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Swizzle generation
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from xml.sax import saxutils | |
T = "xyzw" | |
def gen_1(text: str, t, file): | |
for t0 in t: | |
ts = "".join((t0,)) | |
file.add(text.format(lower=ts, upper=ts.upper(), t0=t0)) | |
def gen_2(text: str, t, file): | |
for t0 in t: | |
for t1 in t: | |
ts = "".join((t0, t1)) | |
file.add( | |
text.format(lower=ts, upper=ts.upper(), t0=t0, t1=t1), | |
) | |
def gen_3(text: str, t, file): | |
for t0 in t: | |
for t1 in t: | |
for t2 in t: | |
ts = "".join((t0, t1, t2)) | |
file.add( | |
text.format(lower=ts, upper=ts.upper(), t0=t0, t1=t1, t2=t2), | |
) | |
def gen_4(text: str, t, file): | |
for t0 in t: | |
for t1 in t: | |
for t2 in t: | |
for t3 in t: | |
ts = "".join((t0, t1, t2, t3)) | |
file.add( | |
text.format( | |
lower=ts, upper=ts.upper(), t0=t0, t1=t1, t2=t2, t3=t3 | |
), | |
) | |
gen_2_swizzle = "#define {upper}(v) ((struct vec2) {{v.{t0}, v.{t1} }})" | |
gen_3_swizzle = "#define {upper}(v) ((struct vec3) {{v.{t0}, v.{t1}, v.{t2} }})" | |
gen_4_swizzle = "#define {upper}(v) ((struct vec4) {{v.{t0}, v.{t1}, v.{t2}, v.{t3} }})" | |
class OrderedSet: | |
def __init__(self, **kwargs): | |
self._items = dict() | |
for item in kwargs: | |
self._items[item] = True | |
def add(self, item): | |
self._items[item] = True | |
def __iter__(self): | |
return iter(self._items.keys()) | |
with open("include/vul/vul_math_swizzle.h", "w", encoding="utf-8") as header: | |
s = OrderedSet() | |
gen_2(gen_2_swizzle, "xy", file=s) | |
gen_2(gen_2_swizzle, "xyz", file=s) | |
gen_2(gen_2_swizzle, "xyzw", file=s) | |
gen_3(gen_3_swizzle, "xy", file=s) | |
gen_3(gen_3_swizzle, "xyz", file=s) | |
gen_3(gen_3_swizzle, "xyzw", file=s) | |
gen_4(gen_4_swizzle, "xy", file=s) | |
gen_4(gen_4_swizzle, "xyz", file=s) | |
gen_4(gen_4_swizzle, "xyzw", file=s) | |
header.write("\n".join(s)) | |
header.write("\n") |
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