[Bf-blender-cvs] [7e7eaf4] temp-cycles-microdisplacement: Initial OpenSubdiv support
Mai Lavelle
noreply at git.blender.org
Sat Jun 25 15:51:19 CEST 2016
Commit: 7e7eaf46eddde0d1509dd645f2972db3383c7e67
Author: Mai Lavelle
Date: Sat Jun 25 09:35:07 2016 -0400
Branches: temp-cycles-microdisplacement
https://developer.blender.org/rB7e7eaf46eddde0d1509dd645f2972db3383c7e67
Initial OpenSubdiv support
Catmull-Clark subdivision option is now functional. Creases and uv subdivision
will be implemented later.
===================================================================
M intern/cycles/blender/blender_mesh.cpp
M intern/cycles/render/mesh.cpp
M intern/cycles/render/mesh.h
M intern/cycles/render/mesh_subdivision.cpp
===================================================================
diff --git a/intern/cycles/blender/blender_mesh.cpp b/intern/cycles/blender/blender_mesh.cpp
index 2fcbf91..4bf0b3a 100644
--- a/intern/cycles/blender/blender_mesh.cpp
+++ b/intern/cycles/blender/blender_mesh.cpp
@@ -769,6 +769,7 @@ static void create_subd_mesh(Scene *scene,
float dicing_rate,
int max_subdivisions)
{
+ mesh->subdivision_type = (Mesh::SubdivisionType)RNA_enum_get(cmesh, "subdivision_type");
create_mesh(scene, mesh, b_mesh, used_shaders, true);
SubdParams sdparams(mesh, 0, true, false);
diff --git a/intern/cycles/render/mesh.cpp b/intern/cycles/render/mesh.cpp
index 074e887..0cb5d76 100644
--- a/intern/cycles/render/mesh.cpp
+++ b/intern/cycles/render/mesh.cpp
@@ -143,6 +143,8 @@ Mesh::Mesh()
has_surface_bssrdf = false;
num_ngons = 0;
+
+ subdivision_type = SUBDIVISION_NONE;
}
Mesh::~Mesh()
diff --git a/intern/cycles/render/mesh.h b/intern/cycles/render/mesh.h
index 735afa6..0e721c4 100644
--- a/intern/cycles/render/mesh.h
+++ b/intern/cycles/render/mesh.h
@@ -111,6 +111,14 @@ public:
DISPLACE_NUM_METHODS,
};
+ enum SubdivisionType {
+ SUBDIVISION_NONE,
+ SUBDIVISION_LINEAR,
+ SUBDIVISION_CATMULL_CLARK,
+ };
+
+ SubdivisionType subdivision_type;
+
/* Mesh Data */
enum GeometryFlags {
GEOMETRY_NONE = 0,
diff --git a/intern/cycles/render/mesh_subdivision.cpp b/intern/cycles/render/mesh_subdivision.cpp
index 43c36c7..31d19bc 100644
--- a/intern/cycles/render/mesh_subdivision.cpp
+++ b/intern/cycles/render/mesh_subdivision.cpp
@@ -24,8 +24,206 @@
CCL_NAMESPACE_BEGIN
+#ifdef WITH_OPENSUBDIV
+
+CCL_NAMESPACE_END
+
+#include <opensubdiv/far/topologyRefinerFactory.h>
+#include <opensubdiv/far/primvarRefiner.h>
+#include <opensubdiv/far/patchTableFactory.h>
+#include <opensubdiv/far/patchMap.h>
+
+/* specializations of TopologyRefinerFactory for ccl::Mesh */
+
+namespace OpenSubdiv::OPENSUBDIV_VERSION::Far {
+ template<>
+ bool TopologyRefinerFactory<ccl::Mesh>::resizeComponentTopology(TopologyRefiner& refiner, ccl::Mesh const& mesh)
+ {
+ setNumBaseVertices(refiner, mesh.verts.size());
+ setNumBaseFaces(refiner, mesh.subd_faces.size());
+
+ ccl::Mesh::SubdFace* face = &mesh.subd_faces[0];
+
+ for(int i = 0; i < mesh.subd_faces.size(); i++, face++) {
+ setNumBaseFaceVertices(refiner, i, face->num_corners);
+ }
+
+ return true;
+ }
+
+ template<>
+ bool TopologyRefinerFactory<ccl::Mesh>::assignComponentTopology(TopologyRefiner& refiner, ccl::Mesh const& mesh)
+ {
+ ccl::Mesh::SubdFace* face = &mesh.subd_faces[0];
+
+ for(int i = 0; i < mesh.subd_faces.size(); i++, face++) {
+ IndexArray face_verts = getBaseFaceVertices(refiner, i);
+
+ int* corner = &mesh.subd_face_corners[face->start_corner];
+
+ for(int j = 0; j < face->num_corners; j++, corner++) {
+ face_verts[j] = *corner;
+ }
+ }
+
+ return true;
+ }
+
+ template<>
+ bool TopologyRefinerFactory<ccl::Mesh>::assignComponentTags(TopologyRefiner& /*refiner*/, ccl::Mesh const& /*mesh*/)
+ {
+ return true;
+ }
+
+ template<>
+ bool TopologyRefinerFactory<ccl::Mesh>::assignFaceVaryingTopology(TopologyRefiner& /*refiner*/, ccl::Mesh const& /*mesh*/)
+ {
+ return true;
+ }
+
+ template<>
+ void TopologyRefinerFactory<ccl::Mesh>::reportInvalidTopology(TopologyError /*err_code*/,
+ char const */*msg*/, ccl::Mesh const& /*mesh*/)
+ {
+ }
+}
+
+CCL_NAMESPACE_BEGIN
+
+using namespace OpenSubdiv;
+
+/* struct that implements OpenSubdiv's vertex interface */
+
+struct OsdVertex {
+ float3 v;
+
+ OsdVertex() {}
+
+ void Clear(void* = 0) {
+ v = make_float3(0.0f, 0.0f, 0.0f);
+ }
+
+ void AddWithWeight(OsdVertex const& src, float weight) {
+ v += src.v * weight;
+ }
+};
+
+/* class for holding OpenSubdiv data used during tessellation */
+
+class OsdData {
+ Mesh* mesh;
+ vector<OsdVertex> verts;
+ Far::PatchTable* patch_table;
+ Far::PatchMap* patch_map;
+
+public:
+ OsdData() : mesh(NULL), patch_table(NULL), patch_map(NULL) {}
+
+ ~OsdData()
+ {
+ delete patch_table;
+ delete patch_map;
+ }
+
+ void build_from_mesh(Mesh* mesh_)
+ {
+ mesh = mesh_;
+
+ /* type and options */
+ Sdc::SchemeType type = Sdc::SCHEME_CATMARK;
+
+ Sdc::Options options;
+ options.SetVtxBoundaryInterpolation(Sdc::Options::VTX_BOUNDARY_EDGE_ONLY);
+
+ /* create refiner */
+ Far::TopologyRefiner* refiner = Far::TopologyRefinerFactory<Mesh>::Create(*mesh,
+ Far::TopologyRefinerFactory<Mesh>::Options(type, options));
+
+ /* adaptive refinement */
+ int max_isolation = 10;
+ refiner->RefineAdaptive(Far::TopologyRefiner::AdaptiveOptions(max_isolation));
+
+ /* create patch table */
+ Far::PatchTableFactory::Options patch_options;
+ patch_options.endCapType = Far::PatchTableFactory::Options::ENDCAP_GREGORY_BASIS;
+
+ patch_table = Far::PatchTableFactory::Create(*refiner, patch_options);
+
+ /* interpolate verts */
+ int num_refiner_verts = refiner->GetNumVerticesTotal();
+ int num_local_points = patch_table->GetNumLocalPoints();
+
+ verts.resize(num_refiner_verts + num_local_points);
+ for(int i = 0; i < mesh->verts.size(); i++) {
+ verts[i].v = mesh->verts[i];
+ }
+
+ OsdVertex* src = &verts[0];
+ for(int i = 0; i < refiner->GetMaxLevel(); i++) {
+ OsdVertex* dest = src + refiner->GetLevel(i).GetNumVertices();
+ Far::PrimvarRefiner(*refiner).Interpolate(i+1, src, dest);
+ src = dest;
+ }
+
+ patch_table->ComputeLocalPointValues(&verts[0], &verts[num_refiner_verts]);
+
+ /* create patch map */
+ patch_map = new Far::PatchMap(*patch_table);
+ }
+
+ friend struct OsdPatch;
+};
+
+/* ccl::Patch implementation that uses OpenSubdiv for eval */
+
+struct OsdPatch : Patch {
+ OsdData* osd_data;
+
+ OsdPatch(OsdData* data) : osd_data(data) {}
+
+ void eval(float3 *P, float3 *dPdu, float3 *dPdv, float3 *N, float u, float v)
+ {
+ const Far::PatchTable::PatchHandle* handle = osd_data->patch_map->FindPatch(patch_index, u, v);
+ assert(handle);
+
+ float p_weights[20], du_weights[20], dv_weights[20];
+ osd_data->patch_table->EvaluateBasis(*handle, u, v, p_weights, du_weights, dv_weights);
+
+ Far::ConstIndexArray cv = osd_data->patch_table->GetPatchVertices(*handle);
+
+ float3 du, dv;
+ if(P) *P = make_float3(0.0f, 0.0f, 0.0f);
+ du = make_float3(0.0f, 0.0f, 0.0f);
+ dv = make_float3(0.0f, 0.0f, 0.0f);
+
+ for(int i = 0; i < cv.size(); i++) {
+ float3 p = osd_data->verts[cv[i]].v;
+
+ if(P) *P += p * p_weights[i];
+ du += p * du_weights[i];
+ dv += p * dv_weights[i];
+ }
+
+ if(dPdu) *dPdu = du;
+ if(dPdv) *dPdv = dv;
+ if(N) *N = normalize(cross(du, dv));
+ }
+
+ BoundBox bound() { return BoundBox::empty; }
+};
+
+#endif
+
void Mesh::tessellate(DiagSplit *split)
{
+#ifdef WITH_OPENSUBDIV
+ OsdData osd_data;
+
+ if(subdivision_type == SUBDIVISION_CATMULL_CLARK) {
+ osd_data.build_from_mesh(this);
+ }
+#endif
+
int num_faces = subd_faces.size();
Attribute *attr_vN = subd_attributes.find(ATTR_STD_VERTEX_NORMAL);
@@ -36,104 +234,131 @@ void Mesh::tessellate(DiagSplit *split)
if(face.is_quad()) {
/* quad */
- LinearQuadPatch patch;
- float3 *hull = patch.hull;
- float3 *normals = patch.normals;
+ QuadDice::SubPatch subpatch;
- patch.patch_index = face.ptex_offset;
+ LinearQuadPatch quad_patch;
+#ifdef WITH_OPENSUBDIV
+ OsdPatch osd_patch(&osd_data);
- for(int i = 0; i < 4; i++) {
- hull[i] = verts[subd_face_corners[face.start_corner+i]];
+ if(subdivision_type == SUBDIVISION_CATMULL_CLARK) {
+ osd_patch.patch_index = face.ptex_offset;
+
+ subpatch.patch = &osd_patch;
}
+ else
+#endif
+ {
+ float3 *hull = quad_patch.hull;
+ float3 *normals = quad_patch.normals;
+
+ quad_patch.patch_index = face.ptex_offset;
- if(face.smooth) {
for(int i = 0; i < 4; i++) {
- normals[i] = vN[subd_face_corners[face.start_corner+i]];
+ hull[i] = verts[subd_face_corners[face.start_corner+i]];
}
- }
- else {
- float3 N = face.normal(this);
- for(int i = 0; i < 4; i++) {
- normals[i] = N;
+
+ if(face.smooth) {
+ for(int i = 0; i < 4; i++) {
+ normals[i] = vN[subd_face_corners[face.start_corner+i]];
+ }
}
- }
+ else {
+ float3 N = face.normal(this);
+ for(int i = 0; i < 4; i++) {
+ normals[i] = N;
+ }
+ }
+
+ swap(hull[2], hull[3]);
+ swap(normals[2], normals[3]);
- swap(hull[2], hull[3]);
- swap(normals[2], normals[3]);
+ subpatch.patch = &quad_patch;
+ }
/* Quad faces need to be split at least once to line up with split ngons, we do this
* here in this manner because if we do it later edge factors may end up slightly off.
*/
- QuadDice::SubPatch subpatch;
- subpatch.patch = &patch;
-
subpatch.P00 = make_float2(0.0f, 0.0f);
subpatch.P10 = make_float2(0.5f, 0.0f);
subpatch.P01 = make_float2(0.0f, 0.5f);
subpatch.P11 = make_float2(0.5f, 0.5f);
- split->split_quad(&patch, &subpatch);
+ split->split_quad(subpatch.patch, &subpatch);
subpatch.P00 = make_float2(0.5f, 0.0f);
subpatch.P10 = make_float2(1.0f, 0.0f);
subpatch.P01 = make_float2(0.5f, 0.5f);
subpatch.P11 = make_float2(1.0f, 0.5f);
- split->split_quad(&patch, &subpatch);
+ split->split_quad(subpatch.patch, &subpatch);
subpatch.P00 = make_float2(0.0f, 0.5f);
subpatch.P10 = make_float2(0.5f, 0.5f);
subpatch.P01 = make_float2(0.0f, 1.0f);
subpatch.P11 = make_float2(0.5f, 1.0f);
- split->split_quad(&patch, &subpatch);
+ split->split_quad(subpatch.patch, &subpatch);
subpatch.P00 = make_float2(0.5f, 0.5f);
subpatch.P10 = make_float2(1.0f, 0.5f);
subpatch.P01 = make_float2(0.5f, 1.0f);
subpatch.P11 = make_float2(1.0f, 1.0f);
- split->split_quad(&patch, &subpatch);
+ split->split_quad(subpatch.patch, &subpatch);
}
else {
/* ngon */
- float3 center_vert = make_float3(0.0f, 0.0f, 0.0f);
- float3 center_normal = make_float3(0.0f, 0.0f, 0.0f);
+#ifdef WITH_OPENSUBDIV
+ if(subdivision_type == SUBDIVISION_CATMULL_CLARK) {
+ OsdPatch patch(&osd_data);
- float inv_num_corners = 1.0f/float(face.num_corners);
- for(int corner = 0; corner < face.num_corners; corner++) {
- center_vert += verts[subd_face_corners[face.start_corner + corner]] * inv_num_corners;
@@ Diff output truncated at 10240 characters. @@
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