Differential D12888 Diff 43495 intern/cycles/kernel/kernel_emission.h

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intern/cycles/kernel/kernel_emission.h

Show All 19 Lines
#include "kernel/kernel_montecarlo.h"		#include "kernel/kernel_montecarlo.h"
#include "kernel/kernel_path_state.h"		#include "kernel/kernel_path_state.h"
#include "kernel/kernel_shader.h"		#include "kernel/kernel_shader.h"

CCL_NAMESPACE_BEGIN		CCL_NAMESPACE_BEGIN

/* Evaluate shader on light. */		/* Evaluate shader on light. */
ccl_device_noinline_cpu float3		ccl_device_noinline_cpu float3
light_sample_shader_eval(INTEGRATOR_STATE_ARGS,		light_sample_shader_eval(KernelGlobals kg,
		IntegratorState state,
ccl_private ShaderData *ccl_restrict emission_sd,		ccl_private ShaderData *ccl_restrict emission_sd,
ccl_private LightSample *ccl_restrict ls,		ccl_private LightSample *ccl_restrict ls,
float time)		float time)
{		{
/* setup shading at emitter */		/* setup shading at emitter */
float3 eval = zero_float3();		float3 eval = zero_float3();

if (shader_constant_emission_eval(kg, ls->shader, &eval)) {		if (shader_constant_emission_eval(kg, ls->shader, &eval)) {
Show All 31 Lines	#endif
}		}

PROFILING_SHADER(emission_sd->object, emission_sd->shader);		PROFILING_SHADER(emission_sd->object, emission_sd->shader);
PROFILING_EVENT(PROFILING_SHADE_LIGHT_EVAL);		PROFILING_EVENT(PROFILING_SHADE_LIGHT_EVAL);

/* No proper path flag, we're evaluating this for all closures. that's		/* No proper path flag, we're evaluating this for all closures. that's
* weak but we'd have to do multiple evaluations otherwise. */		* weak but we'd have to do multiple evaluations otherwise. */
shader_eval_surface<KERNEL_FEATURE_NODE_MASK_SURFACE_LIGHT>(		shader_eval_surface<KERNEL_FEATURE_NODE_MASK_SURFACE_LIGHT>(
INTEGRATOR_STATE_PASS, emission_sd, NULL, PATH_RAY_EMISSION);		kg, state, emission_sd, NULL, PATH_RAY_EMISSION);

/* Evaluate closures. */		/* Evaluate closures. */
#ifdef __BACKGROUND_MIS__		#ifdef __BACKGROUND_MIS__
if (ls->type == LIGHT_BACKGROUND) {		if (ls->type == LIGHT_BACKGROUND) {
eval = shader_background_eval(emission_sd);		eval = shader_background_eval(emission_sd);
}		}
else		else
#endif		#endif
Show All 15 Lines
/* Test if light sample is from a light or emission from geometry. */		/* Test if light sample is from a light or emission from geometry. */
ccl_device_inline bool light_sample_is_light(ccl_private const LightSample *ccl_restrict ls)		ccl_device_inline bool light_sample_is_light(ccl_private const LightSample *ccl_restrict ls)
{		{
/* return if it's a lamp for shadow pass */		/* return if it's a lamp for shadow pass */
return (ls->prim == PRIM_NONE && ls->type != LIGHT_BACKGROUND);		return (ls->prim == PRIM_NONE && ls->type != LIGHT_BACKGROUND);
}		}

/* Early path termination of shadow rays. */		/* Early path termination of shadow rays. */
ccl_device_inline bool light_sample_terminate(ccl_global const KernelGlobals *ccl_restrict kg,		ccl_device_inline bool light_sample_terminate(KernelGlobals kg,
ccl_private const LightSample *ccl_restrict ls,		ccl_private const LightSample *ccl_restrict ls,
ccl_private BsdfEval *ccl_restrict eval,		ccl_private BsdfEval *ccl_restrict eval,
const float rand_terminate)		const float rand_terminate)
{		{
if (bsdf_eval_is_zero(eval)) {		if (bsdf_eval_is_zero(eval)) {
return true;		return true;
}		}

Show All 11 Lines	ccl_device_inline bool light_sample_terminate(KernelGlobals kg,
return false;		return false;
}		}

/* This function should be used to compute a modified ray start position for		/* This function should be used to compute a modified ray start position for
* rays leaving from a surface. The algorithm slightly distorts flat surface		* rays leaving from a surface. The algorithm slightly distorts flat surface
* of a triangle. Surface is lifted by amount h along normal n in the incident		* of a triangle. Surface is lifted by amount h along normal n in the incident
* point. */		* point. */

ccl_device_inline float3		ccl_device_inline float3 shadow_ray_smooth_surface_offset(
shadow_ray_smooth_surface_offset(ccl_global const KernelGlobals *ccl_restrict kg,		KernelGlobals kg, ccl_private const ShaderData *ccl_restrict sd, float3 Ng)
ccl_private const ShaderData *ccl_restrict sd,
float3 Ng)
{		{
float3 V[3], N[3];		float3 V[3], N[3];
triangle_vertices_and_normals(kg, sd->prim, V, N);		triangle_vertices_and_normals(kg, sd->prim, V, N);

const float u = sd->u, v = sd->v;		const float u = sd->u, v = sd->v;
const float w = 1 - u - v;		const float w = 1 - u - v;
float3 P = V[0] * u + V[1] * v + V[2] * w; /* Local space */		float3 P = V[0] * u + V[1] * v + V[2] * w; /* Local space */
float3 n = N[0] * u + N[1] * v + N[2] * w; /* We get away without normalization */		float3 n = N[0] * u + N[1] * v + N[2] * w; /* We get away without normalization */
Show All 27 Lines	else {
h = min(-min(min(h0, h1), h2), h * 0.5f);		h = min(-min(min(h0, h1), h2), h * 0.5f);
}		}

return n * h;		return n * h;
}		}

/* Ray offset to avoid shadow terminator artifact. */		/* Ray offset to avoid shadow terminator artifact. */

ccl_device_inline float3 shadow_ray_offset(ccl_global const KernelGlobals *ccl_restrict kg,		ccl_device_inline float3 shadow_ray_offset(KernelGlobals kg,
ccl_private const ShaderData *ccl_restrict sd,		ccl_private const ShaderData *ccl_restrict sd,
float3 L)		float3 L)
{		{
float NL = dot(sd->N, L);		float NL = dot(sd->N, L);
bool transmit = (NL < 0.0f);		bool transmit = (NL < 0.0f);
float3 Ng = (transmit ? -sd->Ng : sd->Ng);		float3 Ng = (transmit ? -sd->Ng : sd->Ng);
float3 P = ray_offset(sd->P, Ng);		float3 P = ray_offset(sd->P, Ng);

▲ Show 20 Lines • Show All 50 Lines • ▼ Show 20 Lines	ccl_device_inline void shadow_ray_setup(ccl_private const ShaderData *ccl_restrict sd,

ray->dP = differential_make_compact(sd->dP);		ray->dP = differential_make_compact(sd->dP);
ray->dD = differential_zero_compact();		ray->dD = differential_zero_compact();
ray->time = sd->time;		ray->time = sd->time;
}		}

/* Create shadow ray towards light sample. */		/* Create shadow ray towards light sample. */
ccl_device_inline void light_sample_to_surface_shadow_ray(		ccl_device_inline void light_sample_to_surface_shadow_ray(
ccl_global const KernelGlobals *ccl_restrict kg,		KernelGlobals kg,
ccl_private const ShaderData *ccl_restrict sd,		ccl_private const ShaderData *ccl_restrict sd,
ccl_private const LightSample *ccl_restrict ls,		ccl_private const LightSample *ccl_restrict ls,
ccl_private Ray *ray)		ccl_private Ray *ray)
{		{
const float3 P = shadow_ray_offset(kg, sd, ls->D);		const float3 P = shadow_ray_offset(kg, sd, ls->D);
shadow_ray_setup(sd, ls, P, ray);		shadow_ray_setup(sd, ls, P, ray);
}		}

/* Create shadow ray towards light sample. */		/* Create shadow ray towards light sample. */
ccl_device_inline void light_sample_to_volume_shadow_ray(		ccl_device_inline void light_sample_to_volume_shadow_ray(
ccl_global const KernelGlobals *ccl_restrict kg,		KernelGlobals kg,
ccl_private const ShaderData *ccl_restrict sd,		ccl_private const ShaderData *ccl_restrict sd,
ccl_private const LightSample *ccl_restrict ls,		ccl_private const LightSample *ccl_restrict ls,
const float3 P,		const float3 P,
ccl_private Ray *ray)		ccl_private Ray *ray)
{		{
shadow_ray_setup(sd, ls, P, ray);		shadow_ray_setup(sd, ls, P, ray);
}		}

CCL_NAMESPACE_END		CCL_NAMESPACE_END