project3d.h File Reference

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Functions
int	fwdpj3 (Vec3i volsize, int nrays, int nnz, float *dm, Vec3i origin, int ri, int *ptrs, int *cord, float *x, float *y)
int	bckpj3 (Vec3i volsize, int nrays, int nnz, float *dm, Vec3i origin, int ri, int *ptrs, int *cord, float *x, float *y)
int	sph2cb (float *sphere, Vec3i volsize, int nrays, int ri, int nnz0, int *ptrs, int *cord, float *cube)
int	cb2sph (float *cube, Vec3i volsize, int ri, Vec3i origin, int nnz0, int *ptrs, int *cord, float *sphere)
int	getnnz (Vec3i volsize, int ri, Vec3i origin, int *nrays, int *nnz)
int	ifix (float a)
int	make_proj_mat (float phi, float theta, float psi, float *dm)

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Function Documentation

int bckpj3	(	Vec3i	volsize,
		int	nrays,
		int	nnz,
		float *	dm,
		Vec3i	origin,
		int	ri,
		int *	ptrs,
		int *	cord,
		float *	x,
		float *	y
	)

int cb2sph	(	float *	cube,
		Vec3i	volsize,
		int	ri,
		Vec3i	origin,
		int	nnz0,
		int *	ptrs,
		int *	cord,
		float *	sphere
	)

int fwdpj3	(	Vec3i	volsize,
		int	nrays,
		int	nnz,
		float *	dm,
		Vec3i	origin,
		int	ri,
		int *	ptrs,
		int *	cord,
		float *	x,
		float *	y
	)

int getnnz	(	Vec3i	volsize,
		int	ri,
		Vec3i	origin,
		int *	nrays,
		int *	nnz
	)

int ifix

(

float

a

)

Definition at line 41 of file utilnum.cpp.

Referenced by bckpj3(), bckpj3_Cart(), fwdpj3(), and fwdpj3_Cart().

{
    int ia = 0;
    if (a >= 0.0) {
       ia = (int)floor(a);
    }
    else {
       ia = (int)ceil(a);
    }
    return ia;
}

int make_proj_mat	(	float	phi,
		float	theta,
		float	psi,
		float *	dm
	)

Definition at line 354 of file project3d.cpp.

{
//     float cphi=cos(phi);
//     float sphi=sin(phi);
//     float cthe=cos(theta);
//     float sthe=sin(theta);
//     float cpsi=cos(psi);
//     float spsi=sin(psi);

    double cphi, sphi, cthe, sthe, cpsi, spsi;
    double dphi = phi;
    double dthe = theta;
    double dpsi = psi;
    sincos(dphi, &sphi, &cphi);
    sincos(dthe, &sthe, &cthe);
    sincos(dpsi, &spsi, &cpsi);

    dm[0]=cphi*cthe*cpsi-sphi*spsi;
    dm[1]=sphi*cthe*cpsi+cphi*spsi;
    dm[2]=-sthe*cpsi;
    dm[3]=-cphi*cthe*spsi-sphi*cpsi;
    dm[4]=-sphi*cthe*spsi+cphi*cpsi;
    dm[5]=sthe*spsi;

    return 0;
}

int sph2cb	(	float *	sphere,
		Vec3i	volsize,
		int	nrays,
		int	ri,
		int	nnz0,
		int *	ptrs,
		int *	cord,
		float *	cube
	)