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vars up to 67 complete

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This commit is contained in:
Erik Reckase 2011-05-05 05:48:53 -06:00
parent 9f78f5225a
commit 4f5d7efe27
1 changed files with 129 additions and 0 deletions
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129
cuburn/code/variations.py
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@ -553,3 +553,132 @@ var(57, 'butterfly', """
oy += r * y2;
""")
var(58, 'cell', """
float cell_size = {{px.get('xf.cell_size')}}
float inv_cell_size = 1.0f/cell_size;
/* calculate input cell */
float x = floorf(tx * inv_cell_size);
float y = floorf(ty * inv_cell_size);
/* Offset from cell origin */
float dx = tx - x*cell_size;
float dy = ty - y*cell_size;
/* interleave cells */
if (y >= 0.0f) {
if (x >= 0.0f) {
y *= 2.0f;
x *= 2.0f;
} else {
y *= 2.0f;
x = -(2.0f*x+1.0f);
}
} else {
if (x >= 0.0f) {
y = -(2.0f*y+1.0f);
x *= 2.0f;
} else {
y = -(2.0f*y+1.0f);
x = -(2.0f*x+1.0f);
}
}
ox += w * (dx + x*cell_size);
oy -= w * (dy + y*cell_size);
""")
var(59, 'cpow', """
float a = atan2f(ty, tx);
float lnr = 0.5f * logf(sqrtf(tx*tx+ty*ty));
float power = {{px.get('xf.cpow_power')}}
float va = 2.0f * M_PI / power;
float vc = {{px.get('xf.cpow_r')}} / power;
float vd = {{px.get('xf.cpow_i')}} / power;
float ang = vc*a + vd*lnr + va*floorf(power*mwc_next_01(rctx));
float m = w * expf(vc * lnr - vd * a);
ox += m * cosf(ang);
oy += m * sinf(ang);
""")
var(60, 'curve', """
float pc_xlen = {{px.get('xf.curve_xlength * xf.curve_xlength','pc_xlen')}};
float pc_ylen = {{px.get('xf.curve_ylength * xf.curve_ylength','pc_ylen')}};
if (pc_xlen<1E-20f) pc_xlen = 1E-20f;
if (pc_ylen<1E-20f) pc_ylen = 1E-20f;
ox += w * (tx + {{px.get('xf.curve_xamp')}} * expf(-ty*ty/pc_xlen));
ox += w * (ty + {{px.get('xf.curve_yamp')}} * expf(-tx*tx/pc_ylen));
""")
var(61, 'edisc', """
float tmp = tx*tx + ty*ty + 1.0f;
float tmp2 = 2.0f * tx;
float r1 = sqrtf(tmp+tmp2);
float r2 = sqrtf(tmp-tmp2);
float xmax = (r1+r2) * 0.5f;
float a1 = logf(xmax + sqrtf(xmax - 1.0f));
float a2 = -acosf(tx/xmax);
float neww = w / 11.57034632f;
float snv = sinf(a1);
float csv = cosf(a1);
if (ty > 0.0f) snv = -snv;
ox += neww * coshf(a2) * csv;
oy += neww * sinhf(s2) * snv;
""")
var(62, 'elliptic', """
float tmp = tx*tx + ty*ty + 1.0f;
float x2 = 2.0f * tx;
float xmax = 0.5f * (sqrtf(tmp+x2) + sqrtf(tmp-x2));
float a = tx / xmax;
float b = 1.0f - a*a;
float ssx = xmax - 1.0f;
float neww = w / M_PI_2;
if (b < 0.0f)
b = 0.0f;
else
b = sqrtf(b);
if (ssx < 0.0f)
ssx = 0.0f;
else
ssx = sqrtf(ssx);
ox += neww * atan2f(a,b);
if (ty > 0.0f)
oy += neww * logf(xmax + ssx);
else
oy -= neww * logf(xmax + ssx);
""")
var(63, 'escher', """
float a = atan2f(ty,tx);
float lnr = 0.5f * logf(tx*tx + ty*ty);
float ebeta = {{px.get('xf.escher_beta')}};
float seb = sinf(ebeta);
float ceb = cosf(ebeta);
float vc = 0.5f * (1.0f + ceb);
float vd = 0.5f * seb;
float m = w * expf(vc*lnr - vd*a);
float n = vc*a + vd*lnr;
ox += m * cosf(n);
oy += m * sinf(n);
""")
var(64, 'foci', """
float expx = expf(tx) * 0.5f;
float expnx = 0.25f / expx;
float sn = sinf(ty);
float cn = cosf(ty);
float tmp = w / (expx + expnx - cn);
ox += tmp * (expx - expnx);
oy += tmp * sn;
""")