From e42129241681dde7adae7d20697e7b421682fbb4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 18:23:22 +0200 Subject: Adding upstream version 2.10.22. Signed-off-by: Daniel Baumann --- plug-ins/flame/libifs.h | 87 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 plug-ins/flame/libifs.h (limited to 'plug-ins/flame/libifs.h') diff --git a/plug-ins/flame/libifs.h b/plug-ins/flame/libifs.h new file mode 100644 index 0000000..3cccf13 --- /dev/null +++ b/plug-ins/flame/libifs.h @@ -0,0 +1,87 @@ +/* + flame - cosmic recursive fractal flames + Copyright (C) 1992 Scott Draves + + 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 . +*/ + + +#ifndef libifs_included +#define libifs_included + +#include +#include +#include + +#include "cmap.h" + +#define EPS (1e-10) + +#define variation_random (-1) + +#define NVARS 29 +#define NXFORMS 6 + +typedef double point[3]; + +typedef struct { + double var[NVARS]; /* normalized interp coefs between variations */ + double c[3][2]; /* the coefs to the affine part of the function */ + double density; /* prob is this function is chosen. 0 - 1 */ + double color; /* color coord for this function. 0 - 1 */ +} xform; + +typedef struct { + xform xform[NXFORMS]; + clrmap cmap; + double time; + int cmap_index; + double brightness; /* 1.0 = normal */ + double contrast; /* 1.0 = normal */ + double gamma; + int width, height; /* of the final image */ + int spatial_oversample; + double center[2]; /* camera center */ + double zoom; /* effects ppu and sample density */ + double pixels_per_unit; /* and scale */ + double spatial_filter_radius; /* variance of gaussian */ + double sample_density; /* samples per pixel (not bucket) */ + /* in order to motion blur more accurately we compute the logs of the + sample density many times and average the results. we interpolate + only this many times. */ + int nbatches; + /* this much color resolution. but making it too high induces clipping */ + int white_level; + int cmap_inter; /* if this is true, then color map interpolates one entry + at a time with a bright edge */ + double pulse[2][2]; /* [i][0]=magnitude [i][1]=frequency */ + double wiggle[2][2]; /* frequency is /minute, assuming 30 frames/s */ +} control_point; + + + +extern void iterate(control_point *cp, int n, int fuse, point points[]); +extern void interpolate(control_point cps[], int ncps, double time, control_point *result); +extern void tokenize(char **ss, char *argv[], int *argc); +extern void print_control_point(FILE *f, control_point *cp, int quote); +extern void random_control_point(control_point *cp, int ivar); +extern void parse_control_point(char **ss, control_point *cp); +extern void estimate_bounding_box(control_point *cp, double eps, double *bmin, double *bmax); +extern double standard_metric(control_point *cp1, control_point *cp2); +extern double random_uniform01(void); +extern double random_uniform11(void); +extern double random_gaussian(void); +extern void mult_matrix(double s1[2][2], double s2[2][2], double d[2][2]); +void copy_variation(control_point *cp0, control_point *cp1); +#endif -- cgit v1.2.3