DirectX Tool Kit

New Post: Create dynamic texture on SpriteBatch in WP8.

slavo_par — Fri, 24 May 2013 13:09:52 GMT

Hello . I have one spriteBatch witch the texture. When i click on this spritebatch then I would change color of the texture to 'grayscale' or 'sepia' . Does Directxtk support any effect with grayscale or sepia?
Could you help me?

Commented Unassigned: Implement polyhedron as geometric primitive [931]

walbourn — Fri, 24 May 2013 06:22:40 GMT

DirectXTK implements a number of GeometricPrimitives, but it is missing several shapes supported by OpenGL's glut library.

* glut*Dodecahedron
* glut*Octahedron
* glut*Tetrahedron
* glut*Icosahedron

This combined with the existing Cube implementation make up the '[platonic solids](http://en.wikipedia.org/wiki/Platonic_solid)'

PS: It's also missing glut*Cone, but that's covered by [921](https://directxtk.codeplex.com/workitem/921)
Comments: ** Comment from web user: walbourn **

Vertex and connectivity information for these shapes is pretty easy to come by

Schneider & Eberly, _Geometric Tools for Computer Graphics_, pg 346-351

Normals for these shapes are 'face-normals' necessitating vertex duplication. but should also be fairly easy to derive.

The real challenge is going to be to provide reasonable texture coordinates. It looks like 'gift-wrapping' or just projection of a sphere are the choices here.

Commented Unassigned: Implement polyhedron as geometric primitive [931]

walbourn — Wed, 22 May 2013 22:42:29 GMT

DirectXTK implements a number of GeometricPrimitives, but it is missing a number of shapes supported by OpenGL's glut library.

* glut*Dodecahedron
* glut*Octahedron
* glut*Tetrahedron
* glut*Icosahedron

This combined with the existing Cube implementation make up the '[platonic solids](http://en.wikipedia.org/wiki/Platonic_solid)'

PS: It's also missing glut*Cone, but that's covered by [921](https://directxtk.codeplex.com/workitem/921)
Comments: ** Comment from web user: walbourn **

Note that one difference between DirectXTK and OpenGL's glUT is that DirectXTK supports texture coordinates as well as normal on all GeometricPrimitive shapes. glut supports normals but not texture coordinates except on the Utah teapot.

Updated Wiki: GeometricPrimitive

walbourn — Wed, 22 May 2013 22:32:33 GMT

This is a helper for drawing simple geometric shapes including texture coordinates and surface normals.

Cube
Sphere
Geodesic Sphere
Cylinder
Torus
Teapot

Initialization

The GeometryPrimitive class must be created from a factory method which takes the Direct3D 11 device context.

std::unique_ptr<GeometricPrimitive> shape(
GeometricPrimitive::CreateTeapot(deviceContext) );

For exception safety, it is recommended you make use of the C++ RAII pattern and use a std::unique_ptr or std::shared_ptr

CreateCube( deviceContext, float size = 1)
CreateSphere( deviceContext, float diameter = 1, size_t tessellation = 16)
CreateGeoSphere( deviceContext, float diameter = 1, size_t tessellation = 3)
CreateCylinder( deviceContext, float height = 1, float diameter = 1, size_t tessellation = 32)
CreateTorus( deviceContext, float diameter = 1, float thickness = 0.333f, size_t tessellation = 32)
CreateTeapot( deviceContext, float size = 1, size_t tessellation = 8)

Simple drawing

shape->Draw(world, view, projection, Colors::CornflowerBlue);

The draw method accepts an optional texture parameter, wireframe flag, and a callback function which can be used to override the default rendering state:

shape->Draw(world, view, projection, Colors::White, catTexture, false, [=]
{
    deviceContext->OMSetBlendState(...);
});

This makes use of a BasicEffect shared by all geometric primitives drawn on that device context.

Advanced drawing

This form of drawing makes use of a custom Effects instance. The caller is responsible for using an input layout that matches the effect.

IEffect* myeffect = ...

Microsoft::WRL::ComPtr<ID3D11InputLayout> inputLayout;
shape->CreateInputLayout( myeffect, &inputLayout );

shape->Draw( myeffect, inputLayout.Get() );

This takes an optional parameter for enabling alpha-blending, wireframe, and a callback function which can be used to override the default rendering state.

Coordinate systems

These geometric primitives (based on the XNA Game Studio conventions) use right-handed coordinates. They can be used with left-handed coordinates by setting the rhcoords parameter on the factory methods to 'false' to reverse the winding ordering (the parameter defaults to 'true').

std::unique_ptr<GeometricPrimitive> shape(
GeometricPrimitive::CreateTeapot( deviceContext, 1.f, 8, false ) );

Alpha blending

Alpha blending defaults to using premultiplied alpha. To make use of 'straight' alpha textures, override the blending mode via the optional callback:

CommonStates states(deviceContext);

shape->Draw(world, view, projection, Colors::White, catTexture, false, [=]
{
    deviceContext->OMSetBlendState( states.NonPremultiplied(), nullptr, 0xFFFFFFFF);
});

Feature Level Notes

In order to support all feature levels, the GeometricPrimitive implementation make use of 16-bit indices (DXGI_FORMAT_R16_UINT) which limits to a maximum of 65535 vertices. Feature Level 9.1 is limited to a maximum of 65535 primitives in a single draw.

Threading model

Each GeometricPrimitive instance only supports drawing from one thread at a time, but you can simultaneously submit primitives on multiple threads if you create a separate GeometricPrimitive instance per Direct3D 11 deferred context.
http://msdn.microsoft.com/en-us/library/windows/desktop/ff476892.aspx

Updated Wiki: GeometricPrimitive

walbourn — Wed, 22 May 2013 22:29:11 GMT

This is a helper for drawing simple geometric shapes including texture coordinates and surface normals.

Cube
Sphere
Geodesic Sphere
Cylinder
Torus
Teapot

Initialization

The GeometryPrimitive class must be created from a factory method which takes the Direct3D 11 device context.

std::unique_ptr<GeometricPrimitive> shape(
GeometricPrimitive::CreateTeapot(deviceContext) );

For exception safety, it is recommended you make use of the C++ RAII pattern and use a std::unique_ptr or std::shared_ptr

CreateCube( deviceContext, float size = 1)
CreateSphere( deviceContext, float diameter = 1, size_t tessellation = 16)
CreateGeoSphere( deviceContext, float diameter = 1, size_t tessellation = 3)
CreateCylinder( deviceContext, float height = 1, float diameter = 1, size_t tessellation = 32)
CreateTorus( deviceContext, float diameter = 1, float thickness = 0.333f, size_t tessellation = 32)
CreateTeapot( deviceContext, float size = 1, size_t tessellation = 8)

Simple drawing

shape->Draw(world, view, projection, Colors::CornflowerBlue);

The draw method accepts an optional texture parameter, wireframe flag, and a callback function which can be used to override the default rendering state:

shape->Draw(world, view, projection, Colors::White, catTexture, false, [=]
{
    deviceContext->OMSetBlendState(...);
});

This makes use of a BasicEffect shared by all geometric primitives drawn on that device context.

Advanced drawing

This form of drawing makes use of a custom Effects instance. The caller is responsible for using an input layout that matches the effect.

IEffect* myeffect = ...

Microsoft::WRL::ComPtr<ID3D11InputLayout> inputLayout;
shape->CreateInputLayout( myeffect, &inputLayout );

shape->Draw( myeffect, inputLayout.Get() );

This takes an optional parameter for enabling alpha-blending, wireframe, and a callback function which can be used to override the default rendering state.

Coordinate systems

std::unique_ptr<GeometricPrimitive> shape(
GeometricPrimitive::CreateTeapot( deviceContext, 1.f, 8, false ) );

Alpha blending

Alpha blending defaults to using premultiplied alpha. To make use of 'straight' alpha textures, override the blending mode via the optional callback:

CommonStates states(deviceContext);

shape->Draw(world, view, projection, Colors::White, catTexture, false, [=]
{
    deviceContext->OMSetBlendState( states.NonPremultiplied(), nullptr, 0xFFFFFFFF);
});

Feature Level Notes

Threading model

Commented Unassigned: Implement polyhedron as geometric primitive [931]

walbourn — Wed, 22 May 2013 22:22:25 GMT

DirectXTK implements a number of GeometricPrimitives, but it is missing a number of shapes supported by OpenGL's glut library.

* glut*Dodecahedron
* glut*Octahedron
* glut*Tetrahedron
* glut*Icosahedron

PS: It's also missing glut*Cone, but that's covered by [921](https://directxtk.codeplex.com/workitem/921)
Comments: ** Comment from web user: walbourn **

[Dodecahedron](http://en.wikipedia.org/wiki/Dodecahedron)
[Octahedron](http://en.wikipedia.org/wiki/Octahedron)
[Tetrahedron](http://en.wikipedia.org/wiki/Tetrahedron)
[Icosahedron](http://en.wikipedia.org/wiki/Icosahedron)

Commented Feature: Implement cone as geometry primitive [921]

walbourn — Wed, 22 May 2013 22:22:12 GMT

Hello,

I'm sorry if this is not the right place to request, is there a chance to implement a cone as a geometry primitive in DirectxTK?

the reason is, cones are very useful in implementing spot lights, especially in deferred or pre-pass lightning renderers.

thanks in advance.
Comments: ** Comment from web user: walbourn **

Related to workitem [931](https://directxtk.codeplex.com/workitem/931)

Created Unassigned: Implement polyhedron as geometric primitive [931]

walbourn — Wed, 22 May 2013 22:20:51 GMT

DirectXTK implements a number of GeometricPrimitives, but it is missing a number of shapes supported by OpenGL's glut library.

* glut*Dodecahedron
* glut*Octahedron
* glut*Tetrahedron
* glut*Icosahedron

PS: It's also missing glut*Cone, but that's covered by [921](https://directxtk.codeplex.com/workitem/921)

Commented Feature: Implement cone as geometry primitive [921]

walbourn — Wed, 22 May 2013 22:17:32 GMT

Thanks for the suggestion. Note that the choice of GeometricPrimitives we already implemented was based on historical precedent.

XNA Game Studio same "Primitives3D"
http://xbox.create.msdn.com/en-US/education/catalog/sample/primitives_3d

DXUT 'shapes' (cube, sphere, cylinder, torus, teapot)

OpenGL's glut implements glut*Cone, so this seems like a reasonable request.

New Post: AccessViolationException while creating SpriteBatch

progs — Fri, 17 May 2013 06:12:07 GMT

Hello,

that's it. Works all fine now. Thanks!

New Post: AccessViolationException while creating SpriteBatch

dajyareo — Thu, 16 May 2013 20:26:55 GMT

I imagine that's because the interop hasn't completed initializing yet. Put it in CubeRenderer::CreateWindowSizeDependentResources() instead, or somewhere else.

New Post: AccessViolationException while creating SpriteBatch

progs — Wed, 15 May 2013 18:03:50 GMT

Hello,

I don't get an StackTrace. The Problem i think is here the mixed C++ and C# Code. The WP8 Project is written in C# and includes the C++ Library. I only get the ArgumentViolationException. I also do not think the m_d3dContext is bad, because if I remove the SpriteBatch initialization, all other code (including Context Methods) work fine.

I use the Standard Default Template of Visual Studio and only added the DirectX Tool Kit.

New Post: AccessViolationException while creating SpriteBatch

dajyareo — Wed, 15 May 2013 17:07:33 GMT

Usually I've found this will happen when you've got a bad pointer (perhaps you deleted it somewhere or it was never initialized?). I'd need more information (a stack trace would be handy here) to help you figure out what the cause was. If it's happening when you create your SpriteBatch object, I'd bet your m_d3dContext pointer is bad.

New Post: AccessViolationException while creating SpriteBatch

progs — Wed, 15 May 2013 08:42:54 GMT

Hello,

if I try to create a new SpriteBatch, I get an AccessViolationException on (MainPage.xaml)

DrawingSurfaceBackground.SetBackgroundContentProvider(m_d3dBackground.CreateContentProvider());

Code to init SpriteBatch (CubeRenderer.cpp in CreateDeviceResources()):

m_spriteBatch = unique_ptr<SpriteBatch>(new SpriteBatch(m_d3dContext.Get()));

As Project Template I use the default Windows Phone Direct3D with XAML Tempalte of the Windows Phone 8 SDK and I modify the CubeRenderer basic class. Does anyone know this issue?

New Post: Batching textured quads using BasicEffect and PrimitiveBatch

dajyareo — Wed, 15 May 2013 05:55:35 GMT

That article was perfect! It really helped me understand what was actually going on and how to draw my billboards correctly. My rendering looks great now and is batched together.

Thanks again Shawn! Also, it seems like your blog has a wealth of free information. I'll be studying up on it a lot in the future :)

New Post: Batching textured quads using BasicEffect and PrimitiveBatch

ShawnHargreaves — Wed, 15 May 2013 03:22:40 GMT

This article might help with your question about depth sorting:

http://blogs.msdn.com/b/shawnhar/archive/2009/02/18/depth-sorting-alpha-blended-objects.aspx

New Post: Batching textured quads using BasicEffect and PrimitiveBatch

dajyareo — Tue, 14 May 2013 20:14:53 GMT

Thanks Shawn, this is very helpful. I'll take your advice and do a XMVector3Transform() to transform my positions on the CPU using the billboard's world matrix before rendering, keeping each billboard using the same state for the batch.

The 2nd concern I had was the ordering of the billboards when they were drawn. Giving each billboard its own separate batch had them clipping each other. Do I have to sort manually via Z order before drawing or is there a way to have PrimitiveBatch do the right thing?

Thanks again for your help!

Jared

New Post: Batching textured quads using BasicEffect and PrimitiveBatch

ShawnHargreaves — Tue, 14 May 2013 19:48:26 GMT

You cannot change state settings in between individual draw calls within a single batch. The whole point of a batch is to 'batch' up many draw calls, then submit them to the GPU all in one go. So by definition, it's impossible to have a different state for each draw, because there is really only one single combined draw taking place.

The simplest solution is to use a separate batch (begin/end block) for each object that you want to draw using a different state. First set the state, then begin the batch, then draw, then end the batch.

A more efficient approach is to draw everything in a single batch, and change your rendering algorithms so that all the objects within the batch can use the same state. This means no longer applying a different world matrix to the effect per draw. One way to do that would be to leave the effect world matrix set to identity, and instead apply that same transform to your source vertex positions on the CPU, before passing them to PrimitiveBatch.

An even more efficient but complex way to draw very large numbers of billboards is to do the billboarding computation inside the vertex shader. I don't know of a good D3D sample showing this technique, but the XNA Particle 3D sample uses this idea.

New Post: Batching textured quads using BasicEffect and PrimitiveBatch

dajyareo — Tue, 14 May 2013 17:35:31 GMT

I've been struggling a bit to get this working the right way.. figured I'd give this forum a try.

I'd like to batch a textured billboard quad draw using BasicEffect and PrimitiveBatch.. but I'm not sure how to go about doing this.

What I'm trying to do looks something like this:


// Setup during initialization
BasicEffect* be = new BasicEffect(dc);
be->SetTextureEnabled(true);
be->EnableDefaultLighting(true);

// Load shader blob using BasicEffect and Create input layout using
// VertexPositionNormalColorTexture in DirectXTK
// Create PrimitiveBatch<VertexPositionNormalColorTexture> 

// Every Update Call 
be->SetProjection(camera->GetProjection);
be->SetView(camera->GetView);

// Every draw call
be->SetTexture(myTexture);
be->Apply(dc);
dc->IASetInputLayout(myLayout);
primitiveBatch->Begin();

for(auto it = billboards.begin(); it != billboards.end(); it++)
{
    be->SetWorld(it->GetWorld());
    be->Apply(dc);
    primitiveBatch->DrawQuad(/* draw quad vertices untransformed */);
}

primitiveBatch->End();

In case it's not clear from my code, I'm trying to save to the perframe const buffer the final world translation of each billboard in the effect before calling primitiveBatch draw. The only way I can get this to work properly is do a PrimitiveBatch::Begin() and ::End() call per billboard with each having the basic effect's world translation set each time before the call to ::Begin().

Also, even with my non-batch like calls to PrimitiveBatch, my billboards do not draw in the correct order... Although they do show up as transparent, when placed next to each other, they seem to clip each other. Do I have to manually order each one before drawing in the batch based on its z value?

Thanks!

Jared

New Post: Where to start

walbourn — Tue, 14 May 2013 06:55:56 GMT

There's a ton of material on MSDN for Windows Store and Windows phone 8 which is your best place to start for overviews...

As for DirectXTK, there are a few basic samples to get you started:

DirectX Tool Kit

New Post: Create dynamic texture on SpriteBatch in WP8.

Commented Unassigned: Implement polyhedron as geometric primitive [931]

Commented Unassigned: Implement polyhedron as geometric primitive [931]

Updated Wiki: GeometricPrimitive

Initialization

Simple drawing

Advanced drawing

Coordinate systems

Alpha blending

Feature Level Notes

Threading model

Further Reading

Updated Wiki: GeometricPrimitive

Initialization

Simple drawing

Advanced drawing

Coordinate systems

Alpha blending

Feature Level Notes

Threading model

Further Reading

Commented Unassigned: Implement polyhedron as geometric primitive [931]

Commented Feature: Implement cone as geometry primitive [921]

Created Unassigned: Implement polyhedron as geometric primitive [931]

Commented Feature: Implement cone as geometry primitive [921]

New Post: AccessViolationException while creating SpriteBatch

New Post: AccessViolationException while creating SpriteBatch

New Post: AccessViolationException while creating SpriteBatch

New Post: AccessViolationException while creating SpriteBatch

New Post: AccessViolationException while creating SpriteBatch

New Post: Batching textured quads using BasicEffect and PrimitiveBatch

New Post: Batching textured quads using BasicEffect and PrimitiveBatch

New Post: Batching textured quads using BasicEffect and PrimitiveBatch

New Post: Batching textured quads using BasicEffect and PrimitiveBatch

New Post: Batching textured quads using BasicEffect and PrimitiveBatch

New Post: Where to start