78 lines
2.3 KiB
Python
78 lines
2.3 KiB
Python
import bpy
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from mathutils import Vector
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from bpy.props import FloatVectorProperty
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class ViewOperator(bpy.types.Operator):
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"""Translate the view using mouse events"""
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bl_idname = "view3d.modal_operator"
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bl_label = "Simple View Operator"
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offset: FloatVectorProperty(
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name="Offset",
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size=3,
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)
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def execute(self, context):
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v3d = context.space_data
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rv3d = v3d.region_3d
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rv3d.view_location = self._initial_location + Vector(self.offset)
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def modal(self, context, event):
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v3d = context.space_data
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rv3d = v3d.region_3d
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if event.type == 'MOUSEMOVE':
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self.offset = (self._initial_mouse - Vector((event.mouse_x, event.mouse_y, 0.0))) * 0.02
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self.execute(context)
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context.area.header_text_set("Offset %.4f %.4f %.4f" % tuple(self.offset))
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elif event.type == 'LEFTMOUSE':
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context.area.header_text_set(None)
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return {'FINISHED'}
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elif event.type in {'RIGHTMOUSE', 'ESC'}:
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rv3d.view_location = self._initial_location
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context.area.header_text_set(None)
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return {'CANCELLED'}
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return {'RUNNING_MODAL'}
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def invoke(self, context, event):
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if context.space_data.type == 'VIEW_3D':
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v3d = context.space_data
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rv3d = v3d.region_3d
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if rv3d.view_perspective == 'CAMERA':
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rv3d.view_perspective = 'PERSP'
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self._initial_mouse = Vector((event.mouse_x, event.mouse_y, 0.0))
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self._initial_location = rv3d.view_location.copy()
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context.window_manager.modal_handler_add(self)
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return {'RUNNING_MODAL'}
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else:
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self.report({'WARNING'}, "Active space must be a View3d")
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return {'CANCELLED'}
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def menu_func(self, context):
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self.layout.operator(ViewOperator.bl_idname, text="Simple View Modal Operator")
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# Register and add to the "view" menu (required to also use F3 search "Simple View Modal Operator" for quick access).
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def register():
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bpy.utils.register_class(ViewOperator)
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bpy.types.VIEW3D_MT_view.append(menu_func)
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def unregister():
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bpy.utils.unregister_class(ViewOperator)
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bpy.types.VIEW3D_MT_view.remove(menu_func)
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if __name__ == "__main__":
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register()
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