diff options
Diffstat (limited to 'source')
-rw-r--r-- | source/blender/blenkernel/intern/displist_tangent.c | 161 | ||||
-rw-r--r-- | source/blender/draw/intern/draw_cache_impl_displist.c | 231 |
2 files changed, 262 insertions, 130 deletions
diff --git a/source/blender/blenkernel/intern/displist_tangent.c b/source/blender/blenkernel/intern/displist_tangent.c index 754aa78c0ac..4ac8d47feba 100644 --- a/source/blender/blenkernel/intern/displist_tangent.c +++ b/source/blender/blenkernel/intern/displist_tangent.c @@ -29,17 +29,21 @@ /* interface */ #include "mikktspace.h" -/** \name Tangent Space Calculation - * \{ */ - -/* Necessary complexity to handle looptri's as quads for correct tangents */ -#define USE_LOOPTRI_DETECT_QUADS - typedef struct { const DispList *dl; float (*tangent)[4]; /* destination */ + /** Face normal for flat shading. */ + float (*fnormals)[3]; + /** Use by surfaces. Size of the surface in faces. */ + int u_len, v_len; } SGLSLDisplistToTangent; +/** \} */ + +/* ---------------------------------------------------------------------- */ +/** \name DL_INDEX3 tangents + * \{ */ + static int dl3_ts_GetNumFaces(const SMikkTSpaceContext *pContext) { SGLSLDisplistToTangent *dlt = pContext->m_pUserData; @@ -102,10 +106,122 @@ static void dl3_ts_SetTSpace(const SMikkTSpaceContext *pContext, dlt->tangent[0][3] = fSign; } -void BKE_displist_tangent_calc(const DispList *dl, float (*fnormals)[3], float (**r_tangent)[4]) +/** \} */ + +/* ---------------------------------------------------------------------- */ +/** \name DL_SURF tangents + * \{ */ + +static int dlsurf_ts_GetNumFaces(const SMikkTSpaceContext *pContext) +{ + SGLSLDisplistToTangent *dlt = pContext->m_pUserData; + + return dlt->v_len * dlt->u_len; +} + +static int dlsurf_ts_GetNumVertsOfFace(const SMikkTSpaceContext *pContext, const int face_num) +{ + UNUSED_VARS(pContext, face_num); + + return 4; +} + +static int face_to_vert_index(SGLSLDisplistToTangent *dlt, + const int face_num, + const int vert_index) +{ + int u = face_num % dlt->u_len; + int v = face_num / dlt->u_len; + + if (vert_index == 0) { + u += 1; + } + else if (vert_index == 1) { + u += 1; + v += 1; + } + else if (vert_index == 2) { + v += 1; + } + + /* Cyclic correction. */ + u = u % dlt->dl->nr; + v = v % dlt->dl->parts; + + return v * dlt->dl->nr + u; +} + +static void dlsurf_ts_GetPosition(const SMikkTSpaceContext *pContext, + float r_co[3], + const int face_num, + const int vert_index) +{ + SGLSLDisplistToTangent *dlt = pContext->m_pUserData; + const float(*verts)[3] = (float(*)[3])dlt->dl->verts; + + copy_v3_v3(r_co, verts[face_to_vert_index(dlt, face_num, vert_index)]); +} + +static void dlsurf_ts_GetTextureCoordinate(const SMikkTSpaceContext *pContext, + float r_uv[2], + const int face_num, + const int vert_index) +{ + SGLSLDisplistToTangent *dlt = pContext->m_pUserData; + + int idx = face_to_vert_index(dlt, face_num, vert_index); + + /* Note: For some reason the shading U and V are swapped compared to the + * one described in the surface format. */ + r_uv[0] = (idx / dlt->dl->nr) / (float)(dlt->v_len); + r_uv[1] = (idx % dlt->dl->nr) / (float)(dlt->u_len); + + if (r_uv[0] == 0.0f && ELEM(vert_index, 1, 2)) { + r_uv[0] = 1.0f; + } + if (r_uv[1] == 0.0f && ELEM(vert_index, 0, 1)) { + r_uv[1] = 1.0f; + } +} + +static void dlsurf_ts_GetNormal(const SMikkTSpaceContext *pContext, + float r_no[3], + const int face_num, + const int vert_index) { - UNUSED_VARS(fnormals); + SGLSLDisplistToTangent *dlt = pContext->m_pUserData; + const float(*nors)[3] = (float(*)[3])dlt->dl->nors; + + if (dlt->fnormals) { + copy_v3_v3(r_no, dlt->fnormals[face_num]); + } + else { + copy_v3_v3(r_no, nors[face_to_vert_index(dlt, face_num, vert_index)]); + } +} + +static void dlsurf_ts_SetTSpace(const SMikkTSpaceContext *pContext, + const float fvTangent[3], + const float fSign, + const int face_num, + const int vert_index) +{ + SGLSLDisplistToTangent *dlt = pContext->m_pUserData; + UNUSED_VARS(face_num, vert_index); + + float *r_tan = dlt->tangent[face_num * 4 + vert_index]; + copy_v3_v3(r_tan, fvTangent); + r_tan[3] = fSign; +} + +/** \} */ + +/* ---------------------------------------------------------------------- */ +/** \name Entry point + * \{ */ +void BKE_displist_tangent_calc(const DispList *dl, float (*fnormals)[3], float (**r_tangent)[4]) +{ if (dl->type == DL_INDEX3) { /* INDEX3 have only one tangent so we don't need actual allocation. */ BLI_assert(*r_tangent != NULL); @@ -128,14 +244,31 @@ void BKE_displist_tangent_calc(const DispList *dl, float (*fnormals)[3], float ( genTangSpaceDefault(&sContext); } else if (dl->type == DL_SURF) { -#if 0 - int vert_len = dl->parts * dl->nr; + SGLSLDisplistToTangent mesh2tangent = { + .dl = dl, + .u_len = dl->nr - ((dl->flag & DL_CYCL_U) ? 0 : 1), + .v_len = dl->parts - ((dl->flag & DL_CYCL_V) ? 0 : 1), + .fnormals = fnormals, + }; + + int loop_len = mesh2tangent.u_len * mesh2tangent.v_len * 4; + if (*r_tangent == NULL) { - *r_tangent = MEM_mallocN(sizeof(float[4]) * vert_len, "displist tangents"); + *r_tangent = MEM_mallocN(sizeof(float[4]) * loop_len, "displist tangents"); } -#endif - /* TODO */ - BLI_assert(0); + mesh2tangent.tangent = *r_tangent; + SMikkTSpaceContext sContext = {NULL}; + SMikkTSpaceInterface sInterface = {NULL}; + sContext.m_pUserData = &mesh2tangent; + sContext.m_pInterface = &sInterface; + sInterface.m_getNumFaces = dlsurf_ts_GetNumFaces; + sInterface.m_getNumVerticesOfFace = dlsurf_ts_GetNumVertsOfFace; + sInterface.m_getPosition = dlsurf_ts_GetPosition; + sInterface.m_getTexCoord = dlsurf_ts_GetTextureCoordinate; + sInterface.m_getNormal = dlsurf_ts_GetNormal; + sInterface.m_setTSpaceBasic = dlsurf_ts_SetTSpace; + /* 0 if failed */ + genTangSpaceDefault(&sContext); } else { /* Unsupported. */ diff --git a/source/blender/draw/intern/draw_cache_impl_displist.c b/source/blender/draw/intern/draw_cache_impl_displist.c index 10f4b7ddbb6..50979d72189 100644 --- a/source/blender/draw/intern/draw_cache_impl_displist.c +++ b/source/blender/draw/intern/draw_cache_impl_displist.c @@ -362,32 +362,6 @@ static void surf_uv_quad(const DispList *dl, const uint quad[4], float r_uv[4][2 } } -static GPUPackedNormal surf_tan_quad(const DispList *dl, - const float (*verts)[3], - const float nor[3], - uint index) -{ - float tan[3], tmp[3]; - - int v = index / dl->nr; - /* Note: For some reason the shading U and V are swapped compared to the - * one described in the surface format. So tangent is along V. */ - if (v == 0) { - sub_v3_v3v3(tan, verts[index + dl->nr], verts[index]); - } - else { - sub_v3_v3v3(tan, verts[index], verts[index - dl->nr]); - } - /* Orthonormalize around the normal. */ - cross_v3_v3v3(tmp, nor, tan); - cross_v3_v3v3(tan, tmp, nor); - normalize_v3(tan); - - GPUPackedNormal ptan = GPU_normal_convert_i10_v3(tan); - ptan.w = 1; /* Pretty sure surfaces cannot have inverted normals. */ - return ptan; -} - static void displist_vertbuf_attr_set_tri_pos_nor_uv(GPUVertBufRaw *pos_step, GPUVertBufRaw *nor_step, GPUVertBufRaw *uv_step, @@ -428,6 +402,54 @@ static void displist_vertbuf_attr_set_tri_pos_nor_uv(GPUVertBufRaw *pos_step, } } +#define SURFACE_QUAD_ITER_START(dl) \ + { \ + uint quad[4]; \ + int quad_index = 0; \ + int max_v = (dl->flag & DL_CYCL_V) ? dl->parts : (dl->parts - 1); \ + int max_u = (dl->flag & DL_CYCL_U) ? dl->nr : (dl->nr - 1); \ + for (int v = 0; v < max_v; v++) { \ + quad[3] = dl->nr * v; \ + quad[0] = quad[3] + 1; \ + quad[2] = quad[3] + dl->nr; \ + quad[1] = quad[0] + dl->nr; \ + /* Cyclic wrap */ \ + if (v == dl->parts - 1) { \ + quad[1] -= dl->parts * dl->nr; \ + quad[2] -= dl->parts * dl->nr; \ + } \ + for (int u = 0; u < max_u; u++, quad_index++) { \ + /* Cyclic wrap */ \ + if (u == dl->nr - 1) { \ + quad[0] -= dl->nr; \ + quad[1] -= dl->nr; \ + } + +#define SURFACE_QUAD_ITER_END \ + quad[2] = quad[1]; \ + quad[1]++; \ + quad[3] = quad[0]; \ + quad[0]++; \ + } \ + } \ + } + +static void displist_surf_fnors_ensure(const DispList *dl, float (**fnors)[3]) +{ + int u_len = dl->nr - ((dl->flag & DL_CYCL_U) ? 0 : 1); + int v_len = dl->parts - ((dl->flag & DL_CYCL_V) ? 0 : 1); + const float(*verts)[3] = (float(*)[3])dl->verts; + float(*nor_flat)[3] = MEM_mallocN(sizeof(float) * 3 * u_len * v_len, __func__); + *fnors = nor_flat; + + SURFACE_QUAD_ITER_START(dl) + { + normal_quad_v3(*nor_flat, verts[quad[0]], verts[quad[1]], verts[quad[2]], verts[quad[3]]); + nor_flat++; + } + SURFACE_QUAD_ITER_END +} + void DRW_displist_vertbuf_create_loop_pos_and_nor_and_uv_and_tan(ListBase *lb, GPUVertBuf *vbo_pos_nor, GPUVertBuf *vbo_uv, @@ -495,7 +517,7 @@ void DRW_displist_vertbuf_create_loop_pos_and_nor_and_uv_and_tan(ListBase *lb, const GPUPackedNormal pnor = GPU_normal_convert_i10_v3(dl->nors); GPUPackedNormal ptan = {0, 0, 0, 1}; - if (tan_step.size != 0) { + if (vbo_tan) { float tan[4]; float(*tan_ptr)[4] = &tan; BKE_displist_tangent_calc(dl, NULL, &tan_ptr); @@ -533,102 +555,81 @@ void DRW_displist_vertbuf_create_loop_pos_and_nor_and_uv_and_tan(ListBase *lb, } } else if (dl->type == DL_SURF) { - uint quad[4]; - for (int a = 0; a < dl->parts; a++) { - if ((dl->flag & DL_CYCL_V) == 0 && a == dl->parts - 1) { - break; + float(*tangents)[4] = NULL; + float(*fnors)[3] = NULL; + + if (!is_smooth) { + displist_surf_fnors_ensure(dl, &fnors); + } + + if (vbo_tan) { + BKE_displist_tangent_calc(dl, fnors, &tangents); + } + + SURFACE_QUAD_ITER_START(dl) + { + if (vbo_uv) { + surf_uv_quad(dl, quad, uv); } - int b; - if (dl->flag & DL_CYCL_U) { - quad[0] = dl->nr * a; - quad[3] = quad[0] + dl->nr - 1; - quad[1] = quad[0] + dl->nr; - quad[2] = quad[3] + dl->nr; - b = 0; + GPUPackedNormal pnors_quad[4]; + if (is_smooth) { + for (int j = 0; j < 4; j++) { + pnors_quad[j] = GPU_normal_convert_i10_v3(nors[quad[j]]); + } } else { - quad[3] = dl->nr * a; - quad[0] = quad[3] + 1; - quad[2] = quad[3] + dl->nr; - quad[1] = quad[0] + dl->nr; - b = 1; - } - if ((dl->flag & DL_CYCL_V) && a == dl->parts - 1) { - quad[1] -= dl->parts * dl->nr; - quad[2] -= dl->parts * dl->nr; + pnors_quad[0] = GPU_normal_convert_i10_v3(fnors[quad_index]); + pnors_quad[1] = pnors_quad[2] = pnors_quad[3] = pnors_quad[0]; } - for (; b < dl->nr; b++) { - if (vbo_uv) { - surf_uv_quad(dl, quad, uv); - } - - GPUPackedNormal pnors_quad[4]; - GPUPackedNormal ptans_quad[4]; - if (is_smooth) { - for (int j = 0; j < 4; j++) { - pnors_quad[j] = GPU_normal_convert_i10_v3(nors[quad[j]]); - if (tan_step.size != 0) { - /* TODO(fclem) This is a waste of computation power because the same vertex - * is computed 4 times. */ - ptans_quad[j] = surf_tan_quad(dl, verts, nors[quad[j]], quad[j]); - } - } + GPUPackedNormal ptans_quad[4]; + if (vbo_tan) { + for (int j = 0; j < 4; j++) { + float *tan = tangents[quad_index * 4 + j]; + ptans_quad[j] = GPU_normal_convert_i10_v3(tan); + ptans_quad[j].w = (tan[3] > 0.0f) ? 1 : -2; } - else { - float nor_flat[3]; - normal_quad_v3( - nor_flat, verts[quad[0]], verts[quad[1]], verts[quad[2]], verts[quad[3]]); - if (tan_step.size != 0) { - for (int j = 0; j < 4; j++) { - ptans_quad[j] = surf_tan_quad(dl, verts, nor_flat, quad[j]); - } - } - pnors_quad[0] = GPU_normal_convert_i10_v3(nor_flat); - pnors_quad[1] = pnors_quad[2] = pnors_quad[3] = pnors_quad[0]; - } - - displist_vertbuf_attr_set_tri_pos_nor_uv(&pos_step, - &nor_step, - &uv_step, - &tan_step, - verts[quad[2]], - verts[quad[0]], - verts[quad[1]], - &pnors_quad[2], - &pnors_quad[0], - &pnors_quad[1], - &ptans_quad[2], - &ptans_quad[0], - &ptans_quad[1], - uv[2], - uv[0], - uv[1]); + } - displist_vertbuf_attr_set_tri_pos_nor_uv(&pos_step, - &nor_step, - &uv_step, - &tan_step, - verts[quad[0]], - verts[quad[2]], - verts[quad[3]], - &pnors_quad[0], - &pnors_quad[2], - &pnors_quad[3], - &ptans_quad[0], - &ptans_quad[2], - &ptans_quad[3], - uv[0], - uv[2], - uv[3]); + displist_vertbuf_attr_set_tri_pos_nor_uv(&pos_step, + &nor_step, + &uv_step, + &tan_step, + verts[quad[2]], + verts[quad[0]], + verts[quad[1]], + &pnors_quad[2], + &pnors_quad[0], + &pnors_quad[1], + &ptans_quad[2], + &ptans_quad[0], + &ptans_quad[1], + uv[2], + uv[0], + uv[1]); - quad[2] = quad[1]; - quad[1]++; - quad[3] = quad[0]; - quad[0]++; - } + displist_vertbuf_attr_set_tri_pos_nor_uv(&pos_step, + &nor_step, + &uv_step, + &tan_step, + verts[quad[0]], + verts[quad[2]], + verts[quad[3]], + &pnors_quad[0], + &pnors_quad[2], + &pnors_quad[3], + &ptans_quad[0], + &ptans_quad[2], + &ptans_quad[3], + uv[0], + uv[2], + uv[3]); } + SURFACE_QUAD_ITER_END + + MEM_SAFE_FREE(tangents); + MEM_SAFE_FREE(fnors); } else { BLI_assert(dl->type == DL_INDEX4); @@ -656,9 +657,7 @@ void DRW_displist_vertbuf_create_loop_pos_and_nor_and_uv_and_tan(ListBase *lb, normal_quad_v3(nor_flat, verts[idx[0]], verts[idx[1]], verts[idx[2]], verts[idx[3]]); } pnors_idx[0] = GPU_normal_convert_i10_v3(nor_flat); - pnors_idx[1] = pnors_idx[0]; - pnors_idx[2] = pnors_idx[0]; - pnors_idx[3] = pnors_idx[0]; + pnors_idx[1] = pnors_idx[2] = pnors_idx[3] = pnors_idx[0]; } displist_vertbuf_attr_set_tri_pos_nor_uv(&pos_step, |