Messages

1

Python / Re: Help with drawing on RenderTexture

« on: July 12, 2015, 06:51:40 pm »

Hello,

I tried both examples and they work fine (you just forgot to load a font in the second one) on my side, as you can see on this image : https://monosnap.com/file/AEn0kRJDZ8itWCbUasdy04DtMt75L3.png.

Have you tried to use another font ? What version of python and pysfml are you using ?

Thanks for the help. I thought I'd read that a default font would be used if one wasn't provided. The example code does work once one is provided. My own code (the first bit) didn't work because I didn't pay attention to the documentation.

It is important to note that the Sprite instance doesn’t copy the texture that it uses, it only keeps a reference to it. Thus, an Texture must not be destroyed while it is used by an Sprite.

My code was in the __init__ method of an object (which I failed to mention), so it was destroyed as soon as the method finished. When draw was called on the sprite, the texture it had a reference to no longer existed. Using something like self.tex instead works.

2

Python / Help with drawing on RenderTexture

« on: July 12, 2015, 06:26:39 am »

Basically i'm trying to draw to a RenderTexture and then use that texture in a sprite. But I can't get it to work.

txt = sf.Text('This is a test!')
txt.color = sf.Color.RED
txt.font = sf.Font.from_file('ProggyCleanSZ.ttf')
tex = sf.RenderTexture(200,200)
tex.clear(sf.Color.BLACK)
tex.draw(txt)
tex.display()
self.sprite.texture = tex.texture
 

The sprite is then drawn to the screen. The sprite shows up as a white box with no text, even though it was cleared with black. If I draw the text to the screen directly, there is no problem.

Even copying and pasting the example code from the documention doesn't work.

# create a new render-window
window = sf.RenderWindow(sf.VideoMode(800, 600), "pySFML - RenderWindow")

# create a new render-texture
texture = sf.RenderTexture(500, 500) #The example says RenderTexture.create(500,500) but that method doesn't exist.

# the main loop
while window.is_open:

   # ...

   # clear the whole texture with red color
   texture.clear(sf.Color.RED)

   # draw stuff to the texture
   text = sf.Text('Teenage Mutant Ninja Turtles')

   texture.draw(text)

   # we're done drawing to the texture
   texture.display()

   # now we start rendering to the window, clear it first
   window.clear()

   # draw the texture
   sprite = sf.Sprite(texture.texture)
   window.draw(sprite)

   # end the current frame and display its content on screen
   window.display()

This results in a red box on a black background and no text. No clue why this one actually clears with the right color.

I'm completely lost.