forked from tTh/FloatImg
58 lines
1.1 KiB
C
58 lines
1.1 KiB
C
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/*
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testing some random funcs.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include "../floatimg.h"
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/* --------------------------------------------------------------------- */
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int fimg_draw_something(FloatImg *fimg)
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{
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int x, y;
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float fx, fy;
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#define K (3.14159*13.456)
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#define M 100.0
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for (x=0; x<fimg->width; x++) {
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fimg_plot_rgb(fimg, x, 0,
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(float)x,
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(float)x + 5.678,
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(float)x * 1.33333);
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}
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for (y=1; y<fimg->height; y++) {
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fy = (float)y / (float)fimg->height;
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for (x=0; x<fimg->width; x++) {
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fx = (float)x / (float)fimg->width;
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fimg_plot_rgb(fimg, x, y,
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M*(cos(fx*K)+1.2),
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M*(cos(fy*K)+1.2),
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M*(cos(fx*fy)+1.2));
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}
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}
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return 0;
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}
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/* --------------------------------------------------------------------- */
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int fimg_multirandom(FloatImg *fimg)
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{
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int foo, x, y;
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#define RI ( (rand()/7) + (rand()/9) )
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#define RD ( (drand48()/7) + (drand48()/7) )
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for (foo=0; foo<100000000; foo++)
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{
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x = RI % fimg->width;
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y = RI % fimg->height;
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fimg_add_rgb(fimg, x, y, RD, RD, RD);
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}
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return 0;
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}
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/* --------------------------------------------------------------------- */
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