## Newton Vehicle Add Tire Question

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### Newton Vehicle Add Tire Question

The problem is that i cant see where Newton engine put my vehicle tiers.
I cant see them because i use Andorra 2D, and basically i programmed my vehicle class in blind.

Now i set the position of my tiers like this
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`TireMatrix:=AdMatrix_Translate(20, 10, 0);AddTire(TireMatrix, 10, 10);`

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`AdMatrix_Identity : TAdMatrix = ((1,0,0,0),(0,1,0,0),(0,0,1,0),(0,0,0,1));function AdMatrix_Translate(const tx,ty,tz:single):TAdMatrix;begin  result := AdMatrix_Identity;  result[3,0] := tx;  result[3,1] := ty;  result[3,2] := tz;end;`

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`constructor TNewtonTire.Create(pVehicle : TVehicle; pMatrix : TAdMatrix; pWidth, pRadius : Single);var tireMass             : Single; tireSuspensionShock  : Single; tireSuspensionSpring : Single; tireSuspensionLength : Single; tirePin              : TAdVector3;begin  tireMass             := pVehicle.Mass/20;  tireSuspensionLength := 0.3;  tireSuspensionSpring := (200 * 9.8) / 0.3;  tireSuspensionShock  := 2 * Sqrt(tireSuspensionSpring);  TirePin := AdVector3(0, 0, 1);  ID:=Integer(NewtonVehicleAddTire(pVehicle.VehicleJoint, @PMatrix[0,0], @TirePin.X, tireMass, pWidth, pRadius,tireSuspensionShock, tireSuspensionSpring, tireSuspensionLength, self, 0));  NewtonVehicleSetTireMaxLongitudinalSlideSpeed(pVehicle.VehicleJoint, Pointer(ID), 500);end;`

Could you explain me how the matrix for tiers works. How to set them in their appropriate place. and what size to give them for my Car box with size 200 width and 100 height and 100 Z tall.
TreantBG

Posts: 16
Joined: Wed Apr 25, 2012 4:14 pm