ImplicitSurfaceNetwork/blobtree_structure/interface/blobtree.h

#pragma once
#include "primitive_descriptor.h"

// double node in the tree
typedef struct _node_t {
    unsigned int non_null  : 1; // 0 for null pointer, 1 for non-null nodes
    unsigned int primitive : 1; // 0 for internal node, 1 for primitive node
    unsigned int operate   : 2; // 0 for union, 1 for intersection, 2 for difference, 3 for unset
    unsigned int cross     : 2; // 0 for no cross, 1 for cross to parent, 2 for cross left child, 3 for cross right child
    unsigned int
        index : 16; // If primitive node, the index to the primitive information, if cross node, the index to the cross node
    unsigned int main_index  : 8; // use in cross node
    unsigned int placeholder : 2; // unused
} node_t;

typedef struct _primitive_node_t {
    descriptor type;
    void*      desc; // Type conversion when using
} primitive_node_t;

// almost same as node_t, but has parent's and children's pointers to indicate
// the hierarchy, and it is outside of the tree
typedef struct _virtual_node_t {
    unsigned int main_index  : 16;
    unsigned int inner_index : 16;
} virtual_node_t;

// fixed complete binary tree of 16 layers
typedef struct _blobtree_t {
    node_t**          structure;
    int               structure_size;
    primitive_node_t* primitive;
    int               primitive_size;
} blobtree_t;

EXTERN_C_BEGIN

API blobtree_t* create_blobtree();
API void        free_blobtree(blobtree_t* blobtree);

API virtual_node_t blobtree_new_virtual_node_constant(const constant_descriptor_t* desc, blobtree_t* blobtree);
API virtual_node_t blobtree_new_virtual_node_plane(const plane_descriptor_t* desc, blobtree_t* blobtree);
API virtual_node_t blobtree_new_virtual_node_sphere(const sphere_descriptor_t* desc, blobtree_t* blobtree);
API virtual_node_t blobtree_new_virtual_node_cylinder(const cylinder_descriptor_t* desc, blobtree_t* blobtree);
API virtual_node_t blobtree_new_virtual_node_cone(const cone_descriptor_t* desc, blobtree_t* blobtree);
API virtual_node_t blobtree_new_virtual_node_box(const box_descriptor_t* desc, blobtree_t* blobtree);
API virtual_node_t blobtree_new_virtual_node_mesh(const mesh_descriptor_t* desc, blobtree_t* blobtree);
API virtual_node_t blobtree_new_virtual_node_extrude(const extrude_descriptor_t* desc, blobtree_t* blobtree);
API void           blobtree_free_virtual_node(virtual_node_t* node);

API bool virtual_node_set_parent(virtual_node_t* node, virtual_node_t* parent, blobtree_t* blobtree);
API bool virtual_node_set_left_child(virtual_node_t* node, virtual_node_t* child, blobtree_t* blobtree);
API bool virtual_node_set_right_child(virtual_node_t* node, virtual_node_t* child, blobtree_t* blobtree);
API bool virtual_node_add_child(virtual_node_t* node, virtual_node_t* child, blobtree_t* blobtree);
API bool virtual_node_remove_child(virtual_node_t* node, virtual_node_t* child, blobtree_t* blobtree);

API bool virtual_node_replace_primitive_constant(virtual_node_t* node, const constant_descriptor_t* desc, blobtree_t* blobtree);
API bool virtual_node_replace_primitive_plane(virtual_node_t* node, const plane_descriptor_t* desc, blobtree_t* blobtree);
API bool virtual_node_replace_primitive_sphere(virtual_node_t* node, const sphere_descriptor_t* desc, blobtree_t* blobtree);
API bool virtual_node_replace_primitive_cylinder(virtual_node_t* node, const cylinder_descriptor_t* desc, blobtree_t* blobtree);
API bool virtual_node_replace_primitive_cone(virtual_node_t* node, const cone_descriptor_t* desc, blobtree_t* blobtree);
API bool virtual_node_replace_primitive_box(virtual_node_t* node, const box_descriptor_t* desc, blobtree_t* blobtree);
API bool virtual_node_replace_primitive_mesh(virtual_node_t* node, const mesh_descriptor_t* desc, blobtree_t* blobtree);
API bool virtual_node_replace_primitive_extrude(virtual_node_t* node, const extrude_descriptor_t* desc, blobtree_t* blobtree);

EXTERN_C_END