From a8383cced02619178e37019d3d3dc904d31d44a9 Mon Sep 17 00:00:00 2001 From: Trammell Hudson Date: Sun, 22 Feb 2015 17:32:06 -0500 Subject: [PATCH] move corners to inside of the face, rather than end-caps. --- corners.c | 105 +++++++++++++++++++++++++++++++++-------------- tetrahedron.scad | 2 +- 2 files changed, 75 insertions(+), 32 deletions(-) diff --git a/corners.c b/corners.c index 90a4677..48287c1 100644 --- a/corners.c +++ b/corners.c @@ -1,6 +1,8 @@ /** \file * Generate an OpenSCAD with connectors for each face. * + * Options are inside only (with face flush on outside) + * or with a slot for the face (like a corner cap) */ #include #include @@ -14,18 +16,44 @@ #include "stl_3d.h" +static v3_t avg_x, avg_y, avg_z; + +static void +print_multmatrix( + const refframe_t * const ref, + const int transpose +) +{ + printf("multmatrix(m=[" + "[%f,%f,%f,0]," + "[%f,%f,%f,0]," + "[%f,%f,%f,0]," + "[ 0, 0, 0,1]])\n", + transpose ? ref->x.p[0] : ref->x.p[0], + transpose ? ref->x.p[1] : ref->y.p[0], + transpose ? ref->x.p[2] : ref->z.p[0], + transpose ? ref->y.p[0] : ref->x.p[1], + transpose ? ref->y.p[1] : ref->y.p[1], + transpose ? ref->y.p[2] : ref->z.p[1], + transpose ? ref->z.p[0] : ref->x.p[2], + transpose ? ref->z.p[1] : ref->y.p[2], + transpose ? ref->z.p[2] : ref->z.p[2] + ); +} + static void make_faces( const stl_3d_t * const stl, const stl_vertex_t * const v, const double thickness, + const double translate, const double inset_dist, const double hole_dist, - const double hole_rad + const double hole_rad, + const double hole_height ) { int * const face_used = calloc(sizeof(*face_used), stl->num_face); - const double hole_height = 40; // generate all of the coplanar polygons at this vertex const stl_vertex_t ** const vertex_list = calloc(sizeof(**vertex_list), stl->num_vertex); @@ -53,24 +81,21 @@ make_faces( f->vertex[(start_vertex+2) % 3]->p ); + avg_x = v3_add(avg_x, ref.x); + avg_y = v3_add(avg_y, ref.y); + avg_z = v3_add(avg_z, ref.z); + // use the transpose of the rotation matrix, // which will rotate from (x,y) to the correct // orientation relative to this connector node. - printf("multmatrix(m=[[%f,%f,%f,0],[%f,%f,%f,0],[%f,%f,%f,0],[0,0,0,1]]) {\n", - ref.x.p[0], - ref.y.p[0], - ref.z.p[0], - ref.x.p[1], - ref.y.p[1], - ref.z.p[1], - ref.x.p[2], - ref.y.p[2], - ref.z.p[2] - ); + print_multmatrix(&ref, 0); + printf("{\n"); // generate the polygon plane + if (thickness != 0) + { printf("translate([0,0,%f]) linear_extrude(height=%f) polygon(points=[\n", - -thickness/2, + translate, thickness ); @@ -85,9 +110,10 @@ make_faces( printf("[%f,%f],", x, y); } printf("\n]);\n"); + } - // generate the mounting holes - if (hole_rad) + // generate the mounting holes/pins + if (hole_rad != 0) { for(int k=0 ; k < vertex_count ; k++) { @@ -97,7 +123,7 @@ make_faces( vertex_list[(k+1) % vertex_count]->p, vertex_list[(k+2) % vertex_count]->p ); - printf("translate([%f,%f,0]) cylinder(r=%f,h=%f, center=true, $fs=1);\n", + printf("translate([%f,%f,0]) cylinder(r=%f,h=%f, $fs=1);\n", x, y, hole_rad, hole_height @@ -121,39 +147,56 @@ main(void) return EXIT_FAILURE; const double thickness = 3; const double inset_dist = 2; - const double hole_dist = 7; + const double hole_dist = 5; const double hole_rad = 3.3/2; - const double hole_height = 40; // for each vertex, find the coplanar triangles // \todo: do coplanar bits - for(int i = 18 ; i < stl->num_vertex ; i++) + for(int i = 0 ; i < stl->num_vertex ; i++) { const stl_vertex_t * const v = &stl->vertex[i]; const v3_t origin = v->p; printf("// vertex %d\n" "//translate([%f,%f,%f])\n" - "render() difference()\n" "{\n" - "//sphere(r=%f);\n", - i, origin.p[0], origin.p[1], origin.p[2], thickness/2); + "render() difference()\n" + "{\n", + i, origin.p[0], origin.p[1], origin.p[2]); + avg_x.p[0] = avg_x.p[1] = avg_x.p[2] = 0; + avg_y.p[0] = avg_y.p[1] = avg_y.p[2] = 0; + avg_z.p[0] = avg_z.p[1] = avg_z.p[2] = 0; - printf("render() intersection() {\n"); - printf("sphere(r=20);\nunion() {\n"); - make_faces(stl, v, 2*thickness, -thickness/2, 0, 0); - printf("}\n"); - printf("}\n"); - - make_faces(stl, v, thickness, inset_dist, hole_dist, hole_rad); - + //printf("render() intersection() {\n"); + printf("union() {\n"); + make_faces(stl, v, thickness, -thickness, 0, 0, 0, 0); printf("}\n"); + //printf("}\n"); + + printf("union() {\n"); + // slice away the outer bits + make_faces(stl, v, thickness, 0, -thickness, 0, 0, 0); + //make_faces(stl, v, thickness, inset_dist, hole_dist, hole_rad); + printf("}\n"); + + + printf("} // difference\n"); + + // add back in the mounting pegs + make_faces(stl, v, 0, 0, 0, hole_dist, hole_rad, thickness); + printf("} // union\n"); break; //if (i == 0) break; // only do one right now } + refframe_t avg; + refframe_init(&avg, avg_x, avg_y, avg_z); + printf("%%"); + print_multmatrix(&avg, 1); + //printf("translate([0,0,20]) sphere(r=2);\n"); + printf("cube([50,50,50], center=true);\n"); return 0; } diff --git a/tetrahedron.scad b/tetrahedron.scad index dda36e7..a7964df 100644 --- a/tetrahedron.scad +++ b/tetrahedron.scad @@ -16,4 +16,4 @@ module tetrahedron() ); } -scale(100) tetrahedron(); +scale(50) tetrahedron();