material grass {
	flags = tangent;
	effect
	"
		texture entSkin1;
		
		matrix matWorldViewProj;
		matrix matWorldView;
		
		vector vecFog;
		vector vecTime;
		
		technique tree
		{
			pass p0
			{
				texture[0]=<entSkin1>;
				zWriteEnable=true;
				alphaTestEnable=true;
				cullMode=none;
		
				vertexShaderConstant[0]=<matWorldViewProj>;
				vertexShaderConstant[8]=<matWorldView>;
				vertexShaderConstant[16]=<vecFog>;
				vertexShaderConstant[32]=<vecTime>;
				vertexShaderConstant[33]={0.0f,0.5f,1.0f,2.0f};										// common constants
				vertexShaderConstant[34]={-0.16161616f,0.0083333f,-0.00019841f,0.000002755731f};	// {-1/3!,1/5!,-1/7!,1/9!}
				vertexShaderConstant[35]={4.0f,1.57079632f,3.14159265f,6.28318530f};				// {4.0,pi/2,pi,pi*2}
				vertexShaderConstant[36]={1.07f,0.0f,0.0f,0.0f};									// fixup factor
		
				vertexShaderConstant[40]={2.5f,1.0f,0.5f,0.1f};										// wave distort x
				vertexShaderConstant[41]={1.0f,1.5f,1.25f,0.1f};									// wave distort y
				vertexShaderConstant[42]={-1.0f,-1.01f,-1.04f,-0.01f};								// wave distort z
				vertexShaderConstant[43]={-0.1f,-0.2f,0.1f,0.05f};									// wave dir x
				vertexShaderConstant[44]={-0.005f,-0.01f,-0.005f,-0.0025f};							// wave dir y
				//vertexShaderConstant[45]={0.02f,0.04f,0.05f,0.1f};									// wave speed
				vertexShaderConstant[45]={0.005f,0.01f,0.01f,0.1f};									// wave speed
				vertexShaderConstant[46]={0.35f,0.1f,0.1f,0.04f};									// lighting wave scale
				vertexShaderConstant[47]={0.6f,0.8f,0.3f,0.0f};										// lighting scale bias
		
				vertexShader=
				asm
				{
					vs.1.1
		
					dcl_position  v0
					dcl_normal    v3
					dcl_texcoord0 v7
					dcl_texcoord1 v8
		
					mov r1.w,c16.w                  // r1.w=1
					dp4 r0,v0,c10                   // distance to camera position (v0 is the position without sinusodial warping!)
					add r0,r0,-c16.x                // distance-fog_start
					mad r0.x,-r0.x,c16.z,r1.w       // 1-(distance-fog_start)*(1/(fog_end-fog_start))
					max oFog,r0.x,c33.x           // clamp with custom max value
		
					mul r0,c43,v0.x                 // use vertex pos x as inputs to sinusoidal warp
					mad r0,c44,v0.y,r0              // use vertex pos y as inputs to sinusoidal warp
		
					mov r1,c32.w                    // get current time
					mad r0,r1,c45,r0                // add scaled time
					frc r0.xy,r0                    // take fraction of all 4 components
					frc r1.xy,r0.zwzw
					mov r0.zw,r1.xyxy
		
					mul r0,r0,c36.x                 // multiply by fixup factor (due to inaccuracy of taylor series)
					sub r0,r0,c33.y                 // subtract 0.5
					mul r1,r0,c35.w                 // range -pi to pi
		
					mul r2,r1,r1                    // wave_vec^2
					mul r3,r2,r1                    // wave_vec^3
					mul r5,r3,r2                    // wave_vec^5
					mul r7,r5,r2                    // wave_vec^7
					mul r9,r7,r2                    // wave_vec^9
		
					mad r0,r3,c34.x,r1              // wave_vec-(wave_vec^3)/3!
					mad r0,r5,c34.y,r0              // +(wave_vec^5)/5!
					mad r0,r7,c34.z,r0              // -(wave_vec^7)/7!
					mad r0,r9,c34.w,r0              // +(wave_vec^9)/9!
		
					dp4 r3.x,r0,c40
					dp4 r3.y,r0,c41
					dp4 r3.zw,r0,c42
		
					sub r4,c33.z,v7.y               // attenuate sinusoidal warping by (1-uv.y)^2
					mul r4,r4,r4
					mul r3,r3,r4
		
					mov r2.w,v0
					add r2.xyz,r3,v0                // add sinusoidal warping to grass position
					m4x4 oPos,r2,c0                 // transform position to clip space
		
					dp4 r1.x,r0,c46                 // scale and add sin waves together
					mad oD0,c47.xzxz,-r1.x,c47.y    // scale and bias color values (green is scaled more than red and blue)
					mov oT0.xy,v7.xy                // output uvs
				};
		
				pixelShader=
				asm
				{
					ps.1.3
					def c0,1,1,1,1
					def c1,0,0,0,0
					tex t0                  // sample t0
					mov r0,t0
					cnd r0.a,r0.a,c0,c1     // if(r0.a>0.5){r0.a=1;}else{r0.a=0;}
					//mul_x2 r0.rgb,r0,v0     // modulate with lighting
				};
			}
		}


	";
}