I am wondering if someone has a agood tutorial or an idea of how to do projected texture shader.. my attempt fails.. .. at least it only seems to work if facing one direction. This indicates to me im not using the correct projection matrix... any ideas?

Code:

---

				pass p1 
			{
				
				//load matrices
				VertexShaderConstant[0] = <matWorld>; 	//World Matrix
				VertexShaderConstant[8] = <matWorldViewProj>;	//World*View*Proj Matrix
			 
				//light vector
				VertexShaderConstant[12]  = <vecSkill41>; 
					
				//range constant
				VertexShaderConstant[33] = (0.0052f, 0.5f, 0.0f, 0.0f);
	
				Texture[0]  = <mtlSkin1>; //pointlight attenuation
		  		Texture[1]  = <mtlSkin1>;	//pointlight alpha

         	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
				AlphaBlendEnable=true; 

				srcblend=srccolor;
				destblend=one;
				VertexShader=
				decl
				{
					stream 0;
					float v0[3]; //position		
					float v3[3]; //normal
					float v7[3]; //uv
					float v8[3]; //tangent
				}
				asm
				{
					vs.1.1
					
					; position in clip space
					m4x4 oPos, v0, c8
				
					; position in world space
					m4x4 r2, v0, c0		
				
					; get light vector
					add r10, r2, -c12
					
					; 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
					
					; z-component v0
					mov oT1.x, r10.z
					
				
				};
			
				PixelShader= 
				asm
				{
					
					ps.1.1
					tex t0 
					tex t1
					
					add r0, 1-t0, -t1.a	

				};
			}  

---

update: i got it work now but only for the world view matrix.. in other words.. it projects the texture from your camera point.. now i need to make it project from an arbitrary vector.

Did you update the code in your original post? Because I am having the same problem with it.

Is this related to "projectors" as described here:

http://w1.312.telia.com/~u31225218/fc/effects.html

These project from dynamic lights.

yes thats basiaclly what i am talking about. no i didnt update the code.. just change the shader to:

Code:

---

	pass p0
			{
				
				//load matrices
				VertexShaderConstant[0] = <matWorld>; 	//World Matrix
				VertexShaderConstant[8] = <matWorldViewProj>;	//World*View*Proj Matrix
			 	VertexShaderConstant[95] = <matWorldView>;	//World*View Matrix
				//light vector
				VertexShaderConstant[12]  = <vecSkill17>; 
					
				//range constant
			//	VertexShaderConstant[33] = (0.0052f, 0.5f, 0.0f, 0.0f);
			
				VertexShaderConstant[33] = (0.01f, 0.5f, 0.0f, 0.0f);
	
				Texture[0]  = <mtlSkin3>; //pointlight attenuation
		  		Texture[1]  = <mtlSkin3>;	//pointlight alpha

         	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
				AlphaBlendEnable=false; // disables alpha blending 

				VertexShader=
				decl
				{
					stream 0;
					float v0[3]; //position		
					float v3[3]; //normal
					float v7[3]; //uv
					float v8[3]; //tangent
				}
				asm
				{
					vs.1.1
					
					; position in clip space
					m4x4 oPos, v0, c8
				
					; position in world space
					m4x4 r2, v0, c95
					
						
				
					; get light vector
				//	add r10, r2, -c12
					
					; Divide each component by the range value
				//	mul r10, r10, c33.x
					mul r10,r2,c33.x
					; multiply with 0.5 and add 0.5
					mad r10, r10, c33.yyyy, c33.yyyy
					mov oT0.xy,r10.xy
					
					; map the x and y components into the first texture
			//		mov oT0.xyz, r10.xyz
					
					; z-component v0
					mov oT1.x, r10.z
					
				
				};
			
				PixelShader= 
				asm
				{
					
					ps.1.1
					tex t0 
					tex t1
					
					add r0, 1-t0, -t1.a	
		

				};
			}  

---

now this as i said will only work using the camera as the "projector".. i still dont know the matrix math the get it work for a point light