Techneck/code/source-c/blocks.c

#include "blocks.h"
#include "state.h"

#include <stdlib.h>


tc_block_entry_s * tc_new_block_entry(char *name)
{
    tc_block_entry_s           *entry               = malloc(sizeof(tc_block_entry_s));
    entry->name                     = name;
    entry->attributes_capacity      = 16;
    entry->num_attributes           = 0;
    entry->attributes               = calloc(
        sizeof(tc_block_attribute_s), entry->attributes_capacity
    );
    
    if(tc_game_state_g.block_registry.num_blocks >= tc_game_state_g.block_registry.blocks_capacity)
    {
        tc_game_state_g.block_registry.blocks = 
            realloc(tc_game_state_g.block_registry.blocks,
            sizeof(tc_block_entry_s)
                *
            tc_game_state_g.block_registry.blocks_capacity
        );
    }
    
    tc_game_state_g.block_registry.blocks[tc_game_state_g.block_registry.num_blocks] = entry;
    ++tc_game_state_g.block_registry.num_blocks;
    
    return entry;
}

uint32_t tc_sanitize_block_id(uint32_t id)
{
     return id & 0x00ffffff;
}

void tc_add_attribute_to_block_entry(tc_block_entry_s *entry, tc_block_attribute_s attribute)
{
    if(entry->num_attributes >= entry->attributes_capacity)
    {
        entry->attributes_capacity     *= 2;
        entry->attributes               =
            realloc(entry->attributes, sizeof(tc_block_attribute_s) * entry->attributes_capacity);
    }
    
    entry->attributes[entry->num_attributes]    = attribute;
    ++entry->num_attributes;
}


tc_block_attribute_s * tc_block_resolve_name_to_attribute(tc_block_entry_s *block, char *name)
{
    uint32_t attribute_index = 0;
    while(attribute_index < block->num_attributes)
    {
        if(!strcmp(block->attributes[attribute_index].name, name))
            return &block->attributes[attribute_index];
        
        ++attribute_index;
    }
    return NULL;
}

tc_block_entry_s * tc_get_block(char *name)
{
    uint32_t index = 0;
    while(index < tc_game_state_g.block_registry.num_blocks)
    {
        if(!strcmp(tc_game_state_g.block_registry.blocks[index]->name, name))
            return tc_game_state_g.block_registry.blocks[index];
        
        ++index;
    }
    return NULL;
}

tc_block_entry_s * tc_resolve_id_to_block_entry(uint32_t id)
{
    uint32_t index = 0;
    while(index < tc_game_state_g.block_registry.num_blocks)
    {
        if(tc_sanitize_block_id(tc_game_state_g.block_registry.blocks[index]->identifier) == tc_sanitize_block_id(id))
        {
            return tc_game_state_g.block_registry.blocks[index];
        }
        ++index;
    }
    return NULL;
}

tc_block_registry_s tc_init_blocks()
{
    tc_block_registry_s         registry;
    registry.blocks_capacity        = 256;
    registry.num_blocks             = 0;
    registry.blocks                 = calloc(sizeof(tc_block_entry_s), registry.blocks_capacity);
    
    return registry;
}

tc_block_entry_s * tc_new_cube_block(tc_cube_info_s info)
{
    tc_block_entry_s        *entry      = tc_new_block_entry(info.name);
    entry->identifier                   = info.identifier;
    
    tc_block_attribute_s    block_type_attrib;
    block_type_attrib.name              = "block_type";
    block_type_attrib.value.string      = "basic_cube";
    tc_add_attribute_to_block_entry(entry, block_type_attrib);
    
    tc_block_attribute_s    top_attrib;
    top_attrib.name                     = "top_texture";
    top_attrib.value.pointer            = tc_resolve_id_to_image(info.texture_top);
    tc_add_attribute_to_block_entry(entry, top_attrib);
    
    tc_block_attribute_s    bottom_attrib;
    bottom_attrib.name                  = "bottom_texture";
    bottom_attrib.value.pointer         = tc_resolve_id_to_image(info.texture_bottom);
    tc_add_attribute_to_block_entry(entry, bottom_attrib);
    
    tc_block_attribute_s    east_attrib;
    east_attrib.name                    = "east_texture";
    east_attrib.value.pointer           = tc_resolve_id_to_image(info.texture_east);
    tc_add_attribute_to_block_entry(entry, east_attrib);
    
    tc_block_attribute_s    west_attrib;
    west_attrib.name                    = "west_texture";
    west_attrib.value.pointer           = tc_resolve_id_to_image(info.texture_west);
    tc_add_attribute_to_block_entry(entry, west_attrib);
    
    tc_block_attribute_s    back_attrib;
    back_attrib.name                    = "back_texture";
    back_attrib.value.pointer           = tc_resolve_id_to_image(info.texture_back);
    tc_add_attribute_to_block_entry(entry, back_attrib);
    
    tc_block_attribute_s    front_attrib;
    front_attrib.name                   = "front_texture";
    front_attrib.value.pointer          = tc_resolve_id_to_image(info.texture_front);
    tc_add_attribute_to_block_entry(entry, front_attrib);
    
    tc_premesh_cube(entry);
    
    return entry;
}

tc_cube_info_s tc_gen_unitexture_cube_info
    (char *name, uint32_t identifier, uint32_t texture)
{
    tc_cube_info_s      cube_info;
    cube_info.name              = name;
    cube_info.identifier        = identifier;
    cube_info.texture_top       = texture;
    cube_info.texture_bottom    = texture;
    cube_info.texture_east      = texture;
    cube_info.texture_west      = texture;
    cube_info.texture_back      = texture;
    cube_info.texture_front     = texture;
    
    return cube_info;
}

void tc_create_blocks()
{
    tc_image_s         *dirt_texture    = tc_resolve_name_to_image("dirt");
    tc_image_s         *grass_texture   = tc_resolve_name_to_image("grass");
    tc_image_s         *stone_texture   = tc_resolve_name_to_image("stone");
    
    tc_cube_info_s      dirt            = tc_gen_unitexture_cube_info("Dirt",  1 | TC_BLOCK_OPAQUE_BIT, dirt_texture->image_id);
    tc_cube_info_s      grass           = tc_gen_unitexture_cube_info("Grass", 2 | TC_BLOCK_OPAQUE_BIT, grass_texture->image_id);
    tc_cube_info_s      stone           = tc_gen_unitexture_cube_info("Stone", 3 | TC_BLOCK_OPAQUE_BIT, stone_texture->image_id);
    
    tc_new_cube_block(dirt);
    tc_new_cube_block(grass);
    tc_new_cube_block(stone);
}