diff options
Diffstat (limited to 'intern/cycles/kernel/geom')
-rw-r--r-- | intern/cycles/kernel/geom/geom_triangle_intersect.h | 148 |
1 files changed, 21 insertions, 127 deletions
diff --git a/intern/cycles/kernel/geom/geom_triangle_intersect.h b/intern/cycles/kernel/geom/geom_triangle_intersect.h index 12700c7a246..ea2ee5c3536 100644 --- a/intern/cycles/kernel/geom/geom_triangle_intersect.h +++ b/intern/cycles/kernel/geom/geom_triangle_intersect.h @@ -48,145 +48,39 @@ ccl_device_inline bool triangle_intersect(KernelGlobals *kg, int object, int prim_addr) { - const int kx = isect_precalc->kx; - const int ky = isect_precalc->ky; - const int kz = isect_precalc->kz; - const float Sx = isect_precalc->Sx; - const float Sy = isect_precalc->Sy; - const float Sz = isect_precalc->Sz; - - /* Calculate vertices relative to ray origin. */ const uint tri_vindex = kernel_tex_fetch(__prim_tri_index, prim_addr); #if defined(__KERNEL_AVX2__) && defined(__KERNEL_SSE__) - const avxf avxf_P(P.m128, P.m128); - - const ssef *ssef_verts = (ssef*)&kg->__prim_tri_verts.data[tri_vindex]; - const avxf tri_ab = _mm256_loadu_ps((float *)(ssef_verts)); - const avxf tri_bc = _mm256_loadu_ps((float *)(ssef_verts + 1)); - - const avxf AB = tri_ab - avxf_P; - const avxf BC = tri_bc - avxf_P; - - const __m256i permute_mask = _mm256_set_epi32(0x3, kz, ky, kx, 0x3, kz, ky, kx); - - const avxf AB_k = shuffle(AB, permute_mask); - const avxf BC_k = shuffle(BC, permute_mask); - - /* Akz, Akz, Bkz, Bkz, Bkz, Bkz, Ckz, Ckz */ - const avxf ABBC_kz = shuffle<2>(AB_k, BC_k); - - /* Akx, Aky, Bkx, Bky, Bkx,Bky, Ckx, Cky */ - const avxf ABBC_kxy = shuffle<0,1,0,1>(AB_k, BC_k); - - const avxf Sxy(Sy, Sx, Sy, Sx); - - /* Ax, Ay, Bx, By, Bx, By, Cx, Cy */ - const avxf ABBC_xy = nmadd(ABBC_kz, Sxy, ABBC_kxy); - - float ABBC_kz_array[8]; - _mm256_storeu_ps((float*)&ABBC_kz_array, ABBC_kz); - - const float A_kz = ABBC_kz_array[0]; - const float B_kz = ABBC_kz_array[2]; - const float C_kz = ABBC_kz_array[6]; - - /* By, Bx, Cy, Cx, By, Bx, Ay, Ax */ - const avxf BCBA_yx = permute<3,2,7,6,3,2,1,0>(ABBC_xy); - - const avxf neg_mask(0,0,0,0,0x80000000, 0x80000000, 0x80000000, 0x80000000); - - /* W U V - * (AxBy-AyBx) (BxCy-ByCx) XX XX (BxBy-ByBx) (CxAy-CyAx) XX XX - */ - const avxf WUxxxxVxx_neg = _mm256_hsub_ps(ABBC_xy * BCBA_yx, neg_mask /* Dont care */); - - const avxf WUVWnegWUVW = permute<0,1,5,0,0,1,5,0>(WUxxxxVxx_neg) ^ neg_mask; - - /* Calculate scaled barycentric coordinates. */ - float WUVW_array[4]; - _mm_storeu_ps((float*)&WUVW_array, _mm256_castps256_ps128 (WUVWnegWUVW)); - - const float W = WUVW_array[0]; - const float U = WUVW_array[1]; - const float V = WUVW_array[2]; - - const int WUVW_mask = 0x7 & _mm256_movemask_ps(WUVWnegWUVW); - const int WUVW_zero = 0x7 & _mm256_movemask_ps(_mm256_cmp_ps(WUVWnegWUVW, - _mm256_setzero_ps(), 0)); - - if(!((WUVW_mask == 7) || (WUVW_mask == 0)) && ((WUVW_mask | WUVW_zero) != 7)) { - return false; - } + const ssef *verts = (ssef*)&kg->__prim_tri_verts.data[tri_vindex]; #else const float4 tri_a = kernel_tex_fetch(__prim_tri_verts, tri_vindex+0), tri_b = kernel_tex_fetch(__prim_tri_verts, tri_vindex+1), tri_c = kernel_tex_fetch(__prim_tri_verts, tri_vindex+2); - const float3 A = make_float3(tri_a.x - P.x, tri_a.y - P.y, tri_a.z - P.z); - const float3 B = make_float3(tri_b.x - P.x, tri_b.y - P.y, tri_b.z - P.z); - const float3 C = make_float3(tri_c.x - P.x, tri_c.y - P.y, tri_c.z - P.z); - - const float A_kx = IDX(A, kx), A_ky = IDX(A, ky), A_kz = IDX(A, kz); - const float B_kx = IDX(B, kx), B_ky = IDX(B, ky), B_kz = IDX(B, kz); - const float C_kx = IDX(C, kx), C_ky = IDX(C, ky), C_kz = IDX(C, kz); - - /* Perform shear and scale of vertices. */ - const float Ax = A_kx - Sx * A_kz; - const float Ay = A_ky - Sy * A_kz; - const float Bx = B_kx - Sx * B_kz; - const float By = B_ky - Sy * B_kz; - const float Cx = C_kx - Sx * C_kz; - const float Cy = C_ky - Sy * C_kz; - - /* Calculate scaled barycentric coordinates. */ - float U = Cx * By - Cy * Bx; - float V = Ax * Cy - Ay * Cx; - float W = Bx * Ay - By * Ax; - if((U < 0.0f || V < 0.0f || W < 0.0f) && - (U > 0.0f || V > 0.0f || W > 0.0f)) - { - return false; - } + const float3 verts[3] = {float4_to_float3(tri_a), + float4_to_float3(tri_b), + float4_to_float3(tri_c)}; #endif - - /* Calculate determinant. */ - float det = U + V + W; - if(UNLIKELY(det == 0.0f)) { - return false; - } - - /* Calculate scaled z-coordinates of vertices and use them to calculate - * the hit distance. - */ - const float T = (U * A_kz + V * B_kz + W * C_kz) * Sz; - const int sign_det = (__float_as_int(det) & 0x80000000); - const float sign_T = xor_signmask(T, sign_det); - if((sign_T < 0.0f) || - (sign_T > isect->t * xor_signmask(det, sign_det))) + float t, u, v; + if(ray_triangle_intersect(isect_precalc, + P, isect->t, + verts, + &u, &v, &t)) { - return false; - } - #ifdef __VISIBILITY_FLAG__ - /* visibility flag test. we do it here under the assumption - * that most triangles are culled by node flags */ - if(kernel_tex_fetch(__prim_visibility, prim_addr) & visibility) + /* Visibility flag test. we do it here under the assumption + * that most triangles are culled by node flags. + */ + if(kernel_tex_fetch(__prim_visibility, prim_addr) & visibility) #endif - { -#ifdef __KERNEL_CUDA__ - if(A == B && B == C) { - return false; + { + isect->prim = prim_addr; + isect->object = object; + isect->type = PRIMITIVE_TRIANGLE; + isect->u = u; + isect->v = v; + isect->t = t; + return true; } -#endif - /* Normalize U, V, W, and T. */ - const float inv_det = 1.0f / det; - isect->prim = prim_addr; - isect->object = object; - isect->type = PRIMITIVE_TRIANGLE; - isect->u = U * inv_det; - isect->v = V * inv_det; - isect->t = T * inv_det; - return true; } return false; } |