public static BRDFNode Create(Texture texBRDF)
{
var model = new QuadModel();
var vs = new VertexShader(vertexCode);
var fs = new FragmentShader(fragmentCode);
var array = new ShaderArray(vs, fs);
var map = new AttributeMap();
map.Add("aPos", QuadModel.strPosition);
map.Add("aTexCoords", QuadModel.strTexCoord);
var builder = new RenderMethodBuilder(array, map);
var node = new BRDFNode(model, builder);
node.ModelSize = new vec3(2, 2, 2);
node.texBRDF = texBRDF;
node.Initialize();
return(node);
}
private void FormMain_Load(object sender, EventArgs e)
{
var position = new vec3(-0.2f, 0, 1) * 14;
var center = new vec3(0, 0, 0);
var up = new vec3(0, 1, 0);
var camera = new Camera(position, center, up, CameraType.Perspective, this.winGLCanvas1.Width, this.winGLCanvas1.Height);
this.scene = new Scene(camera);
var rootNode = new GroupNode();
this.scene.RootNode = rootNode;
Texture texBRDF = LoadBRDFTexture();
texBRDF.TextureUnitIndex = 2;
Texture prefilterMap = LoadPrefilterMap();
prefilterMap.TextureUnitIndex = 1;
Texture irradianceMap = LoadIrradianceMap();
irradianceMap.TextureUnitIndex = 0;
Texture envCubemap = LoadEnvCubeMap();
Texture texHDR = LoadHDRTexture("newport_loft.hdr");
{
var node = CubemapNode.Create(envCubemap, texHDR);
rootNode.Children.Add(node);
}
{
var node = IrradianceNode.Create(irradianceMap, envCubemap);
rootNode.Children.Add(node);
}
{
var node = BRDFNode.Create(texBRDF);
rootNode.Children.Add(node);
}
{
var sphere = new Sphere2();//(1, 40, 80);
var filename = Path.Combine(System.Windows.Forms.Application.StartupPath, "sphere2.obj_");
sphere.DumpObjFile(filename, "sphere2");
var parser = new ObjVNFParser(false, true);
ObjVNFResult result = parser.Parse(filename);
if (result.Error != null)
{
Console.WriteLine("Error: {0}", result.Error);
}
else
{
ObjVNFMesh mesh = result.Mesh;
var model = new ObjVNF(mesh);
// render rows*column number of spheres with varying metallic/roughness values scaled by rows and columns respectively
for (int row = 0; row < nrRows; ++row)
{
for (int col = 0; col < nrColumns; ++col)
{
var node = PBRNode.Create(model, model.GetSize(),
ObjVNF.strPosition, ObjVNF.strTexCoord, ObjVNF.strNormal);
node.IrradianceMap = irradianceMap;
node.PrefilterMap = prefilterMap;
node.texBRDF = texBRDF;
node.Metallic = (float)row / (float)nrRows;
// we clamp the roughness to 0.025 - 1.0 as perfectly smooth surfaces (roughness of 0.0) tend to look a bit off
// on direct lighting.
node.Roughness = glm.clamp((float)col / (float)nrColumns, 0.05f, 1.0f);
node.WorldPosition = new vec3(
(col - (nrColumns / 2)) * spacing,
(row - (nrRows / 2)) * spacing,
0.0f);
rootNode.Children.Add(node);
}
}
}
}
{
var backgroundNode = BackgroundNode.Create(envCubemap);
rootNode.Children.Add(backgroundNode);
}
var list = new ActionList();
var transformAction = new TransformAction(scene);
list.Add(transformAction);
var renderAction = new RenderAction(scene);
list.Add(renderAction);
this.actionList = list;
var manipulater = new FirstPerspectiveManipulater();
manipulater.Bind(camera, this.winGLCanvas1);
}