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mtl support

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This commit is contained in:
Nishi 2026-01-18 23:42:29 +09:00
commit 76bbf980eb
Signed by: nishi
GPG key ID: 27EF69B208EB9343
9 changed files with 194 additions and 54 deletions
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113
engine/src/model.c
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@ -5,6 +5,7 @@
#include <GearSrc/File.h>
#include <GearSrc/Log.h>
#include <GearSrc/Math.h>
#include <GearSrc/String.h>
#include <stb_ds.h>
@ -25,13 +26,18 @@ static void parse_obj(GSModel model, char* txt) {
if(strlen(f) > 0 && f[0] != '#') {
char* arg;
if(f[strlen(f) - 1] == '\n') f[strlen(f) - 1] = 0;
if(f[strlen(f) - 1] == '\r') f[strlen(f) - 1] = 0;
if((arg = strchr(f, ' ')) != NULL) {
arg[0] = 0;
arg++;
if(strcmp(f, "v") == 0) {
if(strcmp(f, "usemtl") == 0) {
int k = arrlen(model->face);
char* v = GSStringDuplicate(arg);
hmput(model->usemtl, k, v);
} else if(strcmp(f, "v") == 0) {
float v0, v1, v2;
sscanf(arg, "%f %f %f", &v0, &v1, &v2);
@ -154,12 +160,54 @@ static void parse_obj(GSModel model, char* txt) {
}
}
static void parse_mtl(GSModel model, char* txt) {
char* f = txt;
char* m = NULL;
while(1) {
char* s = strchr(f, '\n');
if(s != NULL) s[0] = 0;
if(strlen(f) > 0 && f[0] != '#') {
char* arg;
if(f[strlen(f) - 1] == '\r') f[strlen(f) - 1] = 0;
if((arg = strchr(f, ' ')) != NULL) {
arg[0] = 0;
arg++;
if(strcmp(f, "newmtl") == 0) {
GLuint v = 0;
shput(model->material, arg, v);
if(m != NULL) free(m);
m = GSStringDuplicate(arg);
} else if(strcmp(f, "map_Kd") == 0 && m != NULL) {
GLuint t = 0;
char* p = GSStringConcat("model-ws:/", arg);
if(GSGLTextureTry(model->engine->client->gl, &t, NULL, NULL, p)) {
shput(model->material, m, t);
}
}
}
}
if(s == NULL) break;
f = s + 1;
}
if(m != NULL) free(m);
}
GSModel GSModelOpen(GSEngine engine, const char* path) {
GSModel model = malloc(sizeof(*model));
GSFile f;
char* buffer;
unsigned int size;
int w, h;
GSGL gl = NULL;
if(engine->client != NULL) gl = engine->client->gl;
@ -173,6 +221,22 @@ GSModel GSModelOpen(GSEngine engine, const char* path) {
return NULL;
}
model->material = NULL;
sh_new_strdup(model->material);
model->usemtl = NULL;
if(gl != NULL) {
GLuint t = 0;
GSGLTextureTry(gl, &t, NULL, NULL, "model-ws:/model");
if(t != 0) {
char* k = "default";
shput(model->material, k, t);
}
}
if((f = GSFileOpen(engine, "model-ws:/model.obj")) == NULL) {
GSEngineUnregisterResource(engine, "model-ws");
@ -180,14 +244,6 @@ GSModel GSModelOpen(GSEngine engine, const char* path) {
return NULL;
}
if(gl != NULL) {
if(GSGLTextureLoadFile(gl, &model->texture, &w, &h, "model-ws:/model.png")) {
} else if(GSGLTextureLoadFile(gl, &model->texture, &w, &h, "model-ws:/model.bmp")) {
} else if(GSGLTextureLoadFile(gl, &model->texture, &w, &h, "model-ws:/model.jpg")) {
} else if(GSGLTextureLoadFile(gl, &model->texture, &w, &h, "model-ws:/model.jpeg")) {
}
}
size = GSFileSize(f);
buffer = malloc(size + 1);
buffer[size] = 0;
@ -199,6 +255,19 @@ GSModel GSModelOpen(GSEngine engine, const char* path) {
free(buffer);
if(gl != NULL && (f = GSFileOpen(engine, "model-ws:/model.mtl")) != NULL) {
size = GSFileSize(f);
buffer = malloc(size + 1);
buffer[size] = 0;
GSFileRead(f, buffer, size);
GSFileClose(f);
parse_mtl(model, buffer);
free(buffer);
}
GSEngineUnregisterResource(engine, "model-ws");
GSLog(GSLogInfo, "Opened model %s, %d vertexes, %d faces", path, arrlen(model->vertex), arrlen(model->face));
@ -225,9 +294,17 @@ void GSModelDraw(GSModel model, GSVector3 pos, GSVector3 rot) {
GSGLSetPosition(gl, pos, rot);
if(model->call_list == 0) {
GSGLTextureSet(gl, model->texture);
char* k = "default";
GSGLTextureSet(gl, shget(model->material, k));
for(i = 0; i < arrlen(model->face); i++) {
int ind = hmgeti(model->usemtl, i);
if(ind != -1) {
GSGLTextureSet(gl, shget(model->material, model->usemtl[ind].value));
}
GSGLPolygon(gl, model->face[i].count, model->face[i].vertex, model->face[i].texcoord, model->face[i].normal);
}
@ -247,10 +324,18 @@ void GSModelClose(GSModel model) {
}
arrfree(model->face);
for(i = 0; i < shlen(model->material); i++) {
GSGLTextureDelete(model->engine->client->gl, model->material[i].value);
}
shfree(model->material);
for(i = 0; i < hmlen(model->usemtl); i++) {
free(model->usemtl[i].value);
}
hmfree(model->usemtl);
arrfree(model->vertex);
arrfree(model->texcoord);
if(model->texture != 0) GSGLTextureDelete(model->engine->client->gl, model->texture);
free(model);
}