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vars done through 49. skipping twintrian for now.

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This commit is contained in:
Erik Reckase
2011-05-04 14:43:17 -06:00
parent 645222af47
commit d0084aab17
1 changed files with 123 additions and 0 deletions
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123
cuburn/code/variations.py
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@ -318,3 +318,126 @@ var(36, 'radial_blur', """
oy += ra*sinf(tmpa) + rz*ty;
""")
var(37, 'pie', """
float slices = {{px.get('xf.pie_slices')}};
float sl = truncf(mwc_next_01(rctx) * slices + 0.5f);
float a = {{px.get('xf.pie_rotation')}} +
2.0f * M_PI * (sl + mwc_next_01(rctx) + {{px.get('xf.pie_thickness')}} / slices;
float r = w * mwc_next_01(rctx);
ox += r * cosf(a);
oy += r * sinf(a);
""")
var(38, 'ngon', """
float power = {{px.get('xf.ngon_power')}} * 0.5f
float b = 2.0f * M_PI / {{px.get('xf.ngon_sides')}}
float corners = {{px.get('xf.ngon_corners')}}
float circle = {{px.get('xf.ngon_circle')}}
float r_factor = powf(tx*tx + ty*ty, power);
float theta = atan2f(ty, tx);
float phi = theta - b * floorf(theta/b);
if (phi > b/2.0f) phi -= b;
float amp = (corners * (1.0f / cosf(phi) - 1.0f) + circle) / r_factor;
ox += w * tx * amp;
oy += w * ty * amp;
"""}
var(39, 'curl', """
float c1 = {{px.get('xf.curl_c1')}};
float c2 = {{px.get('xf.curl_c2')}};
float re = 1.0f + c1*tx + c2*(tx*tx - ty*ty);
float im = c1*ty + 2.0f*c2*tx*ty;
float r = w / (re*re + im*im);
ox += r * (tx*re + ty*im);
oy += r * (ty*re + tx*im);
""")
var(40, 'rectangles', """
float rx = {{px.get('xf.rectangles_x')}};
float ry = {{px.get('xf.rectangles_y')}};
ox += w * ( (rx==0.0f) ? tx : rx * (2.0f * floorf(tx/rx) + 1.0f) - tx);
oy += w * ( (ry==0.0f) ? ty : ry * (2.0f * floorf(ty/ry) + 1.0f) - ty);
""")
var(41, 'arch', """
float ang = mwc_next_01(rctx) * w * M_PI;
ox += w * sinf(ang);
oy += w * sinf(ang) * sinf(ang) / cosf(ang);
""")
var(42, 'tangent', """
ox += w * sinf(tx) / cosf(ty);
oy += w * tanf(ty);
""")
var(43, 'square', """
ox += w * (mwc_next_01(rctx) - 0.5f);
oy += w * (mwc_next_01(rctx) - 0.5f);
""")
var(44, 'rays', """
float ang = w * mwc_next_01(rctx) * M_PI;
float r = w / (tx*tx + ty*ty);
float tanr = w * tanf(ang) * r;
ox += tanr * cosf(tx);
oy += tanr * sinf(ty);
""")
var(45, 'blade', """
float r = mwc_next_01(rctx) * w * sqrtf(tx*tx + ty*ty);
ox += w * tx * (cosf(r) + sinf(r));
oy += w * tx * (cosf(r) - sinf(r));
""")
var(46, 'secant2', """
float r = w * sqrtf(tx*tx + ty*ty);
float cr = cosf(r);
float icr = 1.0f / cr;
icr += (cr < 0 ? 1 : -1);
ox += w * tx;
oy += w * icr;
""")
# var 47 is twintrian, has a call to badvalue in it
var(48, 'cross', """
float s = tx*tx - ty*ty;
float r = w * sqrtf(1.0f / (s*s));
ox += r * tx;
oy += r * ty;
""")
var(49, 'disc2', """
float twist = {{px.get('xf.disc2_twist')}};
float rotpi = {{px.get('xf.disc2_rot * M_PI', 'disc2_rotpi')}};
float sintwist = sinf(twist);
float costwist = cosf(twist) - 1.0f;
if (twist > 2.0f * M_PI) {
float k = (1.0f + twist - 2.0f * M_PI);
sintwist *= k;
costwist *= k;
}
if (twist < -2.0f * M_PI) {
float k = (1.0f + twist + 2.0f * M_PI);
sintwist *= k;
costwist *= k;
}
float t = rotpi * (tx + ty);
float r = w * atan2f(tx, ty) / M_PI;
ox += r * (sinf(t) + costwist);
oy += r * (cosf(t) + sintwist);
""")