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-rw-r--r--libdimension/csg.c47
1 files changed, 38 insertions, 9 deletions
diff --git a/libdimension/csg.c b/libdimension/csg.c
index 45701e5..8ba99d4 100644
--- a/libdimension/csg.c
+++ b/libdimension/csg.c
@@ -154,8 +154,11 @@ dmnsn_csg_intersection_intersection_fn(const dmnsn_object *csg, dmnsn_line line)
dmnsn_intersection *i1 = (*params[0]->intersection_fn)(params[0], line1);
dmnsn_intersection *i2 = (*params[1]->intersection_fn)(params[1], line2);
- if (i1) {
+ double oldt = 0.0;
+ while (i1) {
i1->ray = line;
+ i1->t += oldt;
+ oldt = i1->t;
i1->normal = dmnsn_vector_normalize(
dmnsn_vector_sub(
dmnsn_matrix_vector_mul(params[0]->trans, i1->normal),
@@ -171,13 +174,20 @@ dmnsn_csg_intersection_intersection_fn(const dmnsn_object *csg, dmnsn_line line)
dmnsn_vector point = dmnsn_line_point(i1->ray, i1->t);
point = dmnsn_matrix_vector_mul(params[1]->trans_inv, point);
if (!(*params[1]->inside_fn)(params[1], point)) {
+ line1.x0 = dmnsn_line_point(line1, i1->t);
+ line1 = dmnsn_line_add_epsilon(line1);
dmnsn_delete_intersection(i1);
- i1 = NULL;
+ i1 = (*params[0]->intersection_fn)(params[0], line1);
+ } else {
+ break;
}
}
- if (i2) {
+ oldt = 0.0;
+ while (i2) {
i2->ray = line;
+ i2->t += oldt;
+ oldt = i2->t;
i2->normal = dmnsn_vector_normalize(
dmnsn_vector_sub(
dmnsn_matrix_vector_mul(params[1]->trans, i2->normal),
@@ -193,8 +203,12 @@ dmnsn_csg_intersection_intersection_fn(const dmnsn_object *csg, dmnsn_line line)
dmnsn_vector point = dmnsn_line_point(i2->ray, i2->t);
point = dmnsn_matrix_vector_mul(params[0]->trans_inv, point);
if (!(*params[0]->inside_fn)(params[0], point)) {
+ line2.x0 = dmnsn_line_point(line2, i2->t);
+ line2 = dmnsn_line_add_epsilon(line2);
dmnsn_delete_intersection(i2);
- i2 = NULL;
+ i2 = (*params[1]->intersection_fn)(params[1], line2);
+ } else {
+ break;
}
}
@@ -203,7 +217,7 @@ dmnsn_csg_intersection_intersection_fn(const dmnsn_object *csg, dmnsn_line line)
if (!i2)
return i1;
- if (i1->t > i2->t) {
+ if (i1->t < i2->t) {
dmnsn_delete_intersection(i2);
return i1;
} else {
@@ -279,8 +293,11 @@ dmnsn_csg_merge_intersection_fn(const dmnsn_object *csg, dmnsn_line line)
dmnsn_intersection *i1 = (*params[0]->intersection_fn)(params[0], line1);
dmnsn_intersection *i2 = (*params[1]->intersection_fn)(params[1], line2);
- if (i1) {
+ double oldt = 0.0;
+ while (i1) {
i1->ray = line;
+ i1->t += oldt;
+ oldt = i1->t;
i1->normal = dmnsn_vector_normalize(
dmnsn_vector_sub(
dmnsn_matrix_vector_mul(params[0]->trans, i1->normal),
@@ -296,13 +313,20 @@ dmnsn_csg_merge_intersection_fn(const dmnsn_object *csg, dmnsn_line line)
dmnsn_vector point = dmnsn_line_point(i1->ray, i1->t);
point = dmnsn_matrix_vector_mul(params[1]->trans_inv, point);
if ((*params[1]->inside_fn)(params[1], point)) {
+ line1.x0 = dmnsn_line_point(line1, i1->t);
+ line1 = dmnsn_line_add_epsilon(line1);
dmnsn_delete_intersection(i1);
- i1 = NULL;
+ i1 = (*params[0]->intersection_fn)(params[0], line1);
+ } else {
+ break;
}
}
- if (i2) {
+ oldt = 0.0;
+ while (i2) {
i2->ray = line;
+ i2->t += oldt;
+ oldt = i2->t;
i2->normal = dmnsn_vector_normalize(
dmnsn_vector_sub(
dmnsn_matrix_vector_mul(params[1]->trans, i2->normal),
@@ -318,8 +342,13 @@ dmnsn_csg_merge_intersection_fn(const dmnsn_object *csg, dmnsn_line line)
dmnsn_vector point = dmnsn_line_point(i2->ray, i2->t);
point = dmnsn_matrix_vector_mul(params[0]->trans_inv, point);
if ((*params[0]->inside_fn)(params[0], point)) {
+ line2.x0 = dmnsn_line_point(line2, i2->t);
+ line2 = dmnsn_line_add_epsilon(line2);
dmnsn_delete_intersection(i2);
- i2 = NULL;
+ i2 = NULL; break;
+ i2 = (*params[1]->intersection_fn)(params[1], line2);
+ } else {
+ break;
}
}