public static Vector2[] PlanarProject(Vector3[] verts, Vector3 planeNormal)
{
if (verts.Length < 3)
{
Debug.LogWarning("Attempting to project UVs on a face with < 3 vertices. This is most often caused by removing or creating Geometry and Undo-ing without selecting a new face. Try deselecting this object then performing your edits.");
return(new Vector2[verts.Length]);
}
Vector2[] uvs = new Vector2[verts.Length];
Vector3 vec = Vector3.zero;
pb_UV.ProjectionAxis project = pb_Math.GetProjectionAxis(planeNormal);
switch (project)
{
case pb_UV.ProjectionAxis.Planar_X:
vec = Vector3.up;
break;
case pb_UV.ProjectionAxis.Planar_Y:
vec = Vector3.forward;
break;
case pb_UV.ProjectionAxis.Planar_Y_Negative:
vec = -Vector3.forward;
break;
case pb_UV.ProjectionAxis.Planar_Z:
vec = Vector3.up;
break;
default:
vec = Vector3.forward;
break;
}
/**
* Assign vertices to UV coordinates
*/
for (int i = 0; i < verts.Length; i++)
{
float u, v;
Vector3 uAxis, vAxis;
// get U axis
uAxis = Vector3.Cross(planeNormal, vec);
uAxis.Normalize();
// calculate V axis relative to U
vAxis = Vector3.Cross(uAxis, planeNormal);
vAxis.Normalize();
u = Vector3.Dot(uAxis, verts[i]);
v = Vector3.Dot(vAxis, verts[i]);
uvs[i] = new Vector2(u, v);
}
return(uvs);
}
private void SetProjectionAxis(pb_UV.ProjectionAxis projectionAxis, pb_Object[] sel)
{
for (int i = 0; i < sel.Length; i++)
{
foreach (pb_Face q in sel[i].SelectedFaces)
{
q.uv.projectionAxis = projectionAxis;
}
sel[i].RefreshUV(SelectedFacesInEditZone[i]);
}
}
public static Vector3 ToVector3(this pb_UV.ProjectionAxis pa)
{
// Planar_X, // projects on x axis
// Planar_Y, // projects on y axis
// Planar_Z, // projects on z axis
// Planar_Y_Negative
switch (pa)
{
case pb_UV.ProjectionAxis.Planar_X:
return(Vector3.right);
case pb_UV.ProjectionAxis.Planar_Z:
return(Vector3.forward);
case pb_UV.ProjectionAxis.Planar_Y_Negative:
return(-Vector3.up);
default:
// case Planar_Y:
return(Vector3.up);
}
}