+++ /dev/null
-#include <stdlib.h>
-#include <assimp/cimport.h>
-#include <assimp/postprocess.h>
-
-#include "asset.h"
-#include "logger.h"
-#include "tga.h"
-
-static const AiScene* importScene(const char* path);
-static Vector3D convertAiVector3D(AiVector3D vect);
-static const char* replaceFileExtension(const AiString path, const char* ext);
-
-
-
-const Asset3D* importAsset(const char* path) {
- const AiScene* scene = importScene(path);
- if (scene == NULL) {
- return NULL;
- }
-
- const unsigned int numMeshes = scene->mNumMeshes;
- const unsigned int numMaterials = scene->mNumMaterials;
-
- Asset3D* asset = malloc(sizeof(Asset3D));
- asset->numMeshes = numMeshes;
- asset->meshes = malloc(numMeshes * sizeof(Mesh));
- asset->numMaterials = numMaterials;
- asset->materials = malloc(numMaterials * sizeof(Material));
-
- for (unsigned int meshIndex = 0; meshIndex < numMeshes; ++meshIndex) {
- const AiMesh* aiMesh = scene->mMeshes[meshIndex];
- const unsigned int numVertices = aiMesh->mNumVertices;
- const unsigned int numFaces = aiMesh->mNumFaces;
-
- Mesh mesh = { .numVertices = numVertices,
- .vertices = malloc(numVertices * sizeof(Vector3D)),
- .normals = NULL,
- .textureCoords = NULL,
- .numFaces = numFaces,
- .faces = malloc(numFaces * sizeof(Face)),
- .materialIndex = aiMesh->mMaterialIndex };
-
- for (unsigned int vertIndex = 0; vertIndex < numVertices; ++vertIndex) {
- mesh.vertices[vertIndex] = convertAiVector3D(
- aiMesh->mVertices[vertIndex]);
- }
-
- if (aiMesh->mNormals != NULL) {
- mesh.normals = malloc(numVertices * sizeof(Vector3D));
- for (unsigned int normIndex = 0; normIndex < numVertices; ++normIndex) {
- mesh.normals[normIndex] = convertAiVector3D(
- aiMesh->mNormals[normIndex]);
- }
- }
-
- if (aiMesh->mTextureCoords != NULL) {
- mesh.textureCoords = malloc(numVertices * sizeof(Vector3D));
- for (unsigned int texcIndex = 0; texcIndex < numVertices; ++texcIndex) {
- mesh.textureCoords[texcIndex] = convertAiVector3D(
- aiMesh->mTextureCoords[0][texcIndex]);
- }
- }
-
- for (unsigned int faceIndex = 0; faceIndex < numFaces; ++faceIndex) {
- const AiFace aiFace = aiMesh->mFaces[faceIndex];
- const unsigned int numIndices = aiFace.mNumIndices;
-
- Face face = { .numIndices = numIndices,
- .indices = malloc(numIndices
- * sizeof(unsigned int)) };
-
- for (unsigned int i = 0; i < numIndices; ++i) {
- face.indices[i] = aiFace.mIndices[i];
- }
-
- mesh.faces[faceIndex] = face;
- }
-
- asset->meshes[meshIndex] = mesh;
- }
-
- GLuint* textureIds = malloc(numMaterials * sizeof(GLuint));
- glGenTextures(numMaterials, textureIds);
-
- for (unsigned int matIndex = 0; matIndex < numMaterials; ++matIndex) {
- Material material = { .textureId = textureIds[matIndex] };
-
- glBindTexture(GL_TEXTURE_2D, material.textureId);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-
- AiString originalTexturePath;
- if (aiGetMaterialTexture(scene->mMaterials[matIndex],
- aiTextureType_DIFFUSE,
- 0,
- &originalTexturePath,
- NULL, NULL, NULL, NULL, NULL, NULL) == AI_SUCCESS) {
- const char* textureFile = replaceFileExtension(originalTexturePath, ".tga");
- const size_t textureFileLength = strlen(textureFile);
- char* texturePath = malloc(strlen("assets/") + textureFileLength + 1);
- strcpy(texturePath, "assets/");
- strncat(texturePath, textureFile, textureFileLength);
-
- TgaImage* textureImage = readTga(texturePath);
- if (textureImage == NULL) {
- logError("Asset texture file not found: %s", texturePath);
- }
- else {
- glTexImage2D(GL_TEXTURE_2D,
- 0,
- textureImage->imageComponents,
- textureImage->header.imageWidth,
- textureImage->header.imageHeight,
- 0,
- textureImage->imageFormat,
- GL_UNSIGNED_BYTE,
- textureImage->bytes);
- free(textureImage->bytes);
- free(textureImage);
- }
- }
-
- asset->materials[matIndex] = material;
- }
- glBindTexture(GL_TEXTURE_2D, 0);
-
- aiReleaseImport(scene);
- return asset;
-}
-
-static const AiScene* importScene(const char* path) {
- const AiScene* scene = aiImportFile(path, aiProcess_PreTransformVertices);
- if (scene == NULL) {
- logError("Failed to import asset from %s", path);
- }
- else if ((scene->mFlags & AI_SCENE_FLAGS_INCOMPLETE) == AI_SCENE_FLAGS_INCOMPLETE) {
- logError("Incomplete scene imported from %s", path);
- aiReleaseImport(scene);
- scene = NULL;
- }
- return scene;
-}
-
-static Vector3D convertAiVector3D(AiVector3D vect) {
- return (Vector3D) { .x = vect.x,
- .y = vect.y,
- .z = vect.z };
-}
-
-/** BUGS
- * The following function will not work properly with texture
- * file names (excluding directory part) beginning with '.'
- */
-static const char* replaceFileExtension(const AiString path, const char* ext) {
- size_t lengthToCopy = path.length;
-
- char* lastDotSubstr = strrchr(path.data, '.');
- if (lastDotSubstr != NULL) {
- if (strpbrk(lastDotSubstr, "\\/") == NULL) {
- lengthToCopy = lastDotSubstr - path.data;
- }
- }
-
- size_t extLength = strlen(ext) + 1;
- char* newPath = malloc(lengthToCopy + extLength);
- strncpy(newPath, path.data, lengthToCopy);
- strncpy(newPath + lengthToCopy, ext, extLength);
-
- return newPath;
-}
projects / shadowclad.git / blobdiff