Ideas

[Ronald_Reagan]

Something I just quickly made for my AC_Platformer vid (probably not the "proper" way to do it). Replace cursorupdate() with this:

[SELECT ALL] Code:

VAR(drawgrid,0,0,1);

void cursorupdate()                                     // called every frame from hud
{
    flrceil = ((int)(camera1->pitch>=0))*2;
    int cyaw = ((int) camera1->yaw) % 180;
    editaxis = editmode ? (fabs(camera1->pitch) > 65 ? 13 : (cyaw < 45 || cyaw > 135 ? 12 : 11)) : 0;

    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)) return;
    //sqr *s = S(cx,cy);
    sqr *s = S(0,0);

    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)) return;
    }

    if(dragging) makesel();

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

    // render editing grid
    if (drawgrid==1)
    {
        for(int ix = cx-GRIDSIZE; ix<=cx+GRIDSIZE; ix++) for(int iy = cy-GRIDSIZE; iy<=cy+GRIDSIZE; iy++)
        {

            if(OUTBORD(ix, iy)) continue;
            sqr *s = S(ix,iy);
            if(SOLID(s)) continue;
            float h1 = sheight(s, s, z);
            float h2 = sheight(s, SWS(s,1,0,sfactor), z);
            float h3 = sheight(s, SWS(s,1,1,sfactor), z);
            float h4 = sheight(s, SWS(s,0,1,sfactor), z);
            if(s->tag) linestyle(GRIDW, 0xFF, 0x40, 0x40);
            else if(s->type==FHF || s->type==CHF) linestyle(GRIDW, 0x80, 0xFF, 0x80);
            else linestyle(GRIDW, 0x80, 0x80, 0x80);
            block b = { ix, iy, 1, 1 };
            box(b, h1, h2, h3, h4);
            linestyle(GRID8, 0x40, 0x40, 0xFF);
            if(!(ix&GRIDM))   line(ix,   iy,   h1, ix,   iy+1, h4);
            if(!((ix+1)&GRIDM)) line(ix+1, iy,   h2, ix+1, iy+1, h3);
            if(!(iy&GRIDM))   line(ix,   iy,   h1, ix+1, iy,   h2);
            if(!((iy+1)&GRIDM)) line(ix,   iy+1, h4, ix+1, iy+1, h3);
        }
        
    }
        if(selset)
        {
            linestyle(GRIDS, 0xFF, 0x40, 0x40);
            box(sel, (float)selh, (float)selh, (float)selh, (float)selh);
        }

        if(!SOLID(s))
        {
            float ih = sheight(s, s, z);
            linestyle(GRIDS, 0xFF, 0xFF, 0xFF);
            block b = { cx, cy, 1, 1 };
            box(b, ih, sheight(s, SWS(s,1,0,sfactor), z), sheight(s, SWS(s,1,1,sfactor), z), sheight(s, SWS(s,0,1,sfactor), z));
            linestyle(GRIDS, 0xFF, 0x00, 0x00);
            dot(cx, cy, ih);
            ch = (int)ih;
        }
    

        

        glLineWidth(1);
}

You probably want to change it to:
VAR(drawgrid,0,1,1);