[Bf-extensions-cvs] [2fb1729c] master: Real Snow Updates
Marco
noreply at git.blender.org
Wed Aug 11 14:21:13 CEST 2021
Commit: 2fb1729cab5ad961e65e118f35e2e1420d1fb065
Author: Marco
Date: Wed Aug 11 09:07:41 2021 -0300
Branches: master
https://developer.blender.org/rBA2fb1729cab5ad961e65e118f35e2e1420d1fb065
Real Snow Updates
- make the snow mesh calculation faster (by @drewp)
- fix typos in comments
- bump version to 1.2 and update authors
Resolves T90594
Co-authored-by: Drew Perttula<drewp>
===================================================================
M real_snow.py
===================================================================
diff --git a/real_snow.py b/real_snow.py
index f1091b2d..8f1b9ffd 100644
--- a/real_snow.py
+++ b/real_snow.py
@@ -19,12 +19,12 @@
bl_info = {
"name": "Real Snow",
"description": "Generate snow mesh",
- "author": "Wolf <wolf.art3d at gmail.com>",
- "version": (1, 1),
+ "author": "Marco Pavanello, Drew Perttula",
+ "version": (1, 2),
"blender": (2, 83, 0),
"location": "View 3D > Properties Panel",
- "doc_url": "https://github.com/macio97/Real-Snow",
- "tracker_url": "https://github.com/macio97/Real-Snow/issues",
+ "doc_url": "https://github.com/marcopavanello/real-snow",
+ "tracker_url": "https://github.com/marcopavanello/real-snow/issues",
"support": "COMMUNITY",
"category": "Object",
}
@@ -86,17 +86,17 @@ class SNOW_OT_Create(Operator):
height = context.scene.snow.height
vertices = context.scene.snow.vertices
- # get list of selected objects except non-mesh objects
+ # Get a list of selected objects, except non-mesh objects
input_objects = [obj for obj in context.selected_objects if obj.type == 'MESH']
snow_list = []
- # start UI progress bar
+ # Start UI progress bar
length = len(input_objects)
context.window_manager.progress_begin(0, 10)
- timer=0
+ timer = 0
for obj in input_objects:
- # timer
+ # Timer
context.window_manager.progress_update(timer)
- # duplicate mesh
+ # Duplicate mesh
bpy.ops.object.select_all(action='DESELECT')
obj.select_set(True)
context.view_layer.objects.active = obj
@@ -113,14 +113,14 @@ class SNOW_OT_Create(Operator):
bm_copy = bm_orig.copy()
bm_copy.transform(obj.matrix_world)
bm_copy.normal_update()
- # get faces data
+ # Get faces data
delete_faces(vertices, bm_copy, snow_object)
ballobj = add_metaballs(context, height, snow_object)
context.view_layer.objects.active = snow_object
surface_area = area(snow_object)
snow = add_particles(context, surface_area, height, coverage, snow_object, ballobj)
add_modifiers(snow)
- # place inside collection
+ # Place inside collection
context.view_layer.active_layer_collection = context.view_layer.layer_collection
if "Snow" not in context.scene.collection.children:
coll = bpy.data.collections.new("Snow")
@@ -130,17 +130,17 @@ class SNOW_OT_Create(Operator):
coll.objects.link(snow)
context.view_layer.layer_collection.collection.objects.unlink(snow)
add_material(snow)
- # parent with object
+ # Parent with object
snow.parent = obj
snow.matrix_parent_inverse = obj.matrix_world.inverted()
- # add snow to list
+ # Add snow to list
snow_list.append(snow)
- # update progress bar
+ # Update progress bar
timer += 0.1 / length
- # select created snow meshes
+ # Select created snow meshes
for s in snow_list:
s.select_set(True)
- # end progress bar
+ # End progress bar
context.window_manager.progress_end()
return {'FINISHED'}
@@ -148,7 +148,7 @@ class SNOW_OT_Create(Operator):
def add_modifiers(snow):
bpy.ops.object.transform_apply(location=False, scale=True, rotation=False)
- # decimate the mesh to get rid of some visual artifacts
+ # Decimate the mesh to get rid of some visual artifacts
snow.modifiers.new("Decimate", 'DECIMATE')
snow.modifiers["Decimate"].ratio = 0.5
snow.modifiers.new("Subdiv", "SUBSURF")
@@ -158,21 +158,21 @@ def add_modifiers(snow):
def add_particles(context, surface_area: float, height: float, coverage: float, snow_object: bpy.types.Object, ballobj: bpy.types.Object):
- # approximate the number of particles to be emitted
- number = int(surface_area*50*(height**-2)*((coverage/100)**2))
+ # Approximate the number of particles to be emitted
+ number = int(surface_area * 50 * (height ** -2) * ((coverage / 100) ** 2))
bpy.ops.object.particle_system_add()
particles = snow_object.particle_systems[0]
psettings = particles.settings
psettings.type = 'HAIR'
psettings.render_type = 'OBJECT'
- # generate random number for seed
+ # Generate random number for seed
random_seed = random.randint(0, 1000)
particles.seed = random_seed
- # set particles object
+ # Set particles object
psettings.particle_size = height
psettings.instance_object = ballobj
psettings.count = number
- # convert particles to mesh
+ # Convert particles to mesh
bpy.ops.object.select_all(action='DESELECT')
context.view_layer.objects.active = ballobj
ballobj.select_set(True)
@@ -192,8 +192,8 @@ def add_metaballs(context, height: float, snow_object: bpy.types.Object) -> bpy.
ball = bpy.data.metaballs.new(ball_name)
ballobj = bpy.data.objects.new(ball_name, ball)
bpy.context.scene.collection.objects.link(ballobj)
- # these settings have proven to work on a large amount of scenarios
- ball.resolution = 0.7*height+0.3
+ # These settings have proven to work on a large amount of scenarios
+ ball.resolution = 0.7 * height + 0.3
ball.threshold = 1.3
element = ball.elements.new()
element.radius = 1.5
@@ -203,22 +203,22 @@ def add_metaballs(context, height: float, snow_object: bpy.types.Object) -> bpy.
def delete_faces(vertices, bm_copy, snow_object: bpy.types.Object):
- # find upper faces
+ # Find upper faces
if vertices:
- selected_faces = [face.index for face in bm_copy.faces if face.select]
- # based on a certain angle, find all faces not pointing up
- down_faces = [face.index for face in bm_copy.faces if Vector((0, 0, -1.0)).angle(face.normal, 4.0) < (math.pi/2.0+0.5)]
+ selected_faces = set(face.index for face in bm_copy.faces if face.select)
+ # Based on a certain angle, find all faces not pointing up
+ down_faces = set(face.index for face in bm_copy.faces if Vector((0, 0, -1.0)).angle(face.normal, 4.0) < (math.pi / 2.0 + 0.5))
bm_copy.free()
bpy.ops.mesh.select_all(action='DESELECT')
- # select upper faces
+ # Select upper faces
mesh = bmesh.from_edit_mesh(snow_object.data)
for face in mesh.faces:
if vertices:
- if not face.index in selected_faces:
+ if face.index not in selected_faces:
face.select = True
if face.index in down_faces:
face.select = True
- # delete unneccessary faces
+ # Delete unnecessary faces
faces_select = [face for face in mesh.faces if face.select]
bmesh.ops.delete(mesh, geom=faces_select, context='FACES_KEEP_BOUNDARY')
mesh.free()
@@ -236,16 +236,16 @@ def area(obj: bpy.types.Object) -> float:
def add_material(obj: bpy.types.Object):
mat_name = "Snow"
- # if material doesn't exist, create it
+ # If material doesn't exist, create it
if mat_name in bpy.data.materials:
bpy.data.materials[mat_name].name = mat_name+".001"
mat = bpy.data.materials.new(mat_name)
mat.use_nodes = True
nodes = mat.node_tree.nodes
- # delete all nodes
+ # Delete all nodes
for node in nodes:
nodes.remove(node)
- # add nodes
+ # Add nodes
output = nodes.new('ShaderNodeOutputMaterial')
principled = nodes.new('ShaderNodeBsdfPrincipled')
vec_math = nodes.new('ShaderNodeVectorMath')
@@ -265,7 +265,7 @@ def add_material(obj: bpy.types.Object):
noise3 = nodes.new('ShaderNodeTexNoise')
mapping = nodes.new('ShaderNodeMapping')
coord = nodes.new('ShaderNodeTexCoord')
- # change location
+ # Change location
output.location = (100, 0)
principled.location = (-200, 500)
vec_math.location = (-400, 400)
@@ -285,7 +285,7 @@ def add_material(obj: bpy.types.Object):
noise3.location = (-1500, -400)
mapping.location = (-1700, 0)
coord.location = (-1900, 0)
- # change node parameters
+ # Change node parameters
principled.distribution = "MULTI_GGX"
principled.subsurface_method = "RANDOM_WALK"
principled.inputs[0].default_value[0] = 0.904
@@ -332,7 +332,7 @@ def add_material(obj: bpy.types.Object):
mapping.inputs[3].default_value[0] = 12
mapping.inputs[3].default_value[1] = 12
mapping.inputs[3].default_value[2] = 12
- # link nodes
+ # Link nodes
link = mat.node_tree.links
link.new(principled.outputs[0], output.inputs[0])
link.new(vec_math.outputs[0], principled.inputs[2])
@@ -355,7 +355,7 @@ def add_material(obj: bpy.types.Object):
link.new(mapping.outputs[0], noise2.inputs[0])
link.new(mapping.outputs[0], noise3.inputs[0])
link.new(coord.outputs[3], mapping.inputs[0])
- # set displacement and add material
+ # Set displacement and add material
mat.cycles.displacement_method = "DISPLACEMENT"
obj.data.materials.append(mat)
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