Hi,
Even through my profile is quite old on this forum, I’m quite new to the usage of UE4.
I’m currently trying to setup physics for a tank and I struggle getting the Bone Driven Controllers to do what I want. Perhaps someone can help me out on this.
My tank is setup using wheel joints and suspension joints. The wheel joints have the wheels rigged to them (WL_x with x=1-7). The suspension joints are located at the exact same spot to the corresponding wheel joint (LT_x with x=1-7). In the image shown below, WL_3 and LT_3 are in the same spot (before the physics simulation). The suspension joints have parts of the track mesh rigged to them.
This way, I can freely rotate the wheel and move the suspension joint to move the track part. I’ve tested this is in the skeleton view with disabled animation blueprint.
Now, I have created the physics part which uses capsules on each wheel joint to detect interaction with the underground. I’ve created the contraints and when I move my tank onto an obstacle, the wheel rotates accordingly to the movement and moves up/down accordingly to the physics collision. In the image below, you can see that the wheel reacts accordingly to the obstacle touched.
Because I want to bend the tracks, I want to move the LT_3 to the same spot than the WL_3. Given that the suspension only alters the position in the Z-axis, I’ve created an animation blueprint using bone driven controllers to copy the z translation of WL_3 to LT_3. The setup is show below.
The thing is, it doesn’t work. I’ve assigned the animation blueprint to the pawn blueprint but the LT_x parts won’t move.
Can anyone point me to the right direction to fix this issue? Do I have to tick one or another checkbox to make this work?
Also, when the animation blueprint is linked to the pawn blueprint and when I’m in the skeletal view, I cannot move the WL_x bones. I have to disable the animation blueprint to be able to do so. Any idea why this is happening? Given that I do not animate WL_x but simply copy its z translation, I thought I should be able to move it.
Thanks for pointing me into the right direction 