public bool LoadShader(string fileName)
{
var oldshader = Shader;
var oldshaderpath = _shaderPath;
Shader = new GenericShader(fileName);
try
{
Shader.Create(_device);
_shaderPath = fileName;
Update(0f);
if (_modelPath != string.Empty)
{
LoadModel(_modelPath);
}
}
catch (Exception ex)
{
Shader = oldshader;
_shaderPath = oldshaderpath;
if (_modelPath != string.Empty)
{
LoadModel(_modelPath);
}
Update(0f);
MessageBox.Show($"Failed to load shader, Exception: {ex.Message}");
return(false);
}
return(true);
}
public void Create(Device1 device, GenericShader effect)
{
PrimitiveTopology = PrimitiveTopology.TriangleList;
VertexStride = effect.VertexStride;
List <int> indices = new List <int>();
var importer = new AssimpContext();
Scene scene = importer.ImportFile(_fileName, PostProcessSteps.GenerateSmoothNormals | PostProcessSteps.CalculateTangentSpace | PostProcessSteps.Triangulate);
if (!importer.IsImportFormatSupported(Path.GetExtension(_fileName)))
{
throw new Exception("File Format not supported");
}
long vertCount = 0;
foreach (var model in scene.Meshes)
{
vertCount += model.VertexCount;
}
var verts = new float[VertexStride * vertCount];
int meshOffset = 0;
foreach (var model in scene.Meshes)
{
for (var i = 0; i < model.VertexCount; ++i)
{
var pos = model.Vertices[i];
var nor = model.Normals[i];
var uv = model.TextureCoordinateChannels[0][i];
uv.Y = -uv.Y;
var col = model.HasVertexColors(0) ? model.VertexColorChannels[0][i] : new Color4D(1, 0, 1);
var tan = model.Tangents[i];
var inputOffset = 0;
foreach (var inputParam in effect.InputParameters)
{
if (inputParam.SemanticName == "POSITION")
{
Array.Copy(pos.ToArray(), 0, verts, i * (VertexStride / sizeof(float)) + inputOffset + meshOffset, 3);
inputOffset += 3;
}
else if (inputParam.SemanticName == "NORMAL")
{
Array.Copy(nor.ToArray(), 0, verts, i * (VertexStride / sizeof(float)) + inputOffset + meshOffset, 3);
inputOffset += 3;
}
else if (inputParam.SemanticName == "COLOR")
{
Array.Copy(col.ToArray(), 0, verts, i * (VertexStride / sizeof(float)) + inputOffset + meshOffset, 4);
inputOffset += 4;
}
else if (inputParam.SemanticName == "TEXCOORD" || inputParam.SemanticName == "TEXCOORD0")
{
Array.Copy(uv.ToArray(), 0, verts, i * (VertexStride / sizeof(float)) + inputOffset + meshOffset, 2);
inputOffset += 2;
}
else if (inputParam.SemanticName == "TANGENT")
{
Array.Copy(tan.ToArray(), 0, verts, i * (VertexStride / sizeof(float)) + inputOffset + meshOffset, 3);
inputOffset += 3;
}
else
{
MessageBox.Show("AssimpModel::Create() > Unsupported Semantic type! ({inputParam.SemanticName})");
}
}
}
meshOffset += model.VertexCount * VertexStride;
indices.AddRange(model.GetIndices().ToList());
}
IndexCount = indices.Count;
BufferDescription bd = new BufferDescription(
(int)(verts.Length),
ResourceUsage.Immutable,
BindFlags.VertexBuffer,
CpuAccessFlags.None,
ResourceOptionFlags.None);
VertexBuffer = new Buffer(device, DataStream.Create(verts, false, false), bd);
bd = new BufferDescription(
sizeof(int) * IndexCount,
ResourceUsage.Immutable,
BindFlags.IndexBuffer,
CpuAccessFlags.None,
ResourceOptionFlags.None);
IndexBuffer = new Buffer(device, DataStream.Create(indices.ToArray(), false, false), bd);
}