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Zepha/src/lua/register/RegisterBlock.h

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#pragma once
#include "lua/Lua.h"
#include "game/def/ItemDef.h"
#include "game/LocalSubgame.h"
#include "game/def/BiomeDef.h"
#include "game/def/BlockDef.h"
#include "game/ServerSubgame.h"
#include "game/def/CraftItemDef.h"
#include "game/def/mesh/BlockModel.h"
#include "game/def/mesh/SelectionBox.h"
#include "game/atlas/asset/AtlasTexture.h"
#include "game/atlas/LocalDefinitionAtlas.h"
#include "game/atlas/ServerDefinitionAtlas.h"
namespace RegisterBlock {
namespace {
/**
* Takes a lua selection box table list, and returns a vector of selection boxes.
*
* @param boxesTable - The lua box table list.
* @returns a vector of selection boxes.
*/
static vec<SelectionBox> parseBoxes(sol::table boxesTable) {
vec<SelectionBox> boxes{};
for (auto pair : boxesTable) {
if (!pair.second.is<sol::table>()) throw std::runtime_error("must be a table");
sol::table table = pair.second;
if (table.size() != 6) throw std::runtime_error("must contain exactly 6 elements");
boxes.emplace_back(vec3 { table[1], table[2], table[3] }, vec3 { table[4], table[5], table[6] });
}
return boxes;
}
/**
* Creates near and far models for a block based on the passed in parameters.
*
* @param blockTable - The lua block table to find the model parameters from.
* @param blockModels - The lua block models table with the available block model definitions.
* @param atlas - The texture atlas, can be nullptr on the server to disable linking textures.
*
* @returns two block models in a pair, the first being the near model and the second being the far model.
*/
static std::pair<BlockModel, BlockModel>
createBlockModel(sol::table blockTable, sol::table blockModels, TextureAtlas* atlas) {
// Get the specified block model
let modelStr = blockTable.get_or<string>("model", "zepha:base:block");
let modelOpt = blockModels.get<optional<sol::table>>(modelStr);
if (!modelOpt) throw std::runtime_error("Non-existent model \"" + modelStr + "\" specified");
sol::table modelTable = *modelOpt;
BlockModel model;
// Apply basic properties
model.culls = blockTable.get_or("culls", true);
model.visible = blockTable.get_or("visible", true);
// Convert textures and low-def textures into vectors
let texturesOpt = blockTable.get<sol::optional<sol::table>>("textures");
let ldTexturesOpt = blockTable.get<sol::optional<sol::table>>("lowdef_textures");
if (!texturesOpt) throw std::runtime_error("Missing textures property");
vec<string> textures;
for (let& pair : *texturesOpt) {
if (!pair.second.is<string>()) throw std::runtime_error(
"textures table contains non-string value");
textures.push_back(pair.second.as<string>());
}
if (textures.empty()) textures.push_back("_missing");
vec<string> lowdef_textures;
if (!ldTexturesOpt) lowdef_textures = textures;
else {
for (let& pair : *ldTexturesOpt) {
if (!pair.second.is<string>()) throw std::runtime_error(
"lowdef_textures table has non-string value!");
lowdef_textures.push_back(pair.second.as<string>());
}
}
if (lowdef_textures.empty()) lowdef_textures.push_back("_missing");
// Parse through mesh mods and add them
optional<sol::table> meshModTable = modelTable.get<optional<sol::table>>("mesh_mods");
if (meshModTable) {
for (auto& modEntry : *meshModTable) {
auto modTable = modEntry.second.as<sol::table>();
string meshMod = modTable.get_or<string>("type", "none");
if (meshMod == "none") continue;
else if (meshMod == "offset_x")
model.meshMods.emplace_back(MeshMod::OFFSET_X, modTable.get_or<f32>("amplitude", 1));
else if (meshMod == "offset_y")
model.meshMods.emplace_back(MeshMod::OFFSET_Y, modTable.get_or<f32>("amplitude", 1));
else if (meshMod == "offset_z")
model.meshMods.emplace_back(MeshMod::OFFSET_Z, modTable.get_or<f32>("amplitude", 1));
else if (meshMod == "rotate_x")
model.meshMods.emplace_back(MeshMod::ROTATE_X, modTable.get_or<f32>("amplitude", 1));
else if (meshMod == "rotate_y")
model.meshMods.emplace_back(MeshMod::ROTATE_Y, modTable.get_or<f32>("amplitude", 1));
else if (meshMod == "rotate_z")
model.meshMods.emplace_back(MeshMod::ROTATE_Z, modTable.get_or<f32>("amplitude", 1));
}
}
// Parse through all the parts and add them to the model
let partsOpt = modelTable.get<optional<sol::table>>("parts");
if (!partsOpt) throw std::runtime_error("blockmodel is missing parts table");
partsOpt->for_each([&](sol::object key, sol::object value) {
// Validate that variables are what we expect them to be
if (!value.is<sol::table>()) throw std::runtime_error("meshpart must be a table");
sol::table meshPartTable = value.as<sol::table>();
let points_optional = meshPartTable.get<sol::optional<sol::table>>("points");
if (!points_optional) throw std::runtime_error("Meshpart is missing a points table");
sol::table points = *points_optional;
if (points.size() % 20 != 0)
throw std::runtime_error("Points table must contain a multiple of 20 values");
// Populate the Vertices and Indices vectors from the points table
vec<BlockModelVertex> vertices;
vec<u32> indices;
for (u32 i = 1; i <= points.size() / 5; i++) {
u32 offset = (i - 1) * 5 + 1;
vec3 pos(points[offset], points[offset + 1], points[offset + 2]);
vec2 tex(points[offset + 3], points[offset + 4]);
vertices.push_back(BlockModelVertex { pos, {}, tex, tex, {}, {} });
}
u32 ind = 0;
for (u32 i = 1; i <= points.size() / 20; i++) {
indices.push_back(ind);
indices.push_back(ind + 1);
indices.push_back(ind + 2);
indices.push_back(ind + 2);
indices.push_back(ind + 3);
indices.push_back(ind);
ind += 4;
}
// Get texture, and add texture refs to blockModel if the atlas is provided
u32 tex = std::max(meshPartTable.get_or<u32>("tex", 1), 1u);
optional<u32> tintInd {};
optional<AtlasTexture> textureRef {};
optional<AtlasTexture> tintTextureRef = {};
if (atlas) {
textureRef = (*atlas)[textures[std::min(tex - 1, static_cast<u32>(textures.size()) - 1)]];
model.textures.push_back(*textureRef);
tintInd = textureRef->getTintInd();
tintTextureRef = textureRef->getTintMask();
}
// Create the meshpart object
MeshPart meshPart(std::move(vertices), std::move(indices), textureRef, tintInd, tintTextureRef);
// Add the shader mod, if it exists
sol::optional<sol::table> shaderModTable = meshPartTable.get<sol::optional<sol::table>>("shader_mod");
if (shaderModTable) {
std::string shaderMod = shaderModTable->get_or<std::string>("type", "none");
if (shaderMod == "none") meshPart.shaderMod = ShaderMod::NONE;
else if (shaderMod == "rotate_x") {
meshPart.shaderMod = ShaderMod::ROTATE_X;
meshPart.modValue = (*shaderModTable).get_or<float>("speed", 1);
}
else if (shaderMod == "rotate_y") {
meshPart.shaderMod = ShaderMod::ROTATE_Y;
meshPart.modValue = (*shaderModTable).get_or<float>("speed", 1);
}
else if (shaderMod == "rotate_z") {
meshPart.shaderMod = ShaderMod::ROTATE_Z;
meshPart.modValue = (*shaderModTable).get_or<float>("speed", 1);
}
else if (shaderMod == "sway_attached") {
meshPart.shaderMod = ShaderMod::SWAY_ATTACHED;
meshPart.modValue = (*shaderModTable).get_or<float>("amplitude", 1);
}
else if (shaderMod == "sway_full_block") {
meshPart.shaderMod = ShaderMod::SWAY_FULL_BLOCK;
meshPart.modValue = (*shaderModTable).get_or<float>("amplitude", 1);
}
}
//Add the meshpart to the proper face of the model
std::string face = meshPartTable.get_or<std::string>("face", "nocull");
EVec d =
face == "top" ? EVec::TOP :
face == "bottom" ? EVec::BOTTOM :
face == "left" ? EVec::LEFT :
face == "right" ? EVec::RIGHT :
face == "front" ? EVec::FRONT :
face == "back" ? EVec::BACK :
face == "nocull" ? EVec::NO_CULL :
EVec::INVALID;
if (d == EVec::INVALID) throw std::runtime_error("face value is unrecognized");
model.parts[static_cast<int>(d)].push_back(meshPart);
});
// Create the far model
BlockModel farModel {};
auto ldRender = blockTable.get_or("lowdef_render", true);
if (atlas) {
vec<std::tuple<AtlasTexture, optional<u32>, optional<AtlasTexture>>> modelData;
for (let i = 0; i < lowdef_textures.size(); i++) {
let textureRef = (*atlas)[lowdef_textures[i]];
modelData.emplace_back(textureRef, textureRef.getTintInd(), textureRef.getTintMask());
}
farModel = BlockModel { modelData };
}
farModel.culls = ldRender;
farModel.visible = ldRender;
return { model, farModel };
}
/**
* Attempts to add a callback of the type specified from the block table provided
* to the block definition provided. Does nothing if the block table doesn't have a callback of said type.
*
* @param blockDef - The block definition to add the callback to.
* @param blockTable - The lua block table to get the callback from.
* @param name - The name of the callback to look for in the lua table.
* @param cbType - The type to register the callback as.
*/
static void
addCallback(BlockDef& blockDef, sol::table& blockTable, const std::string& name, BlockDef::Callback cbType) {
auto cb = blockTable.get<sol::optional<sol::protected_function>>(name);
if (cb) blockDef.callbacks.insert({ cbType, *cb });
}
/**
* Registers a block from the blocks table to the Definition Atlas.
* Generic method that works on both the client and the server, depending on if `atlas` is non-null.
*
* @param blocks - The blocks table to index.
* @param blockModels - The blockmodels table for indexing block models.
* @param identifier - The identifier of the block to register.
* @param defs - The Definition Atlas to add the block to.
* @param atlas - The Texture Atlas, pass in if running on the client, otherwise pass nullptr.
*/
static void registerBlock(sol::table blocks, sol::table blockModels,
const std::string& identifier, DefinitionAtlas& defs, TextureAtlas* atlas) {
sol::table blockTable = blocks[identifier];
// Basic Block Properties
auto nameOpt = blockTable.get<sol::optional<std::string>>("name");
if (!nameOpt) throw std::runtime_error(identifier + " is missing name property!");
bool culls = blockTable.get_or("culls", true);
bool solid = blockTable.get_or("solid", true);
bool lightPropagates = blockTable.get_or("light_propagates", false);
auto maxStack = blockTable.get_or("stack", 64);
unsigned int health = INT32_MAX, defense = 0;
auto toolOpt = blockTable.get<sol::optional<sol::table>>("tool_props");
if (toolOpt) {
health = toolOpt->get_or<unsigned int>("health", INT32_MAX);
defense = toolOpt->get_or<unsigned int>("defense", 0);
}
glm::vec3 lightSource{};
if (blockTable.get<sol::optional<sol::table>>("light_source")) {
auto light = blockTable.get<sol::table>("light_source");
lightSource = { light[1], light[2], light[3] };
}
else if (blockTable.get_or<float>("light_source", -1) != -1) {
auto light = blockTable.get<float>("light_source");
lightSource = { light, light, light };
}
// Parse through selection boxes and collision boxes
auto selectionOpt = blockTable.get<sol::optional<sol::table>>("selection_box");
auto collisionOpt = blockTable.get<sol::optional<sol::table>>("collision_box");
std::vector<SelectionBox> selectionBoxes{};
try {
if (selectionOpt) selectionBoxes = parseBoxes(*selectionOpt);
else selectionBoxes.emplace_back(glm::vec3{ 0, 0, 0 }, glm::vec3{ 1, 1, 1 });
}
catch (const char* error) {
throw std::string("selection boxes " + std::string(error)).c_str();
}
std::vector<SelectionBox> collisionBoxes{};
try { if (collisionOpt) collisionBoxes = parseBoxes(*collisionOpt); }
catch (const char* error) { throw std::string("collision boxes " + std::string(error)).c_str(); }
if (collisionBoxes.size() == 0) collisionBoxes.emplace_back(glm::vec3{ 0, 0, 0 }, glm::vec3{ 1, 1, 1 });
// Create the block model
std::pair<BlockModel, BlockModel> models = createBlockModel(blockTable, blockModels, atlas);
BlockDef* def = new BlockDef();
def->identifier = identifier;
def->name = *nameOpt;
def->index = defs.size();
def->culls = culls;
def->solid = solid;
def->lightSource = lightSource;
def->lightPropagates = lightPropagates;
def->health = health;
def->defense = defense;
def->maxStack = maxStack;
def->model = models.first;
def->farModel = models.second;
def->sBoxes = std::move(selectionBoxes);
def->cBoxes = std::move(collisionBoxes);
// Create entity model
if (atlas) def->createModel();
// Bind Callbacks
addCallback(*def, blockTable, "on_construct", BlockDef::Callback::CONSTRUCT);
addCallback(*def, blockTable, "after_construct", BlockDef::Callback::AFTER_CONSTRUCT);
addCallback(*def, blockTable, "on_destruct", BlockDef::Callback::DESTRUCT);
addCallback(*def, blockTable, "after_destruct", BlockDef::Callback::AFTER_DESTRUCT);
addCallback(*def, blockTable, "on_place", BlockDef::Callback::PLACE);
addCallback(*def, blockTable, "on_place_client", BlockDef::Callback::PLACE_CLIENT);
addCallback(*def, blockTable, "after_place", BlockDef::Callback::AFTER_PLACE);
addCallback(*def, blockTable, "after_place_client", BlockDef::Callback::AFTER_PLACE_CLIENT);
addCallback(*def, blockTable, "on_break", BlockDef::Callback::BREAK);
addCallback(*def, blockTable, "on_break_client", BlockDef::Callback::BREAK_CLIENT);
addCallback(*def, blockTable, "after_break", BlockDef::Callback::AFTER_BREAK);
addCallback(*def, blockTable, "after_break_client", BlockDef::Callback::AFTER_BREAK_CLIENT);
addCallback(*def, blockTable, "on_interact", BlockDef::Callback::INTERACT);
addCallback(*def, blockTable, "on_interact_client", BlockDef::Callback::INTERACT_CLIENT);
// Add Block Definition to the Atlas
defs.registerDef(def);
}
}
/**
* Server method to register a block. Calls registerBlock with the necessary parameters.
* Registers a block to the DefinitionAtlas.
*
* @param core - The core table to index for 'registered_blocks', i.e. `_G['zepha']`.
* @param game - The server subgame instance.
* @param identifier - The identifier of the block to register.
*/
static void server(sol::table& core, ServerSubgame& game, const string& identifier) {
registerBlock(core["registered_blocks"], core["registered_blockmodels"],
identifier, game.getDefs(), nullptr);
}
/**
* Client method to register a block. Calls registerBlock with the necessary parameters.
* Registers a block to the DefinitionAtlas.
*
* @param core - The core table to index for 'registered_blocks', i.e. `_G['zepha']`.
* @param game - The client subgame instance.
* @param identifier - The identifier of the block to register.
*/
static void client(sol::table& core, LocalSubgame& game, const string& identifier) {
registerBlock(core["registered_blocks"], core["registered_blockmodels"],
identifier, game.getDefs(), &game.textures);
}
}
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