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Test expose #42

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e20536c
expose more cspice functions
May 26, 2021
e8c54b0
update repo
May 26, 2021
d5591c6
memory allocation for input array for exposing m2q_c
May 27, 2021
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93 changes: 93 additions & 0 deletions src/Spice.js
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Original file line number Diff line number Diff line change
Expand Up @@ -1276,4 +1276,97 @@ export class Spice {
return { ptarg, lt };
}

spkezr(targ, et, ref, abcorr, obs) {
const Module = this.module;
// create output pointers
const starg_ptr = Module._malloc(DOUBLE_SIZE * 6);
const lt_ptr = Module._malloc(DOUBLE_SIZE);

Module.ccall(
'spkezr_c',
null,
/* ConstSpiceChar targ, SpiceDouble et, ConstSpiceChar ref, ConstSpiceChar abcorr, ConstSpiceChar obs, SpiceDouble ptarg, SpiceDouble lt */
[ 'string', 'number', 'string', 'string', 'string', 'number', 'number' ],
[ targ, et, ref, abcorr, obs, starg_ptr, lt_ptr ],
);

// read and free output pointers
const starg = [
Module.getValue( starg_ptr + DOUBLE_SIZE * 0, 'double' ),
Module.getValue( starg_ptr + DOUBLE_SIZE * 1, 'double' ),
Module.getValue( starg_ptr + DOUBLE_SIZE * 2, 'double' ),
Module.getValue( starg_ptr + DOUBLE_SIZE * 3, 'double' ),
Module.getValue( starg_ptr + DOUBLE_SIZE * 4, 'double' ),
Module.getValue( starg_ptr + DOUBLE_SIZE * 5, 'double' ),
];
Module._free( starg_ptr );

const lt = Module.getValue( lt_ptr, 'double' );
Module._free( lt_ptr );

return { starg, lt };
}

pxform(from, to, et) {
const Module = this.module;
// create output pointers

const rot_ptr = Module._malloc(DOUBLE_SIZE * 9);

Module.ccall(
'pxform_c',
null,
/* ConstSpiceChar from, ConstSpiceChar to, SpiceDouble et, SpiceDouble rot */
[ 'string', 'string', 'number', 'number'],
[ from, to, et, rot_ptr ],
);

// read and free output pointers
const rot = [
Module.getValue( rot_ptr + DOUBLE_SIZE * 0, 'double' ),
Module.getValue( rot_ptr + DOUBLE_SIZE * 1, 'double' ),
Module.getValue( rot_ptr + DOUBLE_SIZE * 2, 'double' ),
Module.getValue( rot_ptr + DOUBLE_SIZE * 3, 'double' ),
Module.getValue( rot_ptr + DOUBLE_SIZE * 4, 'double' ),
Module.getValue( rot_ptr + DOUBLE_SIZE * 5, 'double' ),
Module.getValue( rot_ptr + DOUBLE_SIZE * 6, 'double' ),
Module.getValue( rot_ptr + DOUBLE_SIZE * 7, 'double' ),
Module.getValue( rot_ptr + DOUBLE_SIZE * 8, 'double' ),
];
Module._free( rot_ptr );


return rot ;
}

m2q(R) {
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It looks like the m2q function is just used for extracting a quaternion from a rotation matrix -- I'm hesitant to think this should be included in the main project considering it doesn't do a lot with kernels and there are other simpler choices for doing 3d math in javascript like glMatrix. What do you think? What are you planning to use the function for?

const Module = this.module;
// create output pointers
const r_ptr = Module._malloc(DOUBLE_SIZE * 9);
for (let i = 0; i < 9; i++) {
Module.setValue(r_ptr + DOUBLE_SIZE * i, R[i], DOUBLE_TYPE);
}
const quat_ptr = Module._malloc(DOUBLE_SIZE * 4);

Module.ccall(
'm2q_c',
null,
/* ConstSpiceChar from, ConstSpiceChar to, SpiceDouble et, SpiceDouble rot */
[ 'number', 'number'],
[ r_ptr, quat_ptr ],
);

// read and free output pointers
const quat = [
Module.getValue( quat_ptr + DOUBLE_SIZE * 0, 'double' ),
Module.getValue( quat_ptr + DOUBLE_SIZE * 1, 'double' ),
Module.getValue( quat_ptr + DOUBLE_SIZE * 2, 'double' ),
Module.getValue( quat_ptr + DOUBLE_SIZE * 3, 'double' ),
];
Module._free( quat_ptr );


return quat ;
}

}