karma/flying-balls
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added colors.

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This commit is contained in:
Antonio Carzaniga 2019-06-05 14:31:11 +02:00
parent c0b9e71eef
commit 229b681e2c
1 changed files with 7 additions and 2 deletions
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9
balls.c
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@ -18,6 +18,8 @@ struct ball {
double v_x; double v_x;
double v_y; double v_y;
guchar rgb_channels[3];
}; };
static double delta = 0.01; static double delta = 0.01;
@ -49,6 +51,9 @@ void balls_init_state () {
balls[i].v_x = v_min + rand() % (v_max + 1 - v_min); balls[i].v_x = v_min + rand() % (v_max + 1 - v_min);
balls[i].v_y = v_min + rand() % (v_max + 1 - v_min); balls[i].v_y = v_min + rand() % (v_max + 1 - v_min);
balls[i].radius = radius_min + rand() % (radius_max + 1 - radius_min); balls[i].radius = radius_min + rand() % (radius_max + 1 - radius_min);
balls[i].rgb_channels[0] = rand() % 256;
balls[i].rgb_channels[1] = rand() % 256;
balls[i].rgb_channels[2] = rand() % 256;
} }
} }
@ -178,8 +183,8 @@ static void do_draw (GtkWidget * widget) {
int radius2_dy2 = balls[i].radius*balls[i].radius - (y - balls[i].y)*(y - balls[i].y); int radius2_dy2 = balls[i].radius*balls[i].radius - (y - balls[i].y)*(y - balls[i].y);
for (int x = x0; x < x1; ++x) { for (int x = x0; x < x1; ++x) {
if ((x - balls[i].x)*(x - balls[i].x) <= radius2_dy2) if ((x - balls[i].x)*(x - balls[i].x) <= radius2_dy2)
for(int i = 0; i < n_channels; ++i) for(int c = 0; c < n_channels; ++c)
*px++ = 255; *px++ = balls[i].rgb_channels[c];
else else
px += n_channels; px += n_channels;
} }