160 lines
3.4 KiB
C
160 lines
3.4 KiB
C
/** \file
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* Generate an OpenSCAD with connectors for each face.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdarg.h>
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#include <unistd.h>
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#include <math.h>
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#include <err.h>
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#include <assert.h>
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#include "v3.h"
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#include "stl_3d.h"
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static void
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make_faces(
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const stl_3d_t * const stl,
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const stl_vertex_t * const v,
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const double thickness,
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const double inset_dist,
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const double hole_dist,
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const double hole_rad
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)
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{
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int * const face_used = calloc(sizeof(*face_used), stl->num_face);
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const double hole_height = 40;
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// generate all of the coplanar polygons at this vertex
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const stl_vertex_t ** const vertex_list = calloc(sizeof(**vertex_list), stl->num_vertex);
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for (int j = 0 ; j < v->num_face; j++)
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{
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// generate the polygon face for this vertex
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const stl_face_t * const f = v->face[j];
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if (face_used[f - stl->face])
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continue;
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const int start_vertex = v->face_num[j];
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const int vertex_count = stl_trace_face(
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stl,
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f,
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vertex_list,
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face_used,
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start_vertex
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);
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refframe_t ref;
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refframe_init(&ref,
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f->vertex[(start_vertex+0) % 3]->p,
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f->vertex[(start_vertex+1) % 3]->p,
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f->vertex[(start_vertex+2) % 3]->p
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);
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// use the transpose of the rotation matrix,
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// which will rotate from (x,y) to the correct
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// orientation relative to this connector node.
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printf("multmatrix(m=[[%f,%f,%f,0],[%f,%f,%f,0],[%f,%f,%f,0],[0,0,0,1]]) {\n",
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ref.x.p[0],
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ref.y.p[0],
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ref.z.p[0],
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ref.x.p[1],
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ref.y.p[1],
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ref.z.p[1],
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ref.x.p[2],
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ref.y.p[2],
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ref.z.p[2]
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);
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// generate the polygon plane
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printf("translate([0,0,%f]) linear_extrude(height=%f) polygon(points=[\n",
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-thickness/2,
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thickness
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);
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for(int k=0 ; k < vertex_count ; k++)
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{
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double x, y;
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refframe_inset(&ref, inset_dist, &x, &y,
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vertex_list[(k+0) % vertex_count]->p,
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vertex_list[(k+1) % vertex_count]->p,
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vertex_list[(k+2) % vertex_count]->p
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);
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printf("[%f,%f],", x, y);
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}
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printf("\n]);\n");
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// generate the mounting holes
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if (hole_rad)
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{
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for(int k=0 ; k < vertex_count ; k++)
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{
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double x, y;
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refframe_inset(&ref, inset_dist+hole_dist, &x, &y,
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vertex_list[(k+0) % vertex_count]->p,
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vertex_list[(k+1) % vertex_count]->p,
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vertex_list[(k+2) % vertex_count]->p
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);
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printf("translate([%f,%f,0]) cylinder(r=%f,h=%f, center=true, $fs=1);\n",
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x, y,
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hole_rad,
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hole_height
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);
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}
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}
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printf("}\n");
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}
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free(face_used);
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free(vertex_list);
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}
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int
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main(void)
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{
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stl_3d_t * const stl = stl_3d_parse(STDIN_FILENO);
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if (!stl)
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return EXIT_FAILURE;
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const double thickness = 3;
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const double inset_dist = 2;
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const double hole_dist = 4;
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const double hole_rad = 3.0/2;
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const double hole_height = 40;
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// for each vertex, find the coplanar triangles
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// \todo: do coplanar bits
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for(int i = 18 ; i < stl->num_vertex ; i++)
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{
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const stl_vertex_t * const v = &stl->vertex[i];
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const v3_t origin = v->p;
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printf("// vertex %d\n"
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"//translate([%f,%f,%f])\n"
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"render() difference()\n"
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"{\n"
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"//sphere(r=%f);\n",
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i, origin.p[0], origin.p[1], origin.p[2], thickness/2);
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printf("render() intersection() {\n");
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printf("sphere(r=20);\nunion() {\n");
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make_faces(stl, v, 2*thickness, -thickness/2, 0, 0);
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printf("}\n");
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printf("}\n");
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make_faces(stl, v, thickness, inset_dist, hole_dist, hole_rad);
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printf("}\n");
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break;
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//if (i == 0) break; // only do one right now
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}
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return 0;
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}
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