Voidwalker Model Loader

Krythic

Mar 5th, 2023

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using SharpDX;
using SharpDX.Direct3D11;
using System;
using System.Collections.Generic;
using System.IO;
namespace VoidwalkerEngine.Framework.DirectX.Rendering
{
public class WavefrontModel
{
public string Name { get; set; }
public List<Vertex> Vertices { get; set; }
public WavefrontModel()
{
this.Vertices = new List<Vertex>();
}
public static WavefrontModel Load(string filePath)
{
if (File.Exists(filePath))
{
return Load(File.ReadAllBytes(filePath));
}
else
{
throw new FileNotFoundException("Could not locate: " + filePath);
}
}
public static WavefrontModel Load(byte[] bytes)
{
using (MemoryStream memoryStream = new MemoryStream(bytes))
{
using (StreamReader reader = new StreamReader(memoryStream))
{
WavefrontModel model = new WavefrontModel();
List<Vector3> parsedVertices = new List<Vector3>();
List<Vector2> parsedTexCoords = new List<Vector2>();
List<Vector3> parsedNormals = new List<Vector3>();
string line;
while ((line = reader.ReadLine()) != null)
{
if (line.Length > 0)
{
string[] segments = line.Split(' ');
if (line.StartsWith("o "))
{
Console.WriteLine(line);
}
if (line.StartsWith("v "))
{
/**
* Fix Precision Errors
*/
string xComponent = segments[1];
string yComponent = segments[2];
string zComponent = segments[3];
if (xComponent.StartsWith("-0.00") || xComponent.StartsWith("0.00"))
{
xComponent = "0";
}
if (yComponent.StartsWith("-0.00") || yComponent.StartsWith("0.00"))
{
yComponent = "0";
}
if (zComponent.StartsWith("-0.00") || zComponent.StartsWith("0.00"))
{
zComponent = "0";
}
Vector3 location = new Vector3(
float.Parse(xComponent),
float.Parse(yComponent),
float.Parse(zComponent));
parsedVertices.Add(location);
}
else if (line.StartsWith("vt "))
{
parsedTexCoords.Add(
new Vector2(
Single.Parse(segments[1]),
1 - Single.Parse(segments[2])));
}
else if (line.StartsWith("vn "))
{
parsedNormals.Add(
new Vector3(
Single.Parse(segments[1]),
Single.Parse(segments[2]),
Single.Parse(segments[3])));
}
else if (line.StartsWith("f "))
{
for (int i = 1; i <= 3; i++)
{
string[] faceSegments = segments[i].Split('/');
int verticeIndex = Int32.Parse(faceSegments[0]) - 1;
int texCoordIndex = Int32.Parse(faceSegments[1]) - 1;
int normalIndex = Int32.Parse(faceSegments[2]) - 1;
Vertex vertex = new Vertex
{
Location = parsedVertices[verticeIndex],
TexCoords = parsedTexCoords[texCoordIndex],
Normal = parsedNormals[normalIndex]
};
model.Vertices.Add(vertex);
}
}
}
}
reader.Close();
return model;
}
}
}
public GraphicsMesh ToModelMesh(Device device)
{
return new GraphicsMesh(device, this.Vertices.ToArray());
}
}
}

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