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-rw-r--r--dimension/realize.c236
1 files changed, 209 insertions, 27 deletions
diff --git a/dimension/realize.c b/dimension/realize.c
index fde751a..e70f1e3 100644
--- a/dimension/realize.c
+++ b/dimension/realize.c
@@ -659,6 +659,8 @@ dmnsn_realize_object_modifiers(dmnsn_astnode astnode, dmnsn_object *object)
}
}
+static dmnsn_object *dmnsn_realize_object(dmnsn_astnode astnode);
+
static dmnsn_object *
dmnsn_realize_box(dmnsn_astnode astnode)
{
@@ -695,27 +697,6 @@ dmnsn_realize_box(dmnsn_astnode astnode)
return box;
}
-static dmnsn_light *
-dmnsn_realize_light_source(dmnsn_astnode astnode)
-{
- dmnsn_assert(astnode.type == DMNSN_AST_LIGHT_SOURCE,
- "Expected a light source.");
-
- dmnsn_astnode point, color_node;
- dmnsn_array_get(astnode.children, 0, &point);
- dmnsn_array_get(astnode.children, 1, &color_node);
-
- dmnsn_vector x0 = dmnsn_realize_vector(point);
- dmnsn_color color = dmnsn_realize_color(color_node);
-
- dmnsn_light *light = dmnsn_new_point_light(x0, color);
- if (!light) {
- dmnsn_error(DMNSN_SEVERITY_HIGH, "Couldn't allocate light.");
- }
-
- return light;
-}
-
static dmnsn_object *
dmnsn_realize_sphere(dmnsn_astnode astnode)
{
@@ -743,6 +724,207 @@ dmnsn_realize_sphere(dmnsn_astnode astnode)
return sphere;
}
+static dmnsn_object *
+dmnsn_realize_union(dmnsn_astnode astnode)
+{
+ dmnsn_assert(astnode.type == DMNSN_AST_UNION, "Expected a union.");
+
+ dmnsn_astnode objects;
+ dmnsn_array_get(astnode.children, 0, &objects);
+
+ dmnsn_astnode o1node, o2node;
+ dmnsn_array_get(objects.children, 0, &o1node);
+ dmnsn_array_get(objects.children, 1, &o2node);
+
+ dmnsn_object *o1 = dmnsn_realize_object(o1node);
+ dmnsn_object *o2 = dmnsn_realize_object(o2node);
+
+ dmnsn_object *csg = dmnsn_new_csg_union(o1, o2);
+ if (!csg) {
+ dmnsn_error(DMNSN_SEVERITY_HIGH, "Couldn't allocate union.");
+ }
+
+ unsigned int i;
+ for (i = 2; i < dmnsn_array_size(objects.children); ++i) {
+ dmnsn_astnode onode;
+ dmnsn_array_get(objects.children, i, &onode);
+
+ dmnsn_object *object = dmnsn_realize_object(onode);
+ csg = dmnsn_new_csg_union(csg, object);
+ if (!csg) {
+ dmnsn_error(DMNSN_SEVERITY_HIGH, "Couldn't allocate union.");
+ }
+ }
+
+ dmnsn_astnode modifiers;
+ dmnsn_array_get(astnode.children, 1, &modifiers);
+ dmnsn_realize_object_modifiers(modifiers, csg);
+
+ return csg;
+}
+
+static dmnsn_object *
+dmnsn_realize_intersection(dmnsn_astnode astnode)
+{
+ dmnsn_assert(astnode.type == DMNSN_AST_INTERSECTION,
+ "Expected an intersection.");
+
+ dmnsn_astnode objects;
+ dmnsn_array_get(astnode.children, 0, &objects);
+
+ dmnsn_astnode o1node, o2node;
+ dmnsn_array_get(objects.children, 0, &o1node);
+ dmnsn_array_get(objects.children, 1, &o2node);
+
+ dmnsn_object *o1 = dmnsn_realize_object(o1node);
+ dmnsn_object *o2 = dmnsn_realize_object(o2node);
+
+ dmnsn_object *csg = dmnsn_new_csg_intersection(o1, o2);
+ if (!csg) {
+ dmnsn_error(DMNSN_SEVERITY_HIGH, "Couldn't allocate intersection.");
+ }
+
+ unsigned int i;
+ for (i = 2; i < dmnsn_array_size(objects.children); ++i) {
+ dmnsn_astnode onode;
+ dmnsn_array_get(objects.children, i, &onode);
+
+ dmnsn_object *object = dmnsn_realize_object(onode);
+ csg = dmnsn_new_csg_intersection(csg, object);
+ if (!csg) {
+ dmnsn_error(DMNSN_SEVERITY_HIGH, "Couldn't allocate intersection.");
+ }
+ }
+
+ dmnsn_astnode modifiers;
+ dmnsn_array_get(astnode.children, 1, &modifiers);
+ dmnsn_realize_object_modifiers(modifiers, csg);
+
+ return csg;
+}
+
+static dmnsn_object *
+dmnsn_realize_difference(dmnsn_astnode astnode)
+{
+ dmnsn_assert(astnode.type == DMNSN_AST_DIFFERENCE, "Expected a difference.");
+
+ dmnsn_astnode objects;
+ dmnsn_array_get(astnode.children, 0, &objects);
+
+ dmnsn_astnode o1node, o2node;
+ dmnsn_array_get(objects.children, 0, &o1node);
+ dmnsn_array_get(objects.children, 1, &o2node);
+
+ dmnsn_object *o1 = dmnsn_realize_object(o1node);
+ dmnsn_object *o2 = dmnsn_realize_object(o2node);
+
+ dmnsn_object *csg = dmnsn_new_csg_difference(o1, o2);
+ if (!csg) {
+ dmnsn_error(DMNSN_SEVERITY_HIGH, "Couldn't allocate difference.");
+ }
+
+ unsigned int i;
+ for (i = 2; i < dmnsn_array_size(objects.children); ++i) {
+ dmnsn_astnode onode;
+ dmnsn_array_get(objects.children, i, &onode);
+
+ dmnsn_object *object = dmnsn_realize_object(onode);
+ csg = dmnsn_new_csg_difference(csg, object);
+ if (!csg) {
+ dmnsn_error(DMNSN_SEVERITY_HIGH, "Couldn't allocate difference.");
+ }
+ }
+
+ dmnsn_astnode modifiers;
+ dmnsn_array_get(astnode.children, 1, &modifiers);
+ dmnsn_realize_object_modifiers(modifiers, csg);
+
+ return csg;
+}
+
+static dmnsn_object *
+dmnsn_realize_merge(dmnsn_astnode astnode)
+{
+ dmnsn_assert(astnode.type == DMNSN_AST_MERGE, "Expected a merge.");
+
+ dmnsn_astnode objects;
+ dmnsn_array_get(astnode.children, 0, &objects);
+
+ dmnsn_astnode o1node, o2node;
+ dmnsn_array_get(objects.children, 0, &o1node);
+ dmnsn_array_get(objects.children, 1, &o2node);
+
+ dmnsn_object *o1 = dmnsn_realize_object(o1node);
+ dmnsn_object *o2 = dmnsn_realize_object(o2node);
+
+ dmnsn_object *csg = dmnsn_new_csg_merge(o1, o2);
+ if (!csg) {
+ dmnsn_error(DMNSN_SEVERITY_HIGH, "Couldn't allocate merge.");
+ }
+
+ unsigned int i;
+ for (i = 2; i < dmnsn_array_size(objects.children); ++i) {
+ dmnsn_astnode onode;
+ dmnsn_array_get(objects.children, i, &onode);
+
+ dmnsn_object *object = dmnsn_realize_object(onode);
+ csg = dmnsn_new_csg_merge(csg, object);
+ if (!csg) {
+ dmnsn_error(DMNSN_SEVERITY_HIGH, "Couldn't allocate merge.");
+ }
+ }
+
+ dmnsn_astnode modifiers;
+ dmnsn_array_get(astnode.children, 1, &modifiers);
+ dmnsn_realize_object_modifiers(modifiers, csg);
+
+ return csg;
+}
+
+static dmnsn_object *
+dmnsn_realize_object(dmnsn_astnode astnode)
+{
+ switch (astnode.type) {
+ case DMNSN_AST_BOX:
+ return dmnsn_realize_box(astnode);
+ case DMNSN_AST_DIFFERENCE:
+ return dmnsn_realize_difference(astnode);
+ case DMNSN_AST_INTERSECTION:
+ return dmnsn_realize_intersection(astnode);
+ case DMNSN_AST_MERGE:
+ return dmnsn_realize_merge(astnode);
+ case DMNSN_AST_SPHERE:
+ return dmnsn_realize_sphere(astnode);
+ case DMNSN_AST_UNION:
+ return dmnsn_realize_union(astnode);
+
+ default:
+ dmnsn_assert(false, "Expected an object.");
+ return NULL; // Shut up compiler
+ }
+}
+
+static dmnsn_light *
+dmnsn_realize_light_source(dmnsn_astnode astnode)
+{
+ dmnsn_assert(astnode.type == DMNSN_AST_LIGHT_SOURCE,
+ "Expected a light source.");
+
+ dmnsn_astnode point, color_node;
+ dmnsn_array_get(astnode.children, 0, &point);
+ dmnsn_array_get(astnode.children, 1, &color_node);
+
+ dmnsn_vector x0 = dmnsn_realize_vector(point);
+ dmnsn_color color = dmnsn_realize_color(color_node);
+
+ dmnsn_light *light = dmnsn_new_point_light(x0, color);
+ if (!light) {
+ dmnsn_error(DMNSN_SEVERITY_HIGH, "Couldn't allocate light.");
+ }
+
+ return light;
+}
+
static dmnsn_scene *
dmnsn_realize_astree(const dmnsn_astree *astree)
{
@@ -801,7 +983,12 @@ dmnsn_realize_astree(const dmnsn_astree *astree)
break;
case DMNSN_AST_BOX:
- object = dmnsn_realize_box(astnode);
+ case DMNSN_AST_DIFFERENCE:
+ case DMNSN_AST_INTERSECTION:
+ case DMNSN_AST_MERGE:
+ case DMNSN_AST_SPHERE:
+ case DMNSN_AST_UNION:
+ object = dmnsn_realize_object(astnode);
dmnsn_array_push(scene->objects, &object);
break;
@@ -810,11 +997,6 @@ dmnsn_realize_astree(const dmnsn_astree *astree)
dmnsn_array_push(scene->lights, &light);
break;
- case DMNSN_AST_SPHERE:
- object = dmnsn_realize_sphere(astnode);
- dmnsn_array_push(scene->objects, &object);
- break;
-
default:
dmnsn_assert(false, "Unrecognised syntax element.");
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-24 12:14:45 +0000