Setting rigid body cache start frame to active frame.

Coding Python Support
1

id like to have the rigid body cache start frame to be set to any active frame at the press of a button and have another button that “resets” it back by setting it back to 1. is that possible? any python lords out there that know how to achieve this?

2

Hi Albertofx,

Quick hack from simple object operator. Prepends button to scene cache panel, and physics props panel.


import bpy
from bpy.props import IntProperty


class SimpleOperator(bpy.types.Operator):
    """Tooltip"""
    bl_idname = "scene.rigidbody_set_frame_start"
    bl_label = "Rigid Body Frame Start"
    frame_start = IntProperty(default=1)

    @classmethod
    def poll(cls, context):
        # add rigidbody test
        return True

    def execute(self, context):
        scene = context.scene
        scene.rigidbody_world.point_cache.frame_start = self.frame_start
        return {'FINISHED'}

def add_buttons(self, context):
    layout = self.layout
    row = layout.row()
    scene = context.scene

    fs = 1
    if scene.rigidbody_world.point_cache.frame_start == 1:
        fs = scene.frame_current
        
    op = row.operator("scene.rigidbody_set_frame_start", text="Start Frame %d" % fs)
    op.frame_start = fs   

def register():
    #prepended to rigid body cache
    bpy.types.SCENE_PT_rigid_body_cache.prepend(add_buttons)
    #prepended to physics
    bpy.types.PHYSICS_PT_add.prepend(add_buttons)
    bpy.utils.register_class(SimpleOperator)


def unregister():
    #prepended to rigid body cache
    bpy.types.SCENE_PT_rigid_body_cache.remove(add_buttons)
    #appended to physics
    bpy.types.PHYSICS_PT_add.remove(add_buttons)
    bpy.utils.unregister_class(SimpleOperator)


if __name__ == "__main__":
    register()
3

Thank you so much!
how can the button be added to the toolbar instead? best if its the physics tab.

4

In the physics 3dview toolbar.


import bpy
from bpy.props import IntProperty


class SimpleOperator(bpy.types.Operator):
    """Tooltip"""
    bl_idname = "scene.rigidbody_set_frame_start"
    bl_label = "Rigid Body Frame Start"
    frame_start = IntProperty(default=1)

    @classmethod
    def poll(cls, context):
        # add rigidbody test
        return True

    def execute(self, context):
        scene = context.scene
        scene.rigidbody_world.point_cache.frame_start = self.frame_start
        return {'FINISHED'}

def add_buttons(self, context):
    layout = self.layout
    row = layout.row()
    row.label("Start Frame")
    row = layout.row()
    scene = context.scene

    fs = 1
    if scene.rigidbody_world.point_cache.frame_start == 1:
        fs = scene.frame_current
        
    op = row.operator("scene.rigidbody_set_frame_start", text="Start Frame %d" % fs)
    op.frame_start = fs   

def register():

    bpy.types.VIEW3D_PT_tools_rigid_body.append(add_buttons)
    bpy.utils.register_class(SimpleOperator)


def unregister():

    bpy.types.VIEW3D_PT_tools_rigid_body.remove(add_buttons)
    bpy.utils.unregister_class(SimpleOperator)


if __name__ == "__main__":
    register()