106 lines
4.1 KiB
C#
106 lines
4.1 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text;
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using System.IO;
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using OpenTK;
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namespace Switch_Toolbox.Library
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{
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public class OBJ
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{
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public static void ExportModel(string FileName, STGenericModel Model, List<STGenericTexture> Textures)
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{
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string fileNoExt = Path.GetFileNameWithoutExtension(FileName);
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string fileMtlPath = FileName.Replace("obj", "mtl");
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//Write model
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StringBuilder writer = new StringBuilder();
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SaveMeshes(writer, Model, $"{fileNoExt}.mtl");
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File.WriteAllText(FileName, writer.ToString());
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//Write materials
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StringBuilder writerMtl = new StringBuilder();
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SaveMaterials(writerMtl, Model);
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File.WriteAllText(fileMtlPath, writerMtl.ToString());
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}
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private static void SaveMeshes(StringBuilder writer, STGenericModel Model, string MtlName)
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{
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writer.AppendLine($"mtllib {MtlName}");
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int VertexCount = 1;
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foreach (STGenericObject mesh in Model.Nodes[0].Nodes)
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{
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writer.AppendLine($"o {mesh.Text}");
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writer.AppendLine($"g {mesh.Text}");
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foreach (var v in mesh.vertices)
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{
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writer.AppendLine($"v {v.pos.X} {v.pos.Y} {v.pos.Z}");
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writer.AppendLine($"vn {v.nrm.X} {v.nrm.Y} {v.nrm.Z}");
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writer.AppendLine($"vt {v.uv0.X} {v.uv0.Y}");
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}
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var mat = GetMaterial(mesh.MaterialIndex, Model);
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if (mat != null)
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writer.AppendLine($"usemtl {mat.Text}");
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for (int i = 0; i < mesh.faces.Count; i++)
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{
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int[] indices = new int[3]
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{
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mesh.faces[i++],
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mesh.faces[i++],
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mesh.faces[i]
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};
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writer.AppendLine($"f {indices[0] + VertexCount}/{indices[0] + VertexCount}/{indices[0] + VertexCount}" +
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$" {indices[1] + VertexCount}/{indices[1] + VertexCount}/{indices[1] + VertexCount}" +
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$" {indices[2] + VertexCount}/{indices[2] + VertexCount}/{indices[2] + VertexCount}");
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}
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VertexCount += mesh.vertices.Count;
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}
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}
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private static STGenericMaterial GetMaterial(int MaterialIndex, STGenericModel Model)
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{
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if (MaterialIndex < Model.Nodes[1].Nodes.Count)
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return (STGenericMaterial)Model.Nodes[1].Nodes[MaterialIndex];
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else
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return null;
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}
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public static float Ns = -3.921569f;
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public static Vector3 Ka = new Vector3(1.000000f, 1.000000f, 1.000000f);
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public static Vector3 Kd = new Vector3(0.640000f, 0.640000f, 0.640000f);
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public static Vector3 Ks = new Vector3(0.500000f, 0.500000f, 0.500000f);
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public static Vector3 Ke = new Vector3(0.000000f, 0.000000f, 0.000000f);
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public static float Ni = -1f;
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public static float d = -1f;
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public static float illum = 2;
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private static void SaveMaterials(StringBuilder writer, STGenericModel Model)
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{
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foreach (STGenericMaterial mat in Model.Nodes[1].Nodes)
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{
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writer.AppendLine($"newmtl {mat.Text}");
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writer.AppendLine($"Ns {Ns}");
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writer.AppendLine($"Ka {Ka.X} {Ka.Y} {Ka.Z}");
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writer.AppendLine($"Kd {Kd.X} {Kd.Y} {Kd.Z}");
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writer.AppendLine($"Ks {Ks.X} {Ks.Y} {Ks.Z}");
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writer.AppendLine($"Ke {Ke.X} {Ke.Y} {Ke.Z}");
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writer.AppendLine($"Ni {Ni}");
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writer.AppendLine($"d {d}");
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writer.AppendLine($"illum {illum}");
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foreach (var tex in mat.TextureMaps)
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{
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if (tex.Type == STGenericMatTexture.TextureType.Diffuse)
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writer.AppendLine($"map_Kd {tex.Name}.png");
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}
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}
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}
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}
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}
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