static PIX *
PtaDisplayRotate(PIX *pixs,
l_float32 xc,
l_float32 yc)
{
l_int32 i, w, h;
PIX *pix1, *pix2;
PTA *pta1, *pta2, *pta3, *pta4;
PTAA *ptaa;
/* Save rotated sets of pixels */
pta1 = ptaGetPixelsFromPix(pixs, NULL);
ptaa = ptaaCreate(0);
for (i = 0; i < 9; i++) {
pta2 = ptaRotate(pta1, xc, yc, -0.8 + 0.2 * i);
ptaaAddPta(ptaa, pta2, L_INSERT);
}
ptaDestroy(&pta1);
/* Render them */
pixGetDimensions(pixs, &w, &h, NULL);
pix1 = pixCreate(w, h, 32);
pixSetAll(pix1);
pta3 = generatePtaFilledCircle(4);
pta4 = ptaTranslate(pta3, xc, yc);
pixRenderPtaArb(pix1, pta4, 255, 0, 0); /* circle at rotation center */
pix2 = pixDisplayPtaa(pix1, ptaa); /* rotated sets */
pixDestroy(&pix1);
ptaDestroy(&pta3);
ptaDestroy(&pta4);
ptaaDestroy(&ptaa);
return pix2;
}
/*!
* boxaTranslate()
*
* Input: boxas
* transx (x component of translation wrt. the origin)
* transy (y component of translation wrt. the origin)
* Return: boxad (translated boxas), or null on error
*
* Notes;
* (1) See createMatrix2dTranslate() for details of transform.
*/
BOXA *
boxaTranslate(BOXA *boxas,
l_float32 transx,
l_float32 transy)
{
PTA *ptas, *ptad;
BOXA *boxad;
PROCNAME("boxaTranslate");
if (!boxas)
return (BOXA *)ERROR_PTR("boxas not defined", procName, NULL);
ptas = boxaConvertToPta(boxas, 4);
ptad = ptaTranslate(ptas, transx, transy);
boxad = ptaConvertToBoxa(ptad, 4);
ptaDestroy(&ptas);
ptaDestroy(&ptad);
return boxad;
}
