/// <summary>
/// A screen effect manager for creating effects such as screen flashes and fades.
/// </summary>
/// <param name="effectRectangle">The rectangle area to draw screen effects.</param>
public GenScreenEffect(Rectangle effectRectangle)
{
EffectRectangle = effectRectangle;
_fxTexture = new Texture2D(GenG.GraphicsDevice, 1, 1, false, SurfaceFormat.Color);
_fxTexture.SetData<Color>(new[] { Color.White });
_flashTimer = new GenTimer(0f, null);
_flashIntensity = 0f;
_fadeTimer = new GenTimer(0f, null);
}
/// <summary>
/// A camera occupies a space on the game screen to draw game objects.
/// An error will occur if the camera is positioned outside of the game window.
/// </summary>
/// <param name="x">The x position of the camera.</param>
/// <param name="y">The y position of the camera.</param>
/// <param name="width">The width of the camera.</param>
/// <param name="height">The height of the camera.</param>
/// <param name="zoom">The scale at which to draw objects in the camera.</param>
public GenCamera(float x, float y, int width, int height, float zoom)
{
_cameraRect = new Rectangle(0, 0, width, height);
_cameraView = new GenAABB(0f, 0f, width, height);
_centerPosition = new Vector2(_cameraView.MidpointX, _cameraView.MidpointY);
_up = new Vector2(0f, -1f);
RenderTarget = new RenderTarget2D(GenG.GraphicsDevice, width, height);
PixelRenderTarget = new RenderTarget2D(GenG.GraphicsDevice, width, height);
_backgroundTexture = GenU.MakeTexture(Color.White, 1, 1);
Color = Color.White;
BgColor = Color.Transparent;
_scroll = Vector2.Zero;
_oldScroll = _scroll;
_velocity = Vector2.Zero;
_rotation = 0f;
Origin = new Vector2(width * 0.5f, height * 0.5f);
Scale = Vector2.One;
_drawPosition = new Vector2(x + Origin.X, y + Origin.Y);
_initialZoom = zoom;
Zoom = _initialZoom;
CameraFollowType = FollowType.LockOn;
_followTargets = new List<GenObject>();
FollowPosition = Vector2.Zero;
FollowLeading = new Vector2(50, 30);
_followStrength = 1f;
MinZoom = _initialZoom;
MaxZoom = 4f;
_shakeOffset = Vector2.Zero;
_shakeIntensity = 0f;
_shakeDecreasing = false;
_shakeTimer = new GenTimer(0f, null);
SpriteEffect = SpriteEffects.None;
_cameraEffect = new GenScreenEffect(_cameraRect);
Transform = Matrix.Identity;
// Set up the default camera blend state as alpha blend.
BlendState = new BlendState();
BlendState.ColorSourceBlend = Blend.One;
BlendState.ColorDestinationBlend = Blend.InverseSourceAlpha;
BlendState.ColorBlendFunction = BlendFunction.Add;
BlendState.AlphaSourceBlend = Blend.One;
BlendState.AlphaDestinationBlend = Blend.InverseSourceAlpha;
BlendState.AlphaBlendFunction = BlendFunction.Add;
}
/// <param name="x">The x position of the sprite.</param>
/// <param name="y">The y position of the sprite.</param>
/// <param name="texture">The sprite texture.</param>
/// <param name="width">The width of the object.</param>
/// <param name="height">The height of the object.</param>
public GenSprite(float x, float y, Texture2D texture, int width, int height)
: base(x, y, width, height)
{
_sourceRect = new Rectangle(0, 0, width, height);
_texture = (texture != null) ? LoadTexture(texture, true) : null;
_drawPosition = Vector2.Zero;
Color = Color.White;
Alpha = 1f;
_drawColor = _color * _alpha;
DrawOffset = Vector2.Zero;
Scale = Vector2.One;
DrawRotated = true;
Animations = new Dictionary<string, GenAnimation>();
_currentAnimation = null;
_spriteEffect = SpriteEffects.None;
ScrollFactor = Vector2.One;
_flickerIntensity = 0f;
_flickerColor = Color.White;
_flickerPulsing = false;
_flickerIntensity = 0f;
_flickerTimer = new GenTimer(0f, null);
_flickerColor = Color.White;
_flickerPulsing = false;
_fadeTimer = new GenTimer(0f, null);
_fadeDirection = 1;
}
/// <summary>
/// Creates a playable animation for a sprite.
/// </summary>
/// <param name="sprite">A reference to the sprite that will use this animation.</param>
/// <param name="frameWidth">The width of each animation frame.</param>
/// <param name="frameHeight">The height of each animation frame.</param>
/// <param name="frames">The sequence of frame numbers of the animation. A value of null will play all frames of the animation texture.</param>
/// <param name="fps">The speed, in frames per second, of the animation.</param>
/// <param name="isLooping">Determines whether the animation is looping or not.</param>
/// <param name="frameSpacing">The amount of space, in pixels, between each of the animation frames.</param>
public GenAnimation(GenSprite sprite, int frameWidth, int frameHeight, int[] frames = null, int fps = 12, bool isLooping = true, int frameSpacing = 0)
{
_sprite = sprite;
Frames = (frames == null) ? new int[0] : frames;
_frameSpacing = frameSpacing;
_currentFrame = 0;
_position = Vector2.Zero;
_frameRect = new Rectangle(0, 0, frameWidth, frameHeight);
_frameTimer = new GenTimer(0f, UpdateFrame);
Fps = fps;
IsLooping = isLooping;
FrameCallback = null;
}
