koobas.hobune.stream
Real-Time Mesh Deforming problem
Hey everyone. I want to know if it's possible to make such a Real-time mesh Deformation System like I am thinking to do. My way to do this would be a OnCollisionEnter in the Mesh to get the Contact Point with the collisor and pass this Vector3 to a function wich is a for loop that check de Distance of each vertice to the contact Point and if it's less than like 20.0F the vertice go down in the y axis with the strength of CollisorMass/DistanceToContactPoint. I apply this way of think in a script but the deformation is not occurring in the Contact Point and sometimes the mesh not even deform. Here are the two necessary voids:
void Deform(Vector3 colPos, float colMass) {
Vector3 newColPos = new Vector3(colPos.x, 0, colPos.z);
Mesh mesh = GetComponent<MeshFilter>().sharedMesh;
Vector3[] vertices = mesh.vertices;
for(int i = 0; i < mesh.vertexCount; i++) {
float distance = Vector3.Distance(vertices[i], newColPos);
if(distance < 20.0F) {
vertices[i] = new Vector3(vertices[i].x, vertices[i].y, vertices[i].z - (colMass/distance));
}
}
mesh.vertices = vertices;
mesh.RecalculateBounds();
}
void OnCollisionEnter(Collision collider) {
Vector3 colPosition = collider.contacts[0].point;
Deform(colPosition, collider.gameObject.GetComponent<Rigidbody>().mass);
}
Hope you guys can help me with this!
You must convert the contact point to object space, since the mesh.vertices is in object space.
Just substitute the following line in OnCollisionEnter: Vector3 colPosition = renderer.worldToLocalMatrix * collider.contacts[0].point;
Now, for this to work as intended, avoid changing the gameObject's scale. Otherwise you'll have to change how you measure distance in object space.
Thanks for the reply! Now it works a lot better but the deform still not occurs right where the object hit the mesh. As you can see in the SS, it occurs in a certain distance from the sphere. This distance is constant. Any idea about what is causing this?
The renderer matrices are special matrices for shader parameters. In your usual gamelogic you should better use `transform.worldToLocal$$anonymous$$atrix` or what would be actually easier to read:
transform.InverseTransformPoint(collisionInfo.contacts[0].point)
Bunny83, that works perfectly! Thank you ( again ) ! =D Thanks Poindexter, you was on the right way. (:
