koobas.hobune.stream
VR transform tree mesh on axe hit
I'm lost. I want to deform a tree-mesh on an axe hit, at the position of the collision. How would this be possible? Mesh manipulation? Fake-holes? Shaders?
So far I tried it with moving the vertices, which can be seen in this gif:
https://imgur.com/a/KEfS5EQ
What I did to achieve that:
Find closest vertex to hit.point (raycast)
Find all triangles containing this point (+highlight them)
Find all vertices on a horizontal plane (the same level as the first found vertex)
Take those (3) vertices and assign them some velocity, code example (pseudo):
vertexVelocities = new Vector3[mesh.vertices.Length];
[...]
Vector3 point = hit.point;
point += hit.normal * forceOffset;
foreach vertex on same level
{
Vector3 pointVertex = vertex - point;
float attenuatedForce = force / (1f + pointVertex.sqrMagnitude);
float velocity = attenuatedForce * Time.deltaTime;
vertexVelocities[index] += pointVertex.normalized * velocity;
displacedVertices[i] += vertexVelocities[index] * (Time.deltaTime);
mesh.SetVertices(displacedVertices.ToList());
}
Problems can be seen in the gif.
I think I need to create more triangles at the position of impact, to get a higher resolution, but how?
Also, the direction of the vertex movement is not quite right. Also, the vertices are poking out of the tree...
Is this even a "good" approach? Maybe someone here has an idea to improve that, or even an alternative way of handling the issue.
Some help would be greatly appreciated.
