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-rw-r--r--src/physics.c190
1 files changed, 142 insertions, 48 deletions
diff --git a/src/physics.c b/src/physics.c
index fedc4c4..c7cc477 100644
--- a/src/physics.c
+++ b/src/physics.c
@@ -55,9 +55,48 @@ static void phy_calc_uec_E(float *uec, float dt, float fc0, float fc1,
uec[3] *= 1.0f / eps;
}
-static float remap(float x, float a0, float b0, float a1, float b1)
+
+static float phy_sim_csg_subsample(phy_csg_step *stack, float *x)
+{
+ phy_csg_step *step;
+ float rv = 1.0f;
+
+ for (step = stack; step; step = step->next) {
+ switch (step->shape) {
+ case CSG_SPHERE:
+ if (sq(x[0] - step->x[0]) + sq(x[1] - step->x[1]) +
+ sq(x[2] - step->x[2]) > sq(step->d[0]))
+ goto next_step;
+ break;
+ }
+
+ rv = step->value;
+
+ next_step:
+ ;
+ }
+
+ return rv;
+}
+
+static float phy_sim_csg_sample(phy_csg_step *stack, size_t *x)
{
- return (x - a0) * (b1 - a1) / (b0 - a0) + a1;
+ vec3_t xf = {x[0], x[1], x[2]};
+ size_t dx, dy, dz;
+ float total;
+
+ for (dz = 0; dz < 2; dz++)
+ for (dy = 0; dy < 2; dy++)
+ for (dx = 0; dx < 2; dx++) {
+ vec3_t xf;
+
+ v3_set(xf, x[0] + 0.5f * dx, x[1] + 0.5f * dy,
+ x[2] + 0.5f * dz);
+
+ total += phy_sim_csg_subsample(stack, xf);
+ }
+
+ return total / 8.0f;
}
static void phy_sim_zero_aux(phy_sim *sim)
@@ -68,6 +107,8 @@ static void phy_sim_zero_aux(phy_sim *sim)
memset(sim->aux, 0, fi->size1 * sizeof(phy_field_aux_point));
+ sim->eps_min = sim->eps_max = 1.0f;
+
for (x[2] = 1; x[2] < fi->dims[2] - 1; x[2]++)
for (x[1] = 1; x[1] < fi->dims[1] - 1; x[1]++)
for (x[0] = 1; x[0] < fi->dims[0] - 1; x[0]++) {
@@ -77,23 +118,14 @@ static void phy_sim_zero_aux(phy_sim *sim)
aux = sim->aux + x[2] * fi->zstr1 + x[1] * fi->ystr1 +
x[0] * fi->xstr1;
- aux->eps = 1;
- aux->mu = 1;
-
- if (0){
- float cx, cy, cz, cr, d;
+ aux->eps = phy_sim_csg_sample(sim->csg_stack, x);
- cx = 25, cy = 25, cz = 65;
- cr = 10;
+ if (aux->eps > sim->eps_max)
+ sim->eps_max = aux->eps;
+ if (aux->eps < sim->eps_min)
+ sim->eps_min = aux->eps;
- d = sqrt(sq(x[0] - cx) + sq(x[1] - cy) + sq(x[2] - cz));
-
- if (d < cr) {
- aux->eps = remap(d, cr, cr * 0.8, 1, 2);
- if (aux->eps > 2)
- aux->eps = 2;
- }
- }
+ aux->mu = 1;
v3_set(aux->int_curl_E, 0, 0, 0);
v3_set(aux->int_curl_H, 0, 0, 0);
@@ -122,6 +154,10 @@ static void phy_sim_zero(phy_sim *sim)
size_t i;
phy_field_info *fi;
+ sim->pml_widths[0] = con_var_get_size("pml_x");
+ sim->pml_widths[1] = con_var_get_size("pml_y");
+ sim->pml_widths[2] = con_var_get_size("pml_z");
+
fi = &sim->field_info;
for (i = 0; i < 3; i++) {
@@ -149,6 +185,18 @@ int phy_sim_create(phy_sim *sim)
con_var_set("depth", "50");
con_var_set("scale", "7e+9");
con_var_set("time_delta", "0.1");
+ con_var_set("pml_x", "0");
+ con_var_set("pml_y", "0");
+ con_var_set("pml_z", "0");
+
+ con_var_set("src_z", "10");
+ con_var_set("src_angle", "0");
+
+ con_var_set("csg_x", NULL);
+ con_var_set("csg_y", NULL);
+ con_var_set("csg_z", NULL);
+ con_var_set("csg_r", NULL);
+ con_var_set("csg_v", NULL);
phy_sim_create_fields(sim);
@@ -157,16 +205,28 @@ int phy_sim_create(phy_sim *sim)
void phy_sim_destroy(phy_sim *sim)
{
- size_t i;
-
+ phy_sim_csg_clear(sim);
+ phy_sim_destroy_fields(sim);
SDL_DestroyMutex(sim->rotate_lock);
-
itc_chan_destroy(&sim->ctl);
+}
+
+static void phy_sim_configure(phy_sim *sim)
+{
+ phy_field_info *fi = &sim->field_info;
+
+ fi->spacing = con_var_get_float("scale") /
+ min3(fi->dims[0], fi->dims[1], fi->dims[2]);
+ sim->time_delta = con_var_get_float("time_delta");
+
+ con_var_set("courant", va("%f", 3 * LIGHT_SPEED * sim->time_delta /
+ fi->spacing));
+
+ sim->source_xyplane.z = con_var_get_size("src_z");
+ sim->source_xyplane.Px = cos(DEG2RAD(con_var_get_float("src_angle")));
+ sim->source_xyplane.Py = sin(DEG2RAD(con_var_get_float("src_angle")));
+ sim->source_xyplane.enabled = true;
- for (i = 0; i < 3; i++) {
- free(sim->fields[i].E);
- free(sim->fields[i].H);
- }
}
int phy_sim_create_fields(phy_sim *sim)
@@ -179,29 +239,9 @@ int phy_sim_create_fields(phy_sim *sim)
fi->dims[0] = con_var_get_size("width");
fi->dims[1] = con_var_get_size("height");
fi->dims[2] = con_var_get_size("depth");
- fi->spacing = con_var_get_float("scale") /
- min3(fi->dims[0], fi->dims[1], fi->dims[2]);
- sim->time_delta = con_var_get_float("time_delta");
- con_var_set("courant", va("%f", 3 * LIGHT_SPEED * sim->time_delta /
- fi->spacing));
-
- #if 0
- sim->pml_widths[0] = 0;
- sim->pml_widths[1] = 0;
- sim->pml_widths[2] = fi->dims[2] / 5 * 1;
- #else
- sim->pml_widths[0] = 0;
- sim->pml_widths[1] = 0;
- sim->pml_widths[2] = 0;
- #endif
-
- sim->source_xyplane.z = fi->dims[2] / 2;//sim->pml_widths[2] + 5;
- sim->source_xyplane.Px = 0;
- sim->source_xyplane.Py = 1;
- sim->source_xyplane.lambda = 20;
- sim->source_xyplane.time = 2;
- sim->source_xyplane.enabled = true;
+ printf("phy_sim_create_fields: %zux%zux%zu\n",
+ fi->dims[0], fi->dims[1], fi->dims[2]);
fi->xstr = 3;
fi->ystr = fi->xstr * fi->dims[0];
@@ -228,6 +268,7 @@ int phy_sim_create_fields(phy_sim *sim)
goto error;
}
+ phy_sim_configure(sim);
phy_sim_zero(sim);
sim->running = false;
@@ -470,6 +511,44 @@ void phy_sim_step(phy_sim *sim) {
SDL_mutexV(sim->rotate_lock);
}
+void phy_sim_csg_push(phy_sim *sim)
+{
+ char *shape_str;
+ phy_csg_shape shape;
+ phy_csg_step *step;
+
+ // TODO shape_str = con_var_get("csg_shape");
+
+ shape = CSG_SPHERE;
+
+ step = malloc(sizeof(phy_csg_step));
+ assert(step);
+
+ step->next = sim->csg_stack;
+ sim->csg_stack = step;
+
+ step->value = con_var_get_float("csg_v");
+
+ switch (shape) {
+ case CSG_SPHERE:
+ step->x[0] = con_var_get_float("csg_x");
+ step->x[1] = con_var_get_float("csg_y");
+ step->x[2] = con_var_get_float("csg_z");
+ step->d[0] = con_var_get_float("csg_r");
+ break;
+ }
+}
+
+void phy_sim_csg_clear(phy_sim *sim)
+{
+ phy_csg_step *step, *next;
+
+ for (step = sim->csg_stack; step; step = next) {
+ next = step->next;
+ free(step);
+ }
+}
+
void phy_sim_debug(phy_sim *sim, size_t *coords)
{
phy_field_info *fi = &sim->field_info;
@@ -538,10 +617,25 @@ void phy_run_command(phy_sim *sim, int number, void *data)
case PHY_CMD_RESET:
SDL_LockMutex(sim->rotate_lock);
- phy_sim_destroy_fields(sim);
- phy_sim_create_fields(sim);
+ if (sim->field_info.dims[0] == con_var_get_size("width") &&
+ sim->field_info.dims[1] == con_var_get_size("height") &&
+ sim->field_info.dims[2] == con_var_get_size("depth")) {
+ phy_sim_configure(sim);
+ phy_sim_zero(sim);
+ } else {
+ phy_sim_destroy_fields(sim);
+ phy_sim_create_fields(sim);
+ }
SDL_UnlockMutex(sim->rotate_lock);
break;
+
+ case PHY_CMD_CSG_PUSH:
+ phy_sim_csg_push(sim);
+ break;
+
+ case PHY_CMD_CSG_CLEAR:
+ phy_sim_csg_clear(sim);
+ break;
}
}
generated by cgit (git 2.34.1) at 2024-12-26 05:35:00 +0000