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refactor: transparent render (#14)

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* fix(renderer): defer uniform location retrieval and add view matrix in outline rendering

* refactor(gameplay): encapsulate per-type vertex data into VertexData struct

* feat(rendering): separate transparent blocks into discard and blend modes

* feat(renderer): implement order-independent transparency

* fix(shaders): reduce alpha discard threshold to 0.8
This commit is contained in:
zhenyan121
2026-06-11 12:21:19 +08:00
committed by GitHub
parent 2906106597
commit d0bc8d627f
29 changed files with 572 additions and 284 deletions
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194
src/gameplay/chunk.cpp
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@@ -9,65 +9,36 @@
namespace Cubed {
Chunk::Chunk(World& world, ChunkPos chunk_pos)
: m_chunk_pos(chunk_pos), m_world(world) {}
Chunk::~Chunk() {
if (m_normal_vbo != 0) {
m_world.push_delete_vbo(m_normal_vbo);
}
if (m_cross_plane_vbo != 0) {
m_world.push_delete_vbo(m_cross_plane_vbo);
}
if (m_transparent_normal_vbo != 0) {
m_world.push_delete_vbo(m_transparent_normal_vbo);
: m_chunk_pos(chunk_pos), m_world(world) {
for (int i = 0; i < VERTEX_DATA_SUM; i++) {
m_vertex_data.emplace_back(m_world);
}
}
Chunk::~Chunk() {}
Chunk::Chunk(Chunk&& other) noexcept
: m_dirty(other.is_dirty()), m_need_upload(other.m_need_upload.load()),
m_is_on_gen_vertex_data(other.m_is_on_gen_vertex_data.load()),
m_normal_vertices_sum(other.m_normal_vertices_sum.load()),
m_cross_vertices_sum(other.m_cross_vertices_sum.load()),
m_transparent_vertices_sum(other.m_transparent_vertices_sum.load()),
m_biome(other.m_biome.load()), m_chunk_pos(std::move(other.m_chunk_pos)),
m_world(other.m_world), m_heightmap(std::move(other.m_heightmap)),
m_blocks(std::move(other.m_blocks)), m_normal_vbo(other.m_normal_vbo),
m_cross_plane_vbo(other.m_cross_plane_vbo),
m_transparent_normal_vbo(other.m_transparent_normal_vbo),
m_normal_vertices(std::move(other.m_normal_vertices)),
m_cross_plane_vertices(std::move(other.m_cross_plane_vertices)),
m_transparent_normal_vertices(
std::move(other.m_transparent_normal_vertices)),
m_seed(other.m_seed), m_conditions(other.m_conditions) {
other.m_normal_vbo = 0;
other.m_cross_plane_vbo = 0;
other.m_transparent_normal_vbo = 0;
}
m_blocks(std::move(other.m_blocks)),
m_vertex_data(std::move(other.m_vertex_data)), m_seed(other.m_seed),
m_conditions(other.m_conditions) {}
Chunk& Chunk::operator=(Chunk&& other) noexcept {
// Logger::info("other Chunk pos {} {} in Chunk& Chunk::operator=(Chunk&&
// other) this {}", other.m_chunk_pos.x, other.m_chunk_pos.z,
// static_cast<const void*>(&other));
m_normal_vbo = other.m_normal_vbo;
other.m_normal_vbo = 0;
m_cross_plane_vbo = other.m_cross_plane_vbo;
m_transparent_normal_vbo = other.m_transparent_normal_vbo;
other.m_transparent_normal_vbo = 0;
other.m_cross_plane_vbo = 0;
m_chunk_pos = std::move(other.m_chunk_pos);
m_heightmap = std::move(other.m_heightmap);
m_blocks = std::move(other.m_blocks);
m_dirty = other.is_dirty();
m_normal_vertices = std::move(other.m_normal_vertices);
m_cross_plane_vertices = std::move(other.m_cross_plane_vertices);
m_transparent_normal_vertices =
std::move(other.m_transparent_normal_vertices);
m_vertex_data = std::move(other.m_vertex_data);
m_biome = other.m_biome.load();
m_is_on_gen_vertex_data = other.m_is_on_gen_vertex_data.load();
m_need_upload = other.m_need_upload.load();
m_normal_vertices_sum = other.m_normal_vertices_sum.load();
m_cross_vertices_sum = other.m_cross_vertices_sum.load();
m_transparent_vertices_sum = other.m_transparent_vertices_sum.load();
m_seed = other.m_seed;
m_conditions = other.m_conditions;
return *this;
@@ -139,29 +110,41 @@ void Chunk::gen_vertex_data(
}
m_is_on_gen_vertex_data = true;
std::lock_guard lk(m_vertexs_data_mutex);
gen_normal_vertices(neighbor_block);
gen_cross_plane_vertices();
for (auto& data : m_vertex_data) {
data.m_vertices.clear();
}
gen_vertices(neighbor_block);
for (auto& data : m_vertex_data) {
data.update_sum();
}
m_need_upload = true;
m_is_on_gen_vertex_data = false;
}
GLuint Chunk::get_normal_vbo() const { return m_normal_vbo; }
GLuint Chunk::get_normal_vbo() const { return m_vertex_data[0].m_vbo; }
size_t Chunk::get_normal_vertices_sum() const {
if (m_normal_vertices_sum == 0) {
if (m_vertex_data[0].m_sum == 0) {
Logger::warn("m_normal_vertices_sum is 0");
}
return m_normal_vertices_sum.load();
return m_vertex_data[0].m_sum.load();
}
GLuint Chunk::get_cross_vbo() const { return m_cross_plane_vbo; }
GLuint Chunk::get_cross_vbo() const { return m_vertex_data[1].m_vbo; }
size_t Chunk::get_cross_vertices_sum() const {
return m_cross_vertices_sum.load();
return m_vertex_data[1].m_sum.load();
}
GLuint Chunk::get_transparent_vbo() const { return m_transparent_normal_vbo; }
size_t Chunk::get_transparent_vertices_sum() const {
return m_transparent_vertices_sum.load();
GLuint Chunk::get_normal_discard_vbo() const { return m_vertex_data[2].m_vbo; }
size_t Chunk::get_normal_discard_vertices_sum() const {
return m_vertex_data[2].m_sum.load();
}
GLuint Chunk::get_normal_blend_vbo() const { return m_vertex_data[3].m_vbo; }
size_t Chunk::get_normal_blend_vertices_sum() const {
return m_vertex_data[3].m_sum.load();
}
void Chunk::gen_phase_one() {
@@ -235,33 +218,12 @@ void Chunk::upload_to_gpu() {
ASSERT(is_need_upload());
if (m_normal_vbo == 0) {
glGenBuffers(1, &m_normal_vbo);
std::lock_guard lk(m_vertexs_data_mutex);
for (auto& data : m_vertex_data) {
data.upload();
}
std::lock_guard lk(m_vertexs_data_mutex);
glBindBuffer(GL_ARRAY_BUFFER, m_normal_vbo);
glBufferData(GL_ARRAY_BUFFER, m_normal_vertices.size() * sizeof(Vertex),
m_normal_vertices.data(), GL_DYNAMIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
if (m_cross_plane_vertices.size() != 0) {
if (m_cross_plane_vbo == 0) {
glGenBuffers(1, &m_cross_plane_vbo);
}
glBindBuffer(GL_ARRAY_BUFFER, m_cross_plane_vbo);
glBufferData(GL_ARRAY_BUFFER,
m_cross_plane_vertices.size() * sizeof(Vertex),
m_cross_plane_vertices.data(), GL_DYNAMIC_DRAW);
}
if (m_transparent_normal_vertices.size() != 0) {
if (m_transparent_normal_vbo == 0) {
glGenBuffers(1, &m_transparent_normal_vbo);
}
glBindBuffer(GL_ARRAY_BUFFER, m_transparent_normal_vbo);
glBufferData(GL_ARRAY_BUFFER,
m_transparent_normal_vertices.size() * sizeof(Vertex),
m_transparent_normal_vertices.data(), GL_DYNAMIC_DRAW);
}
// after fininshed it, can use
clear_dirty();
m_need_upload = false;
@@ -300,10 +262,8 @@ unsigned Chunk::seed() const {
BiomeConditions& Chunk::conditions() { return m_conditions; }
void Chunk::gen_normal_vertices(
void Chunk::gen_vertices(
const std::array<const std::vector<BlockType>*, 4>& neighbor_block) {
m_normal_vertices.clear();
m_transparent_normal_vertices.clear();
static const glm::ivec3 DIR[6] = {{0, 0, 1}, {1, 0, 0}, {0, 0, -1},
{-1, 0, 0}, {0, 1, 0}, {0, -1, 0}};
@@ -399,6 +359,10 @@ void Chunk::gen_normal_vertices(
if (neighbor_culled) {
continue;
}
if (BlockManager::is_cross_plane(cur_id)) {
gen_cross_plane_vertices(world_x, world_y, world_z,
cur_id);
}
for (int i = 0; i < 6; i++) {
Vertex vex = {
VERTICES_POS[face][i][0] + (float)world_x * 1.0f,
@@ -410,55 +374,57 @@ void Chunk::gen_normal_vertices(
};
if (BlockManager::is_transparent(cur_id)) {
m_transparent_normal_vertices.emplace_back(vex);
if (BlockManager::is_discard(cur_id) &&
BlockManager::is_blend(cur_id)) {
Logger::warn(
"Block id {} is both discard and blend is "
"must only one can true !!!",
cur_id);
}
if (BlockManager::is_discard(cur_id)) {
m_vertex_data[2].m_vertices.emplace_back(vex);
} else if (BlockManager::is_blend(cur_id)) {
m_vertex_data[3].m_vertices.emplace_back(vex);
} else {
Logger::warn("Id {} is transparent but not "
"discard or blend",
cur_id);
m_vertex_data[3].m_vertices.emplace_back(vex);
}
} else {
m_normal_vertices.emplace_back(vex);
m_vertex_data[0].m_vertices.emplace_back(vex);
}
}
}
}
}
}
m_normal_vertices_sum = m_normal_vertices.size();
m_transparent_vertices_sum = m_transparent_normal_vertices.size();
}
void Chunk::gen_cross_plane_vertices() {
void Chunk::gen_cross_plane_vertices(int world_x, int world_y, int world_z,
BlockType id) {
m_cross_plane_vertices.clear();
if (!BlockManager::is_cross_plane(id)) {
Logger::warn("Block {} {} {} id {} is not cross plane", world_x,
world_y, world_z, id);
return;
}
for (int face = 0; face < 2; face++) {
for (int i = 0; i < 6; i++) {
Vertex vex = {
CROSS_VERTICES_POS[face][i][0] + (float)world_x * 1.0f,
CROSS_VERTICES_POS[face][i][1] + (float)world_y * 1.0f,
CROSS_VERTICES_POS[face][i][2] + (float)world_z * 1.0f,
CROSS_TEX_COORDS[face][i][0],
CROSS_TEX_COORDS[face][i][1],
static_cast<float>(BlockManager::cross_plane_index(id))
for (int x = 0; x < SIZE_X; x++) {
for (int y = 0; y < SIZE_Y; y++) {
for (int z = 0; z < SIZE_Z; z++) {
int world_x = x + m_chunk_pos.x * CHUNK_SIZE;
int world_z = z + m_chunk_pos.z * CHUNK_SIZE;
int world_y = y;
int id = m_blocks[index(x, y, z)];
if (!BlockManager::is_cross_plane(id)) {
continue;
}
for (int face = 0; face < 2; face++) {
for (int i = 0; i < 6; i++) {
Vertex vex = {CROSS_VERTICES_POS[face][i][0] +
(float)world_x * 1.0f,
CROSS_VERTICES_POS[face][i][1] +
(float)world_y * 1.0f,
CROSS_VERTICES_POS[face][i][2] +
(float)world_z * 1.0f,
CROSS_TEX_COORDS[face][i][0],
CROSS_TEX_COORDS[face][i][1],
static_cast<float>(
BlockManager::cross_plane_index(id))
};
m_cross_plane_vertices.emplace_back(vex);
}
}
}
};
m_vertex_data[1].m_vertices.emplace_back(vex);
}
}
m_cross_vertices_sum = m_cross_plane_vertices.size();
// Logger::info("Cross Sum {}", m_cross_vertices_sum.load());
}
// Logger::info("Cross Sum {}", m_cross_vertices_sum.load());
} // namespace Cubed