[Bf-committers] Camera view navigation rant

[Daniel Salazar - 3Developer.com]

@dfelinto(pto): nope, it would need to *stay* in camera view when panning
and dollying around :)

Daniel Salazar
3Developer.com



On Tue, Apr 26, 2011 at 12:58 PM, Dalai Felinto <dfelinto at gmail.com> wrote:
>> Below you can find some code for (...) Lock camera to view.
> Isn't this what Ctrl+Alt+Numpad0 do? (align camera to view -- which
> even takes care of non-perspective views)
>
> On my understanding what people are ranting is for the lack of options
> to move while "inside" the camera mode.
>
> --
> Dalai
>
> 2011/4/26 bartius crouch <bartius.crouch at gmail.com>:
>>> Also a lock camera to view option would be great so we can just move
>>> the camera like we move any other viewport
>>
>> Like Campbell said, that isn't very hard to do in python. Below you can find
>> some code for it.
>> Copy the text below into the text-editor, Run Script (alt+P), go to 3d-view,
>> search (spacebar) for Lock camera to view.
>>
>>
>>
>> import bpy
>> import mathutils
>>
>>
>> class ModalOperator(bpy.types.Operator):
>>    '''Move camera along with the viewport'''
>>    bl_idname = "view3d.lock_camera"
>>    bl_label = "Lock camera to view"
>>
>>    @classmethod
>>    def poll(cls, context):
>>        camera = context.scene.camera
>>        if not camera:
>>            return(False)
>>        return(camera.name in context.scene.objects)
>>
>>    def modal(self, context, event):
>>        camera = context.scene.camera
>>        rv3d = context.space_data.region_3d
>>
>>        # rotation + location
>>        camera.matrix_world = rv3d.view_matrix.copy().inverted()
>>
>>        # override location to take view_distance into account
>>        rotation = rv3d.view_matrix.copy().to_3x3().inverted()
>>        z_normal = mathutils.Vector([0.0, 0.0, 1.0]) * rotation
>>        camera.location = rv3d.view_location + (rv3d.view_distance *
>> z_normal)
>>
>>        # handle events
>>        if event.type in ['LEFTMOUSE', 'NUMPAD_ENTER', 'RET']:
>>            context.area.header_text_set()
>>            return {'FINISHED'}
>>        elif event.type == 'ESC':
>>            camera.matrix_world = self.camera_matrix
>>            context.area.header_text_set()
>>            return {'CANCELLED'}
>>
>>        return {'PASS_THROUGH'}
>>
>>    def invoke(self, context, event):
>>        context.window_manager.modal_handler_add(self)
>>        self.camera_matrix = context.scene.camera.matrix_world.copy()
>>        context.space_data.region_3d.view_perspective = 'PERSP'
>>        context.area.header_text_set("ESC to cancel, ENTER or LMB to
>> confirm")
>>        return {'RUNNING_MODAL'}
>>
>>
>> def register():
>>    bpy.utils.register_class(ModalOperator)
>>
>>
>> def unregister():
>>    bpy.utils.unregister_class(ModalOperator)
>>
>>
>> if __name__ == "__main__":
>>    register()
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