[BUG?] Error entering emissive map shader when following the Particle material tutorial

Fredrik_L · May 20, 2017, 12:25pm

Hi,

I’m trying to recreate the particle material tutorial. It works with the Color shader example:

shader ColorShader : ComputeColor
{
    override float4 Compute()
    {
        return float4(0, 1, 0, 1);
    }
};

However, I want to modify the RadialParticleTexture:

shader TextureShader<float4 ColorCenter, float4 ColorEdge> : ComputeColor, Texturing
{
    override float4 Compute()
    {
        float radialDistance = length(streams.TexCoord - float2(0.5, 0.5)) * 2;

        float4 unclamped = lerp(ColorCenter, ColorEdge, radialDistance);

        // We want to allow the intensity to grow a lot, but cap the alpha to 1
        float4 clamped = clamp(unclamped, float4(0, 0, 0, 0), float4(1000, 1000, 1000, 1));

        // Remember that we use a premultiplied alpha pipeline so all color values should be premultiplied
        clamped.rgb *= clamped.a;

        return clamped;
    }
};

I get the following error in Game Studio:

System.AggregateException: One or more errors occurred. ---> System.AggregateException: One or more errors occurred. ---> System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.Where[TSource](IEnumerable`1 source, Func`2 predicate)
   at SiliconStudio.Xenko.Shaders.Parser.ShaderMixinParser.Parse(ShaderMixinSource shaderMixinSource, ShaderMacro[] macros) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders.Parser\ShaderMixinParser.cs:line 205
   at SiliconStudio.Xenko.Shaders.Compiler.EffectCompiler.Compile(ShaderMixinSource mixinTree, EffectCompilerParameters effectParameters, CompilerParameters compilerParameters) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders.Compiler\EffectCompiler.cs:line 142
   at SiliconStudio.Xenko.Shaders.Compiler.EffectCompilerCache.CompileBytecode(ShaderMixinSource mixinTree, EffectCompilerParameters effectParameters, CompilerParameters compilerParameters, ObjectId mixinObjectId, DatabaseFileProvider database, String compiledUrl) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders\Compiler\EffectCompilerCache.cs:line 169
   at SiliconStudio.Xenko.Shaders.Compiler.EffectCompilerCache.<>c__DisplayClass21_1.<Compile>b__0() in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders\Compiler\EffectCompilerCache.cs:line 149
   at System.Threading.Tasks.Task`1.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
   at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
   at SiliconStudio.Xenko.Rendering.EffectSystem.<>c__DisplayClass21_0.<LoadEffect>b__0(Task`1 x) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Engine\Rendering\EffectSystem.cs:line 188
   at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
   at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
   at SiliconStudio.Xenko.Rendering.RootEffectRenderFeature.PrepareEffectPermutations(RenderDrawContext context) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Engine\Rendering\RootEffectRenderFeature.cs:line 556
   at SiliconStudio.Xenko.Rendering.RenderSystem.Prepare(RenderDrawContext context) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Engine\Rendering\RenderSystem.cs:line 231
   at SiliconStudio.Xenko.Rendering.Compositing.GraphicsCompositor.DrawCore(RenderDrawContext context) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Engine\Rendering\Compositing\GraphicsCompositor.cs:line 111
   at SiliconStudio.Xenko.Rendering.RendererBase.Draw(RenderDrawContext context) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Engine\Rendering\RendererBase.cs:line 50
   at SiliconStudio.Xenko.Engine.SceneSystem.Draw(GameTime gameTime) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Engine\Engine\SceneSystem.cs:line 209
   at SiliconStudio.Xenko.Games.GameSystemCollection.Draw(GameTime gameTime) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Games\GameSystemCollection.cs:line 128
   at SiliconStudio.Xenko.Games.GameBase.Draw(GameTime gameTime) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Games\GameBase.cs:line 785
   at SiliconStudio.Xenko.Editor.EditorGame.Game.EditorServiceGame.Draw(GameTime gameTime) in C:\TeamCity\work\80a49494ba341a6a\sources\editor\SiliconStudio.Xenko.Editor\EditorGame\Game\EditorServiceGame.cs:line 135
---> (Inner Exception #0) System.AggregateException: One or more errors occurred. ---> System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.Where[TSource](IEnumerable`1 source, Func`2 predicate)
   at SiliconStudio.Xenko.Shaders.Parser.ShaderMixinParser.Parse(ShaderMixinSource shaderMixinSource, ShaderMacro[] macros) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders.Parser\ShaderMixinParser.cs:line 205
   at SiliconStudio.Xenko.Shaders.Compiler.EffectCompiler.Compile(ShaderMixinSource mixinTree, EffectCompilerParameters effectParameters, CompilerParameters compilerParameters) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders.Compiler\EffectCompiler.cs:line 142
   at SiliconStudio.Xenko.Shaders.Compiler.EffectCompilerCache.CompileBytecode(ShaderMixinSource mixinTree, EffectCompilerParameters effectParameters, CompilerParameters compilerParameters, ObjectId mixinObjectId, DatabaseFileProvider database, String compiledUrl) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders\Compiler\EffectCompilerCache.cs:line 169
   at SiliconStudio.Xenko.Shaders.Compiler.EffectCompilerCache.<>c__DisplayClass21_1.<Compile>b__0() in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders\Compiler\EffectCompilerCache.cs:line 149
   at System.Threading.Tasks.Task`1.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
   at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
   at SiliconStudio.Xenko.Rendering.EffectSystem.<>c__DisplayClass21_0.<LoadEffect>b__0(Task`1 x) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Engine\Rendering\EffectSystem.cs:line 188
   at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()
---> (Inner Exception #0) System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.Where[TSource](IEnumerable`1 source, Func`2 predicate)
   at SiliconStudio.Xenko.Shaders.Parser.ShaderMixinParser.Parse(ShaderMixinSource shaderMixinSource, ShaderMacro[] macros) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders.Parser\ShaderMixinParser.cs:line 205
   at SiliconStudio.Xenko.Shaders.Compiler.EffectCompiler.Compile(ShaderMixinSource mixinTree, EffectCompilerParameters effectParameters, CompilerParameters compilerParameters) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders.Compiler\EffectCompiler.cs:line 142
   at SiliconStudio.Xenko.Shaders.Compiler.EffectCompilerCache.CompileBytecode(ShaderMixinSource mixinTree, EffectCompilerParameters effectParameters, CompilerParameters compilerParameters, ObjectId mixinObjectId, DatabaseFileProvider database, String compiledUrl) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders\Compiler\EffectCompilerCache.cs:line 169
   at SiliconStudio.Xenko.Shaders.Compiler.EffectCompilerCache.<>c__DisplayClass21_1.<Compile>b__0() in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders\Compiler\EffectCompilerCache.cs:line 149
   at System.Threading.Tasks.Task`1.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()<---
<---

_Otherwise I have tried to follow the documentation and sample: _

In VS 2017:
Add a code file TextureShader.xksl
Copy the code from the sample, changing the name to TextureShader
Compile.

When I set the shader to the particle material Right channel, I get:

System.AggregateException: One or more errors occurred. ---> System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.Where[TSource](IEnumerable`1 source, Func`2 predicate)
   at SiliconStudio.Xenko.Shaders.Parser.ShaderMixinParser.Parse(ShaderMixinSource shaderMixinSource, ShaderMacro[] macros) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders.Parser\ShaderMixinParser.cs:line 205
   at SiliconStudio.Xenko.Shaders.Compiler.EffectCompiler.Compile(ShaderMixinSource mixinTree, EffectCompilerParameters effectParameters, CompilerParameters compilerParameters) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders.Compiler\EffectCompiler.cs:line 142
   at SiliconStudio.Xenko.Shaders.Compiler.EffectCompilerCache.CompileBytecode(ShaderMixinSource mixinTree, EffectCompilerParameters effectParameters, CompilerParameters compilerParameters, ObjectId mixinObjectId, DatabaseFileProvider database, String compiledUrl) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders\Compiler\EffectCompilerCache.cs:line 169
   at SiliconStudio.Xenko.Shaders.Compiler.EffectCompilerCache.<>c__DisplayClass21_1.<Compile>b__0() in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders\Compiler\EffectCompilerCache.cs:line 149
   at System.Threading.Tasks.Task`1.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
   at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
   at SiliconStudio.Xenko.Shaders.Compiler.TaskOrResult`1.GetCurrentResult() in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders\Compiler\TaskOrResult.cs:line 55
   at SiliconStudio.Xenko.Rendering.EffectSystem.<>c__DisplayClass25_0.<UpdateEffects>b__0(CompilerResults results) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Engine\Rendering\EffectSystem.cs:line 348
   at System.Collections.Generic.List`1.RemoveAll(Predicate`1 match)
   at SiliconStudio.Xenko.Rendering.EffectSystem.UpdateEffects() in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Engine\Rendering\EffectSystem.cs:line 346
   at SiliconStudio.Xenko.Games.GameSystemCollection.Update(GameTime gameTime) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Games\GameSystemCollection.cs:line 94
   at SiliconStudio.Xenko.Editor.EditorGame.Game.EditorServiceGame.Update(GameTime gameTime) in C:\TeamCity\work\80a49494ba341a6a\sources\editor\SiliconStudio.Xenko.Editor\EditorGame\Game\EditorServiceGame.cs:line 112
---> (Inner Exception #0) System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.Where[TSource](IEnumerable`1 source, Func`2 predicate)
   at SiliconStudio.Xenko.Shaders.Parser.ShaderMixinParser.Parse(ShaderMixinSource shaderMixinSource, ShaderMacro[] macros) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders.Parser\ShaderMixinParser.cs:line 205
   at SiliconStudio.Xenko.Shaders.Compiler.EffectCompiler.Compile(ShaderMixinSource mixinTree, EffectCompilerParameters effectParameters, CompilerParameters compilerParameters) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders.Compiler\EffectCompiler.cs:line 142
   at SiliconStudio.Xenko.Shaders.Compiler.EffectCompilerCache.CompileBytecode(ShaderMixinSource mixinTree, EffectCompilerParameters effectParameters, CompilerParameters compilerParameters, ObjectId mixinObjectId, DatabaseFileProvider database, String compiledUrl) in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders\Compiler\EffectCompilerCache.cs:line 169
   at SiliconStudio.Xenko.Shaders.Compiler.EffectCompilerCache.<>c__DisplayClass21_1.<Compile>b__0() in C:\TeamCity\work\80a49494ba341a6a\sources\engine\SiliconStudio.Xenko.Shaders\Compiler\EffectCompilerCache.cs:line 149
   at System.Threading.Tasks.Task`1.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()<---

I can run the sample project fine so I must be doing something wrong, I just can’t figure out what it would be?
I have duplicated the particle source Material settings 100 times, and they are copied exactly from the sample. Is there anything outside the particle material settings I need to consider to get this working?

Any suggestions appreciated, thanks!

/F

Fredrik_L · May 20, 2017, 11:09pm

I discovered something funny with this:
I CAN copy the particle system from the sample to my project. I can also attach it as a sub-entity to my entity, and it still works.

However, if I change the Right channel of the Emissive Map to something other than Shader, e.g. Color, and back to shader again entering the shader name “ComputeColorRadial” I get this error again. I don’t have the inner drop-down to select the effect shader shown in the manual, so I have to enter the shader name by hand. (Yes I checked the spelling), and this seems to fail.

I can replicate this behavior directly in the particles sample as well, so it looks like a bug in Game Studio at this point. But just for fun I tried to enter “ComputeColorRed” in that very same Right channel, and what do you know, THAT WORKS. Seems wierd that I can select one shader but not the other, but maybe it has to do with the fact that ComputeColorRadial has generic attributes that need to be shown in Game Studio but ComputeColorRed doesn’t?

Fredrik_L · May 23, 2017, 10:56am

For posterity,

I removed the generic attributes from the shader and then it works fine.
To me it looks like a Game Studio bug, as the shader builds fine in VS, but can’t be used in GS.
Not being able to provide input to the shader inhibits reusability, but that’s allright for my little project.