xforms for Chaotica
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<?xml version="1.0" encoding="utf-8"?>
<user_transforms>
<transform_def name="pringle">
<node name="input_params">
<real name="pringle">1</real>
<real name="pringle_a">0.5</real>
<real name="pringle_b">-1</real>
</node>
<node name="internal_params">
<real name="weight" />
<real name="a" />
<real name="b" />
</node>
<string name="winter_init_function">
<![CDATA[
pringle_init_result(pringle, pringle_a, pringle_b)
]]>
</string>
<string name="winter_eval_function">
<![CDATA[
mat2x2(sin(p_in.x), sin(p_in.y), cos(p_in.x), cos(p_in.y)) * vec2((a * p_in.x), (b * p_in.y)) * weight
]]>
</string>
</transform_def>
</user_transforms>