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Multiple Fractal tools (WIP) & simpler preview

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Starting with four tools:
 * No rotation, shrink to 50%
 * No rotation, grow to 150%
 * 15deg rotiation, grow to 110%
 * 90deg rotation, shrink to 75%

Don't redraw everything while sketching; do the recursive work once,
at the end (avoid CPU explosion).
This commit is contained in:
Bill Kendrick 2024-09-23 22:42:12 -07:00
parent 81ae8bdd36
commit ec835bb580
1 changed files with 15 additions and 5 deletions
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20
magic/src/fractal.c
View file

@ -33,6 +33,19 @@
#define NUM_TOOLS 4
typedef struct fract_opt_s {
float angle;
float scale;
} fract_opt_t;
fract_opt_t fract_opt[NUM_TOOLS] = {
{0, 0.5},
{0, 1.5},
{15, 1.1},
{90, 0.75},
};
typedef struct pt_s {
int x, y;
} pt_t;
@ -211,12 +224,9 @@ void do_fractal(magic_api * api, int which, SDL_Surface * canvas, int iter, floa
fractal_opacity_cur = opacity;
api->line((void *)api, which, canvas, NULL, (int) x1, (int) y1, (int) x2, (int) y2, (final ? 1 : 10), do_fractal_circle);
if ((i % ((num_pts / 3) + 1)) == 1)
if (final && ((i % ((num_pts / 3) + 1)) == 1) && (iter > 1))
{
if (iter > 1)
{
do_fractal(api, which, canvas, iter / 2, x2, y2, angle + (45.0 / 180.0 * M_PI), scale * 0.66, opacity * 0.66, final);
}
do_fractal(api, which, canvas, iter - 1, x2, y2, angle + (fract_opt[which].angle / 180.0 * M_PI), scale * fract_opt[which].scale, opacity * 0.5, final);
}
}
}