Disappearing grid and wrongly labeled "Front Orthographic" instead of "Top Orthographic" view #93779

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Johannes Schmitz · 2021-12-07T00:11:53+01:00

Johannes Schmitz commented

2021-12-07 00:11:53 +01:00

System Information
Operating system: Linux Mint
Graphics card: Nvidia GTX 2060 Super

Blender Version
Broken: 2.93.5

Short description of error
When going back to the a stored previous topview Blender mistakenly shows it as "Front Orthographic" instead of "Top Orthographic". Also the grid disappears.

Exact steps for others to reproduce the error

Load script below, press ESC once to exit
Go to Layout then set "Top Orthographic" view
Run modal operator from script with F3: "Sideview Operator"
Press and hold S button to toggle sideview
Release S button to observe the problem
Press ESC to exit

import bpy

from mathutils import Euler
from math import pi


class SideviewOperator(bpy.types.Operator):
    bl_idname = "object.sideview_operator"
    bl_label = "Simple Sideview Operator"

    state = 'DISABLED'

    def __init__(self):
        print("Start")

    def __del__(self):
        print("End")

    def execute(self, context):
        return {'FINISHED'}

    def modal(self, context, event):
        # state side view for elevation adjustment
        if event.type == 'S':
            if event.value == 'PRESS':
                if self.state == 'DISABLED':
                    # Remember previous view
                    view3d = context.space_data
                    self.view_rotation_previous = view3d.region_3d.view_rotation.copy()
                    self.view_perspective_previous = view3d.region_3d.view_perspective
                    self.is_orthographic_side_view_previous = view3d.region_3d.is_orthographic_side_view
                    # Look at object from side with some rotation
                    bpy.ops.view3d.view_axis(type='LEFT', align_active=False, relative=False)
                    region_view3d = view3d.region_3d
                    region_view3d.view_rotation.rotate(Euler((0, 0, pi/4)))
                    self.state = 'SIDEVIEW'
            elif event.value == 'RELEASE':
                if self.state == 'SIDEVIEW':
                    # Restore previous view
                    view3d = context.space_data
                    view3d.region_3d.view_rotation = self.view_rotation_previous
                    view3d.region_3d.view_perspective = self.view_perspective_previous
                    view3d.region_3d.is_orthographic_side_view = self.is_orthographic_side_view_previous
                self.state = 'DISABLED'
        elif event.type in {'ESC'}:  # Cancel
            return {'CANCELLED'}

        return {'RUNNING_MODAL'}

    def invoke(self, context, event):
        self.execute(context)

        context.window_manager.modal_handler_add(self)
        return {'RUNNING_MODAL'}

# Only needed if you want to add into a dynamic menu
def menu_func(self, context):
    self.layout.operator(SideviewOperator.bl_idname, text="Sideview Operator")

# Register and add to the object menu (required to also use F3 search "Sideview Operator" for quick access)
bpy.utils.register_class(SideviewOperator)
bpy.types.VIEW3D_MT_object.append(menu_func)

# test call
bpy.ops.object.sideview_operator('INVOKE_DEFAULT')

**System Information** Operating system: Linux Mint Graphics card: Nvidia GTX 2060 Super **Blender Version** Broken: 2.93.5 **Short description of error** When going back to the a stored previous topview Blender mistakenly shows it as "Front Orthographic" instead of "Top Orthographic". Also the grid disappears. **Exact steps for others to reproduce the error** - Load script below, press ESC once to exit - Go to Layout then set "Top Orthographic" view - Run modal operator from script with F3: "Sideview Operator" - Press and hold S button to toggle sideview - Release S button to observe the problem - Press ESC to exit ``` import bpy from mathutils import Euler from math import pi class SideviewOperator(bpy.types.Operator): bl_idname = "object.sideview_operator" bl_label = "Simple Sideview Operator" state = 'DISABLED' def __init__(self): print("Start") def __del__(self): print("End") def execute(self, context): return {'FINISHED'} def modal(self, context, event): # state side view for elevation adjustment if event.type == 'S': if event.value == 'PRESS': if self.state == 'DISABLED': # Remember previous view view3d = context.space_data self.view_rotation_previous = view3d.region_3d.view_rotation.copy() self.view_perspective_previous = view3d.region_3d.view_perspective self.is_orthographic_side_view_previous = view3d.region_3d.is_orthographic_side_view # Look at object from side with some rotation bpy.ops.view3d.view_axis(type='LEFT', align_active=False, relative=False) region_view3d = view3d.region_3d region_view3d.view_rotation.rotate(Euler((0, 0, pi/4))) self.state = 'SIDEVIEW' elif event.value == 'RELEASE': if self.state == 'SIDEVIEW': # Restore previous view view3d = context.space_data view3d.region_3d.view_rotation = self.view_rotation_previous view3d.region_3d.view_perspective = self.view_perspective_previous view3d.region_3d.is_orthographic_side_view = self.is_orthographic_side_view_previous self.state = 'DISABLED' elif event.type in {'ESC'}: # Cancel return {'CANCELLED'} return {'RUNNING_MODAL'} def invoke(self, context, event): self.execute(context) context.window_manager.modal_handler_add(self) return {'RUNNING_MODAL'} # Only needed if you want to add into a dynamic menu def menu_func(self, context): self.layout.operator(SideviewOperator.bl_idname, text="Sideview Operator") # Register and add to the object menu (required to also use F3 search "Sideview Operator" for quick access) bpy.utils.register_class(SideviewOperator) bpy.types.VIEW3D_MT_object.append(menu_func) # test call bpy.ops.object.sideview_operator('INVOKE_DEFAULT') ```

Johannes Schmitz commented

2021-12-07 00:11:53 +01:00

Added subscriber: @johschmitz