2, 8, 0),
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"blender": (4, 2, 0),
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"location": "View3D > Sidebar > Rock Gen",
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"description": (
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@@ -60,6 +60,7 @@ PRESET_KEYS = (
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"shading_mode", "autosmooth_angle",
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"randomize_shape", "noise_scale_max", "displace_strength_max", "nonuniform_scale",
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"flatten_bottom", "flatten_ratio", "set_origin_bottom", "keep_size",
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"bake_vertex_cavity", "cavity_strength", "cavity_blur", "cavity_gradient",
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"use_class_size", "base_size",
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)
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@@ -453,6 +454,65 @@ def _apply_random_transform(context, obj, settings, rng):
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bpy.ops.object.transform_apply(location=False, rotation=True, scale=True)
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def _bake_vertex_cavity(context, obj, settings):
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"""Cavity + Hoehen-Verlauf in die VERTEX-FARBEN backen.
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Warum: das Material braucht damit KEINE Textur. Base Color = Farbton x
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Vertex-Farbe, dazu Kantenlicht und Schattentint im Shader - genau der
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Genshin-Aufbau. Ausserdem sitzen die dunklen Fugen auf den ECHTEN Kanten
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des Meshes, statt per Triplanar darueberzuschweben.
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Aufloesung haengt an der Vertex-Dichte; fuer flaechige Platten reicht das,
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fuer feine Struktur nicht (dann Textur nehmen).
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"""
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me = obj.data
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layer = me.color_attributes.get("Cavity")
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if layer is None:
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layer = me.color_attributes.new(name="Cavity", type='BYTE_COLOR', domain='CORNER')
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me.color_attributes.active_color = layer
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me.color_attributes.render_color_index = me.color_attributes.find("Cavity")
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_deselect_all(context)
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context.view_layer.objects.active = obj
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obj.select_set(True)
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try:
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bpy.ops.paint.vertex_color_set(color=(1.0, 1.0, 1.0, 1.0))
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except RuntimeError:
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pass
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try:
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bpy.ops.paint.vertex_color_dirt(
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blur_strength=1.0,
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blur_iterations=settings.cavity_blur,
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clean_angle=3.14159,
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dirt_angle=0.0,
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dirt_only=False,
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normalize=True,
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)
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except RuntimeError as exc:
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raise RockGenError("Vertex-Cavity fehlgeschlagen: %s" % exc)
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# Staerke regeln + optionaler Hoehen-Verlauf (unten dunkler, wie in der
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# Referenz). Beides direkt auf den Farbwerten, das ist schnell genug.
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zs = [v.co.z for v in me.vertices]
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if not zs:
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return
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zmin, zmax = min(zs), max(zs)
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span = max(zmax - zmin, 1e-6)
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amt = settings.cavity_strength
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grad = settings.cavity_gradient
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data = layer.data
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for poly in me.polygons:
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for li in poly.loop_indices:
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vi = me.loops[li].vertex_index
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c = data[li].color
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val = 1.0 - (1.0 - c[0]) * amt # Cavity abschwaechen
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if grad > 0.0:
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t = (me.vertices[vi].co.z - zmin) / span
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val *= (1.0 - grad) + grad * (0.35 + 0.65 * t)
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val = max(0.0, min(1.0, val))
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data[li].color = (val, val, val, 1.0)
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def _apply_shading(context, obj, settings):
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"""Setzt den Shading-Look: FLAT (facettiert), SMOOTH oder AUTO (nach Winkel)."""
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_deselect_all(context)
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@@ -607,6 +667,8 @@ def make_one_rock(context, settings, index, batch_count=1):
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_apply_hardsurface(context, obj, settings)
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_apply_random_transform(context, obj, settings, rng)
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_apply_shading(context, obj, settings)
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if settings.bake_vertex_cavity:
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_bake_vertex_cavity(context, obj, settings)
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if settings.set_origin_bottom:
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_set_origin_bottom(context, obj)
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if settings.assign_material:
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@@ -730,6 +792,27 @@ class RockGenSettings(PropertyGroup):
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description="Setzt den Origin auf die Unterseiten-Mitte (sauberes Aufstellen in UE)",
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)
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# --- Vertex-Cavity (texturfreier Weg) ---
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bake_vertex_cavity: BoolProperty(
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name="Cavity in Vertex-Farben", default=False,
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description=("Backt Cavity/AO in die Vertex-Farben (Attribut 'Cavity'). "
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"Das Material braucht dann KEINE Textur: Base Color = Farbton "
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"x Vertex-Farbe, Rest ueber Kantenlicht und Schattentint"),
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)
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cavity_strength: FloatProperty(
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name="Cavity-Staerke", default=0.7, min=0.0, max=1.0,
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description="0 = alles weiss, 1 = volle Abdunklung in den Vertiefungen",
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)
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cavity_blur: IntProperty(
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name="Weichzeichnen", default=1, min=0, max=5,
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description="Glaettet den Cavity-Verlauf ueber benachbarte Vertices",
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)
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cavity_gradient: FloatProperty(
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name="Hoehen-Verlauf", default=0.35, min=0.0, max=1.0,
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description=("Dunkelt den Stein nach unten hin ab (wie in der Referenz). "
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"0 = aus"),
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)
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# --- Material ---
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assign_material: BoolProperty(
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name="Material zuweisen", default=False,
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@@ -1567,6 +1650,15 @@ class VIEW3D_PT_rock_generator(Panel):
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sub.prop(settings, "lod_count")
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sub.prop(settings, "lod_ratio_step")
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box = layout.box()
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box.label(text="Vertex-Cavity (ohne Textur)")
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box.prop(settings, "bake_vertex_cavity")
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sub = box.column(align=True)
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sub.enabled = settings.bake_vertex_cavity
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sub.prop(settings, "cavity_strength")
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sub.prop(settings, "cavity_gradient")
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sub.prop(settings, "cavity_blur")
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box = layout.box()
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box.label(text="Material")
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box.prop(settings, "assign_material")
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@@ -0,0 +1,45 @@
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import bpy, sys, importlib.util, os, tempfile
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spec=importlib.util.spec_from_file_location("srg", r"A:\eco\stylized_rock_generator\stylized_rock_generator.py")
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r=importlib.util.module_from_spec(spec); sys.modules["srg"]=r; spec.loader.exec_module(r)
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try: r.unregister()
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except Exception: pass
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r.register()
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fails=[]
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for o in list(bpy.data.objects): bpy.data.objects.remove(o,do_unlink=True)
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s=bpy.context.scene.rock_gen_settings
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s.batch_count=1; s.subsurf_levels=4; s.use_modal=False
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s.shading_mode='FLAT'; s.bake_vertex_cavity=True
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s.name_prefix="Fels"; s.name_form="A"; s.name_class='M'
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res=bpy.ops.object.generate_rocks_batch()
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obs=[o for o in bpy.context.scene.objects if o.type=='MESH']
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ob=obs[0]
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me=ob.data
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names=[a.name for a in me.color_attributes]
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print("FARB-ATTRIBUTE:", names)
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if "Cavity" not in names: fails.append("kein_attribut")
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else:
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vals=[d.color[0] for d in me.color_attributes["Cavity"].data]
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vals.sort()
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print("CAVITY min=%.3f p10=%.3f median=%.3f max=%.3f (n=%d)"
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% (vals[0], vals[len(vals)//10], vals[len(vals)//2], vals[-1], len(vals)))
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if vals[-1]-vals[0] < 0.05: fails.append("kein_kontrast")
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# Faceted?
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sm=sum(1 for p in me.polygons if p.use_smooth)
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print("Shading: smooth=%d / flat=%d" % (sm, len(me.polygons)-sm))
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# FBX-Roundtrip: ueberleben die Vertex-Farben?
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tmp=tempfile.mkdtemp(); fp=os.path.join(tmp,"cav.fbx")
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for o in bpy.context.selected_objects: o.select_set(False)
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ob.select_set(True); bpy.context.view_layer.objects.active=ob
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bpy.ops.export_scene.fbx(filepath=fp, use_selection=True, colors_type='SRGB',
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mesh_smooth_type='FACE', use_triangles=True)
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for o in list(bpy.data.objects): bpy.data.objects.remove(o,do_unlink=True)
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bpy.ops.import_scene.fbx(filepath=fp)
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imp=[o for o in bpy.data.objects if o.type=='MESH'][0]
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inames=[a.name for a in imp.data.color_attributes]
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print("NACH FBX-ROUNDTRIP:", inames, "Tris=%d" % sum(len(p.vertices)-2 for p in imp.data.polygons))
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if not inames: fails.append("fbx_verliert_farben")
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else:
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iv=[d.color[0] for d in imp.data.color_attributes[0].data]
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print(" Wertebereich nach Import: %.3f .. %.3f" % (min(iv), max(iv)))
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r.unregister()
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print("ERGEBNIS:", "ALLE CHECKS OK" if not fails else "FEHLER: "+", ".join(fails))
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