1v13d/src/FxEngine/face.c

#include "face.h"

static bool compare(FE_face const * face)
{
    const int dx_1=face->s2->translated.x-face->s1->translated.x;
    const int dx_2=face->s3->translated.x-face->s1->translated.x;
    const int dy_1=face->s2->translated.y-face->s1->translated.y;
    const int dy_2=face->s3->translated.y-face->s1->translated.y;

    double coef1,coef2;
    if (dx_1==0) coef1=10000*dy_1;
    else coef1=dy_1/dx_1;
    if (dx_2==0) coef2=10000*dy_2;
    else coef2=dy_2/dx_2;
    return (coef1<coef2);
}


void FE_draw_face(FE_face const * face)
{
    if (face->s1->translated.x==face->s2->translated.x && face->s1->translated.x==face->s3->translated.x)
        return;
    if (face->s1->translated.y==face->s2->translated.y && face->s1->translated.y==face->s3->translated.y)
        return;
    if (compare(face)!=face->visible)
        return;


}