Basic metal shader

//
//  Shaders.metal
//  engine
//
//  Created by Vilem Otte on 09.05.2022.
//

#include <metal_stdlib>
using namespace metal;

struct VertexIn {
    float3 position;
    float4 color;
};

struct VertexOut {
    float4 position [[ position ]];
    float4 color;
};

vertex VertexOut basic_vertex_function(const device VertexIn* vertices [[ buffer(0) ]],
                                       uint vertexID [[ vertex_id ]]) {
    VertexOut out;
    out.position = float4(vertices[vertexID].position, 1.0);
    out.color = vertices[vertexID].color;
    return out;
}

fragment float4 basic_fragment_function(VertexOut in [[ stage_in ]]) {
    return in.color;
}