Texture projector

From GameStudio Wiki

texture mtlSkin1; //projector
texture entSkin1; //colormap
matrix matWorldViewProj;
matrix matWorld;
matrix matMtl;

technique projector {
	pass p0 {
	//load matrices
	VertexShaderConstant~[0] = <matWorld>; //World Matrix
	VertexShaderConstant~[8] = <matWorldViewProj>;
	VertexShaderConstant~[95] = <matMtl>;
	//range constant
	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
	};
	}
}