Hello,

when I try this shader I always get the message:
"invalid register t1".
What do I have to change?

Code:

---

bmap alpha_map = <leaves.tga>;

material mat_leaves
{	
	skin1 = alpha_map;

	effect
	"
		texture entSkin1;				// leave-Sprite-texture
		texture mtlSkin1;				// alpha texture
		
		technique test
		{			
			pass p0
			{
				Texture[0] = <entSkin1>;
				Texture[1] = <mtlSkin1>;
				
				TexCoordIndex[0] = 1;
				TexCoordIndex[1] = 1;
							
				vertexShader = asm
				{
					vs_1_1

					mul r0, t0, t1
				};
			
				
			}
		}
	";
}

---

That's why they invented HLSL shaders ^^
Well I can only ask what your mul instruction is supposed to do because what I can recall from the average asm register is that mul is defined like this:
Code:

---

 
mul r0,r0,r1

---

But that offcourse depends from which you use as a parameter. Is the first parameter a row or a column vector and visa versa with the second one. But it also seems you use an older syntax of assembly shader then I'm used too so maybe you could ask it or wait untill some user how are really familiar with this give their vision

Cheers

Frazzle

Thanks,
but now it says "uninitialized components in r1"

This could be caused by a bunch of reasons if we don't know what you're using the mul for Btw, were did you get this code snippet from ??

Cheers

Frazzle

I took the pixel-shader from the wiki and changed a lot of
things. So maybe everything is wrong.

Maybe you can give me a shader that does what I need:
I just want to add a alpha map to a sprite to make it
transparent. The sprite is a bmp and the alpha is a tga.

why do you not take a tga? O_ò

Well the problem is, my knowledge over assembly shaders ins't wide enough to create such a shader. Btw, do you really want to use a shader, transparency via a shader is slower qua performance then just using a simple command via c-script or even setting a flag in WED :

Code:

---

 
my.transparent = on;

---

But if the shader way is the only way for you, then I can't help you if you want it asm.

Cheers

Frazzle

Thanks.

I just wondered if I can get around this z-puffer problems.
But maybe it`s better to use overlay and transparent.