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Cycles: mist pass added, with start/depth/falloff control. If the pass is

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enabled in a render layer a Mist Pass panel will be shown in the world
properties.
This commit is contained in:
Brecht Van Lommel
2013-06-07 12:45:26 +00:00
parent ddee696bc7
commit a604fb730d
8 changed files with 102 additions and 6 deletions
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27
intern/cycles/kernel/kernel_passes.h
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@@ -86,6 +86,31 @@ __device_inline void kernel_write_data_passes(KernelGlobals *kg, __global float
L->color_glossy += shader_bsdf_glossy(kg, sd)*throughput;
if(flag & (PASS_TRANSMISSION_INDIRECT|PASS_TRANSMISSION_COLOR|PASS_TRANSMISSION_DIRECT))
L->color_transmission += shader_bsdf_transmission(kg, sd)*throughput;
if(flag & PASS_MIST) {
/* bring depth into 0..1 range */
float mist_start = kernel_data.film.mist_start;
float mist_inv_depth = kernel_data.film.mist_inv_depth;
float depth = camera_distance(kg, sd->P);
float mist = clamp((depth - mist_start)*mist_inv_depth, 0.0f, 1.0f);
/* falloff */
float mist_falloff = kernel_data.film.mist_falloff;
if(mist_falloff == 1.0f)
;
else if(mist_falloff == 2.0f)
mist = mist*mist;
else if(mist_falloff == 0.5f)
mist = sqrtf(mist);
else
mist = powf(mist, mist_falloff);
/* modulate by transparency */
float3 alpha = throughput*(make_float3(1.0f, 1.0f, 1.0f) - shader_bsdf_transparency(kg, sd));
L->mist += (1.0f - mist)*average(alpha);
}
#endif
}
@@ -128,6 +153,8 @@ __device_inline void kernel_write_light_passes(KernelGlobals *kg, __global float
shadow.w = kernel_data.film.pass_shadow_scale;
kernel_write_pass_float4(buffer + kernel_data.film.pass_shadow, sample, shadow);
}
if(flag & PASS_MIST)
kernel_write_pass_float(buffer + kernel_data.film.pass_mist, sample, L->mist);
#endif
}