Pros of Craft

• Written in C, potentially offering better performance
• More mature project with a larger community and more contributions
• Includes multiplayer functionality out of the box

Cons of Craft

• Less faithful to original Minecraft aesthetics and mechanics
• More complex codebase, potentially harder for beginners to understand
• Lacks some advanced features present in Minecraft-Weekend

Code Comparison

Craft (terrain generation):

for (int x = 0; x < size; x++) {
    for (int z = 0; z < size; z++) {
        float f = simplex2(x * 0.01, z * 0.01, 4, 0.5, 2);
        int h = (f + 1) / 2 * 32 + 16;
        for (int y = 0; y < h; y++) {
            set_block(x, y, z, 1);
        }
    }
}

Minecraft-Weekend (terrain generation):

for (int x = 0; x < CHUNK_SIZE; x++) {
    for (int z = 0; z < CHUNK_SIZE; z++) {
        float height = noise2d(x + chunk->x * CHUNK_SIZE, z + chunk->z * CHUNK_SIZE);
        int y = (int)(height * CHUNK_SIZE);
        for (int i = 0; i < y; i++) {
            chunk_set_block(chunk, x, i, z, BLOCK_GRASS);
        }
    }
}

Both projects use similar approaches for terrain generation, utilizing noise functions to create natural-looking landscapes. However, Minecraft-Weekend's implementation appears more closely aligned with Minecraft's chunk-based system.

Pros of PortableGL

• More focused on providing a portable graphics library, making it potentially more versatile for different projects
• Simpler codebase, easier to understand and modify for specific needs
• Lighter weight, with fewer dependencies and a smaller overall footprint

Cons of PortableGL

• Less feature-rich compared to Minecraft-weekend's game-specific implementation
• May require more work to implement complex 3D rendering and game mechanics
• Lacks the specific Minecraft-like voxel rendering optimizations

Code Comparison

PortableGL:

void gl_draw_triangle(GLContext *c, GLVertex *v0, GLVertex *v1, GLVertex *v2)
{
    // Triangle drawing implementation
}

Minecraft-weekend:

void chunk_render(Chunk *chunk, Camera *camera)
{
    // Chunk rendering implementation
}

The code snippets show the difference in focus between the two projects. PortableGL provides low-level graphics primitives, while Minecraft-weekend implements game-specific rendering functions.

Pros of MineCraft-One-Week-Challenge

• Uses C++ and SFML, which may be more familiar to some developers
• Includes a basic GUI system for menus and HUD elements
• Implements more advanced features like biomes and structures

Cons of MineCraft-One-Week-Challenge

• Less optimized rendering and chunk loading compared to minecraft-weekend
• Lacks some of the polish and refinement found in minecraft-weekend
• Does not include multiplayer functionality

Code Comparison

MineCraft-One-Week-Challenge (C++):

void Chunk::makeMesh()
{
    m_mesh.reset(new Mesh);
    for (int y = 0; y < CHUNK_SIZE; ++y)
        for (int x = 0; x < CHUNK_SIZE; ++x)
            for (int z = 0; z < CHUNK_SIZE; ++z)
                addBlockToMesh(x, y, z);
}

minecraft-weekend (C):

void chunk_render(chunk_t *chunk) {
    for (int y = 0; y < CHUNK_H; y++) {
        for (int x = 0; x < CHUNK_W; x++) {
            for (int z = 0; z < CHUNK_D; z++) {
                block_render(chunk, x, y, z);
            }
        }
    }
}

Both projects use similar approaches for chunk rendering, iterating through blocks and adding them to the mesh. However, minecraft-weekend's implementation is in C, while MineCraft-One-Week-Challenge uses C++ with object-oriented principles.

Pros of Minetest

• More mature and feature-rich project with a larger community
• Modular architecture allowing for extensive modding and customization
• Cross-platform support (Windows, macOS, Linux, Android, FreeBSD)

Cons of Minetest

• Less faithful recreation of Minecraft's original aesthetics and mechanics
• Steeper learning curve for new players due to its modular nature
• Potentially overwhelming number of mods and options for casual players

Code Comparison

Minecraft-weekend (C):

void world_set_block(World* self, ivec3s pos, Block block) {
    if (!WORLD_CONTAINS(pos)) {
        return;
    }
    self->blocks[pos.x][pos.y][pos.z] = block;
    world_set_dirty(self, pos);
}

Minetest (C++):

void Map::setNode(v3s16 p, const MapNode &n)
{
    MapBlock *block = getBlockNoCreateNoEx(p);
    if (block == NULL)
        return;
    block->setNode(p, n);
}

Both projects use similar approaches for setting blocks/nodes in the world, with Minetest's implementation being more object-oriented due to its use of C++.

Pros of LearnOpenGL

• Comprehensive OpenGL tutorial series covering a wide range of topics
• Well-structured learning path for beginners to advanced users
• Extensive documentation and explanations for each concept

Cons of LearnOpenGL

• Focuses solely on OpenGL, lacking game-specific implementations
• May require additional resources for game development concepts
• Less hands-on experience with a complete game project

Code Comparison

LearnOpenGL:

glBindVertexArray(VAO);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);
glEnableVertexAttribArray(0);

minecraft-weekend:

glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
glGenBuffers(1, &vbo);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);

Summary

LearnOpenGL provides a comprehensive OpenGL learning experience with detailed explanations and a structured approach. However, it lacks game-specific implementations and hands-on experience with a complete game project. minecraft-weekend offers a more focused approach to building a Minecraft-like game, providing practical experience in game development using OpenGL. The code comparison shows similarities in OpenGL usage, with minor differences in syntax and organization.