// Adds material and sets up its dependent technique, program, shaders. This should be called
// after adding meshes, but before populating lights, textures, etc.
// Pass:
// hack - attributes of some mesh that uses this material
public void AddMaterialWithDependencies(
IExportableMaterial exportableMaterial,
string meshNamespace,
GlTF_Attributes hack)
{
GlTF_Material gltfMtl = G.CreateMaterial(meshNamespace, exportableMaterial);
// Set up technique.
GlTF_Technique tech = GlTF_Writer.CreateTechnique(G, exportableMaterial);
gltfMtl.instanceTechniqueName = tech.name;
GlTF_Technique.States states = null;
if (m_techniqueStates.ContainsKey(exportableMaterial))
{
states = m_techniqueStates[exportableMaterial];
}
if (states == null)
{
// Unless otherwise specified the preset, enable z-buffering.
states = new GlTF_Technique.States();
states.enable = new[] { GlTF_Technique.Enable.DEPTH_TEST }.ToList();
}
tech.states = states;
AddAllAttributes(tech, exportableMaterial, hack);
tech.AddDefaultUniforms(G.RTCCenter != null);
// Add program.
GlTF_Program program = new GlTF_Program(G);
program.name = GlTF_Program.GetNameFromObject(exportableMaterial);
tech.program = program.name;
foreach (var attr in tech.attributes)
{
program.attributes.Add(attr.name);
}
G.programs.Add(program);
// Add vertex and fragment shaders.
GlTF_Shader vertShader = new GlTF_Shader(G);
vertShader.name = GlTF_Shader.GetNameFromObject(exportableMaterial, GlTF_Shader.Type.Vertex);
program.vertexShader = vertShader.name;
vertShader.type = GlTF_Shader.Type.Vertex;
vertShader.uri = ExportFileReference.CreateHttp(exportableMaterial.VertShaderUri);
G.shaders.Add(vertShader);
GlTF_Shader fragShader = new GlTF_Shader(G);
fragShader.name = GlTF_Shader.GetNameFromObject(exportableMaterial, GlTF_Shader.Type.Fragment);
program.fragmentShader = fragShader.name;
fragShader.type = GlTF_Shader.Type.Fragment;
fragShader.uri = ExportFileReference.CreateHttp(exportableMaterial.FragShaderUri);
G.shaders.Add(fragShader);
}
/// Returns an ExportFileReference given an absolute http:// uri.
/// Depending on settings, this may become a relative reference in the gltf.
private ExportFileReference CreateExportFileReferenceFromHttp(string httpUri)
{
if (!AllowHttpUri)
{
string localPath = HostedUriToLocalFilename(httpUri);
if (localPath != null)
{
return(ExportFileReference.GetOrCreateSafeLocal(
G.m_disambiguationContext,
Path.GetFileName(localPath), Path.GetDirectoryName(localPath),
"Brush_" + Path.GetFileName(localPath)));
}
Debug.LogWarning($"Cannot convert {httpUri} to local");
}
return(ExportFileReference.CreateHttp(httpUri));
}