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REDESIGNED: ExportMesh() to use memory buffer #1232

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This change could introduce an issue on dataSize precalculation...
This commit is contained in:
raysan5 2020-05-23 19:48:40 +02:00
parent 4e8e90b6df
commit 394bf00ba5
1 changed files with 36 additions and 30 deletions
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66
src/models.c
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@ -43,11 +43,10 @@
#include "config.h" // Defines module configuration flags
#endif
#include "utils.h" // Required for: fopen() Android mapping
#include "utils.h" // Required for: LoadFileData(), LoadFileText(), SaveFileText()
#include <stdlib.h> // Required for: malloc(), free()
#include <stdio.h> // Required for: FILE, fopen(), fclose()
#include <string.h> // Required for: strncmp() [Used in LoadModelAnimations()], strlen() [Used in LoadTextureFromCgltfImage()]
#include <string.h> // Required for: memcmp(), strlen()
#include <math.h> // Required for: sinf(), cosf(), sqrtf(), fabsf()
#if defined(_WIN32)
@ -825,57 +824,64 @@ void UnloadMesh(Mesh mesh)
// Export mesh data to file
void ExportMesh(Mesh mesh, const char *fileName)
{
bool success = false;
if (IsFileExtension(fileName, ".obj"))
{
FILE *objFile = fopen(fileName, "wt");
// Estimated data size, it should be enough...
int dataSize = mesh.vertexCount/3*strlen("v 0000.00f 0000.00f 0000.00f") +
mesh.vertexCount/2*strlen("vt 0.000f 0.00f") +
mesh.vertexCount/3*strlen("vn 0.000f 0.00f 0.00f") +
mesh.triangleCount/3*strlen("f 00000/00000/00000 00000/00000/00000 00000/00000/00000");
fprintf(objFile, "# //////////////////////////////////////////////////////////////////////////////////\n");
fprintf(objFile, "# // //\n");
fprintf(objFile, "# // rMeshOBJ exporter v1.0 - Mesh exported as triangle faces and not optimized //\n");
fprintf(objFile, "# // //\n");
fprintf(objFile, "# // more info and bugs-report: github.com/raysan5/raylib //\n");
fprintf(objFile, "# // feedback and support: ray[at]raylib.com //\n");
fprintf(objFile, "# // //\n");
fprintf(objFile, "# // Copyright (c) 2018 Ramon Santamaria (@raysan5) //\n");
fprintf(objFile, "# // //\n");
fprintf(objFile, "# //////////////////////////////////////////////////////////////////////////////////\n\n");
fprintf(objFile, "# Vertex Count: %i\n", mesh.vertexCount);
fprintf(objFile, "# Triangle Count: %i\n\n", mesh.triangleCount);
// NOTE: Text data buffer size is estimated considering mesh data size
char *txtData = (char *)RL_CALLOC(dataSize + 2000, sizeof(char));
fprintf(objFile, "g mesh\n");
int bytesCount = 0;
bytesCount += sprintf(txtData + bytesCount, "# //////////////////////////////////////////////////////////////////////////////////\n");
bytesCount += sprintf(txtData + bytesCount, "# // //\n");
bytesCount += sprintf(txtData + bytesCount, "# // rMeshOBJ exporter v1.0 - Mesh exported as triangle faces and not optimized //\n");
bytesCount += sprintf(txtData + bytesCount, "# // //\n");
bytesCount += sprintf(txtData + bytesCount, "# // more info and bugs-report: github.com/raysan5/raylib //\n");
bytesCount += sprintf(txtData + bytesCount, "# // feedback and support: ray[at]raylib.com //\n");
bytesCount += sprintf(txtData + bytesCount, "# // //\n");
bytesCount += sprintf(txtData + bytesCount, "# // Copyright (c) 2018 Ramon Santamaria (@raysan5) //\n");
bytesCount += sprintf(txtData + bytesCount, "# // //\n");
bytesCount += sprintf(txtData + bytesCount, "# //////////////////////////////////////////////////////////////////////////////////\n\n");
bytesCount += sprintf(txtData + bytesCount, "# Vertex Count: %i\n", mesh.vertexCount);
bytesCount += sprintf(txtData + bytesCount, "# Triangle Count: %i\n\n", mesh.triangleCount);
bytesCount += sprintf(txtData + bytesCount, "g mesh\n");
for (int i = 0, v = 0; i < mesh.vertexCount; i++, v += 3)
{
fprintf(objFile, "v %.2f %.2f %.2f\n", mesh.vertices[v], mesh.vertices[v + 1], mesh.vertices[v + 2]);
bytesCount += sprintf(txtData + bytesCount, "v %.2f %.2f %.2f\n", mesh.vertices[v], mesh.vertices[v + 1], mesh.vertices[v + 2]);
}
for (int i = 0, v = 0; i < mesh.vertexCount; i++, v += 2)
{
fprintf(objFile, "vt %.2f %.2f\n", mesh.texcoords[v], mesh.texcoords[v + 1]);
bytesCount += sprintf(txtData + bytesCount, "vt %.3f %.3f\n", mesh.texcoords[v], mesh.texcoords[v + 1]);
}
for (int i = 0, v = 0; i < mesh.vertexCount; i++, v += 3)
{
fprintf(objFile, "vn %.2f %.2f %.2f\n", mesh.normals[v], mesh.normals[v + 1], mesh.normals[v + 2]);
bytesCount += sprintf(txtData + bytesCount, "vn %.3f %.3f %.3f\n", mesh.normals[v], mesh.normals[v + 1], mesh.normals[v + 2]);
}
for (int i = 0; i < mesh.triangleCount; i += 3)
{
fprintf(objFile, "f %i/%i/%i %i/%i/%i %i/%i/%i\n", i, i, i, i + 1, i + 1, i + 1, i + 2, i + 2, i + 2);
bytesCount += sprintf(txtData + bytesCount, "f %i/%i/%i %i/%i/%i %i/%i/%i\n", i, i, i, i + 1, i + 1, i + 1, i + 2, i + 2, i + 2);
}
fprintf(objFile, "\n");
bytesCount += sprintf(txtData + bytesCount, "\n");
fclose(objFile);
// NOTE: Text data length exported is determined by '\0' (NULL) character
SaveFileText(fileName, txtData);
success = true;
RL_FREE(txtData);
}
else if (IsFileExtension(fileName, ".raw"))
{
// TODO: Support additional file formats to export mesh vertex data
}
else if (IsFileExtension(fileName, ".raw")) { } // TODO: Support additional file formats to export mesh vertex data
if (success) TRACELOG(LOG_INFO, "FILEIO: [%s] Mesh exported successfully", fileName);
else TRACELOG(LOG_WARNING, "FILEIO: [%s] Failed to export mesh data", fileName);
}
// Load materials from model file