internal void RenderTexture(IntPtr textureHandle, float positionX, float positionY, int sourceWidth, int sourceHeight, double angle, Vector center)
{
Debug.Assert(textureHandle != IntPtr.Zero, Errors.E_TEXTURE_NULL);
// SDL only accepts integer positions (x,y) in the rendering Rect
SDL.SDL_Rect destinationRectangle = new SDL.SDL_Rect() { x = (int)positionX, y = (int)positionY, w = sourceWidth, h = sourceHeight };
SDL.SDL_Rect sourceRectangle = new SDL.SDL_Rect() { x = 0, y = 0, w = sourceWidth, h = sourceHeight };
SDL.SDL_Point centerPoint = new SDL.SDL_Point() { x = (int)center.X, y = (int)center.Y };
int result = SDL.SDL_RenderCopyEx(Handle, textureHandle, ref sourceRectangle, ref destinationRectangle, angle, ref centerPoint, SDL.SDL_RendererFlip.SDL_FLIP_NONE);
if (Utilities.IsError(result))
{
throw new Exception(Utilities.GetErrorMessage("SDL_RenderCopyEx"));
}
}
public void Draw(int x, int y, double angle, Vector center)
{
Assert.IsNotNull(Handle, Errors.E_TEXTURE_NULL);
Assert.IsNotNull(renderer, Errors.E_RENDERER_NULL);
renderer.RenderTexture(Handle, x, y, Width, Height, angle, center);
}
public Vector GetIntersectionDepth(Rectangle rectangle)
{
// Calculate half sizes.
float halfWidthA = this.Width / 2.0f;
float halfHeightA = this.Height / 2.0f;
float halfWidthB = rectangle.Width / 2.0f;
float halfHeightB = rectangle.Height / 2.0f;
// Calculate centers.
Vector centerA = new Vector(this.Left + halfWidthA, this.Top + halfHeightA);
Vector centerB = new Vector(rectangle.Left + halfWidthB, rectangle.Top + halfHeightB);
// Calculate current and minimum-non-intersecting distances between centers.
float distanceX = centerA.X - centerB.X;
float distanceY = centerA.Y - centerB.Y;
float minDistanceX = halfWidthA + halfWidthB;
float minDistanceY = halfHeightA + halfHeightB;
// If we are not intersecting at all, return (0, 0).
if (Math.Abs(distanceX) >= minDistanceX || Math.Abs(distanceY) >= minDistanceY)
return Vector.Zero;
// Calculate and return intersection depths.
float depthX = distanceX > 0 ? minDistanceX - distanceX : -minDistanceX - distanceX;
float depthY = distanceY > 0 ? minDistanceY - distanceY : -minDistanceY - distanceY;
return new Vector(depthX, depthY);
}
public bool Contains(Vector vector)
{
if (Left <= vector.X && Right >= vector.X && Top <= vector.Y && Bottom >= vector.Y)
return true;
else
return false;
}
public Vector Subtract(Vector vector)
{
float x = X - vector.X;
float y = Y - vector.Y;
return new Vector(x, y);
}
public Vector Add(Vector vector)
{
float x = X + vector.X;
float y = Y + vector.Y;
return new Vector(x, y);
}