struct vec2 Vec2FromRadians(const float radians)
{
struct vec2 v = svec2_rotate(svec2(0, -1), radians);
// Scale Y so that they match the tile ratios
v.y *= (float)TILE_HEIGHT / TILE_WIDTH;
return v;
}
struct vec2 NetToVec2(const NVec2 v)
{
return svec2(v.x, v.y);
}
void mexFunction(int nlhs, mxArray *plhs[],
int nrhs, const mxArray *prhs[] )
{ mxArray *blk_cell_pr;
double *A, *B, *AI, *BI, *blksize;
mwIndex *irA, *jcA, *irB, *jcB;
int *cumblksize, *blknnz;
int mblk, isspA, isspB, iscmpA;
mwIndex subs[2];
mwSize nsubs=2;
int m, n, n2, nsub, k, index, numblk, NZmax, type;
double r2;
/* CHECK FOR PROPER NUMBER OF ARGUMENTS */
if (nrhs < 2){
mexErrMsgTxt("mexsvec: requires at least 2 input arguments."); }
if (nlhs > 1){
mexErrMsgTxt("mexsvec: requires 1 output argument."); }
/* CHECK THE DIMENSIONS */
mblk = mxGetM(prhs[0]);
if (mblk > 1) {
mexErrMsgTxt("mexsvec: blk can have only 1 row."); }
m = mxGetM(prhs[1]);
n = mxGetN(prhs[1]);
if (m != n) {
mexErrMsgTxt("mexsvec: matrix must be square."); }
subs[0] = 0; subs[1] = 1;
index = mxCalcSingleSubscript(prhs[0],nsubs,subs);
blk_cell_pr = mxGetCell(prhs[0],index);
numblk = mxGetN(blk_cell_pr);
blksize = mxGetPr(blk_cell_pr);
if (numblk == 1) {
n2 = n*(n+1)/2;
} else {
cumblksize = mxCalloc(numblk+1,sizeof(int));
blknnz = mxCalloc(numblk+1,sizeof(int));
cumblksize[0] = 0; blknnz[0] = 0;
n = 0; n2 = 0;
for (k=0; k<numblk; ++k) {
nsub = (int) blksize[k];
n += nsub;
n2 += nsub*(nsub+1)/2;
cumblksize[k+1] = n;
blknnz[k+1] = n2; }
}
/***** assign pointers *****/
A = mxGetPr(prhs[1]);
isspA = mxIsSparse(prhs[1]);
iscmpA = mxIsComplex(prhs[1]);
if (isspA) { irA = mxGetIr(prhs[1]);
jcA = mxGetJc(prhs[1]);
NZmax = mxGetNzmax(prhs[1]);
} else {
NZmax = n2;
}
if (iscmpA) { AI = mxGetPi(prhs[1]); }
if ((numblk > 1) & (!isspA)) {
mexErrMsgTxt("mexsvec: matrix must be sparse for numblk > 1"); }
if (nrhs > 2) {
if (mxGetM(prhs[2])>1) { isspB = (int)*mxGetPr(prhs[2]); }
else if (NZmax < n2/2) { isspB = 1; }
else { isspB = 0; }
} else {
if (NZmax < n2/2) { isspB = 1; }
else { isspB = 0; }
}
if (nrhs > 3) { type = (int)*mxGetPr(prhs[3]); }
else { type = 0; }
/***** create return argument *****/
if (isspB) {
if (iscmpA) {
plhs[0] = mxCreateSparse(n2,1,NZmax,mxCOMPLEX);
} else {
plhs[0] = mxCreateSparse(n2,1,NZmax,mxREAL);
}
B = mxGetPr(plhs[0]);
irB = mxGetIr(plhs[0]);
jcB = mxGetJc(plhs[0]);
jcB[0] = 0;
} else {
if (iscmpA) {
plhs[0] = mxCreateDoubleMatrix(n2,1,mxCOMPLEX);
} else {
plhs[0] = mxCreateDoubleMatrix(n2,1,mxREAL);
}
B = mxGetPr(plhs[0]);
}
if (iscmpA) { BI = mxGetPi(plhs[0]); }
/***** Do the computations in a subroutine *****/
r2 = sqrt(2);
if (type == 0) {
if (iscmpA) {
if (numblk == 1) {
svec1cmp(n,r2,A,irA,jcA,isspA,B,irB,jcB,isspB,AI,BI); }
else {
svec2cmp(n,numblk,cumblksize,blknnz,r2,A,irA,jcA,isspA,B,irB,jcB,isspB,AI,BI);
}
} else {
if (numblk == 1) {
svec1(n,r2,A,irA,jcA,isspA,B,irB,jcB,isspB); }
else {
svec2(n,numblk,cumblksize,blknnz,r2,A,irA,jcA,isspA,B,irB,jcB,isspB);
}
}
} else {
if (iscmpA) {
if (numblk == 1) {
svec3cmp(n,r2,A,irA,jcA,isspA,B,irB,jcB,isspB,AI,BI); }
else {
svec4cmp(n,numblk,cumblksize,blknnz,r2,A,irA,jcA,isspA,B,irB,jcB,isspB,AI,BI);
}
} else {
if (numblk == 1) {
svec3(n,r2,A,irA,jcA,isspA,B,irB,jcB,isspB); }
else {
svec4(n,numblk,cumblksize,blknnz,r2,A,irA,jcA,isspA,B,irB,jcB,isspB);
}
}
}
return;
}
struct vec2 Vec2FromRadiansScaled(const float radians)
{
return svec2(
sinf(radians), -cosf(radians) * TILE_HEIGHT / TILE_WIDTH);
}