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Dithering

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This commit is contained in:
Steven Robertson 2011-05-03 15:26:05 -04:00
parent 8ee5d3edd8
commit 28c3c72bb8
1 changed files with 7 additions and 5 deletions
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12
cuburn/code/iter.py
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@ -108,9 +108,11 @@ void iter(mwc_st *msts, iter_info *infos, float *accbuf, float *denbuf) {
continue; continue;
} }
// TODO: dither? float ditherx = mwc_next_11(&rctx) * 0.5f;
int i = ((int)((y + 0.5f) * 1023.0f) * 1024) float dithery = mwc_next_11(&rctx) * 0.5f;
+ (int)((x + 0.5f) * 1023.0f) + 1025;
int i = ((int)((y + 0.5f) * 1022.0f + ditherx) * 1024)
+ (int)((x + 0.5f) * 1022.0f + dithery) + 1025;
// since info was declared const, C++ barfs unless it's loaded first // since info was declared const, C++ barfs unless it's loaded first
float cp_step_frac = {{packer.get('cp_step_frac')}}; float cp_step_frac = {{packer.get('cp_step_frac')}};
@ -129,7 +131,7 @@ void iter(mwc_st *msts, iter_info *infos, float *accbuf, float *denbuf) {
def silly(features, cps): def silly(features, cps):
nsteps = 500 nsteps = 1000
abuf = np.zeros((1024, 1024, 4), dtype=np.float32) abuf = np.zeros((1024, 1024, 4), dtype=np.float32)
dbuf = np.zeros((1024, 1024), dtype=np.float32) dbuf = np.zeros((1024, 1024), dtype=np.float32)
seeds = mwc.MWC.make_seeds(512 * nsteps) seeds = mwc.MWC.make_seeds(512 * nsteps)
@ -191,7 +193,7 @@ def silly(features, cps):
k1 = cp.contrast * cp.brightness * 268 / 256 k1 = cp.contrast * cp.brightness * 268 / 256
area = 1 area = 1
k2 = 1 / (cp.contrast * 5000) k2 = 1 / (cp.contrast * (5 * nsteps))
fun = mod.get_function("logfilt") fun = mod.get_function("logfilt")
t = fun(abufd, f(k1), f(k2), t = fun(abufd, f(k1), f(k2),