public:

ViewTransform();

~ViewTransform();

void MakeTransform();

// should be called after adjusting parameters

void TransformPoint(Real x, Real y, Real z,

Real &pX, Real &pY, Real &pZ);

void Print() const;

void GetRotationMat(MatrixFour m);

void ViewRotationMat() const;

void GetRenderRotationMat(MatrixFour m);

void ViewRenderRotationMat() const;

void SetAspect(Real apct) { vtAspect = apct; }

AmrQuaternion GetRotation() const { return rotation; }

void SetRotation(AmrQuaternion quat) { rotation = quat; }

AmrQuaternion GetRenderRotation() { return renderRotation; }

void SetRenderRotation(AmrQuaternion quat) { renderRotation = quat; }

void SetObjCenter(const Real x, const Real y, const Real z)

{ objCenterX = x; objCenterY = y; objCenterZ = z; }

void SetScreenPosition(int x, int y)

{ screenPositionX = x; screenPositionY = y; }

void SetScale(Real s) { scale = s; }

Real GetScale(void) { return scale; }

void SetAdjustments(Real len, int width, int height);

void MakeTranslation(int x1, int y1, int x2, int y2, Real bS);

void ResetTranslation() { boxTransX = renTransX = boxTransY = renTransY = 0.0; }

Real GetRenTransX() const { return renTransX; }

Real GetRenTransY() const { return renTransY; }

void SetRenTransX(const Real newRenTransX) { renTransX = newRenTransX; }

void SetRenTransY(const Real newRenTransY) { renTransY = newRenTransY; }

Real InfNorm();

AmrQuaternion Screen2Quat(int, int, int, int, Real);

void SetAdjust(Real txA, Real tyA) { txAdjust = txA; tyAdjust = tyA; }

private:

Real scale, boxTransX, boxTransY, renTransX, renTransY;

AmrQuaternion rotation, renderRotation;

int screenPositionX, screenPositionY;

Real objCenterX, objCenterY, objCenterZ;

MatrixFour mRotation, mRenderRotation;

Real txAdjust, tyAdjust;

Real vtAspect;