private void RemoveObstacle(PolygonObstacle obstacle) {
if (obstacle == null) return;
_world.RemoveBody(obstacle.Body);
_obstacles.Remove(obstacle);
}
private void AddMenuObstacles() {
Vector2 pos = _menuPosition + new Vector2(20, 20);
for (int width = 1; width <= 2; width++) {
foreach (int rotate in new int[] { 0, 90, 180, 270 }) {
foreach (bool flip in new bool[] { false, true }) {
var obstacle = new PolygonObstacle(pos, width, rotate, flip, _world, false);
_menuObstacles.Add( obstacle );
pos = pos + new Vector2(obstacle.Width + 10, 0);
}
}
}
pos = _menuPosition + new Vector2(20, 150);
for (int red = 0; red <= 255; red += 127) {
for (int green = 0; green <= 255; green += 127) {
for (int blue = 0; blue <= 255; blue += 127) {
_colorObstacles.Add(new PolygonObstacle(pos, 1, 0, false, _world, new Color(red, green, blue), false));
pos = pos + new Vector2(40, 0);
}
}
}
}
private void HandleMouseInput(InputState input) {
// Press left button down: start drag
if (input.LastMouseState.LeftButton == ButtonState.Released &&
input.CurrentMouseState.LeftButton == ButtonState.Pressed) {
if (input.LastKeyboardState.IsKeyDown(Keys.LeftShift) && _selectedMenuObstacle != null && _selectedColorObstacle != null) {
_obstacles.Add(_selectedMenuObstacle.Clone(CoarsePosition(MouseWorldPos), _selectedColorObstacle.Color, _world));
} else {
if (ObstacleAt(MouseWorldPos, _obstacles) != null) {
_draggedObstacle = ObstacleAt(MouseWorldPos, _obstacles);
} else if (ObstacleAt(MouseScreenPos, _menuObstacles) != null) {
_selectedMenuObstacle = ObstacleAt(MouseScreenPos, _menuObstacles);
} else if (ObstacleAt(MouseScreenPos, _colorObstacles) != null) {
_selectedColorObstacle = ObstacleAt(MouseScreenPos, _colorObstacles);
}
}
}
// Lift left button up: end drag
else if (_input.LastMouseState.LeftButton == ButtonState.Pressed &&
_input.CurrentMouseState.LeftButton == ButtonState.Released) {
_draggedObstacle = null;
} else if (_input.LastMouseState.RightButton == ButtonState.Released &&
_input.CurrentMouseState.RightButton == ButtonState.Pressed) {
RemoveObstacle(ObstacleAt(MouseWorldPos, _obstacles));
}
// Move picked obstacle
if (_draggedObstacle != null) {
_draggedObstacle.Position = CoarsePosition(MouseWorldPos);
}
}
