node_modules/three/src/renderers/shaders/ShaderLib/meshnormal.glsl.js

export const vertex = /* glsl */`
#define NORMAL

#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP_TANGENTSPACE )

	varying vec3 vViewPosition;

#endif

#include <common>
#include <batching_pars_vertex>
#include <uv_pars_vertex>
#include <displacementmap_pars_vertex>
#include <normal_pars_vertex>
#include <morphtarget_pars_vertex>
#include <skinning_pars_vertex>
#include <logdepthbuf_pars_vertex>
#include <clipping_planes_pars_vertex>

void main() {

	#include <uv_vertex>
	#include <batching_vertex>

	#include <beginnormal_vertex>
	#include <morphinstance_vertex>
	#include <morphnormal_vertex>
	#include <skinbase_vertex>
	#include <skinnormal_vertex>
	#include <defaultnormal_vertex>
	#include <normal_vertex>

	#include <begin_vertex>
	#include <morphtarget_vertex>
	#include <skinning_vertex>
	#include <displacementmap_vertex>
	#include <project_vertex>
	#include <logdepthbuf_vertex>
	#include <clipping_planes_vertex>

#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP_TANGENTSPACE )

	vViewPosition = - mvPosition.xyz;

#endif

}
`;

export const fragment = /* glsl */`
#define NORMAL

uniform float opacity;

#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP_TANGENTSPACE )

	varying vec3 vViewPosition;

#endif

#include <packing>
#include <uv_pars_fragment>
#include <normal_pars_fragment>
#include <bumpmap_pars_fragment>
#include <normalmap_pars_fragment>
#include <logdepthbuf_pars_fragment>
#include <clipping_planes_pars_fragment>

void main() {

	vec4 diffuseColor = vec4( 0.0, 0.0, 0.0, opacity );

	#include <clipping_planes_fragment>
	#include <logdepthbuf_fragment>
	#include <normal_fragment_begin>
	#include <normal_fragment_maps>

	gl_FragColor = vec4( packNormalToRGB( normal ), diffuseColor.a );

	#ifdef OPAQUE

		gl_FragColor.a = 1.0;

	#endif

}
`;