physics rigid body animation fails on second play with alt-A if the body is moved #52457

Closed
opened 2017-08-19 23:01:57 +02:00 by Paul Danielson · 4 comments

System Information
Alienware X51 R3 2 x Core i7-6700 @ 3.4GHz, 32GB RAM
WIndows 10 Pro 64-bit
GTX-970, driver version 385.28

Blender Version
Broken: 2.79 Release Candidate
Worked: 2.78c

Short description of error
If the cube in the example is moved after the physics simulation has been run once, the simulation does not start at the new location of the cube. When alt-A is pressed, the cube jumps to the old start location, the current frame advances, but the cube does not move. Running the simulation again, it works as expected.

physicsBug.blend

Exact steps for others to reproduce the error
Start with the default scene.
select Cube, move it up and rotate it. (g z 10, r 30)
add an Active physics rigid body to Cube
cursor to (0,0,0), add a mesh plane, scale by 10 (s 10)
add a Passive physics rigid body to Plane

The attached blend file has the previous steps completed

press alt-A to start the simulation
press alt-A to stop the simulation after Cube has stopped moving
in the Timeline editor rewind to frame 1
select Cube, move it along the y axis (g y -3)
press alt-A. The cube appears to jump back to (0,0,10), and does not fall, even though the frame time is advancing in the Timeline editor
press alt-A to stop the simulation
in the Timeline editor rewind to frame 1. Cube appears to move back to (0,-3,10)
press alt-A. The cube drops from (0,-3,10) as expected

**System Information** Alienware X51 R3 2 x Core i7-6700 @ 3.4GHz, 32GB RAM WIndows 10 Pro 64-bit GTX-970, driver version 385.28 **Blender Version** Broken: 2.79 Release Candidate Worked: 2.78c **Short description of error** If the cube in the example is moved after the physics simulation has been run once, the simulation does not start at the new location of the cube. When alt-A is pressed, the cube jumps to the old start location, the current frame advances, but the cube does not move. Running the simulation again, it works as expected. [physicsBug.blend](https://archive.blender.org/developer/F718853/physicsBug.blend) **Exact steps for others to reproduce the error** Start with the default scene. select Cube, move it up and rotate it. (g z 10, r 30) add an Active physics rigid body to Cube cursor to (0,0,0), add a mesh plane, scale by 10 (s 10) add a Passive physics rigid body to Plane The attached blend file has the previous steps completed press alt-A to start the simulation press alt-A to stop the simulation after Cube has stopped moving in the Timeline editor rewind to frame 1 select Cube, move it along the y axis (g y -3) press alt-A. The cube appears to jump back to (0,0,10), and does not fall, even though the frame time is advancing in the Timeline editor press alt-A to stop the simulation in the Timeline editor rewind to frame 1. Cube appears to move back to (0,-3,10) press alt-A. The cube drops from (0,-3,10) as expected
Author

Changed status to: 'Open'

Changed status to: 'Open'
Author

Added subscriber: @MichaelDanielson

Added subscriber: @MichaelDanielson
Member

Added subscribers: @Sergey, @mont29, @brecht

Added subscribers: @Sergey, @mont29, @brecht
Member

Closed as duplicate of #52374

Closed as duplicate of #52374
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Reference: blender/blender#52457
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