Differential D2105 Diff 7058 intern/cycles/kernel/geom/geom_triangle_intersect.h

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intern/cycles/kernel/geom/geom_triangle_intersect.h

Show First 20 Lines • Show All 249 Lines • ▼ Show 20 Lines	if((sign_T < 0.0f) \|\|
(sign_T > tmax * xor_signmask(det, sign_det)))		(sign_T > tmax * xor_signmask(det, sign_det)))
{		{
return;		return;
}		}

/* Normalize U, V, W, and T. */		/* Normalize U, V, W, and T. */
const float inv_det = 1.0f / det;		const float inv_det = 1.0f / det;

		const float t = T * inv_det;
		for(int i = min(max_hits, ss_isect->num_hits); i >= 0; --i) {
		if(ss_isect->hits[i].t == t) {
		return;
		}
		}

ss_isect->num_hits++;		ss_isect->num_hits++;
int hit;		int hit;

if(ss_isect->num_hits <= max_hits) {		if(ss_isect->num_hits <= max_hits) {
hit = ss_isect->num_hits - 1;		hit = ss_isect->num_hits - 1;
}		}
else {		else {
/* reservoir sampling: if we are at the maximum number of		/* reservoir sampling: if we are at the maximum number of
* hits, randomly replace element or skip it */		* hits, randomly replace element or skip it */
hit = lcg_step_uint(lcg_state) % ss_isect->num_hits;		hit = lcg_step_uint(lcg_state) % ss_isect->num_hits;

if(hit >= max_hits)		if(hit >= max_hits)
return;		return;
}		}

/* record intersection */		/* record intersection */
Intersection *isect = &ss_isect->hits[hit];		Intersection *isect = &ss_isect->hits[hit];
isect->prim = triAddr;		isect->prim = triAddr;
isect->object = object;		isect->object = object;
isect->type = PRIMITIVE_TRIANGLE;		isect->type = PRIMITIVE_TRIANGLE;
isect->u = U * inv_det;		isect->u = U * inv_det;
isect->v = V * inv_det;		isect->v = V * inv_det;
isect->t = T * inv_det;		isect->t = t;

/* Record geometric normal. */		/* Record geometric normal. */
/* TODO(sergey): Use float4_to_float3() on just an edges. */		/* TODO(sergey): Use float4_to_float3() on just an edges. */
const float3 v0 = float4_to_float3(tri_a);		const float3 v0 = float4_to_float3(tri_a);
const float3 v1 = float4_to_float3(tri_b);		const float3 v1 = float4_to_float3(tri_b);
const float3 v2 = float4_to_float3(tri_c);		const float3 v2 = float4_to_float3(tri_c);
ss_isect->Ng[hit] = normalize(cross(v1 - v0, v2 - v0));		ss_isect->Ng[hit] = normalize(cross(v1 - v0, v2 - v0));
}		}
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