genscale.py

# Hardcyber - PC-64k-Intro by Team210 at Deadline 2k19
# Copyright (C) 2019  Alexander Kraus <nr4@z10.info>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

lines = None
with open("sfx.frag", "rt") as f:
    lines = f.readlines()

pos_B = []
pos_t = []
pos_SPB = []
for line in lines:
    if 'const float pos_B[' in line:
        line = line.strip().split('(')[1].replace(');','').split(',')
        pos_B = [ float(entry) for entry in line ]
    if 'const float pos_SPB[' in line:
        line = line.strip().split('(')[1].replace(');','').split(',')
        pos_SPB = [ float(entry) for entry in line ]
    if 'const float pos_t[' in line:
        line = line.strip().split('(')[1].replace(');','').split(',')
        pos_t = [ float(entry) for entry in line ]

print('#version 130')
print('uniform float iTime;')
print('void scale(out float s)')
print('{')
nb_all = 0
for i in range(len(pos_B)-1):
    t_start = pos_t[i]
    t_end = pos_t[i+1]
    spb = pos_SPB[i]/4.
    #nbeats = mod(iTime, 60./29.);
    #iScale = nbeats-30./29.;
    #iScale = smoothstep(-5./29., 0., iScale)*(1.-smoothstep(0., 15./29., iScale));
    print('    if(iTime >= ',t_start,' && iTime < ',t_end,')')
    print('    {')
    print('        s = mod(iTime+.3-',t_start,',',spb,')-',.5*spb,';')
    print('        s = smoothstep(',-spb/12.,',0.,s)*(1.-smoothstep(0.,',spb/4.,',s));')
    print('    }')
print('}')