Ok.. let me see. I stored my shader in a .fx file. Here is the assignment in my code:

Code:

---

bmap pSkin = <projector_sprite.pcx>;

material matProjector
{
	skin1 = pSkin;  
	effect = "projector.fx";
}

action actProjector
{
	my.material = matProjector;
}

---

And this is my .fx file. This is a copy and paste of the shader of the Wiki. The first skin of the cube which I use as projector is identical to the PCX file I declare in the material settings.. I wondered why there are two skins used.. well this is the code:

Code:

---

texture mtlSkin1;
texture entSkin1;

matrix matWorldViewProj;
matrix matWorld;
matrix matMtl;

technique projector {
	pass p0 {

	VertexShaderConstant[0] = <matWorld>; //World Matrix
	VertexShaderConstant[8] = <matWorldViewProj>;
	VertexShaderConstant[95] = <matMtl>;

	VertexShaderConstant[33] = {0.01f, 0.5f, 0.05f, 0.0f};

	Texture[0] = <mtlSkin1>; //projection tex
	Texture[1] = <entSkin1>; //projection tex
	AddressU[0] = Clamp; // don't wrap around edges
	AddressV[0] = Clamp;
	AddressU[1] = Clamp; // don't wrap around edges
	AddressV[1] = Clamp;
	zWriteEnable=true; // enables writing to the z-buffer

	VertexShader=
	asm {
		vs_1_1
		dcl_position v0
		dcl_normal v3
		dcl_texcoord0 v7
		dcl_texcoord1 v8
		; position in clip space
		m4x4 oPos, v0, c8
		; position in texture projection space
		m4x4 r10,v0,c95
		; Divide each component by the range value
		mul r10, r10, c33.x
		; multiply with 0.5 and add 0.5
		mad r10, r10, c33.yyyy, c33.yyyy
		; map the x and y components into the first texture
		mov oT0.xy, r10.xy
		mov oT1.xy, v7.xy; color
	};

	PixelShader=
	asm {
		ps_1_1
		tex t0
		tex t1
		mov r0,t0
		mul r0,r0,t1
	};
	}
}

---

Dont blame me for the copy and paste - I suspected that it doesnt work.

Well.. I dont know much about shaders and when I tried to get information about that VertexShaderConstant array, which I dont understand because later there is no reference to it for calculations, I didnt found anything useful or explaining on the MSDN. The ASM part is mostly not understandable for me.

In my test environment my model cube - which is the projector - is surrounded only by MDLs. When I run it, the cube has no shading at all, but you can see the texture. No projected sprite anywhere.

I don't beg that anyone explains me everything - but in the case of shaders I still need some help. AND I bought a book about it.. but the learning curve isnt that fast.

ciao
Christian