public Material loadMaterial(string materialFileName)
{
StreamReader sourceFile = null;
try
{
sourceFile = new StreamReader(materialFileName);
}
catch (Exception streamException)
{
Logger.LogError(Logger.ErrorState.Limited, "Failed to load material from file " + materialFileName + " Error:" + streamException.Message);
return(null);
}
Logger.LogInfoLinePart("Loading material from file ", ConsoleColor.Gray);
Logger.LogInfoLinePart(materialFileName, ConsoleColor.Cyan);
Logger.LogInfoLineEnd();
string line = null;
string materialName = null;
Material newMaterial = null;
char[] space = { ' ' };
// First check if we already have this material
do
{
line = sourceFile.ReadLine();
if (line == null)
{
break;
}
else if (line.Contains("newmtl"))
{
materialName = line.Split(space)[1];
break;
}
}while (line != null);
if (doesMaterialExist(materialName))
{
sourceFile.Close();
return(GetMaterialByName(materialName));
}
else
{
newMaterial = new Material(materialName);
}
// Different texture maps can have different options, change this struct
// as we go
LoadOptions options = new LoadOptions(false, false, false);
// Read rest of the file
// use . as separator instead of system default
System.Globalization.NumberFormatInfo nfi = new System.Globalization.CultureInfo("en-US", false).NumberFormat;
bool isCubemap = false;
List <string> cubemapNames = null;
do
{
line = sourceFile.ReadLine();
if (line == null)
{
break;
}
if (line.Contains("#"))
{
// comment
}
else if (line.Contains("cubemap"))
{
// This is a cubemap
isCubemap = true;
cubemapNames = new List <string>(6);
for (int i = 0; i < 6; i++)
{
cubemapNames.Add("");
}
}
else if (line.Contains("mipmaps"))
{
// Mipmap option
// mipmaps: true
string optionValue = line.Split(space)[1];
options.mipmaps = (optionValue == "true");
}
else if (line.Contains("repeat"))
{
// Repeat option
// repeat: true
string optionValue = line.Split(space)[1];
options.repeat = (optionValue == "true");
}
else if (line.Contains("interpolate"))
{
// Interpolation option
// interpolate: true
string optionValue = line.Split(space)[1];
options.interpolation = (optionValue == "true");
}
if (isCubemap)
{
// Look for cubemap map identifiers
if (line.Contains("map_top"))
{
cubemapNames[posY] = line.Split(space)[1];
}
else if (line.Contains("map_bottom"))
{
cubemapNames[negY] = line.Split(space)[1];
}
else if (line.Contains("map_left"))
{
cubemapNames[negX] = line.Split(space)[1];
}
else if (line.Contains("map_right"))
{
cubemapNames[posX] = line.Split(space)[1];
}
else if (line.Contains("map_front"))
{
cubemapNames[posZ] = line.Split(space)[1];
}
else if (line.Contains("map_back"))
{
cubemapNames[negZ] = line.Split(space)[1];
}
}
else
{
if (line.Contains("map_Kd"))
{
// Diffuse map
// map_Kd filename.png
string textureName = line.Split(space)[1];
int textureGLIndex = loadTexture(textureName, options);
TextureMap diffuse = new TextureMap(textureName, textureGLIndex);
newMaterial.textureMaps.Add(ShaderUniformName.DiffuseMap, diffuse);
Logger.LogInfoLinePart(" Diffuse map :", ConsoleColor.Gray);
Logger.LogInfoLinePart(textureName, ConsoleColor.Cyan);
Logger.LogInfoLineEnd();
}
else if (line.Contains("map_Ki"))
{
// Illumination map
// map_Ki filename_i.png
string textureName = line.Split(space)[1];
int textureGLIndex = loadTexture(textureName, options);
TextureMap illumination = new TextureMap(textureName, textureGLIndex);
newMaterial.textureMaps.Add(ShaderUniformName.IlluminationMap, illumination);
Logger.LogInfoLinePart(" Illumination map :", ConsoleColor.Gray);
Logger.LogInfoLinePart(textureName, ConsoleColor.Cyan);
Logger.LogInfoLineEnd();
}
else if (line.Contains("map_Kn"))
{
// Normal map
// map_Kn filename_n.png
string textureName = line.Split(space)[1];
int textureGLIndex = loadTexture(textureName, options);
TextureMap normal = new TextureMap(textureName, textureGLIndex);
newMaterial.textureMaps.Add(ShaderUniformName.NormalMap, normal);
Logger.LogInfoLinePart(" Normal map :", ConsoleColor.Gray);
Logger.LogInfoLinePart(textureName, ConsoleColor.Cyan);
Logger.LogInfoLineEnd();
}
else if (line.Contains("map_Kr"))
{
// Roughness map
// map_Kr filename_r.png
string textureName = line.Split(space)[1];
int textureGLIndex = loadTexture(textureName, options);
TextureMap roughness = new TextureMap(textureName, textureGLIndex);
newMaterial.textureMaps.Add(ShaderUniformName.RoughnessMap, roughness);
Logger.LogInfoLinePart(" Roughness map :", ConsoleColor.Gray);
Logger.LogInfoLinePart(textureName, ConsoleColor.Cyan);
Logger.LogInfoLineEnd();
}
else if (line.Contains("map_Km"))
{
// Metallic map
// map_Km filename_m.png
string textureName = line.Split(space)[1];
int textureGLIndex = loadTexture(textureName, options);
TextureMap metallic = new TextureMap(textureName, textureGLIndex);
newMaterial.textureMaps.Add(ShaderUniformName.MetallicMap, metallic);
Logger.LogInfoLinePart(" Metallic map :", ConsoleColor.Gray);
Logger.LogInfoLinePart(textureName, ConsoleColor.Cyan);
Logger.LogInfoLineEnd();
}
else if (line.Contains("map_Kh"))
{
// Height map
// map_Kh filename_h.png
string textureName = line.Split(space)[1];
int textureGLIndex = loadTexture(textureName, options);
TextureMap height = new TextureMap(textureName, textureGLIndex);
newMaterial.textureMaps.Add(ShaderUniformName.HeightMap, height);
Logger.LogInfoLinePart(" Height map :", ConsoleColor.Gray);
Logger.LogInfoLinePart(textureName, ConsoleColor.Cyan);
Logger.LogInfoLineEnd();
}
}
} while (line != null);
if (isCubemap)
{
int cubeIndex = LoadCubeMap(cubemapNames, options);
TextureMap cube = new TextureMap(newMaterial.materialName, cubeIndex);
newMaterial.textureMaps.Add(ShaderUniformName.CubeMap, cube);
Logger.LogInfoLinePart(" Cube map :", ConsoleColor.Gray);
for (int i = 0; i < 6; i++)
{
Logger.LogInfoLinePart(cubemapNames[i], ConsoleColor.Cyan);
Logger.LogInfoLinePart(", ", ConsoleColor.Gray);
}
Logger.LogInfoLineEnd();
}
sourceFile.Close();
materials.Add(newMaterial);
return(newMaterial);
}
public void SetTextureUniform(ShaderProgram shaderProgram, int location, ShaderUniformName uniform, TextureMap map)
{
int textureUnit = GetTextureUnitForMap(uniform);
if (uniform == ShaderUniformName.DiffuseMap)
{
GL.ActiveTexture(TextureUnit.Texture0);
}
else if (uniform == ShaderUniformName.IlluminationMap)
{
GL.ActiveTexture(TextureUnit.Texture1);
}
else if (uniform == ShaderUniformName.NormalMap)
{
GL.ActiveTexture(TextureUnit.Texture2);
}
else if (uniform == ShaderUniformName.RoughnessMap)
{
GL.ActiveTexture(TextureUnit.Texture3);
}
else if (uniform == ShaderUniformName.MetallicMap)
{
GL.ActiveTexture(TextureUnit.Texture4);
}
else if (uniform == ShaderUniformName.HeightMap)
{
GL.ActiveTexture(TextureUnit.Texture5);
}
else if (uniform == ShaderUniformName.CubeMap)
{
GL.ActiveTexture(TextureUnit.Texture6);
}
if (textureUnit == -1)
{
Logger.LogError(Logger.ErrorState.Limited, "No defined texture unit for uniform " + ShaderUniformManager.GetSingleton().GetUniformName(uniform) + ", cannot bind");
}
if (uniform == ShaderUniformName.CubeMap)
{
GL.BindTexture(TextureTarget.TextureCubeMap, map.textureGLIndex);
}
else
{
GL.BindTexture(TextureTarget.Texture2D, map.textureGLIndex);
}
shaderProgram.SetSamplerUniform(location, textureUnit);
}