public void ShootLaser(GameTime gameTime, Vector3 shipPosition, Quaternion shipRotation)
{
double currentTime = gameTime.TotalGameTime.TotalMilliseconds;
if (currentTime - _lastBulletTime > DELAY_BETWEEN_LASERS)
{
LaserStruct newBullet = new LaserStruct();
newBullet.position = shipPosition;
newBullet.rotation = shipRotation;
_bulletList.Add(newBullet);
_lastBulletTime = currentTime;
shot.Play();
}
}
private void shootLaser()
{
// create the laser object
if (ship.canShoot && ship.lasers.Count < LASER_MAX)
{
LaserStruct tmp = new LaserStruct();
tmp.x = ship.x + 4 / 3 * ship.r * (float)Math.Cos(ship.a);
tmp.y = ship.y - 4 / 3 * ship.r * (float)Math.Sin(ship.a);
tmp.xv = LASER_SPD * (float)Math.Cos(ship.a) / FPS;
tmp.yv = -LASER_SPD * (float)Math.Sin(ship.a) / FPS;
tmp.dist = 0f;
tmp.explodeTime = 0;
ship.lasers.Add(tmp);
}
// prevent further shooting
ship.canShoot = false;
}
public CollisionType UpdateLaserAndCheckCollision(float moveSpeed, Vector3 spaceshipPosition, int spaceshipHealth)
{
for (int i = 0; i < _bulletList.Count; i++)
{
LaserStruct currentBullet = _bulletList[i];
MoveForward(ref currentBullet.position, currentBullet.rotation, moveSpeed * LASER_SPEED);
_bulletList[i] = currentBullet;
BoundingSphere bulletSphere = new BoundingSphere(currentBullet.position, 0.05f);
CollisionType colType = CheckCollision(bulletSphere, spaceshipPosition);
if (colType != CollisionType.None)
{
_bulletList.RemoveAt(i);
i--;
return(CollisionType.Laser);
}
}
return(CollisionType.None);
}
private void UpdateScene()
{
bool blinkOn = ship.blinkNum % 2 == 0;
bool exploding = ship.explodeTime > 0;
// gfx.DrawImage(Bitmap, new Rectangle(x, y, w, h));
gfx.Clear(Color.Transparent);
// Paint Asteroids
DrawTheAsteroids();
// thrust the ship
if (ship.thrusting && !ship.dead)
{
ship.thrustX += SHIP_THRUST * (float)Math.Cos(ship.a) / FPS;
ship.thrustY -= SHIP_THRUST * (float)Math.Sin(ship.a) / FPS;
}
else
{
// apply friction (slow the ship down when not thrusting)
ship.thrustX -= FRICTION * ship.thrustX / FPS;
if (Math.Abs(ship.thrustX) < 0.01f)
{
ship.thrustX = 0;
}
ship.thrustY -= FRICTION * ship.thrustY / FPS;
if (Math.Abs(ship.thrustY) < 0.01f)
{
ship.thrustY = 0;
}
}
// paint the ship
if (!exploding)
{
if (blinkOn && !ship.dead)
{
//drawShip(ship.x, ship.y, ship.a);
//PaintShip();
gfx.DrawImage(RotateImage(shipBMP, ship.a / (float)Math.PI * 180 * -1 + 90), ship.x - ship.r, ship.y - ship.r, ship.r * 2, ship.r * 2);
}
// handle blinking
if (ship.blinkNum > 0)
{
// reduce the blink time
ship.blinkTime--;
// reduce the blink num
if (ship.blinkTime == 0)
{
ship.blinkTime = (int)Math.Ceiling(SHIP_BLINK_DUR * FPS);
ship.blinkNum--;
}
}
}
else
{
// draw the explosion
gfx.DrawImage(res.BOOM, ship.x - ship.r, ship.y - ship.r, ship.r * 2, ship.r * 2);
}
// draw the lasers
for (var i = 0; i < ship.lasers.Count; i++)
{
if (ship.lasers[i].explodeTime == 0)
{
gfx.DrawArc(new Pen(Color.White, 1), ship.lasers[i].x, ship.lasers[i].y, SHIP_SIZE / 15f, SHIP_SIZE / 15f, 0, 360);
}
else
{
gfx.DrawArc(new Pen(Color.OrangeRed, 7), ship.lasers[i].x, ship.lasers[i].y, ship.r * 0.5f, ship.r * 0.5f, 0, 360);
}
}
// detect laser hits on asteroids
float ax, ay, ar, lx, ly;
for (int i = roids.Count - 1; i >= 0; i--)
{
// loop over the lasers
for (int j = ship.lasers.Count - 1; j >= 0; j--)
{
// detect hits
if (ship.lasers[j].explodeTime == 0 && distBetweenPoints(roids[i].x, roids[i].y, ship.lasers[j].x, ship.lasers[j].y) < roids[i].r)
{
// destroy the asteroid and activate the laser explosion
destroyAsteroid(i);
LaserStruct tmp = ship.lasers[j];
tmp.explodeTime = (int)Math.Ceiling(LASER_EXPLODE_DUR * FPS);
ship.lasers[j] = tmp;
break;
}
}
}
// handle edge of screen
HandleEdgeOfScreen();
// move the lasers
for (var i = ship.lasers.Count - 1; i >= 0; i--)
{
LaserStruct tmp = ship.lasers[i];
// check distance travelled
if (tmp.dist > LASER_DIST * SIZE_X)
{
//ship.lasers.splice(i, 1);
ship.lasers.RemoveAt(i);
continue;
}
// handle the explosion
if (ship.lasers[i].explodeTime > 0)
{
tmp.explodeTime--;
// destroy the laser after the duration is up
if (tmp.explodeTime == 0)
{
//ship.lasers.splice(i, 1);
ship.lasers.RemoveAt(i);
continue;
}
}
else
{
// move the laser
tmp.x += tmp.xv;
tmp.y += tmp.yv;
// calculate the distance travelled
tmp.dist += (float)Math.Sqrt(Math.Pow(tmp.xv, 2) + Math.Pow(tmp.yv, 2));
}
// handle edge of screen
if (tmp.x < 0)
{
tmp.x = SIZE_X;
}
else if (tmp.x > SIZE_X)
{
tmp.x = 0;
}
if (tmp.y < 0)
{
tmp.y = SIZE_Y;
}
else if (tmp.y > SIZE_Y)
{
tmp.y = 0;
}
ship.lasers[i] = tmp;
}
// Move asteroids
for (var i = 0; i < roids.Count; i++)
{
AsteroidStruct tmp = roids[i];
tmp.x += roids[i].xv;
tmp.y += roids[i].yv;
// handle asteroid edge of screen
if (roids[i].x < 0 - roids[i].r)
{
tmp.x = SIZE_X + roids[i].r;
}
else if (roids[i].x > SIZE_X + roids[i].r)
{
tmp.x = 0 - roids[i].r;
}
if (roids[i].y < 0 - roids[i].r)
{
tmp.y = SIZE_Y + roids[i].r;
}
else if (roids[i].y > SIZE_Y + roids[i].r)
{
tmp.y = 0 - roids[i].r;
}
roids[i] = tmp;
}
// show ship collision
// gfx.DrawArc(new Pen(Color.Red, 1), ship.x - (SHIP_SIZE / 2), ship.y - (SHIP_SIZE / 2), SHIP_SIZE, SHIP_SIZE, 0, 360);
PaintString("Кораблі: " + lives, 10, 10);
PaintString("Рівень: " + (level + 1), 10, 50);
//if (DateTime.Now.Second == 0 && SoundFlag) { PlaySoundFromRes(); SoundFlag = false; }
//if (DateTime.Now.Second == 1) SoundFlag = true;
if (!exploding)
{
// only check when not blinking
if (ship.blinkNum == 0 && !ship.dead)
{
for (var i = 0; i < roids.Count; i++)
{
if (distBetweenPoints(ship.x, ship.y, roids[i].x, roids[i].y) < ship.r + roids[i].r)
{
explodeShip();
destroyAsteroid(i);
break;
}
}
}
// paint thrusting
if (ship.thrusting && !ship.dead)
{
PaintShipThrust();
}
// rotate the ship
ship.a += ship.rot;
// move the ship
ship.x += ship.thrustX;
ship.y += ship.thrustY;
}
else
{
ship.explodeTime--;
// reset the ship after the explosion has finished
if (ship.explodeTime == 0)
{
lives--;
if (lives == 0)
{
gameOver();
}
else
{
ship = NewShip();
}
}
}
PaintString("Рахунок: " + score, 10, 30);
if (ship.dead)
{
PaintString(Color.Yellow, "F2 нова гра\n"
+ " F10 вихід");
}
pic.Image = finalImage;
//if (DateTime.Now.Second % 2 == 0) GC.Collect();
}
