// SetObjectXY sets an objects x and y value.
func (a *Area) SetObjectXY(m Mover, x, y int) (col *Collision, err error) {
c := coord.Coord{x, y}
p := coord.Plane{a.Width, a.Height, 0, 0}
if !p.Contains(c) {
return nil, errutil.Newf("out of bounds.")
}
// remove the object from the old position, add to the new position and
// update both positions.
if !a.Terrain[x][y].IsPathable() {
return &Collision{a.Terrain[x][y], x, y}, nil
}
// test if an non-Pather object is already on that location.
if mob := a.Monsters[c]; mob != nil {
if !mob.IsPathable() {
return &Collision{mob, x, y}, nil
}
}
// Update old position.
c = coord.Coord{m.X(), m.Y()}
if a.Monsters[c] != nil {
a.Monsters[c] = nil
}
// Update new position.
m.SetX(x)
m.SetY(y)
c = coord.Coord{m.X(), m.Y()}
a.Monsters[c] = m
return nil, nil
}
func (a Area) drawMemory(x, y int, cameraX, cameraY int, scr screen.Screen) {
c := coord.Coord{x + scr.XOffset, y + scr.YOffset}
p := coord.Plane{scr.Width + scr.XOffset, scr.Height + scr.YOffset, scr.XOffset, scr.YOffset}
if !p.Contains(c) {
return
}
termbox.SetCell(x+scr.XOffset, y+scr.YOffset, a.Terrain[x+cameraX][y+cameraY].Graphic().Ch, termbox.ColorBlack+termbox.AttrBold, termbox.ColorDefault)
}
// DrawCell draws a drawable object to the screen.
func DrawCell(x, y int, d Drawable, scr screen.Screen) {
// Check if the coordinate exists on the plane.
// Since the screen isn't always located at (0, 0) we have to take
// the offsets into account.
c := coord.Coord{x + scr.XOffset, y + scr.YOffset}
p := coord.Plane{scr.Width + scr.XOffset, scr.Height + scr.YOffset, scr.XOffset, scr.YOffset}
if !p.Contains(c) {
return
}
termbox.SetCell(x+scr.XOffset, y+scr.YOffset, d.Graphic().Ch, d.Graphic().Fg, d.Graphic().Bg)
}
func (a Area) ExistsXY(x, y int) bool {
c := coord.Coord{x, y}
p := coord.Plane{a.Width, a.Height, 0, 0}
return p.Contains(c)
}