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-rw-r--r--libdimension/csg.c94
-rw-r--r--libdimension/dimension/object.h3
-rw-r--r--libdimension/object.c5
-rw-r--r--libdimension/plane.c2
-rw-r--r--libdimension/prtree.c26
5 files changed, 68 insertions, 62 deletions
diff --git a/libdimension/csg.c b/libdimension/csg.c
index eb7f2c5..ee77739 100644
--- a/libdimension/csg.c
+++ b/libdimension/csg.c
@@ -18,7 +18,7 @@
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
-#include "dimension.h"
+#include "dimension_impl.h"
#include <stdlib.h>
/* Apply the properties of `csg' to its children */
@@ -38,16 +38,6 @@ dmnsn_csg_cascade(const dmnsn_object *csg, dmnsn_object *object)
object->trans = dmnsn_matrix_mul(csg->trans, object->trans);
}
-/* Generic CSG free function */
-static void
-dmnsn_csg_free_fn(void *ptr)
-{
- dmnsn_object **params = ptr;
- dmnsn_delete_object(params[1]);
- dmnsn_delete_object(params[0]);
- free(ptr);
-}
-
/* Unions */
static bool
@@ -55,58 +45,38 @@ dmnsn_csg_union_intersection_fn(const dmnsn_object *csg,
dmnsn_line line,
dmnsn_intersection *intersection)
{
- const dmnsn_object **params = csg->ptr;
-
- dmnsn_intersection i1, i2;
- bool is_i1 = (*params[0]->intersection_fn)(params[0], line, &i1);
- bool is_i2 = (*params[1]->intersection_fn)(params[1], line, &i2);
-
- if (is_i1 && is_i2) {
- if (i1.t < i2.t) {
- *intersection = i1;
- } else {
- *intersection = i2;
- }
- } else if (is_i1) {
- *intersection = i1;
- } else if (is_i2) {
- *intersection = i2;
- } else {
- return false;
- }
-
- intersection->ray = line;
- intersection->normal = dmnsn_transform_normal(csg->trans,
- intersection->normal);
- return true;
+ dmnsn_prtree *prtree = csg->ptr;
+ return dmnsn_prtree_search(prtree, line, intersection);
}
static bool
dmnsn_csg_union_inside_fn(const dmnsn_object *csg, dmnsn_vector point)
{
- dmnsn_object **params = csg->ptr;
- return (*params[0]->inside_fn)(params[0], point)
- || (*params[1]->inside_fn)(params[1], point);
+ DMNSN_ARRAY_FOREACH (dmnsn_object **, child, csg->children) {
+ if (((*child)->inside_fn)(*child, point))
+ return true;
+ }
+ return false;
}
static void
dmnsn_csg_union_init_fn(dmnsn_object *csg)
{
- dmnsn_object **params = csg->ptr;
- dmnsn_object *A = params[0];
- dmnsn_object *B = params[1];
-
- dmnsn_csg_cascade(csg, A);
- dmnsn_csg_cascade(csg, B);
+ DMNSN_ARRAY_FOREACH (dmnsn_object **, child, csg->children) {
+ dmnsn_csg_cascade(csg, *child);
+ dmnsn_object_init(*child);
+ }
+ csg->trans = dmnsn_identity_matrix();
- dmnsn_object_init(A);
- dmnsn_object_init(B);
+ dmnsn_prtree *prtree = dmnsn_new_prtree(csg->children);
+ csg->ptr = prtree;
+ csg->bounding_box = prtree->root->bounding_box;
+}
- csg->trans = dmnsn_identity_matrix();
- csg->bounding_box.min
- = dmnsn_vector_min(A->bounding_box.min, B->bounding_box.min);
- csg->bounding_box.max
- = dmnsn_vector_max(A->bounding_box.max, B->bounding_box.max);
+static void
+dmnsn_csg_union_free_fn(void *ptr)
+{
+ dmnsn_delete_prtree(ptr);
}
dmnsn_object *
@@ -114,19 +84,26 @@ dmnsn_new_csg_union(dmnsn_object *A, dmnsn_object *B)
{
dmnsn_object *csg = dmnsn_new_object();
- dmnsn_object **params = dmnsn_malloc(2*sizeof(dmnsn_object *));
- params[0] = A;
- params[1] = B;
-
- csg->ptr = params;
+ dmnsn_array_push(csg->children, &A);
+ dmnsn_array_push(csg->children, &B);
csg->intersection_fn = &dmnsn_csg_union_intersection_fn;
csg->inside_fn = &dmnsn_csg_union_inside_fn;
csg->init_fn = &dmnsn_csg_union_init_fn;
- csg->free_fn = &dmnsn_csg_free_fn;
+ csg->free_fn = &dmnsn_csg_union_free_fn;
return csg;
}
+/* Generic CSG free function */
+static void
+dmnsn_csg_free_fn(void *ptr)
+{
+ dmnsn_object **params = ptr;
+ dmnsn_delete_object(params[1]);
+ dmnsn_delete_object(params[0]);
+ free(ptr);
+}
+
/* Generic CSG intersection function */
static bool
dmnsn_csg_intersection_fn(const dmnsn_object *csg, dmnsn_line line,
@@ -190,9 +167,6 @@ dmnsn_csg_intersection_fn(const dmnsn_object *csg, dmnsn_line line,
return false;
}
- intersection->ray = line;
- intersection->normal = dmnsn_transform_normal(csg->trans,
- intersection->normal);
return true;
}
diff --git a/libdimension/dimension/object.h b/libdimension/dimension/object.h
index 11847b0..5cc62a1 100644
--- a/libdimension/dimension/object.h
+++ b/libdimension/dimension/object.h
@@ -69,6 +69,9 @@ struct dmnsn_object {
/* Bounding box */
dmnsn_bounding_box bounding_box;
+ /* Child objects */
+ dmnsn_array *children;
+
/* Callback functions */
dmnsn_object_init_fn *init_fn;
dmnsn_object_intersection_fn *intersection_fn;
diff --git a/libdimension/object.c b/libdimension/object.c
index a714f6e..d87eb12 100644
--- a/libdimension/object.c
+++ b/libdimension/object.c
@@ -40,6 +40,7 @@ dmnsn_new_object()
object->texture = NULL;
object->interior = NULL;
object->trans = dmnsn_identity_matrix();
+ object->children = dmnsn_new_array(sizeof(dmnsn_object *));
object->init_fn = NULL;
object->free_fn = NULL;
return object;
@@ -50,6 +51,10 @@ void
dmnsn_delete_object(dmnsn_object *object)
{
if (object) {
+ DMNSN_ARRAY_FOREACH (dmnsn_object **, child, object->children) {
+ dmnsn_delete_object(*child);
+ }
+ dmnsn_delete_array(object->children);
dmnsn_delete_interior(object->interior);
dmnsn_delete_texture(object->texture);
if (object->free_fn) {
diff --git a/libdimension/plane.c b/libdimension/plane.c
index 08da44c..76071df 100644
--- a/libdimension/plane.c
+++ b/libdimension/plane.c
@@ -75,7 +75,7 @@ dmnsn_plane_intersection_fn(const dmnsn_object *plane, dmnsn_line line,
return false;
}
-/* Return whether a point is inside a plane (x**2 + y**2 + z**2 < 1.0) */
+/* Return whether a point is inside a plane */
static bool
dmnsn_plane_inside_fn(const dmnsn_object *plane, dmnsn_vector point)
{
diff --git a/libdimension/prtree.c b/libdimension/prtree.c
index b99c7e1..7fcc8ab 100644
--- a/libdimension/prtree.c
+++ b/libdimension/prtree.c
@@ -436,6 +436,30 @@ dmnsn_pseudo_prtree_leaves(const dmnsn_pseudo_prtree *pseudo)
return leaves;
}
+/* Add objects from an array to a list, splitting unions etc. */
+
+static void
+dmnsn_list_add_object(dmnsn_list *objects, const dmnsn_object *object)
+{
+ if (dmnsn_array_size(object->children) == 0) {
+ dmnsn_list_push(objects, &object);
+ } else {
+ DMNSN_ARRAY_FOREACH (const dmnsn_object **, child, object->children) {
+ dmnsn_list_add_object(objects, *child);
+ }
+ }
+}
+
+static dmnsn_list *
+dmnsn_object_list(const dmnsn_array *objects)
+{
+ dmnsn_list *list = dmnsn_new_list(sizeof(dmnsn_object *));
+ DMNSN_ARRAY_FOREACH (const dmnsn_object **, object, objects) {
+ dmnsn_list_add_object(list, *object);
+ }
+ return list;
+}
+
/* Split the unbounded objects into a new list */
static dmnsn_list *
dmnsn_split_unbounded(dmnsn_list *objects)
@@ -464,7 +488,7 @@ dmnsn_split_unbounded(dmnsn_list *objects)
dmnsn_prtree *
dmnsn_new_prtree(const dmnsn_array *objects)
{
- dmnsn_list *leaves = dmnsn_list_from_array(objects);
+ dmnsn_list *leaves = dmnsn_object_list(objects);
dmnsn_list *unbounded = dmnsn_split_unbounded(leaves);
dmnsn_pseudo_prtree *pseudo = dmnsn_new_pseudo_prtree(leaves, true, 0);