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authorVito Caputo <vcaputo@pengaru.com>2022-04-29 23:47:09 -0700
committerVito Caputo <vcaputo@pengaru.com>2022-05-02 09:08:47 -0700
commitd1199af772011338f7419666911196bcb8d8d6a6 (patch)
treed91aadc1fdd1d663bfe7d760073ce01e3b0ee602 /src/modules/checkers/checkers.c
parent8292d95533801b41ee4b05edc0bf296394085528 (diff)
modules/checkers: add dynamics=sonar radiating wave
just another dynamic illumination pattern could use some more work like controlling the rate and thickness
Diffstat (limited to 'src/modules/checkers/checkers.c')
-rw-r--r--src/modules/checkers/checkers.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/src/modules/checkers/checkers.c b/src/modules/checkers/checkers.c
index 27da42b..c4e02c1 100644
--- a/src/modules/checkers/checkers.c
+++ b/src/modules/checkers/checkers.c
@@ -38,6 +38,7 @@ typedef enum checkers_dynamics_t {
CHECKERS_DYNAMICS_EVEN,
CHECKERS_DYNAMICS_ALTERNATING,
CHECKERS_DYNAMICS_RANDOM,
+ CHECKERS_DYNAMICS_SONAR,
} checkers_dynamics_t;
typedef struct checkers_setup_t {
@@ -49,6 +50,7 @@ typedef struct checkers_setup_t {
} checkers_setup_t;
typedef struct checkers_context_t {
+ unsigned tickoff;
checkers_setup_t setup;
} checkers_context_t;
@@ -73,6 +75,7 @@ static void * checkers_create_context(unsigned ticks, unsigned n_cpus, til_setup
return NULL;
ctxt->setup = *(checkers_setup_t *)setup;
+ ctxt->tickoff = ticks;
return ctxt;
}
@@ -142,6 +145,22 @@ static void checkers_render_fragment(void *context, unsigned ticks, unsigned cpu
case CHECKERS_DYNAMICS_RANDOM: /* note: the big multiply here is just to get up out of the low bits */
state &= hash(fragment->number * 0x61C88647 + (unsigned)((float)ticks * ctxt->setup.rate)) & 0x1;
break;
+ case CHECKERS_DYNAMICS_SONAR: {
+ float t = (float)((ticks - ctxt->tickoff) % 1000) * .001f * 2;
+ float dist_sq, x, y;
+
+ x = fragment->x + (fragment->width >> 1);
+ y = fragment->y + (fragment->height >> 1);
+ x = x / (float)fragment->frame_width * 2.f - 1.f;
+ y = y / (float)fragment->frame_height * 2.f - 1.f;
+
+ dist_sq = x * x + y * y;
+
+ t *= t;
+
+ state &= (dist_sq > (t - .1f) && dist_sq < (t + .1f));
+ break;
+ }
}
if (!state)
@@ -176,6 +195,7 @@ static int checkers_setup(const til_settings_t *settings, til_setting_t **res_se
"even",
"alternating",
"random",
+ "sonar",
NULL
};
const char *dynamics_rate_values[] = {
@@ -276,6 +296,8 @@ static int checkers_setup(const til_settings_t *settings, til_setting_t **res_se
setup->dynamics = CHECKERS_DYNAMICS_ALTERNATING;
else if (!strcmp(dynamics, "random"))
setup->dynamics = CHECKERS_DYNAMICS_RANDOM;
+ else if (!strcmp(dynamics, "sonar"))
+ setup->dynamics = CHECKERS_DYNAMICS_SONAR;
else {
free(setup);
return -EINVAL;
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