Exemple #1
0
func (s *State) Visible(sprite *twodee.Sprite) bool {
	var (
		wb     = s.window.View.Sub(s.env.Bounds().Min)
		sb     = sprite.RelativeBounds(s.env)
		buffer = float32(256)
	)
	wb.Min.X -= buffer
	wb.Min.Y -= buffer
	wb.Max.X += buffer
	wb.Max.X += buffer
	return sb.Overlaps(wb)
}
Exemple #2
0
func (s *State) UpdateSprite(sprite *twodee.Sprite, ms float32) (result int) {
	sprite.VelocityY += 0.005 * ms // Gravity
	var (
		dX = sprite.VelocityX * ms
		dY = sprite.VelocityY * ms
		b  = sprite.RelativeBounds(s.env)
	)
	if b.Min.X+dX < 0 {
		result |= HITLEFT
		sprite.VelocityX = 0
		sprite.Move(twodee.Pt(1, 0))
		dX = 0
	}
	if b.Max.X+dX > s.env.Width() {
		/*
			fmt.Printf("HITRIGHT\n")
			fmt.Printf("sprite.RelativeBounds(s.env) %v\n", sprite.RelativeBounds(s.env))
			fmt.Printf("sprite.LocalBounds() %v\n", sprite.Bounds())
		*/
		result |= HITRIGHT
		sprite.VelocityX = 0
		sprite.Move(twodee.Pt(-1, 0))
		dX = 0
	}
	if sprite.Collide {
		for _, block := range s.boundaries {
			if dX != 0 && !sprite.TestMove(dX, 0, block) {
				if sprite.TestMove(dX, -block.Height(), block) {
					// Allows running up small bumps
					sprite.Move(twodee.Pt(0, -block.Height()))
				} else {
					if dX < 0 {
						sprite.MoveTo(twodee.Pt(block.X()+block.Width(), sprite.Y()))
						result |= HITLEFT
					} else {
						sprite.MoveTo(twodee.Pt(block.X()-sprite.Width(), sprite.Y()))
						result |= HITRIGHT
					}
					sprite.VelocityX = 0
					dX = 0
				}
			}
			if dY != 0 && !sprite.TestMove(0, dY, block) {
				if dY < 0 {
					sprite.MoveTo(twodee.Pt(sprite.X(), block.Y()+block.Height()))
					result |= HITTOP
				} else {
					sprite.MoveTo(twodee.Pt(sprite.X(), block.Y()-sprite.Height()))
					result |= HITBOTTOM
				}
				sprite.VelocityY = 0
				dY = 0
			}
		}
	}
	if dX != 0 || dY != 0 {
		sprite.Move(twodee.Pt(dX, dY))
	}
	//sprite.MoveTo(twodee.Pt(Round(sprite.X()), Round(sprite.Y())))
	return
}