Handy Models geometry improvement. (#10092)

* helper disk by code

Co-Authored-By: Ian Bassi <12130714+ianalexis@users.noreply.github.com>

* Torus

Delete torus.stl

Co-Authored-By: Ian Bassi <12130714+ianalexis@users.noreply.github.com>

* traingle count tunning

Co-Authored-By: Ian Bassi <12130714+ianalexis@users.noreply.github.com>

* Update TriangleMesh.hpp

Co-Authored-By: Ian Bassi <12130714+ianalexis@users.noreply.github.com>

* adjusting disk diameter

---------

Co-authored-by: Ian Bassi <12130714+ianalexis@users.noreply.github.com>
Co-authored-by: Noisyfox <timemanager.rick@gmail.com>

src/libslic3r/TriangleMesh.cpp

@@ -1004,6 +1004,62 @@ indexed_triangle_set its_make_frustum(double r, double h, double fa)
     return mesh;
 }
 
+// Generate the mesh for a torus
+// r: major radius (distance from center of tube to center of torus)
+// h: minor radius (radius of the tube)
+// fa: angular step in radians (smaller = more segments)
+indexed_triangle_set its_make_torus(double r, double h, double fa)
+{
+    indexed_triangle_set mesh;
+    auto& vertices = mesh.vertices;
+    auto& facets = mesh.indices;
+
+    // Number of segments around the main ring and the tube
+    size_t n_major = (size_t)ceil(2. * PI / fa);
+    size_t n_minor = (size_t)ceil(2. * PI / fa);
+
+    double major_step = 2. * PI / n_major;
+    double minor_step = 2. * PI / n_minor;
+
+    // Reserve memory for performance
+    vertices.reserve(n_major * n_minor);
+    facets.reserve(n_major * n_minor * 2);
+
+    // Generate vertices
+    for (size_t i = 0; i < n_major; ++i) {
+        double major_angle = i * major_step;
+        double cos_major = cos(major_angle);
+        double sin_major = sin(major_angle);
+        for (size_t j = 0; j < n_minor; ++j) {
+            double minor_angle = j * minor_step;
+            double cos_minor = cos(minor_angle);
+            double sin_minor = sin(minor_angle);
+            // Parametric equation for torus
+            float x = float((r + h * cos_minor) * cos_major);
+            float y = float((r + h * cos_minor) * sin_major);
+            float z = float(h * sin_minor);
+            vertices.emplace_back(Vec3f(x, y, z));
+        }
+    }
+
+    // Generate faces
+    for (size_t i = 0; i < n_major; ++i) {
+        size_t inext = (i + 1) % n_major;
+        for (size_t j = 0; j < n_minor; ++j) {
+            size_t jnext = (j + 1) % n_minor;
+            int v0 = int(i * n_minor + j);
+            int v1 = int(inext * n_minor + j);
+            int v2 = int(inext * n_minor + jnext);
+            int v3 = int(i * n_minor + jnext);
+            // Two triangles per quad
+            facets.emplace_back(v0, v1, v2);
+            facets.emplace_back(v0, v2, v3);
+        }
+    }
+
+    return mesh;
+}
+
 indexed_triangle_set its_make_cone(double r, double h, double fa)
 {
     indexed_triangle_set mesh;

src/libslic3r/TriangleMesh.hpp

@@ -335,9 +335,10 @@ inline Vec3f its_face_normal(const indexed_triangle_set &its, const int face_idx
 
 indexed_triangle_set    its_make_cube(double x, double y, double z);
 indexed_triangle_set    its_make_prism(float width, float length, float height);
-indexed_triangle_set    its_make_cylinder(double r, double h, double fa=(2*PI/360));
+indexed_triangle_set    its_make_cylinder(double r, double h, double fa=(2*PI/180));
-indexed_triangle_set    its_make_cone(double r, double h, double fa=(2*PI/360));
+indexed_triangle_set    its_make_cone(double r, double h, double fa=(2*PI/180));
-indexed_triangle_set    its_make_frustum(double r, double h, double fa=(2*PI/360));
+indexed_triangle_set    its_make_frustum(double r, double h, double fa=(2*PI/180));
+indexed_triangle_set    its_make_torus(double r, double h, double fa);
 indexed_triangle_set    its_make_frustum_dowel(double r, double h, int sectorCount);
 indexed_triangle_set    its_make_pyramid(float base, float height);
 indexed_triangle_set    its_make_sphere(double radius, double fa);
@@ -349,10 +350,11 @@ inline indexed_triangle_set its_convex_hull(const indexed_triangle_set &its) { r
 
 inline TriangleMesh     make_cube(double x, double y, double z)                 { return TriangleMesh(its_make_cube(x, y, z)); }
 inline TriangleMesh     make_prism(float width, float length, float height)     { return TriangleMesh(its_make_prism(width, length, height)); }
-inline TriangleMesh     make_cylinder(double r, double h, double fa=(2*PI/360)) { return TriangleMesh{its_make_cylinder(r, h, fa)}; }
+inline TriangleMesh     make_cylinder(double r, double h, double fa=(2*PI/180)) { return TriangleMesh{its_make_cylinder(r, h, fa)}; }
-inline TriangleMesh     make_cone(double r, double h, double fa=(2*PI/360))     { return TriangleMesh(its_make_cone(r, h, fa)); }
+inline TriangleMesh     make_cone(double r, double h, double fa=(2*PI/180))     { return TriangleMesh(its_make_cone(r, h, fa)); }
 inline TriangleMesh     make_pyramid(float base, float height)                  { return TriangleMesh(its_make_pyramid(base, height)); }
-inline TriangleMesh     make_sphere(double rho, double fa=(2*PI/360))           { return TriangleMesh(its_make_sphere(rho, fa)); }
+inline TriangleMesh     make_sphere(double rho, double fa=(2*PI/90))            { return TriangleMesh(its_make_sphere(rho, fa)); }
+inline TriangleMesh     make_torus(double r, double h, double fa=(PI/60))       { return TriangleMesh(its_make_torus(r, h, fa)); }
 
 bool        its_write_stl_ascii(const char *file, const char *label, const std::vector<stl_triangle_vertex_indices> &indices, const std::vector<stl_vertex> &vertices);
 inline bool its_write_stl_ascii(const char *file, const char *label, const indexed_triangle_set &its) { return its_write_stl_ascii(file, label, its.indices, its.vertices); }

src/slic3r/GUI/GUI_ObjectList.cpp

@@ -2147,17 +2147,17 @@ static TriangleMesh create_mesh(const std::string& type_name, const BoundingBoxf
     else if (type_name == "Sphere")
         // Centered around 0, half the sphere below the print bed, half above.
         // The sphere has the same volume as the box above.
-        mesh = TriangleMesh(its_make_sphere(0.5 * side, PI / 18));
+        mesh = TriangleMesh(its_make_sphere(0.5 * side, PI / 90));
     else if (type_name == "Slab")
         // Sitting on the print bed, left front front corner at (0, 0).
         mesh = TriangleMesh(its_make_cube(bb.size().x() * 1.5, bb.size().y() * 1.5, bb.size().z() * 0.5));
     else if (type_name == "Cone")
         mesh = TriangleMesh(its_make_cone(0.5 * side, side));
     else if (type_name == "Disc")
-        mesh.ReadSTLFile((Slic3r::resources_dir() + "/handy_models/helper_disk.stl").c_str(), true, nullptr);
+        mesh = TriangleMesh(its_make_cylinder(0.5 * side, 0.2f));
     else if (type_name == "Torus")
-        mesh.ReadSTLFile((Slic3r::resources_dir() + "/handy_models/torus.stl").c_str(), true, nullptr);
+        mesh = TriangleMesh(its_make_torus(0.5 * side, 0.125 * side,(PI / 60)));
-    return TriangleMesh(mesh);
+    return mesh;
 }
 
 void ObjectList::load_generic_subobject(const std::string& type_name, const ModelVolumeType type)