Tire brakes trace on road

hi, there is a sample, in blitz samples, in Mark directory -> Tron...


this is part of the code, creating a mesh with vertexs...


If add_flag
AddVertex trail_surf,EntityX(bike),2,EntityZ(bike),0,0
AddVertex trail_surf,EntityX(bike),0,EntityZ(bike),0,1
AddTriangle trail_surf,trail_vert,trail_vert+2,trail_vert+3
AddTriangle trail_surf,trail_vert,trail_vert+3,trail_vert+1
AddTriangle trail_surf,trail_vert,trail_vert+3,trail_vert+2
AddTriangle trail_surf,trail_vert,trail_vert+1,trail_vert+3
trail_vert=trail_vert+2
Else
VertexCoords trail_surf,trail_vert,EntityX(car),EntityY(car),EntityZ(car)
VertexCoords trail_surf,trail_vert+1,EntityX(car),EntityY(car),EntityZ(car)
EndIf