public static Point getDrawingOffset(Rectangle drawArea, Rectangle camera, LocationOverlap overlap)
{
switch (overlap)
{
case LocationOverlap.TopLeft:
return(new Point(camera.Left - drawArea.Left, camera.Top - drawArea.Top));
case LocationOverlap.TopRight:
return(new Point(drawArea.Right - camera.Right, camera.Top - drawArea.Top));
case LocationOverlap.BottomLeft:
return(new Point(camera.Left - drawArea.Left, drawArea.Bottom - camera.Bottom));
case LocationOverlap.BottomRight:
return(new Point(drawArea.Right - camera.Right, drawArea.Bottom - camera.Bottom));
case LocationOverlap.TopOnly:
return(new Point(0, camera.Top - drawArea.Top));
case LocationOverlap.LeftOnly:
return(new Point(camera.Left - drawArea.Left, 0));
case LocationOverlap.BottomOnly:
return(new Point(0, drawArea.Bottom - camera.Bottom));
case LocationOverlap.RightOnly:
return(new Point(drawArea.Right - camera.Right, 0));
default:
return(Point.Zero);
}
}
public static Rectangle getTexurePart(Rectangle area, Rectangle camera, Point offset, LocationOverlap overlap, Rectangle sourceRectangle, float zoomFactor)
{
Rectangle result;
Point size = new Point((int)((area.Width - offset.X) * zoomFactor), (int)((area.Height - offset.Y) * zoomFactor));
switch (overlap)
{
case LocationOverlap.TopLeft:
result = new Rectangle((int)(offset.X * zoomFactor), (int)(offset.Y * zoomFactor), size.X, size.Y);
break;
case LocationOverlap.TopRight:
result = new Rectangle(0, (int)(offset.Y * zoomFactor), size.X, size.Y);
break;
case LocationOverlap.BottomLeft:
result = new Rectangle((int)(offset.X * zoomFactor), 0, size.X, size.Y);
break;
case LocationOverlap.BottomRight:
result = new Rectangle(0, 0, size.X, size.Y);
break;
case LocationOverlap.TopOnly:
result = new Rectangle(0, (int)(offset.Y * zoomFactor), size.X, size.Y);
break;
case LocationOverlap.LeftOnly:
result = new Rectangle((int)(offset.X * zoomFactor), 0, size.X, size.Y);
break;
case LocationOverlap.BottomOnly:
result = new Rectangle(0, 0, size.X, size.Y);
break;
case LocationOverlap.RightOnly:
result = new Rectangle(0, 0, size.X, size.Y);
break;
default:
result = new Rectangle(0, 0, size.X, size.Y);
break;
}
//Apply the Texture offset if texture is multiframe
result.Offset(sourceRectangle.Location);
return(result);
}
public static Rectangle getTexurePart(Rectangle area, Rectangle camera, Point offset, LocationOverlap overlap, float zoomFactor)
{
return(getTexurePart(area, camera, offset, overlap, new Rectangle(0, 0, area.Width, area.Height), zoomFactor));
}
