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

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source/blender/draw/engines/eevee/shaders/volumetric_integration_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 3 : Integrate for each froxel the final amount of light		/* Step 3 : Integrate for each froxel the final amount of light
* scattered back to the viewer and the amount of transmittance. */		* scattered back to the viewer and the amount of transmittance. */

uniform sampler3D volumeScattering; /* Result of the scatter step */		/* Globals when using OPTI */
uniform sampler3D volumeExtinction;

#ifdef USE_VOLUME_OPTI		#ifdef USE_VOLUME_OPTI
uniform layout(r11f_g11f_b10f) writeonly restrict image3D finalScattering_img;
uniform layout(r11f_g11f_b10f) writeonly restrict image3D finalTransmittance_img;

vec3 finalScattering;		vec3 finalScattering;
vec3 finalTransmittance;		vec3 finalTransmittance;
#else

flat in int slice;

layout(location = 0) out vec3 finalScattering;
layout(location = 1) out vec3 finalTransmittance;
#endif		#endif

void main()		void main()
{		{
/* Start with full transmittance and no scattered light. */		/* Start with full transmittance and no scattered light. */
finalScattering = vec3(0.0);		finalScattering = vec3(0.0);
finalTransmittance = vec3(1.0);		finalTransmittance = vec3(1.0);

Show All 12 Lines	void main()
if (ProjectionMatrix[3][3] == 0.0) {		if (ProjectionMatrix[3][3] == 0.0) {
prev_ray_len = length(view_cell);		prev_ray_len = length(view_cell);
orig_ray_len = prev_ray_len / view_cell.z;		orig_ray_len = prev_ray_len / view_cell.z;
}		}

#ifdef USE_VOLUME_OPTI		#ifdef USE_VOLUME_OPTI
int slice = textureSize(volumeScattering, 0).z;		int slice = textureSize(volumeScattering, 0).z;
ivec2 texco = ivec2(gl_FragCoord.xy);		ivec2 texco = ivec2(gl_FragCoord.xy);
		#else
		int slice = volumetric_geom_iface.slice;
#endif		#endif
for (int i = 0; i <= slice; i++) {		for (int i = 0; i <= slice; i++) {
ivec3 volume_cell = ivec3(ivec2(gl_FragCoord.xy), i);		ivec3 volume_cell = ivec3(ivec2(gl_FragCoord.xy), i);

vec3 Lscat = texelFetch(volumeScattering, volume_cell, 0).rgb;		vec3 Lscat = texelFetch(volumeScattering, volume_cell, 0).rgb;
vec3 s_extinction = texelFetch(volumeExtinction, volume_cell, 0).rgb;		vec3 s_extinction = texelFetch(volumeExtinction, volume_cell, 0).rgb;

float cell_depth = volume_z_to_view_z((float(i) + 1.0) / tex_size.z);		float cell_depth = volume_z_to_view_z((float(i) + 1.0) / tex_size.z);
Show All 29 Lines