static void set_default_value(ShaderInput *input, BL::Node b_node, BL::NodeSocket b_sock, BL::BlendData b_data, BL::ID b_id)
{
/* copy values for non linked inputs */
switch(input->type) {
case SHADER_SOCKET_FLOAT: {
input->set(get_float(b_sock.ptr, "default_value"));
break;
}
case SHADER_SOCKET_INT: {
input->set((float)get_int(b_sock.ptr, "default_value"));
break;
}
case SHADER_SOCKET_COLOR: {
input->set(float4_to_float3(get_float4(b_sock.ptr, "default_value")));
break;
}
case SHADER_SOCKET_NORMAL:
case SHADER_SOCKET_POINT:
case SHADER_SOCKET_VECTOR: {
input->set(get_float3(b_sock.ptr, "default_value"));
break;
}
case SHADER_SOCKET_STRING: {
input->set((ustring)blender_absolute_path(b_data, b_id, get_string(b_sock.ptr, "default_value")));
break;
}
case SHADER_SOCKET_CLOSURE:
case SHADER_SOCKET_UNDEFINED:
break;
}
}
/* TODO(sergey): Not really optimal, consider approaches based on k-DOP in order
* to reduce number of objects which are wrongly considered visible.
*/
bool BlenderObjectCulling::test_camera(Scene *scene, float3 bb[8])
{
Camera *cam = scene->camera;
const ProjectionTransform& worldtondc = cam->worldtondc;
float3 bb_min = make_float3(FLT_MAX, FLT_MAX, FLT_MAX),
bb_max = make_float3(-FLT_MAX, -FLT_MAX, -FLT_MAX);
bool all_behind = true;
for(int i = 0; i < 8; ++i) {
float3 p = bb[i];
float4 b = make_float4(p.x, p.y, p.z, 1.0f);
float4 c = make_float4(dot(worldtondc.x, b),
dot(worldtondc.y, b),
dot(worldtondc.z, b),
dot(worldtondc.w, b));
p = float4_to_float3(c / c.w);
if(c.z < 0.0f) {
p.x = 1.0f - p.x;
p.y = 1.0f - p.y;
}
if(c.z >= -camera_cull_margin_) {
all_behind = false;
}
bb_min = min(bb_min, p);
bb_max = max(bb_max, p);
}
if(all_behind) {
return true;
}
return (bb_min.x >= 1.0f + camera_cull_margin_ ||
bb_min.y >= 1.0f + camera_cull_margin_ ||
bb_max.x <= -camera_cull_margin_ ||
bb_max.y <= -camera_cull_margin_);
}
void BVHSpatialSplit::split_curve_primitive(const Mesh *mesh,
const Transform *tfm,
int prim_index,
int segment_index,
int dim,
float pos,
BoundBox& left_bounds,
BoundBox& right_bounds)
{
/* curve split: NOTE - Currently ignores curve width and needs to be fixed.*/
const int k0 = mesh->curves[prim_index].first_key + segment_index;
const int k1 = k0 + 1;
const float4& key0 = mesh->curve_keys[k0];
const float4& key1 = mesh->curve_keys[k1];
float3 v0 = float4_to_float3(key0);
float3 v1 = float4_to_float3(key1);
if(tfm != NULL) {
v0 = transform_point(tfm, v0);
v1 = transform_point(tfm, v1);
}
float v0p = v0[dim];
float v1p = v1[dim];
/* insert vertex to the boxes it belongs to. */
if(v0p <= pos)
left_bounds.grow(v0);
if(v0p >= pos)
right_bounds.grow(v0);
if(v1p <= pos)
left_bounds.grow(v1);
if(v1p >= pos)
right_bounds.grow(v1);
/* edge intersects the plane => insert intersection to both boxes. */
if((v0p < pos && v1p > pos) || (v0p > pos && v1p < pos)) {
float3 t = lerp(v0, v1, clamp((pos - v0p) / (v1p - v0p), 0.0f, 1.0f));
left_bounds.grow(t);
right_bounds.grow(t);
}
}
/* TODO(sergey): Not really optimal, consider approaches based on k-DOP in order
* to reduce number of objects which are wrongly considered visible.
*/
static bool object_boundbox_clip(Scene *scene,
BL::Object& b_ob,
Transform& tfm,
float margin)
{
Camera *cam = scene->camera;
Transform& worldtondc = cam->worldtondc;
BL::Array<float, 24> boundbox = b_ob.bound_box();
float3 bb_min = make_float3(FLT_MAX, FLT_MAX, FLT_MAX),
bb_max = make_float3(-FLT_MAX, -FLT_MAX, -FLT_MAX);
bool all_behind = true;
for(int i = 0; i < 8; ++i) {
float3 p = make_float3(boundbox[3 * i + 0],
boundbox[3 * i + 1],
boundbox[3 * i + 2]);
p = transform_point(&tfm, p);
float4 b = make_float4(p.x, p.y, p.z, 1.0f);
float4 c = make_float4(dot(worldtondc.x, b),
dot(worldtondc.y, b),
dot(worldtondc.z, b),
dot(worldtondc.w, b));
p = float4_to_float3(c / c.w);
if(c.z < 0.0f) {
p.x = 1.0f - p.x;
p.y = 1.0f - p.y;
}
if(c.z >= -margin) {
all_behind = false;
}
bb_min = min(bb_min, p);
bb_max = max(bb_max, p);
}
if(!all_behind) {
if(bb_min.x >= 1.0f + margin ||
bb_min.y >= 1.0f + margin ||
bb_max.x <= -margin ||
bb_max.y <= -margin)
{
return true;
}
return false;
}
return true;
}
static void set_default_value(ShaderInput *input,
BL::NodeSocket& b_sock,
BL::BlendData& b_data,
BL::ID& b_id)
{
Node *node = input->parent;
const SocketType& socket = input->socket_type;
/* copy values for non linked inputs */
switch(input->type()) {
case SocketType::FLOAT: {
node->set(socket, get_float(b_sock.ptr, "default_value"));
break;
}
case SocketType::INT: {
node->set(socket, get_int(b_sock.ptr, "default_value"));
break;
}
case SocketType::COLOR: {
node->set(socket, float4_to_float3(get_float4(b_sock.ptr, "default_value")));
break;
}
case SocketType::NORMAL:
case SocketType::POINT:
case SocketType::VECTOR: {
node->set(socket, get_float3(b_sock.ptr, "default_value"));
break;
}
case SocketType::STRING: {
node->set(socket, (ustring)blender_absolute_path(b_data, b_id, get_string(b_sock.ptr, "default_value")));
break;
}
default:
break;
}
}
static void mikk_compute_tangents(BL::Mesh& b_mesh,
BL::MeshTextureFaceLayer *b_layer,
Mesh *mesh,
const vector<int>& nverts,
const vector<int>& face_flags,
bool need_sign,
bool active_render)
{
/* setup userdata */
MikkUserData userdata(b_mesh, b_layer, nverts.size());
/* setup interface */
SMikkTSpaceInterface sm_interface;
memset(&sm_interface, 0, sizeof(sm_interface));
sm_interface.m_getNumFaces = mikk_get_num_faces;
sm_interface.m_getNumVerticesOfFace = mikk_get_num_verts_of_face;
sm_interface.m_getPosition = mikk_get_position;
sm_interface.m_getTexCoord = mikk_get_texture_coordinate;
sm_interface.m_getNormal = mikk_get_normal;
sm_interface.m_setTSpaceBasic = mikk_set_tangent_space;
/* setup context */
SMikkTSpaceContext context;
memset(&context, 0, sizeof(context));
context.m_pUserData = &userdata;
context.m_pInterface = &sm_interface;
/* compute tangents */
genTangSpaceDefault(&context);
/* create tangent attributes */
Attribute *attr;
ustring name;
if(b_layer != NULL)
name = ustring((string(b_layer->name().c_str()) + ".tangent").c_str());
else
name = ustring("orco.tangent");
if(active_render)
attr = mesh->attributes.add(ATTR_STD_UV_TANGENT, name);
else
attr = mesh->attributes.add(name, TypeDesc::TypeVector, ATTR_ELEMENT_CORNER);
float3 *tangent = attr->data_float3();
/* create bitangent sign attribute */
float *tangent_sign = NULL;
if(need_sign) {
Attribute *attr_sign;
ustring name_sign;
if(b_layer != NULL)
name_sign = ustring((string(b_layer->name().c_str()) + ".tangent_sign").c_str());
else
name_sign = ustring("orco.tangent_sign");
if(active_render)
attr_sign = mesh->attributes.add(ATTR_STD_UV_TANGENT_SIGN, name_sign);
else
attr_sign = mesh->attributes.add(name_sign, TypeDesc::TypeFloat, ATTR_ELEMENT_CORNER);
tangent_sign = attr_sign->data_float();
}
for(int i = 0; i < nverts.size(); i++) {
int tri_a[3], tri_b[3];
face_split_tri_indices(nverts[i], face_flags[i], tri_a, tri_b);
tangent[0] = float4_to_float3(userdata.tangent[i*4 + tri_a[0]]);
tangent[1] = float4_to_float3(userdata.tangent[i*4 + tri_a[1]]);
tangent[2] = float4_to_float3(userdata.tangent[i*4 + tri_a[2]]);
tangent += 3;
if(tangent_sign) {
tangent_sign[0] = userdata.tangent[i*4 + tri_a[0]].w;
tangent_sign[1] = userdata.tangent[i*4 + tri_a[1]].w;
tangent_sign[2] = userdata.tangent[i*4 + tri_a[2]].w;
tangent_sign += 3;
}
if(nverts[i] == 4) {
tangent[0] = float4_to_float3(userdata.tangent[i*4 + tri_b[0]]);
tangent[1] = float4_to_float3(userdata.tangent[i*4 + tri_b[1]]);
tangent[2] = float4_to_float3(userdata.tangent[i*4 + tri_b[2]]);
tangent += 3;
if(tangent_sign) {
tangent_sign[0] = userdata.tangent[i*4 + tri_b[0]].w;
tangent_sign[1] = userdata.tangent[i*4 + tri_b[1]].w;
tangent_sign[2] = userdata.tangent[i*4 + tri_b[2]].w;
tangent_sign += 3;
}
}
}
}