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Christoffer Enne

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About Christoffer Enne

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  1. From the album Project Orbis Nova

    This is a model I been working on for 2 days and its almost complete. Now I just need to edit the ribs some more and then rigg it.

    © Christoffer Enne

  2. When i found out that XNA was no longer supposed to be updated I started looking around for alternatives. After months of searching I tested Unity3D and I must say that that is the best software I have ever played with. Its not XNA like but if you used XNA because of its simplicity I strongly recommend Unity. And Microsoft have announced that they will be supporting unity and unity will be able to make metro apps with xbox live. So basically Unity is going to be the replacement for XNA.
  3. Unity

    Hi.   Im currently trying to update my terrain engine to use water flow and erosion simulation in realtime. I found this exelent example of it here:    http://codeflow.org/entries/2011/nov/10/webgl-gpu-landscaping-and-erosion/   However I cant seme to recreate it in unity 3D. The description is a bit confusing. I have tried everything but cant get it to work. The source code is a bit confusing as well so I have had no luck with that either.   Could someone who might understand be kind to help me figure out the algoritm or explain it?
  4. Well actually my terrain is dynamic and it is and made to change each frame. Right now every chunk is stored in byte files and loaded on the go as i need them. But I thought that creating it from a texture could help me to get the right light without doing calculations on the cpu or doing multiple passes as the light is depending on the terrain cells neibours.
  5. I resently read about geometry shaders but I only found examples where you pass vertex data to the GS and then create new geometry. I was thinking is it possible to not give the geometry shader any vertrices and have it create new ones by reading a texture? So that the only thing I have to do is give the shader a texture and out comes some nice looking terrain. If there is? Is there any tutorials or something where I can read about it?
  6. Yes it worked!!! Thank you guys so mutch! I did this: [CODE] static class Constants { public const int D3DSTREAMSOURCE_INDEXEDDATA = (1 << 30); public const int D3DSTREAMSOURCE_INSTANCEDATA = (2<<30); } [/CODE] and used them like this: [CODE] _device.SetStreamSourceFrequency(0, Constants.D3DSTREAMSOURCE_INDEXEDDATA | _instanceCount); _device.SetStreamSourceFrequency(1, Constants.D3DSTREAMSOURCE_INSTANCEDATA | 1); [/CODE]
  7. I have done Instancing in xna and I dont remember using them and I have seen a few examples where those are used but I cant access them.
  8. David w: I don't really have the need of a matrix because there is no scaling and rotation done to the model. I only want to place it on different coordinates and thats why I only input a vector3. kauna: Well my program does not recognise D3DSTREAMSOURCE_INDEXDATA or D3DSTREAMSOURCE_INSTANCEDATA. What reference and using do I need for this?
  9. Hi This is my first post on this site. I used to be at App Hub but I resently started working directly to DirectX and the DirectX activity there is close to none thats why I joined here so that I might have someone to talk to. But enoght about that and on to my question. For a few days I have tried to get hardware instancing to work but with no luck. I have googled a lot and read everything on the topic that I can find. Everything compiles and It draws one of the instances where only one of the vertrices are affected by the world coordinate. I'm at the point where I want to throw the computer out the window so please have a look at this and help me if you can! Here is the instancing parts of my code. private int _instanceCount; private InstanceFormat[] _instances; private VertexBuffer _instanceBuffer; private int _vertexCount; private VertexFormat[] _vertices; private VertexBuffer _vertexBuffer; private int _indexCount; private uint[] _indices; private IndexBuffer _indexBuffer; private D3D.Effect _instancingEffect; private VertexDeclaration _vertexDeclaration; int vertexSize; int instanceSize; struct VertexFormat { public Vector3 Position; public Vector2 Texture; public VertexFormat(Vector3 position, Vector2 texture) { Position = position; Texture = texture; } } struct InstanceFormat { public Vector3 World; public InstanceFormat(Vector3 world) { World = world; } } This is where I create my Declaration and fill the buffers: #region Set up vertex declaration vertexSize = 20; instanceSize = 12; VertexElement[] vertexElementsArray = new VertexElement[] { new VertexElement(0, 0, DeclarationType.Float3, DeclarationMethod.Default, DeclarationUsage.Position, 0), new VertexElement(0, 12, DeclarationType.Float2, DeclarationMethod.Default, DeclarationUsage.TextureCoordinate, 0), new VertexElement(1, 0, DeclarationType.Float4, DeclarationMethod.Default, DeclarationUsage.TextureCoordinate, 1), VertexElement.VertexDeclarationEnd }; // Create a vertex declaration based on the vertex elements. _vertexDeclaration = new VertexDeclaration(_device, vertexElementsArray); #endregion #region Set up vertex buffer for vertices _vertexCount = 4; _vertexBuffer = new VertexBuffer(_device, vertexSize*_vertexCount, Usage.Dynamic | Usage.WriteOnly, VertexFormats.Position | VertexFormats.Texture0, Pool.Default); _vertices = new VertexFormat[_vertexCount]; _vertices[0] = new VertexFormat(new Vector3(0, 0, 0), new Vector2(0, 0)); _vertices[1] = new VertexFormat(new Vector3(0, 1, 0), new Vector2(0, 1)); _vertices[2] = new VertexFormat(new Vector3(1, 0, 0), new Vector2(1, 0)); _vertices[3] = new VertexFormat(new Vector3(1, 1, 0), new Vector2(1, 1)); _vertexBuffer.SetData(_vertices, 0, LockFlags.None); #endregion #region Set up index buffer _indexCount = 6; _indexBuffer = new IndexBuffer(_device, sizeof(uint)*_indexCount, Usage.WriteOnly, Pool.Default, false); _indices = new uint[_indexCount]; _indices[0] = 0; _indices[1] = 1; _indices[2] = 2; _indices[3] = 1; _indices[4] = 3; _indices[5] = 2; _indexBuffer.SetData(_indices, 0, LockFlags.None); #endregion #region Set up vertex buffer for instances _instanceCount = 10; _instanceBuffer = new VertexBuffer(_device, instanceSize * _instanceCount, Usage.Dynamic | Usage.WriteOnly, VertexFormats.None, Pool.Default); _instances = new InstanceFormat[_instanceCount]; for (int i = 0; i < _instanceCount; i++) _instances[i] = new InstanceFormat(new Vector3(i, 0, i)); _instanceBuffer.SetData(_instances, 0, LockFlags.None); #endregion And this is my draw method: _device.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.DarkSlateBlue, 1.0f, 0); _device.BeginScene(); _device.VertexDeclaration = _vertexDeclaration; _device.Indices = _indexBuffer; _device.SetStreamSource(0, _vertexBuffer, 0, vertexSize); _device.SetStreamSource(1, _instanceBuffer, 0, instanceSize); // Specify how many times the vertex stream source and the instance stream source should be rendered. _device.SetStreamSourceFrequency(0, _instanceCount); _device.SetStreamSourceFrequency(1, 1); _instancingEffect.Technique = "Instancing"; _instancingEffect.SetValue("WVP", _camera.view * _camera.projection); _instancingEffect.SetValue("cubeTexture", _textures[1]); int numpasses = _instancingEffect.Begin(0); for (int i = 0; i < numpasses; i++) { _instancingEffect.BeginPass(i); _device.DrawIndexedPrimitives(PrimitiveType.TriangleList, 0, 0, _vertexCount, 0, _indexCount / 3); _instancingEffect.EndPass(); } _instancingEffect.End(); _device.SetStreamSourceFrequency(0, 1); _device.SetStreamSourceFrequency(1, 1); _device.EndScene(); _device.Present(); And here is my shader: float4x4 WVP; texture cubeTexture; sampler TextureSampler = sampler_state { texture = <cubeTexture>; mipfilter = LINEAR; minfilter = LINEAR; magfilter = LINEAR; }; struct InstancingVSinput { float4 Position : POSITION0; float2 TexCoord : TEXCOORD0; float4 World : TEXCOORD1; }; struct InstancingVSoutput { float4 Position : POSITION0; float2 TexCoord : TEXCOORD0; }; InstancingVSoutput InstancingVS(InstancingVSinput input) { InstancingVSoutput output; // Transform the vertex into world coordinates. float4 pos = input.Position + input.World; // Transform the vertex from world coordinates into screen coordinates. output.Position = mul(pos, WVP); output.TexCoord = input.TexCoord; return output; } float4 InstancingPS(InstancingVSoutput input) : COLOR0 { return float4(1,1,1,1);// tex2D(TextureSampler, input.TexCoord); } technique Instancing { pass Pass0 { VertexShader = compile vs_3_0 InstancingVS(); PixelShader = compile ps_3_0 InstancingPS(); } } Edit: I should probably mention that I have a Radeon HD 5770.