bgfx/tools/geometryv/vs_mesh.sc

$input a_position, a_normal
$output v_normal

/*
 * Copyright 2019-2019 Attila Kocsis. All rights reserved.
 * License: https://github.com/bkaradzic/bgfx/blob/master/LICENSE
 */

#include <bgfx_shader.sh>

void main()
{
	gl_Position = mul(u_modelViewProj, vec4(a_position, 1.0) );

	vec3 normal = a_normal.xyz*2.0 - 1.0;
	v_normal = mul(u_model[0], vec4(normal, 0.0) ).xyz;
}