Differential D16243 Diff 58431 source/blender/draw/engines/eevee/shaders/volumetric_frag.glsl

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source/blender/draw/engines/eevee/shaders/volumetric_frag.glsl


	#pragma BLENDER_REQUIRE(volumetric_lib.glsl)			#pragma BLENDER_REQUIRE(volumetric_lib.glsl)

	/* Based on Frosbite Unified Volumetric.			/* Based on Frosbite Unified Volumetric.
	* https://www.ea.com/frostbite/news/physically-based-unified-volumetric-rendering-in-frostbite */			* https://www.ea.com/frostbite/news/physically-based-unified-volumetric-rendering-in-frostbite */

	/* Store volumetric properties into the froxel textures. */			/* Store volumetric properties into the froxel textures. */

	flat in int slice;

	/* WARNING: these are not attributes, these are global vars. */			/* WARNING: these are not attributes, these are global vars. */
	vec3 worldPosition = vec3(0.0);			vec3 worldPosition = vec3(0.0);
	vec3 objectPosition = vec3(0.0);			vec3 objectPosition = vec3(0.0);
	vec3 viewPosition = vec3(0.0);			vec3 viewPosition = vec3(0.0);
	vec3 viewNormal = vec3(0.0);			vec3 viewNormal = vec3(0.0);
	vec3 volumeOrco = vec3(0.0);			vec3 volumeOrco = vec3(0.0);

	layout(location = 0) out vec4 volumeScattering;
	layout(location = 1) out vec4 volumeExtinction;
	layout(location = 2) out vec4 volumeEmissive;
	layout(location = 3) out vec4 volumePhase;

	int attr_id = 0;			int attr_id = 0;

	#ifndef CLEAR			#ifndef CLEAR
	GlobalData init_globals(void)			GlobalData init_globals(void)
	{			{
	GlobalData surf;			GlobalData surf;
	surf.P = worldPosition;			surf.P = worldPosition;
	surf.N = vec3(0.0);			surf.N = vec3(0.0);
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	vec3 coordinate_incoming(vec3 P)			vec3 coordinate_incoming(vec3 P)
	{			{
	return cameraVec(P);			return cameraVec(P);
	}			}
	#endif			#endif

	void main()			void main()
	{			{
	ivec3 volume_cell = ivec3(ivec2(gl_FragCoord.xy), slice);			ivec3 volume_cell = ivec3(ivec2(gl_FragCoord.xy), volumetric_geom_iface.slice);
	vec3 ndc_cell = volume_to_ndc((vec3(volume_cell) + volJitter.xyz) * volInvTexSize.xyz);			vec3 ndc_cell = volume_to_ndc((vec3(volume_cell) + volJitter.xyz) * volInvTexSize.xyz);

	viewPosition = get_view_space_from_depth(ndc_cell.xy, ndc_cell.z);			viewPosition = get_view_space_from_depth(ndc_cell.xy, ndc_cell.z);
	worldPosition = point_view_to_world(viewPosition);			worldPosition = point_view_to_world(viewPosition);
	#ifdef MESH_SHADER			#ifdef MESH_SHADER
	objectPosition = point_world_to_object(worldPosition);			objectPosition = point_world_to_object(worldPosition);
	volumeOrco = OrcoTexCoFactors[0].xyz + objectPosition * OrcoTexCoFactors[1].xyz;			volumeOrco = OrcoTexCoFactors[0].xyz + objectPosition * OrcoTexCoFactors[1].xyz;

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	#ifdef CLEAR			#ifdef CLEAR
	volumeScattering = vec4(0.0, 0.0, 0.0, 1.0);			volumeScattering = vec4(0.0, 0.0, 0.0, 1.0);
	volumeExtinction = vec4(0.0, 0.0, 0.0, 1.0);			volumeExtinction = vec4(0.0, 0.0, 0.0, 1.0);
	volumeEmissive = vec4(0.0, 0.0, 0.0, 1.0);			volumeEmissive = vec4(0.0, 0.0, 0.0, 1.0);
	volumePhase = vec4(0.0, 0.0, 0.0, 0.0);			volumePhase = vec4(0.0, 0.0, 0.0, 0.0);
	#else			#else
	g_data = init_globals();			g_data = init_globals();
				# ifndef NO_ATTRIB_LOAD
	attrib_load();			attrib_load();
				# endif
	Closure cl = nodetree_exec();			Closure cl = nodetree_exec();
	# ifdef MESH_SHADER			# ifdef MESH_SHADER
	cl.scatter *= drw_volume.density_scale;			cl.scatter *= drw_volume.density_scale;
	cl.absorption *= drw_volume.density_scale;			cl.absorption *= drw_volume.density_scale;
	cl.emission *= drw_volume.density_scale;			cl.emission *= drw_volume.density_scale;
	# endif			# endif

	volumeScattering = vec4(cl.scatter, 1.0);			volumeScattering = vec4(cl.scatter, 1.0);
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