use of ssbo and texturebuffer in vertex shader

sample.vert

#version 460

#extension GL_GOOGLE_include_directive : require


// ------------------------------------------------------------------------
// INPUTS -----------------------------------------------------------------
// ------------------------------------------------------------------------

layout(location = 0) in vec3 VS_IN_Position;
layout(location = 1) in vec2 VS_IN_Texcoord;
layout(location = 2) in vec3 VS_IN_Normal;
layout(location = 3) in vec3 VS_IN_Tangent;
layout(location = 4) in vec3 VS_IN_Bitangent;

// // ------------------------------------------------------------------------
// // OUTPUTS ----------------------------------------------------------------
// // ------------------------------------------------------------------------

// layout(location = 0) out vec3 FS_IN_FragPos;
// layout(location = 1) out vec2 FS_IN_Texcoord;


out gl_PerVertex
{
    vec4 gl_Position;
};


// ------------------------------------------------------------------------
// PUSH CONSTANTS ---------------------------------------------------------
// ------------------------------------------------------------------------

layout(push_constant) uniform PushConstants
{
    mat4 model;
    mat4 prev_model;
    uint material_idx;
    uint mesh_id;
} ubo;


layout (set = 0, binding = 0) uniform samplerBuffer u_bone_idx;
layout (set = 0, binding = 1) uniform samplerBuffer u_bone_weight;
layout (set = 0, binding = 3, std430) readonly buffer Matrices
{
	mat4 matrices[];
} Skeletons;


void main()
{
	gl_Position = vec4(0.0);
	ivec4 bones   = ivec4(texelFetch(u_bone_idx, gl_VertexIndex).xyzw);
	vec4  weights = texelFetch(u_bone_weight, gl_VertexIndex).xyzw;

	for (int i = 0; i < 4; i++)
	{
		gl_Position += weights[i] * Skeletons.matrices[bones[i]] * vec4(VS_IN_Position, 1.0);
	}
}

//to compile with glslc
//glslc -Os --target-env=vulkan1.2 -o sample.vert.spv -fshader-stage=vertex sample.vert