I've looked for this and I am so sure it can be done.
Does anyone know how I can stop a texture being stretched over an oversized facet?
I remember in some game designs you would have the option of either stretching the image over the object or running a repeat.
EDIT: Okay, so I have used pixel coordinates and the issue still remains. The vertices are fine. What I am trying to do is load a bitmap and keep the size the same regardless of what the resolution is, or the size of the image. I want the image to only use 20x20 physical pixels.
I hope that makes sense because I don't think my previous explaination did.
Texture2D Texture;
SamplerState SampleType
{
Filter = TEXT_1BIT;
// AddressU = Clamp;
// AddressV = Clamp;
};
struct Vertex
{
float4 position : POSITION;
float2 tex : TEXCOORD0;
};
struct Pixel
{
float4 position : SV_POSITION;
float2 tex : TEXCOORD0;
};
Pixel FontVertexShader(Vertex input)
{
return input;
}
float4 FPS(Pixel input) : SV_Target
{
return Texture.Sample(SampleType, input.tex);
}
...
The answer is in hwnd = CreateWindow(...);
Using WS_POPUP meant I removed the borders and my texture was able to map itself correctly.
You need to use GetClientRect();
Thankyou to everyone for your help. :)
Related
I am trying to perform diffuse reflection in hlsl. Currently I am working on vertex shader. Unfortunatelly I get following error, when trying to compile with fxc.exe:
C:\Users\BBaczek\Projects\MyApp\VertexShader.vs.hlsl(2,10-25)
: error X4500: overlapping register semantics not yet implemented 'c1'
C:\Users\BBaczek\Projects\MyApp\VertexShader.vs.hlsl(2,10-25)
: error X4500: overlapping register semantics not yet implemented 'c2'
C:\Users\BBaczek\Projects\MyApp\VertexShader.vs.hlsl(2,10-25)
: error X4500: overlapping register semantics not yet implemented 'c3'
Vertex shader code:
float4x4 WorldViewProj : register(c0);
float4x4 inv_world_matrix : register(c1);
float4 LightAmbient;
float4 LightPosition;
struct VertexData
{
float4 Position : POSITION;
float4 Normal : NORMAL;
float3 UV : TEXCOORD;
};
struct VertexShaderOutput
{
float4 Position : POSITION;
float3 Color: COLOR;
};
VertexShaderOutput main(VertexData vertex)
{
VertexShaderOutput output;
vertex.Normal = normalize(vertex.Normal);
float4 newColor = LightAmbient;
vector obj_light = mul(LightPosition, inv_world_matrix);
vector LightDir = normalize(obj_light - vertex.Position);
float DiffuseAttn = max(0, dot(vertex.Normal, LightDir));
vector light = { 0.8, 0.8, 0.8, 1 };
newColor += light * DiffuseAttn;
output.Position = mul(vertex.Position, WorldViewProj);
output.Color = float3(newColor.r, newColor.g, newColor.b);
return output;
}
And command I use to perform compilation:
fxc /T vs_2_0 /O3 /Zpr /Fo VertexShader.vs VertexShader.vs.hlsl
Why am I getting this error? What can I do to prevent this?
Found it out - I am not deleting this question, because someone might find it useful.
What you need to do is changing
float4x4 WorldViewProj : register(c0);
float4x4 inv_world_matrix : register(c1);
to
float4x4 WorldViewProj : register(c0);
float4x4 inv_world_matrix : register(c4);
I am not sure what is that ok, but I assume that float4x4 is going to take more space in that buffer (4x4 - so it takes 4 places). I think that explanation is a bit silly but it works.
I have have a pixel shader that should simply pass the input color through, but instead I am getting a constant result. I think my syntax might be the problem. Here is the shader:
struct PixelShaderInput
{
float3 color : COLOR;
};
struct PixelShaderOutput
{
float4 color : SV_TARGET0;
};
PixelShaderOutput main(PixelShaderInput input)
{
PixelShaderOutput output;
output.color.rgba = float4(input.color, 1.0f); // input.color is 0.5, 0.5, 0.5; output is black
// output.color.rgba = float4(0.5f, 0.5f, 0.5f, 1); // output is gray
return output;
}
For testing, I have the vertex shader that precedes this in the pipleline passing a COLOR parameter of 0.5, 0.5, 0.5. Stepping through the pixel shader in VisualStudio, input.color has the correct values, and these are being assinged to output.color correctly. However when rendered, the vertices that use this shader are all black.
Here is the vertex shader element description:
const D3D11_INPUT_ELEMENT_DESC vertexDesc[] =
{
{ "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, D3D11_APPEND_ALIGNED_ELEMENT, D3D11_INPUT_PER_VERTEX_DATA, 0 },
{ "COLOR", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, D3D11_APPEND_ALIGNED_ELEMENT, D3D11_INPUT_PER_VERTEX_DATA, 0 },
{ "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, D3D11_APPEND_ALIGNED_ELEMENT, D3D11_INPUT_PER_VERTEX_DATA, 0 },
};
I'm not sure if it's important that the vertex shader takes colors as RGB outputs the same, but the pixel shader outputs RGBA. The alpha layer is working correctly at least.
If I comment out that first assignment, the one using input.color, and uncomment the other assignment, with the explicit values, then the rendered pixels are gray (as expected).
Any ideas on what I'm doing wrong here?
I'm using shader model 4 level 9_1, with optimizations disabled and debug info enabled.
output.color.rgba = float4(input.color, 1.0f);
your input.color is a float4 and you are passing it into another float4, i think this should work
output.color.rgba = float4(input.color.rgb, 1.0f);
this is all you need to pass it thru simply
return input.color;
if you want to change the colour to red then do something like
input.color = float4(1.0f, 0.0f, 0.0f, 1.0f);
return input.color;
*Are you sure that your vertices are in the place they are supposed to be? You are starting to make me doubt my D3D knowledge. :P
I believe your problem is that you are only passing a color,
BOTH parts of the shader NEED a position in order to work.
Your PixelShaderInput layout should be:
struct PixelShaderInput
{
float4 position :SV_POSITION;
float3 color : COLOR;
};*
Could you maybe try this as your pixel shader?:
float4 main(float3 color : COLOR) : SV_TARGET
{
return float4(color, 1.0f);
}
I have never seen this kind of constructor
float4(input.color, 1.0f);
this might be the problem, but I could be wrong. Try passing the float values one by one like this:
float4(input.color[0], input.color[1], input.color[2], 1.0f);
Edit:
Actually you might have to use float4 as type for COLOR (http://msdn.microsoft.com/en-us/library/windows/desktop/bb509647(v=vs.85).aspx)
For an academic project I'm trying to write a code for drawing billboards from scratch; now I'm at the point of making them translucent. I've managed to make them look good against the background but they still may cover each other with their should-be-transparent corners, like in this picture:
I'm not sure what I'm doing wrong. This is the effect file I'm using to draw the billboards. I've omitted the parts related to the vertex shader, which I think is irrelevant right now.
//cut
texture Texture;
texture MaskTexture;
sampler Sampler = sampler_state
{
Texture = (Texture);
MinFilter = Linear;
MagFilter = Linear;
MipFilter = Point;
AddressU = Clamp;
AddressV = Clamp;
};
sampler MaskSampler = sampler_state
{
Texture = (MaskTexture);
MinFilter = Linear;
MagFilter = Linear;
MipFilter = Point;
AddressU = Clamp;
AddressV = Clamp;
};
//cut
struct VertexShaderOutput
{
float4 Position : POSITION0;
float4 Color : COLOR;
float2 TexCoord : TEXCOORD0;
};
//cut
float4 PixelShaderFunction(VertexShaderOutput input) : COLOR0
{
float4 result = tex2D(Sampler, input.TexCoord) * input.Color;
float4 mask = tex2D(MaskSampler, input.TexCoord);
float alpha = mask.r;
result.rgb *= alpha;
result.a = alpha;
return result;
}
technique Technique1
{
pass Pass1
{
VertexShader = compile vs_2_0 VertexShaderFunction();
PixelShader = compile ps_2_0 PixelShaderFunction();
AlphaBlendEnable = true;
SrcBlend = SrcAlpha;
DestBlend = InvSrcAlpha;
}
}
I've got two textures, named Texture and MaskTexture, the latter being in grayscale. The billboards are, most likely, in the same vertex buffer and are drawn with a single call of GraphicsDevice.DrawIndexedPrimitives() from XNA.
I've got a feeling I'm not doing the whole thing right.
You have to draw them in order. From farthest to closest.
I have found a solution. The shaders are fine, the problem turned out to be in the XNA code, so sorry for drawing your attention to the wrong thing.
The solution is to enable a depth stencil buffer (whatever it is) before drawing the billboards:
device.DepthStencilState = DepthStencilState.DepthRead;
It can be disabled afterwards:
device.DepthStencilState = DepthStencilState.Default;
Background information
I have just started learning HLSL and decided to test what I have learned from the Internet by writing a simple 2D XNA 4.0 bullet-hell game.
I have written a pixel shader in order to change the color of bullets.
Here is the idea: the original texture of the bullet is mainly black, white and red. With the help of my pixel shader, bullets can be much more colorful.
But, I'm not sure how and when the shader is applied on spriteBatch in XNA 4.0, and when it ends. This may be the cause of problem.
There were pass.begin() and pass.end() in XNA 3.x, but pass.apply() in XNA 4.0 confuses me.
In addition, it is the first time for me to use renderTarget. It may cause problems.
Symptom
It works, but only if there are bullets of the same color in the bullet list.
If bullets of different colors are rendered, it produces wrong colors.
It seems that the pixel shader is not applied on the bullet texture, but applied on the renderTarget, which contains all the rendered bullets.
For an example:
Here I have some red bullets and blue bullets. The last created bullet is a blue one. It seems that the pixel shader have added blue color on the red ones, making them to be blue-violet.
If I continuously create bullets, the red bullets will appear to be switching between red and blue-violet. (I believe that the blue ones are also switching, but not obvious.)
Code
Since I am new to HLSL, I don't really know what I have to provide.
Here are all the things that I believe or don't know if they are related to the problem.
C# - Enemy bullet (or just Bullet):
protected SpriteBatch spriteBatch;
protected Texture2D texture;
protected Effect colorEffect;
protected Color bulletColor;
... // And some unrelated variables
public EnemyBullet(SpriteBatch spriteBatch, Texture2D texture, Effect colorEffect, BulletType bulletType, (and other data, like velocity)
{
this.spriteBatch = spriteBatch;
this.texture = texture;
this.colorEffect = colorEffect;
if(bulletType == BulletType.ARROW_S)
{
bulletColor = Color.Red; // The bullet will be either red
}
else
{
bulletColor = Color.Blue; // or blue.
}
}
public void Update()
{
... // Update positions and other properties, but not the color.
}
public void Draw()
{
colorEffect.Parameters["DestColor"].SetValue(bulletColor.ToVector4());
int l = colorEffect.CurrentTechnique.Passes.Count();
for (int i = 0; i < l; i++)
{
colorEffect.CurrentTechnique.Passes[i].Apply();
spriteBatch.Draw(texture, Position, sourceRectangle, Color.White, (float)Math.PI - rotation_randian, origin, Scale, SpriteEffects.None, 0.0f);
}
}
C# - Bullet manager:
private Texture2D bulletTexture;
private List<EnemyBullet> enemyBullets;
private const int ENEMY_BULLET_CAPACITY = 10000;
private RenderTarget2D bulletsRenderTarget;
private Effect colorEffect;
...
public EnemyBulletManager()
{
enemyBullets = new List<EnemyBullet>(ENEMY_BULLET_CAPACITY);
}
public void LoadContent(ContentManager content, SpriteBatch spriteBatch)
{
bulletTexture = content.Load<Texture2D>(#"Textures\arrow_red2");
bulletsRenderTarget = new RenderTarget2D(spriteBatch.GraphicsDevice, spriteBatch.GraphicsDevice.PresentationParameters.BackBufferWidth, spriteBatch.GraphicsDevice.PresentationParameters.BackBufferHeight, false, SurfaceFormat.Color, DepthFormat.None);
colorEffect = content.Load<Effect>(#"Effects\ColorTransform");
colorEffect.Parameters["ColorMap"].SetValue(bulletTexture);
}
public void Update()
{
int l = enemyBullets.Count();
for (int i = 0; i < l; i++)
{
if (enemyBullets[i].IsAlive)
{
enemyBullets[i].Update();
}
else
{
enemyBullets.RemoveAt(i);
i--;
l--;
}
}
}
// This function is called before Draw()
public void PreDraw()
{
// spriteBatch.Begin() is called outside this class, for reference:
// spriteBatch.Begin(SpriteSortMode.Immediate, null);
spriteBatch.GraphicsDevice.SetRenderTarget(bulletsRenderTarget);
spriteBatch.GraphicsDevice.Clear(Color.Transparent);
int l = enemyBullets.Count();
for (int i = 0; i < l; i++)
{
if (enemyBullets[i].IsAlive)
{
enemyBullets[i].Draw();
}
}
spriteBatch.GraphicsDevice.SetRenderTarget(null);
}
public void Draw()
{
// Before this function is called,
// GraphicsDevice.Clear(Color.Black);
// is called outside.
spriteBatch.Draw(bulletsRenderTarget, Vector2.Zero, Color.White);
// spriteBatch.End();
}
// This function will be responsible for creating new bullets.
public EnemyBullet CreateBullet(EnemyBullet.BulletType bulletType, ...)
{
EnemyBullet eb = new EnemyBullet(spriteBatch, bulletTexture, colorEffect, bulletType, ...);
enemyBullets.Add(eb);
return eb;
}
HLSL - Effects\ColorTransform.fx
float4 DestColor;
texture2D ColorMap;
sampler2D ColorMapSampler = sampler_state
{
Texture = <ColorMap>;
};
struct PixelShaderInput
{
float2 TexCoord : TEXCOORD0;
};
float4 PixelShaderFunction(PixelShaderInput input) : COLOR0
{
float4 srcRGBA = tex2D(ColorMapSampler, input.TexCoord);
float fmax = max(srcRGBA.r, max(srcRGBA.g, srcRGBA.b));
float fmin = min(srcRGBA.r, min(srcRGBA.g, srcRGBA.b));
float delta = fmax - fmin;
float4 originalDestColor = float4(1, 0, 0, 1);
float4 deltaDestColor = originalDestColor - DestColor;
float4 finalRGBA = srcRGBA - (deltaDestColor * delta);
return finalRGBA;
}
technique Technique1
{
pass ColorTransform
{
PixelShader = compile ps_2_0 PixelShaderFunction();
}
}
I would be appreciate if anyone can help solving the problem. (Or optimizing my shader. I really know very little about HLSL.)
In XNA 4 you should pass the effect directly to the SpriteBatch, as explained on Shawn Hargreaves' Blog.
That said, it seems to me like the problem is, that after rendering your bullets to bulletsRenderTarget, you then draw that RenderTarget using the same spriteBatch with the last effect still in action. That would explain why the entire image is painted blue.
A solution would be to use two Begin()/End() passes of SpriteBatch, one with the effect and the other without. Or just don't use a separate RenderTarget to begin with, which seems pointless in this case.
I'm also very much a beginner with pixel shaders so, just my 2c.
I'm using Managed Direct X 2.0 with C# and I'm attempting to apply a fragment shader to a texture built by rendering the screen to a texture using the RenderToSurface helper class.
The code I'm using to do this is:
RtsHelper.BeginScene(RenderSurface);
device.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.White, 1.0f, 0);
//pre-render shader setup
preProc.Begin(FX.None);
preProc.BeginPass(0);
//mesh drawing
mesh.DrawSubset(j);
preProc.CommitChanges();
preProc.EndPass();
preProc.End();
RtsHelper.EndScene(Filter.None);
which renders to my Surface, RenderSurface, which is attached to a Texture object called RenderTexture
Then I call the following code to render the surface to the screen, applying a second shader "PostProc" to the rendered texture. This shader combines color values on a per pixel basis and transforms the scene to grayscale. I'm following the tutorial here: http://rbwhitaker.wikidot.com/post-processing-effects
device.BeginScene();
{
using (Sprite sprite = new Sprite(device))
{
sprite.Begin(SpriteFlags.DoNotSaveState);
postProc.Begin(FX.None);
postProc.BeginPass(0);
sprite.Draw(RenderTexture, new Rectangle(0, 0, WINDOWWIDTH, WINDOWHEIGHT), new Vector3(0, 0, 0), new Vector3(0, 0, 0), Color.White);
postProc.CommitChanges();
postProc.EndPass();
postProc.End();
sprite.End();
}
}
device.EndScene();
device.Present();
this.Invalidate();
However all I see is the original rendered scene, as rendered to the texture, but unmodified by the second shader.
FX file is below in case it's important.
//------------------------------ TEXTURE PROPERTIES ----------------------------
// This is the texture that Sprite will try to set before drawing
texture ScreenTexture;
// Our sampler for the texture, which is just going to be pretty simple
sampler TextureSampler = sampler_state
{
Texture = <ScreenTexture>;
};
//------------------------ PIXEL SHADER ----------------------------------------
// This pixel shader will simply look up the color of the texture at the
// requested point, and turns it into a shade of gray
float4 PixelShaderFunction(float2 TextureCoordinate : TEXCOORD0) : COLOR0
{
float4 color = tex2D(TextureSampler, TextureCoordinate);
float value = (color.r + color.g + color.b) / 3;
color.r = value;
color.g = value;
color.b = value;
return color;
}
//-------------------------- TECHNIQUES ----------------------------------------
// This technique is pretty simple - only one pass, and only a pixel shader
technique BlackAndWhite
{
pass Pass1
{
PixelShader = compile ps_1_1 PixelShaderFunction();
}
}
Fixed it. Was using the wrong flags for the post processor shader initialization
was:
sprite.Begin(SpriteFlags.DoNotSaveState);
postProc.Begin(FX.None);
should be:
sprite.Begin(SpriteFlags.DoNotSaveState);
postProc.Begin(FX.DoNotSaveState);