예제 #1
0
        public override void VisitFeature(MaterialGeneratorContext context)
        {
            // determine if an tessellation material have already been added in another layer
            HasAlreadyTessellationFeature = context.GetStreamFinalModifier <MaterialTessellationBaseFeature>(MaterialShaderStage.Domain) != null;

            // Notify problem on multiple tessellation techniques and return
            if (HasAlreadyTessellationFeature)
            {
                context.Log.Warning("A material cannot have more than one layer performing tessellation. The first tessellation method found, will be used.");
                return;
            }

            // reset the tessellation stream at the beginning of the stage
            context.AddStreamInitializer(MaterialShaderStage.Domain, "MaterialTessellationStream");

            // set the desired triangle size desired for this material
            context.Parameters.Set(TessellationKeys.DesiredTriangleSize, TriangleSize);

            // set the tessellation method and callback to add Displacement/Normal average shaders.
            if (AdjacentEdgeAverage && !context.Tags.Get(HasFinalCallback))
            {
                context.Tags.Set(HasFinalCallback, true);
                context.Material.TessellationMethod = ParadoxTessellationMethod.AdjacentEdgeAverage;
                context.AddFinalCallback(MaterialShaderStage.Domain, AddAdjacentEdgeAverageMacros);
                context.AddFinalCallback(MaterialShaderStage.Domain, AddAdjacentEdgeAverageShaders);
            }
        }
예제 #2
0
        public void AddAdjacentEdgeAverageShaders(MaterialShaderStage stage, MaterialGeneratorContext context)
        {
            var tessellationShader = context.Parameters.Get(MaterialKeys.TessellationShader) as ShaderMixinSource;

            if (tessellationShader == null)
            {
                return;
            }

            if (context.GetStreamFinalModifier <MaterialDisplacementMapFeature>(MaterialShaderStage.Domain) != null)
            {
                tessellationShader.Mixins.Add(new ShaderClassSource("TessellationAE2", "TexCoord")); // this suppose Displacement from Texture -> TODO make it more flexible so that it works with any kind of displacement.
                tessellationShader.Mixins.Add(new ShaderClassSource("TessellationAE3", "normalWS"));
            }
        }