Dear Chickeners! In my OpenGL and physics-simulation adventures I have fequently come across the need for a small math library in Chicken. I spent some time looking at the eggs out there, but some of them seemed a little overkill for my needs, so I decided to roll my own.
I was looking for: - binary compatible with C/OpenGL/GLSL data-storage (f32vectors and friends) - simple to use and short naming/syntax - can multiply/add etc vector/matrix - includes some transformation helpers like translate, rotate and scale - not a lot of dependencies In C++ land, it seems like GLM math library is popular, and it matches the criteria above (except language). A few days in, I've got a fairly functional math util egg: https://github.com/Adellica/chicken-glm Feedback is very welcome! In particular, because of all the different types (vec2, vec3, ivec2 etc), I wrote a template macro which does basic substring substitution: (template `((D 2 3 4)) (define (make-vecD fill) (make-f32vector D fill)) (define (make-dvecD fill) (make-f64vector D fill)) (define (make-ivecD fill) (make-s32vector D fill)) (define (make-uvecD fill) (make-u32vector D fill)) (define (make-bvecD fill) (make-u8vector D fill))) That will expand the body three times, each time substituting D with 2~4. This works quite nicely and saves me a lot of copy-paste, but I don't know if it's in the Scheme spirit. Any thoughts? Vectors use structures from srfi-4, and matrices get their own record (storing column-count along with its srfi-4 vector). Once chicken-glm stabelizes a little, I'd like to make it reachable from chicken-install. K.
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