Differential D16125 Diff 56366 source/blender/draw/engines/eevee/shaders/volumetric_lib.glsl

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

Show First 20 Lines • Show All 111 Lines • ▼ Show 20 Lines	vec3 light_volume_light_vector(LightData ld, vec3 P)
}		}
}		}

#define VOLUMETRIC_SHADOW_MAX_STEP 128.0		#define VOLUMETRIC_SHADOW_MAX_STEP 128.0

vec3 participating_media_extinction(vec3 wpos, sampler3D volume_extinction)		vec3 participating_media_extinction(vec3 wpos, sampler3D volume_extinction)
{		{
/* Waiting for proper volume shadowmaps and out of frustum shadow map. */		/* Waiting for proper volume shadowmaps and out of frustum shadow map. */
vec3 ndc = project_point(ViewProjectionMatrix, wpos);		vec3 ndc = project_point(ProjectionMatrix, transform_point(ViewMatrix, wpos));
vec3 volume_co = ndc_to_volume(ndc * 0.5 + 0.5);		vec3 volume_co = ndc_to_volume(ndc * 0.5 + 0.5);

/* Let the texture be clamped to edge. This reduce visual glitches. */		/* Let the texture be clamped to edge. This reduce visual glitches. */
return texture(volume_extinction, volume_co).rgb;		return texture(volume_extinction, volume_co).rgb;
}		}

vec3 light_volume_shadow(LightData ld, vec3 ray_wpos, vec4 l_vector, sampler3D volume_extinction)		vec3 light_volume_shadow(LightData ld, vec3 ray_wpos, vec4 l_vector, sampler3D volume_extinction)
{		{
Show All 13 Lines	#if defined(VOLUME_SHADOW)
}		}

/* Heterogeneous volume shadows */		/* Heterogeneous volume shadows */
float dd = l_vector.w / volShadowSteps;		float dd = l_vector.w / volShadowSteps;
vec3 L = l_vector.xyz / volShadowSteps;		vec3 L = l_vector.xyz / volShadowSteps;

if (ld.l_type == SUN) {		if (ld.l_type == SUN) {
/* For sun light we scan the whole frustum. So we need to get the correct endpoints. */		/* For sun light we scan the whole frustum. So we need to get the correct endpoints. */
vec3 ndcP = project_point(ViewProjectionMatrix, ray_wpos);		vec3 ndcP = project_point(ProjectionMatrix, transform_point(ViewMatrix, ray_wpos));
vec3 ndcL = project_point(ViewProjectionMatrix, ray_wpos + l_vector.xyz) - ndcP;		vec3 ndcL = project_point(ProjectionMatrix,
		transform_point(ViewMatrix, ray_wpos + l_vector.xyz)) -
		ndcP;

vec3 frustum_isect = ndcP + ndcL * line_unit_box_intersect_dist_safe(ndcP, ndcL);		vec3 frustum_isect = ndcP + ndcL * line_unit_box_intersect_dist_safe(ndcP, ndcL);

L = project_point(ViewProjectionMatrixInverse, frustum_isect) - ray_wpos;		vec4 L_hom = ViewMatrixInverse * (ProjectionMatrixInverse * vec4(frustum_isect, 1.0));
		L = (L_hom.xyz / L_hom.w) - ray_wpos;
L /= volShadowSteps;		L /= volShadowSteps;
dd = length(L);		dd = length(L);
}		}

vec3 shadow = vec3(1.0);		vec3 shadow = vec3(1.0);
for (float s = 1.0; s < VOLUMETRIC_SHADOW_MAX_STEP && s <= volShadowSteps; s += 1.0) {		for (float s = 1.0; s < VOLUMETRIC_SHADOW_MAX_STEP && s <= volShadowSteps; s += 1.0) {
vec3 pos = ray_wpos + L * s;		vec3 pos = ray_wpos + L * s;
vec3 s_extinction = participating_media_extinction(pos, volume_extinction);		vec3 s_extinction = participating_media_extinction(pos, volume_extinction);
Show All 35 Lines