[SDL] How about an SDL_RenderFillQuad function?

Melker Narikka meklu at meklu.org
Fri Sep 30 06:11:14 PDT 2016

If you're not too worried about performance, you could draw a
rectangle into an SDL_Texture
and then draw it rotated with SDL_RenderCopyEx. Of course you'd have
to do a bit more
additional arithmetic yourself as the function takes an angle in degrees.

Melker Narikka

On Fri, Sep 30, 2016 at 3:37 PM, SeanOConnor <sean at windowsgames.co.uk> wrote:
> I need to draw a graph in my game but it looks like the SDL_RenderDrawLine
> only draws lines 1 pixel wide. With a bit of maths I can work out the 4
> points needed to draw a line of any width but the only SDL function that
> draws a primitive seems to be:
> SDL_RenderFillRect
> which only draws rectangles with no rotation.
> I'm guessing this SDL function just draws two triangles to make this
> rectangle based on the SDL_Rect it's sent, so surely it'd be trivial to
> create a new function SDL_RenderFillQuad that accepts four SDL_Points and
> draws two triangles based on that?
> And maybe an SDL_RenderFillTriangle too that takes three SDL_Points?
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