From 446ce137c6823ba9eff273bdafdaf266287c7c98 Mon Sep 17 00:00:00 2001
From: Bryan Galdrikian <bgaldrikian@nvidia.com>
Date: Tue, 21 Feb 2017 12:07:59 -0800
Subject: first commit

---
 NvBlast/tools/common/ObjFileReader.cpp | 63 ++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 NvBlast/tools/common/ObjFileReader.cpp

(limited to 'NvBlast/tools/common/ObjFileReader.cpp')

diff --git a/NvBlast/tools/common/ObjFileReader.cpp b/NvBlast/tools/common/ObjFileReader.cpp
new file mode 100644
index 0000000..30b4c5c
--- /dev/null
+++ b/NvBlast/tools/common/ObjFileReader.cpp
@@ -0,0 +1,63 @@
+#include "ObjFileReader.h"
+
+#pragma warning(push)
+#pragma warning(disable:4706)
+#define TINYOBJLOADER_IMPLEMENTATION
+#include "tiny_obj_loader.h"
+#pragma warning(pop)
+
+
+#include <iostream>
+#include "PxVec3.h"
+#include "PxVec2.h"
+
+using physx::PxVec3;
+using physx::PxVec2;
+using Nv::Blast::Mesh;
+
+
+ObjFileReader::ObjFileReader()
+{
+	setConvertToUE4(false);
+}
+
+std::shared_ptr<Nv::Blast::Mesh> ObjFileReader::loadFromFile(std::string filename)
+{
+	std::vector<tinyobj::shape_t> shapes;
+	std::vector<tinyobj::material_t> mats;
+	std::string err;
+	std::string mtlPath;
+	bool ret = tinyobj::LoadObj(shapes, mats, err, filename.c_str());
+	// can't load?
+	if (!ret)
+		return nullptr;
+
+	if (shapes.size() > 1)
+	{
+		std::cout << "Can load only one object per mesh" << std::endl;
+	}
+
+	std::vector<PxVec3> positions;
+	std::vector<PxVec3> normals;
+	std::vector<PxVec2> uv;
+
+	auto& psVec = shapes[0].mesh.positions;
+	for (uint32_t i = 0; i < psVec.size() / 3; ++i)
+	{
+		positions.push_back(PxVec3(psVec[i * 3], psVec[i * 3 + 1], psVec[i * 3 + 2]));
+	}
+	auto& nmVec = shapes[0].mesh.normals;
+	for (uint32_t i = 0; i < nmVec.size() / 3; ++i)
+	{
+		normals.push_back(PxVec3(nmVec[i * 3], nmVec[i * 3 + 1], nmVec[i * 3 + 2]));
+	}
+	auto& txVec = shapes[0].mesh.texcoords;
+	for (uint32_t i = 0; i < txVec.size() / 2; ++i)
+	{
+		uv.push_back(PxVec2(txVec[i * 2], txVec[i * 2 + 1]));
+	}
+	PxVec3* nr = (!normals.empty()) ? normals.data() : 0;
+	PxVec2* uvp = (!uv.empty()) ? uv.data() : 0;
+
+	return std::make_shared<Mesh>(positions.data(), nr, uvp, static_cast<uint32_t>(positions.size()), shapes[0].mesh.indices.data(), static_cast<uint32_t>(shapes[0].mesh.indices.size()));
+}
-- 
cgit v1.2.3