130 lines
2.5 KiB
C
130 lines
2.5 KiB
C
/** \file
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* Generate an svg file with the polygonal faces.
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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 const char * stroke_string
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= "stroke-width=\"0.1px\" fill=\"none\"";
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static void
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svg_line(
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const refframe_t * const ref,
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const v3_t p1,
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const v3_t p2
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)
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{
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// project p1 and p2 into the plane
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double x1, y1, x2, y2;
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v3_project(ref, p1, &x1, &y1);
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v3_project(ref, p2, &x2, &y2);
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const char * color = "#FF0000";
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printf("<line x1=\"%f\" y1=\"%f\" x2=\"%f\" y2=\"%f\" stroke=\"%s\" %s/>\n",
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x1, y1,
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x2, y2,
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color,
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stroke_string
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);
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}
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static void
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svg_circle(
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const double x,
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const double y,
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const double rad,
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const char * const color
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)
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{
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printf("<circle cx=\"%f\" cy=\"%f\" r=\"%f\" stroke=\"%s\" %s/>\n",
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x,
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y,
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rad,
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color,
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stroke_string
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);
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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 inset_distance = 8;
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const double hole_radius = 1.5;
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int * const face_used = calloc(sizeof(*face_used), stl->num_face);
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// for each vertex, find the coplanar triangles
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// \todo: do coplanar bits
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printf("<svg xmlns=\"http://www.w3.org/2000/svg\">\n");
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printf("<g transform=\"scale(3.543307)\"><!-- scale to mm -->\n");
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const stl_vertex_t ** const vertex_list = calloc(sizeof(*vertex_list), stl->num_vertex);
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for(int i = 0 ; i < stl->num_face ; i++)
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{
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if (face_used[i])
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continue;
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const stl_face_t * const f = &stl->face[i];
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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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0
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);
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fprintf(stderr, "%d: %d vertices\n", i, vertex_count);
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// generate a refernce frame based on this face
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refframe_t ref;
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refframe_init(&ref,
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f->vertex[0]->p,
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f->vertex[1]->p,
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f->vertex[2]->p
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);
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printf("<!-- face %d --><g>\n", i);
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// generate the polygon outline (should be one path?)
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for (int j = 0 ; j < vertex_count ; j++)
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svg_line(
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&ref,
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vertex_list[(j+0) % vertex_count]->p,
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vertex_list[(j+1) % vertex_count]->p
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);
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// generate the inset mounting holes
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for (int j = 0 ; j < vertex_count ; j++)
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{
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double x, y;
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refframe_inset(&ref, inset_distance, &x, &y,
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vertex_list[(j+0) % vertex_count]->p,
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vertex_list[(j+1) % vertex_count]->p,
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vertex_list[(j+2) % vertex_count]->p
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);
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svg_circle(x, y, hole_radius, "#00ff00");
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}
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printf("</g>\n");
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}
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printf("</g></svg>\n");
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return 0;
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}
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