Hi peoples,
how do I use more than one shader?
example: I have shader (many HLSL) shadow, light, blur effect, normal mapping etc.
and how can i use all in one model?
how do I use more than one shader?
1/ It depends on how you've organised your shaders.
Is it 1 shader .fx file with many HLSL techniques or is it many fx files with 1 tech in each?
2/ Once you know what organisation you want, then you have to decide what shader to use on your model and when.
Things to look for:
- is it an opaque model or does it have alpha?
- are you rendering front-to-back or the opposite?
- is model made of composite material or singular ones?
- are you permanently shading your model with all these techniques or is just to react to a game state (bullet hit or else)?
- etc...
3/ are you using dx9,dx10,dx11,ogl,sdl or what?
4/ also, are you rendering from a vertex cache manager or not? (which you should have)
G'luck.
Is it 1 shader .fx file with many HLSL techniques or is it many fx files with 1 tech in each?
2/ Once you know what organisation you want, then you have to decide what shader to use on your model and when.
Things to look for:
- is it an opaque model or does it have alpha?
- are you rendering front-to-back or the opposite?
- is model made of composite material or singular ones?
- are you permanently shading your model with all these techniques or is just to react to a game state (bullet hit or else)?
- etc...
3/ are you using dx9,dx10,dx11,ogl,sdl or what?
4/ also, are you rendering from a vertex cache manager or not? (which you should have)
G'luck.
Author
Hi G'luck, i have many fx shaders HLSL (1 light.fx, 2 blur.fx, 3 bump mapping.fx )
my models is opaque,
i'm using DX9 and C++
vertex cache manager ? no
my models is opaque,
i'm using DX9 and C++
vertex cache manager ? no
It doesn't matter how much shader you have. The graphics pipeline have a fix amount of stages and each programmable stage can have only one shader attach to it at a time. Make perfect sense seeing that having two vertex shaders for the same vertex make no sense. As such, for each pass you can have only 1 vertex shade active, 1 fragment shader active and one shader for each of the additional programmable pipeline stages.
Author
Excuse me guys, but I want to know:
i have the models: ground, house and a tree
i want render it with shader.
Example:
configAllEfect(); //config all effect (texture, matrix, etc..)
BlurEffect->begin();
LightEffect->begin();
BMEffect->begin();
groundMeshX->drawSubSet(0);
houseMeshX->drawSubSet(0);
treeMeshX->drawSubSet(0);
BlurEffect->end();
LightEffect->end();
BMEffect->end();
how ?
i have the models: ground, house and a tree
i want render it with shader.
Example:
configAllEfect(); //config all effect (texture, matrix, etc..)
BlurEffect->begin();
LightEffect->begin();
BMEffect->begin();
groundMeshX->drawSubSet(0);
houseMeshX->drawSubSet(0);
treeMeshX->drawSubSet(0);
BlurEffect->end();
LightEffect->end();
BMEffect->end();
how ?
As cgrant said, you can only have one vertex/pixel shader at one time.
Since you're using effects, you can only use one effect at a time.
If you want multiple effects, you have to combine them yourself into one shader.
BTW, what does your BlurEffect do? Blur is normally an effect that needs post-processing. That means, you cannot use that shader to render a blurred image in one pass. You first have to render to a rendertarget (a special type of texture), then you can take that image and render it to the screen, using your blur shader.
Since you're using effects, you can only use one effect at a time.
If you want multiple effects, you have to combine them yourself into one shader.
BTW, what does your BlurEffect do? Blur is normally an effect that needs post-processing. That means, you cannot use that shader to render a blurred image in one pass. You first have to render to a rendertarget (a special type of texture), then you can take that image and render it to the screen, using your blur shader.
Author
Quote:Original post by Tubos
BTW, what does your BlurEffect do?
nothing, i just quoted as an example :D.
Quote:Original post by Tubos
If you want multiple effects, you have to combine them yourself into one shader.
how ?
Quote:
how ?
By authoring them as composed effects. If you used to have EffectA and EffectB, you instead write one EffectC that does what EffectA and EffectB both did.
Author
Quote:Original post by jpetrieQuote:
how ?
By authoring them as composed effects. If you used to have EffectA and EffectB, you instead write one EffectC that does what EffectA and EffectB both did.
sorry, i dont understand, have a example code ?
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