I have a mesh made of 94 groups of 4 vertices:
I need to scale each group of vertices by a decreasing factor (from 100% to 0%).
I tried two different ways to do that, the first is based on the same function called when using the "scale command" via user interface:
bpy.ops.transform.resize( value=(0.2, 0.2, 0.2), constraint_axis=(False, False, False), constraint_orientation='GLOBAL', mirror=False, proportional='DISABLED', proportional_edit_falloff='SMOOTH', proportional_size=1)
to begin, I tried to scale the first four vertices:
import bpy obj = bpy.context.active_object bpy.ops.object.mode_set(mode='EDIT') bpy.ops.mesh.select_all(action="DESELECT") verts = obj.data.vertices obj.data.vertices.select=True obj.data.vertices.select=True obj.data.vertices.select=True obj.data.vertices.select=True bpy.ops.transform.resize( value=(0.2, 0.2, 0.2), constraint_axis=(False, False, False), constraint_orientation='GLOBAL', mirror=False, proportional='DISABLED', proportional_edit_falloff='SMOOTH', proportional_size=1)
running the code in object mode with my mesh selected, just switches the enviroment to edit mode and nothing else, however if I manually select four vertices and run this script, it scales the four selected vertices correctly.
so.. why is
obj.data.vertices[i].select=True completely useless? and how can I correctly select the vertices in order to get
bpy.ops.transform.resize() correctly work on them?
I also tried to use bmesh library as it was recommended in most of the forums and guides I visited.
import bpy import bmesh import math import mathutils # Get the active mesh obj = bpy.context.edit_object me = obj.data # Get a BMesh representation bm = bmesh.from_edit_mesh(me) face = bm.faces.active vertices=[bm.verts,bm.verts,bm.verts,bm.verts] # Scale scale = mathutils.Vector((0.2,0.2,0.2)) bmesh.ops.scale( bm, vec=scale, verts=vertices ) # Show the updates in the viewport bmesh.update_edit_mesh(me, True)
this script actually does something: it scales the coordinates of the first four vertices. this means that for each vertex I pass to that function, its position is scaled respect to the origin of the scene ( the point (0,0,0) ).
But I want it to be scaled respect to the center of the four vertices, as it would be if I manually select the vertices and apply the
So, in the first case, how can I tell to "Blender" to select vertices in order to apply the
And in the latter case, how can I make it to scale respect to the center of the four vertices instead of the center of the image?
bpy.context.space_data.pivot_point = 'MEDIAN_POINT'$\endgroup$