From f3a34665978729ef65010ac2a4a9408e27d5bf3e Mon Sep 17 00:00:00 2001
From: ccolin
Date: Mon, 28 Dec 2020 17:36:45 +0100
Subject: skybox

---
 src/load_obj.cc | 68 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 src/load_obj.cc

(limited to 'src/load_obj.cc')

diff --git a/src/load_obj.cc b/src/load_obj.cc
new file mode 100644
index 0000000..2e079f0
--- /dev/null
+++ b/src/load_obj.cc
@@ -0,0 +1,68 @@
+#include "load_obj.hh"
+
+#define TINYOBJLOADER_IMPLEMENTATION
+#include "tiny_obj_loader.h"
+#include <QFile>
+#include <QDebug>
+
+
+QVector<GLfloat> load_obj(const char *path, int flags) {
+	QFile obj_file(path);
+	obj_file.open(QIODevice::ReadOnly | QIODevice::Text);
+	std::string obj = obj_file.readAll().toStdString();
+	tinyobj::ObjReaderConfig cfg;
+	cfg.triangulate = true;
+	cfg.vertex_color = false;
+	tinyobj::ObjReader reader;
+	if (!reader.ParseFromString(obj, "", cfg)) {
+		if (!reader.Error().empty()) {
+			qWarning() << "Erreur lors de la lecture de du modèle";
+		}
+		exit(1);
+	}
+	// if (!reader.Warning().empty()) {
+	// 	qWarning() << "TinyObjReader: " << reader.Warning();
+	// }
+	auto& attrib = reader.GetAttrib();
+	auto& shapes = reader.GetShapes();
+
+	QVector<GLfloat> verts;
+
+	for (size_t s = 0; s < shapes.size(); s++) {
+		// Loop over faces(polygon)
+		size_t index_offset = 0;
+		for (size_t f = 0; f < shapes[s].mesh.num_face_vertices.size(); f++) {
+			size_t fv = shapes[s].mesh.num_face_vertices[f];
+
+			// Loop over vertices in the face.
+			for (size_t v = 0; v < fv; v++) {
+				tinyobj::index_t idx = shapes[s].mesh.indices[index_offset + v];
+				tinyobj::real_t vx = attrib.vertices[3*idx.vertex_index+0];
+				tinyobj::real_t vy = attrib.vertices[3*idx.vertex_index+1];
+				tinyobj::real_t vz = attrib.vertices[3*idx.vertex_index+2];
+				verts.append(vx);
+				verts.append(vy);
+				verts.append(vz);
+
+				if (flags & LOAD_OBJ_NORMALS) {
+					tinyobj::real_t nx = attrib.normals[3*idx.normal_index+0];
+					tinyobj::real_t ny = attrib.normals[3*idx.normal_index+1];
+					tinyobj::real_t nz = attrib.normals[3*idx.normal_index+2];
+					verts.append(nx);
+					verts.append(ny);
+					verts.append(nz);
+				}
+
+				if (flags & LOAD_OBJ_UVS) {
+					tinyobj::real_t ts = attrib.texcoords[2*idx.texcoord_index+0];
+					tinyobj::real_t tt = attrib.texcoords[2*idx.texcoord_index+1];
+					verts.append(ts);
+					verts.append(tt);
+				}
+				// qDebug() << "vert" << vx << vy << vz << "tex" << ts << tt;
+			}
+			index_offset += fv;
+		}
+	}
+	return verts;
+}
-- 
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