68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
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/* -----------------------------------------------------------------------------
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*
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* Example: write a STL file
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*
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* Just give the filepath and an initialized gmio_stl_mesh object to
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* gmio_stl_write_file().
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* The gmio_stl_mesh object defines the interface to access the underlying user
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* mesh.
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*
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* Note if you want to have control over the stream to be used, call
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* gmio_stl_write() instead.
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*
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* -------------------------------------------------------------------------- */
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#include <gmio_core/error.h>
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#include <gmio_stl/stl_io.h>
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#include <stdio.h>
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#include "3d_mesh.h"
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/* Callback invoked sequentially for each triangle in the STL mesh
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* Just transfer the triangle of index 'tri_id' into 'triangle' */
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static void my_3d_mesh__get_triangle(
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const void* cookie, uint32_t tri_id, struct gmio_stl_triangle* triangle)
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{
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const struct my_3d_mesh* my_mesh = (const struct my_3d_mesh*)cookie;
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const struct my_3d_triangle* my_tri = &my_mesh->triangle_array[tri_id];
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struct gmio_stl_coords* tri_vertices = &triangle->v1;
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for (int i = 0; i < 3; ++i) {
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tri_vertices[i].x = my_tri[i][0];
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tri_vertices[i].y = my_tri[i][1];
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tri_vertices[i].z = my_tri[i][2];
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}
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gmio_stl_triangle_compute_normal(triangle);
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}
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int main(int argc, char** argv)
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{
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int error = 0;
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if (argc > 1) {
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/* Path to the STL file */
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const char* filepath = argv[1];
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/* User-defined mesh object */
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struct my_3d_mesh my_mesh = {0};
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/* The interface to the user-defined mesh object */
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struct gmio_stl_mesh mesh = {0};
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/* Construct the user mesh */
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/* ... */
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/* Initialize the mesh interface */
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/* -- Cookie object passed to callbacks of gmio_stl_mesh */
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mesh.cookie = &my_mesh;
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/* -- Count of triangles in the mesh */
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mesh.triangle_count = my_mesh.facet_count;
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/* -- Pointer on a function that retrieves a triangle from the mesh */
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mesh.func_get_triangle = &my_3d_mesh__get_triangle;
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/* Write binary STL little-endian, using default options(NULL) */
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error = gmio_stl_write_file(
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GMIO_STL_FORMAT_BINARY_LE, filepath, &mesh, NULL);
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if (error != GMIO_ERROR_OK)
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fprintf(stderr, "gmio error: 0x%X\n", error);
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free(my_mesh.triangle_array);
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}
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return 0;
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}
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