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C99 shared library build and API example. #80
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| /* | ||
| MIT License | ||
| Copyright (c) 2018-2020 Jonathan Young | ||
| Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| of this software and associated documentation files (the "Software"), to deal | ||
| in the Software without restriction, including without limitation the rights | ||
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| copies of the Software, and to permit persons to whom the Software is | ||
| furnished to do so, subject to the following conditions: | ||
| The above copyright notice and this permission notice shall be included in all | ||
| copies or substantial portions of the Software. | ||
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| SOFTWARE. | ||
| */ | ||
| /* | ||
| example | ||
| This example shows how to use the xatlas API to generate a unique set of texture coordinates. | ||
| Input: an .obj model file. | ||
| Output: | ||
| * an .obj model file (example_output.obj). This is simplistic for example purposes, it doesn't copy materials from the input .obj file. | ||
| * texture coordinates rasterized to images, colored by chart (example_charts*.tga) and by triangle (example_tris*.tga). | ||
| */ | ||
| #include <assert.h> | ||
| #include <stdarg.h> | ||
| #include <stdlib.h> | ||
| #include <stdio.h> | ||
| #include <string.h> | ||
| #include <time.h> | ||
| #include "../xatlas_c.h" | ||
| #include "objzero/objzero.h" | ||
|
|
||
| #ifdef _MSC_VER | ||
| #define STRICMP _stricmp | ||
| #include <windows.h> | ||
| static CRITICAL_SECTION s_progressMutex; | ||
| #else | ||
| #include <strings.h> | ||
| #define STRICMP strcasecmp | ||
| #endif | ||
|
|
||
| static bool s_verbose = false; | ||
|
|
||
| static int Print(const char *format, ...) | ||
| { | ||
| va_list arg; | ||
| va_start(arg, format); | ||
| printf("\r"); // Clear progress text. | ||
| const int result = vprintf(format, arg); | ||
| va_end(arg); | ||
| return result; | ||
| } | ||
|
|
||
| // May be called from any thread. | ||
| static bool ProgressCallback(xatlasProgressCategory category, int progress, void *userData) | ||
| { | ||
| (void)userData; | ||
| // Don't interupt verbose printing. | ||
| if (s_verbose) | ||
| return true; | ||
| #ifdef _MSC_VER | ||
| EnterCriticalSection(&s_progressMutex); | ||
| #endif | ||
| printf("\r %s [", xatlasProgressCategoryString(category)); | ||
| for (int i = 0; i < 10; i++) | ||
| printf(progress / ((i + 1) * 10) ? "*" : " "); | ||
| printf("] %d%%", progress); | ||
| fflush(stdout); | ||
| if (progress == 100) | ||
| printf("\n"); | ||
| #ifdef _MSC_VER | ||
| LeaveCriticalSection(&s_progressMutex); | ||
| #endif | ||
| return true; | ||
| } | ||
|
|
||
| int main(int argc, char *argv[]) | ||
| { | ||
| #ifdef _MSC_VER | ||
| InitializeCriticalSection(&s_progressMutex); | ||
| #endif | ||
| if (argc < 2) { | ||
| printf("Usage: %s input_file.obj [options]\n", argv[0]); | ||
| printf(" Options:\n"); | ||
| printf(" -verbose\n"); | ||
| return 1; | ||
| } | ||
| s_verbose = (argc >= 3 && STRICMP(argv[2], "-verbose") == 0); | ||
| // Load object file. | ||
| printf("Loading '%s'...\n", argv[1]); | ||
| objz_setIndexFormat(OBJZ_INDEX_FORMAT_U32); | ||
| objzModel *model = objz_load(argv[1]); | ||
| if (!model) { | ||
| printf("%s\n", objz_getError()); | ||
| return EXIT_FAILURE; | ||
| } | ||
| if (objz_getError()) // Print warnings. | ||
| printf("%s\n", objz_getError()); | ||
| // Create empty atlas. | ||
| xatlasSetPrint(Print, s_verbose); | ||
| xatlasAtlas *atlas = xatlasCreate(); | ||
| // Set progress callback. | ||
| xatlasSetProgressCallback(atlas, ProgressCallback, NULL); | ||
| // Add mesh to atlas. | ||
| const uint32_t vertexStride = (uint32_t)(sizeof(float) * 8); | ||
| xatlasMeshDecl meshDecl; | ||
| xatlasMeshDeclInit(&meshDecl); | ||
| meshDecl.vertexCount = model->numVertices; | ||
| meshDecl.vertexPositionData = model->vertices; | ||
| meshDecl.vertexPositionStride = vertexStride; | ||
| if (model->flags & OBJZ_FLAG_NORMALS) { | ||
| meshDecl.vertexNormalData = (float *)model->vertices + 5; | ||
| meshDecl.vertexNormalStride = vertexStride; | ||
| } | ||
| if (model->flags & OBJZ_FLAG_TEXCOORDS) { | ||
| meshDecl.vertexUvData = (float *)model->vertices + 3; | ||
| meshDecl.vertexUvStride = vertexStride; | ||
| } | ||
| meshDecl.indexCount = model->numIndices; | ||
| meshDecl.indexData = model->indices; | ||
| meshDecl.indexFormat = XATLAS_INDEX_FORMAT_UINT32; | ||
| xatlasAddMeshError error = xatlasAddMesh(atlas, &meshDecl, 1); | ||
| if (error != XATLAS_ADD_MESH_ERROR_SUCCESS) { | ||
| xatlasDestroy(atlas); | ||
| printf("\rError adding mesh: %s\n", xatlasAddMeshErrorString(error)); | ||
| return EXIT_FAILURE; | ||
| } | ||
| xatlasAddMeshJoin(atlas); // Not necessary. Only called here so geometry totals are printed after the AddMesh progress indicator. | ||
| printf(" %u total vertices\n", meshDecl.vertexCount); | ||
| printf(" %u total faces\n", meshDecl.indexCount / 3); | ||
| // Generate atlas. | ||
| printf("Generating atlas\n"); | ||
| xatlasGenerate(atlas, NULL, NULL); | ||
| printf(" %d charts\n", atlas->chartCount); | ||
| printf(" %d atlases\n", atlas->atlasCount); | ||
| for (uint32_t i = 0; i < atlas->atlasCount; i++) | ||
| printf(" %d: %0.2f%% utilization\n", i, atlas->utilization[i] * 100.0f); | ||
| printf(" %ux%u resolution\n", atlas->width, atlas->height); | ||
| printf(" %u total vertices\n", atlas->meshes[0].vertexCount); | ||
| // Cleanup. | ||
| xatlasDestroy(atlas); | ||
| objz_destroy(model); | ||
| printf("Done\n"); | ||
| return EXIT_SUCCESS; | ||
| } |
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