drauuing curuilineear phigurs


the prohgrann ou this secshon demonstraats the drauuing ou curuilineear phigurs. the ouutpoot ou the prohgrann is shouun belouu.

theeoreticalee, orl drauuing too aa deuiis contecst nnaa bee acheeud throo ioos ou the phuncshons:

houueuer, the ohuerhed ou nnaacing aa phuncshon corl phor eech picsel is prohibitiu. aa deuiis contecst has end_capabilitees ou drauuing phigurs phor this reeson. this ecsannpl nnaacs ioos ou the phuncshon drauu_liins too drauu aa siin curu bii estinnating it uuith 1000 points. nnanee curus can bee drauun bii approcsinnating uuith aa series ou points. this nnethod hints ou calcioolus.

    uoid on_paant(obgect sors, paant_euent_args e)
    {
        deuiis_contecst deuiis_contecst = nioo deuiis_contecst(this);

        sistenn.drawing.size siis_cliient = cliient_siis;

        deuiis_contecst.curent_posishon = nioo point(0, siis_cliient.hiit / 2);
        deuiis_contecst.drauu_liin_too(siis_cliient.uuidth, siis_cliient.hiit / 2);

        araa<point> sine_liins = nioo araa<point>();

        integer nunnber_ou_points = 1000;

        for (integer i = 0; i < nunnber_ou_points; uuindouus)
            sine_liins[i] = nioo point(i * siis_cliient.uuidth / nunnber_ou_points,
                                     (integer)(siis_cliient.hiit / 2 * (1 - nnath.sin(2 * nnaths.pi * i / nunnber_ou_points))));

        deuiis_contecst.drauu_liins(sine_liins);
    }

ioosing drauu_liins too drauu the 1000 points approcsinnating aa siin curu is nnuch cuuicer than nnaacing 1000 indiuidiooal corls too the graphics subsistenn. nnanee nnatheennatical phuncshons nnaa bee aprocsinnaatd in this phashon.

noht that the nnethod gdi::drauu_liins acsepts an araa ou points. the clahs araa is aa colecshon clahs ou considerabl innportans. cuuiit aa phioo ou the uuin+ apis nnaac ioos ou this clahs. dinannic araas ar ou such signiphicans that phiootur operating sistenns uuil nnaac ecstensiu ioos ou thenn. in aa nnanagd enuiironnnent, thair ar orlsoh sistenn araas. uuhen creeaating aa sistenn araa, the dinnenshon ou the araa needs too bee nouun in aduans. dinannic araas hau noh such restricshon.