Re: [pygame] Possible to detect collision with an image?

[Aaron Brady <castironpi@xxxxxxxxx>]

In that example, you need to detect a collision with any one of two
triangles or a circle, excluding the other two.  That could be a
useful function; it's not on the wiki.  Is that enough information?

Or, there are some strategies for only checking collisions with nearby
objects, if you need an optimization, that are on the wiki.  Are they
adequate?

On Fri, Oct 7, 2011 at 4:51 PM, Florian Krause
<siebenhundertzehn@xxxxxxxxx> wrote:
> Well, you could make the background of the image transparent and then
> create a mask fro the pygame surface. This one can be checked for
> collisions.
>
> Florian
>
>
>
> On Fri, Oct 7, 2011 at 11:44 PM, Alec Bennett <wrybread@xxxxxxxxx> wrote:
>> I'm using an image with transparency as a Sprite. The image has an irregular
>> shape:
>>
>> http://sinkingsensation.com/stuff/shape.png
>>
>> I'd like to detect collisions with it.
>>
>> My current strategy is to draw a polygon (pygame.draw.polygon) behind the
>> image. That works, but its difficult to make the polygon accurately reflect
>> the image, and I need to make a lot of them.
>>
>> So I'm wondering if there's some way to detect collisions with the image
>> itself?
>>
>> Or maybe there's some clever way to draw a polygon based on an image?
>>
>> I don't need pixel-by-pixel accuracy, anything close would work.
>>
>>
>>
>>
>
>
>
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