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

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source/blender/draw/engines/eevee/shaders/volumetric_resolve_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 */

	/* Step 4 : Apply final integration on top of the scene color. */			/* Step 4 : Apply final integration on top of the scene color. */

	uniform sampler2D inSceneDepth;

	/* Blend equation is : FragColor0 + FragColor1 * DstColor */
	#ifdef VOLUMETRICS_ACCUM
	layout(location = 0) out vec4 FragColor0;
	layout(location = 1) out vec4 FragColor1;
	#else
	layout(location = 0, index = 0) out vec4 FragColor0;
	layout(location = 0, index = 1) out vec4 FragColor1;
	#endif

	void main()			void main()
	{			{
	vec2 uvs = gl_FragCoord.xy / vec2(textureSize(inSceneDepth, 0));			vec2 uvs = gl_FragCoord.xy / vec2(textureSize(inSceneDepth, 0));
	float scene_depth = texture(inSceneDepth, uvs).r;			float scene_depth = texture(inSceneDepth, uvs).r;

	vec3 transmittance, scattering;			vec3 transmittance, scattering;
	volumetric_resolve(uvs, scene_depth, transmittance, scattering);			volumetric_resolve(uvs, scene_depth, transmittance, scattering);

	/* Approximate volume alpha by using a monochromatic transmittance			/* Approximate volume alpha by using a monochromatic transmittance
	* and adding it to the scene alpha. */			* and adding it to the scene alpha. */
	float alpha = dot(transmittance, vec3(1.0 / 3.0));			float alpha = dot(transmittance, vec3(1.0 / 3.0));

	FragColor0 = vec4(scattering, 1.0 - alpha);			FragColor0 = vec4(scattering, 1.0 - alpha);
	FragColor1 = vec4(transmittance, alpha);			FragColor1 = vec4(transmittance, alpha);
	}			}