#version 460

layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;

struct DrawCommand {
    uint vertexCount;
    uint instanceCount;
    uint firstVertex;
    uint firstInstance;
};

layout(std430, binding = 0) buffer DrawCommands {
    DrawCommand drawCmds[];
};

layout(std430, binding = 1) buffer Counters {
    uint faceCount;
} counters;

layout(push_constant) uniform ChunkInfo {
    ivec3 chunkPos;
    int slot;
    uint faceOffset;
    uint unused0;
    uint indirectCommandIndex;
    uint padding0;
};

void main() {
    drawCmds[indirectCommandIndex].vertexCount = 0u;
    drawCmds[indirectCommandIndex].instanceCount = 1u;
    drawCmds[indirectCommandIndex].firstVertex = faceOffset * 6u;
    drawCmds[indirectCommandIndex].firstInstance = 0u;

    counters.faceCount = 0u;
}