Drawing rectangle using Vector2 causes stuttering. Help.

1

I am using Primitives2D to draw basic shapes like rectangles for debugging. The library uses rectangles (ints) while I use floats for positioning and this causes stuttering when drawing.

demo
demo1024×576 103 KB

^ As you can see above (running at 0.01 timeScale)

And here’s the code

// Moving sample code
delta.X += _speed * Time.DeltaTime;
Transform.Position += delta;

// Drawing code
Vector2 upperLeft = Transform.Position - (SourceRectangle.Size.ToVector2() / 2);
spriteBatch.DrawRectangle(new Rectangle(upperLeft.ToPoint(), 
    SourceRectangle.Size), Color.Yellow);

Could anyone guide as to how to solve this float to int conversion problem. Thanks.

2

I don’t know anything about primitives2d but if its using ints you might have to make your own drawabler ectangle class.

Create one with 4 sides and use the spritebatch draw method that takes floats.

For the source rectangle use a 1 pixel white rectangle (off a spritesheet or create your own texture2d) then use a vector 2 as a scale in the spritebatch draw method. So for the top line if it needs to be 50 pixels wide and 2 pixels high use a vector2 50,2 for the scale

If your using a white pixel you can just change the colour in the spritebath draw method. Eg color.red

Its probably best to first create a single line class that will draw a basic line. Then in your rectangle class include 4 lines in it.

3

I’ve modified the Primitives2D class to draw rectangles using Vector2s instead of Rectangles and it works perfectly. Thanks.

4

Could you post the spriteBatch.Begin() code you’re using? Also what resolution your game is running and the size of the rectangle you’re drawing.