3DPrinting/PrusaSlicer-NonPlainar
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Fixed export of toolpaths to obj files

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This commit is contained in:
enricoturri1966 2020-09-01 14:35:42 +02:00
parent 5f27b0f851
commit d3346e4512
2 changed files with 35 additions and 8 deletions
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25
src/slic3r/GUI/GCodeViewer.cpp
View File

@ -608,9 +608,15 @@ void GCodeViewer::export_toolpaths_to_obj(const char* filename) const
glsafe(::glGetBufferSubData(GL_ARRAY_BUFFER, 0, buffer.vertices.data_size_bytes(), vertices.data()));
glsafe(::glBindBuffer(GL_ARRAY_BUFFER, 0));
auto get_vertex = [&vertices, floats_per_vertex](size_t id) {
// get indices data from index buffer on gpu
std::vector<unsigned int> indices = std::vector<unsigned int>(buffer.indices.count);
glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffer.indices.id));
glsafe(::glGetBufferSubData(GL_ELEMENT_ARRAY_BUFFER, 0, static_cast<GLsizeiptr>(indices.size() * sizeof(unsigned int)), indices.data()));
glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0));
auto get_vertex = [&vertices, floats_per_vertex](unsigned int id) {
// extract vertex from vector of floats
size_t base_id = id * floats_per_vertex;
unsigned int base_id = id * floats_per_vertex;
return Vec3f(vertices[base_id + 0], vertices[base_id + 1], vertices[base_id + 2]);
};
@ -626,7 +632,7 @@ void GCodeViewer::export_toolpaths_to_obj(const char* filename) const
float length;
};
auto generate_segment = [get_vertex](size_t start_id, float half_width, float half_height) {
auto generate_segment = [get_vertex](unsigned int start_id, unsigned int end_id, float half_width, float half_height) {
auto local_basis = [](const Vec3f& dir) {
// calculate local basis (dir, right, up) on given segment
std::array<Vec3f, 3> ret;
@ -650,13 +656,16 @@ void GCodeViewer::export_toolpaths_to_obj(const char* filename) const
};
Vec3f v1 = get_vertex(start_id) - half_height * Vec3f::UnitZ();
Vec3f v2 = get_vertex(start_id + 1) - half_height * Vec3f::UnitZ();
Vec3f v2 = get_vertex(end_id) - half_height * Vec3f::UnitZ();
float length = (v2 - v1).norm();
const auto&& [dir, right, up] = local_basis(v2 - v1);
return Segment({ v1, v2, dir, right, up, half_width * right, half_height * up, length });
};
size_t out_vertices_count = 0;
unsigned int indices_per_segment = buffer.indices_per_segment();
unsigned int start_vertex_offset = buffer.start_segment_vertex_offset();
unsigned int end_vertex_offset = buffer.end_segment_vertex_offset();
for (size_t i = 0; i < buffer.render_paths.size(); ++i) {
// get paths segments from buffer paths
@ -675,9 +684,8 @@ void GCodeViewer::export_toolpaths_to_obj(const char* filename) const
unsigned int start = static_cast<unsigned int>(render_path.offsets[j] / sizeof(unsigned int));
unsigned int end = start + render_path.sizes[j];
for (size_t k = start; k < end; k += 2) {
Segment curr = generate_segment(k, half_width, half_height);
for (size_t k = start; k < end; k += static_cast<size_t>(indices_per_segment)) {
Segment curr = generate_segment(indices[k + start_vertex_offset], indices[k + end_vertex_offset], half_width, half_height);
if (k == start) {
// starting endpoint vertices/normals
out_vertices.push_back(curr.v1 + curr.rl_displacement); out_normals.push_back(curr.right); // right
@ -699,7 +707,8 @@ void GCodeViewer::export_toolpaths_to_obj(const char* filename) const
out_vertices.push_back(curr.v1 - curr.rl_displacement); out_normals.push_back(-curr.right); // left
out_vertices_count += 2;
Segment prev = generate_segment(k - 2, half_width, half_height);
size_t first_vertex_id = k - static_cast<size_t>(indices_per_segment);
Segment prev = generate_segment(indices[first_vertex_id + start_vertex_offset], indices[first_vertex_id + end_vertex_offset], half_width, half_height);
Vec3f med_dir = (prev.dir + curr.dir).normalized();
float disp = half_width * ::tan(::acos(std::clamp(curr.dir.dot(med_dir), -1.0f, 1.0f)));
Vec3f disp_vec = disp * prev.dir;

18
src/slic3r/GUI/GCodeViewer.hpp
View File

@ -176,6 +176,24 @@ class GCodeViewer
default: { return 0; }
}
}
unsigned int start_segment_vertex_offset() const {
switch (render_primitive_type)
{
case ERenderPrimitiveType::Point:
case ERenderPrimitiveType::Line:
case ERenderPrimitiveType::Triangle:
default: { return 0; }
}
}
unsigned int end_segment_vertex_offset() const {
switch (render_primitive_type)
{
case ERenderPrimitiveType::Point: { return 0; }
case ERenderPrimitiveType::Line: { return 1; }
case ERenderPrimitiveType::Triangle: { return 36; } // 1 vertex of 13th triangle
default: { return 0; }
}
}
};
// helper to render shells