Function cursorupdate

source/src/editing.cpp:224–357

}

void cursorupdate()                                     // called every frame from hud
{
    ASSERT(editmode);
    if(cleanedit) return;
    flrceil = camera1->pitch >= 0 ? 2 : 0;
    editaxis = fabs(camera1->pitch) > 60 ? "\161\15\15"[flrceil] : "\160\13\14\157"[(int(camera1->yaw + 45) / 90) & 3];

    volatile float x = worldpos.x;                      // volatile needed to prevent msvc7 optimizer bug?
    volatile float y = worldpos.y;
    volatile float z = worldpos.z;

    cx = (int)x;
    cy = (int)y;

    if(OUTBORD(cx, cy))
    {
        forceinsideborders(cx);
        forceinsideborders(cy);
        return;
    }

    sqr *s = S(cx,cy);

    if(fabs(sheight(s,s,z)-z)>1)                        // selected wall
    {
        x += x>camera1->o.x ? 0.5f : -0.5f;             // find right wall cube
        y += y>camera1->o.y ? 0.5f : -0.5f;

        cx = (int)x;
        cy = (int)y;

        if(OUTBORD(cx, cy))
        {
            forceinsideborders(cx);
            forceinsideborders(cy);
            return;
        }
    }

    if(dragging) makesel(false);

    const int GRIDSIZE = 5;
    const float GRIDW = 0.5f;
    const float GRID8 = 2.0f;
    const float GRIDS = 2.0f;
    const int GRIDM = 0x7;

    static int lastsparkle = 0;
    bool sparkletime = lastmillis - lastsparkle >= 20;
    if(sparkletime) lastsparkle = lastmillis - (lastmillis%20);    // clip adding sparklies at 50 fps

    // render editing grid
    extern int blankouthud;

    if(showgrid && !blankouthud)
    {
        for(int ix = cx-GRIDSIZE; ix<=cx+GRIDSIZE; ix++) for(int iy = cy-GRIDSIZE; iy<=cy+GRIDSIZE; iy++)
        {