HLSL Shader

float4x4 World;
	float4x4 View;
	float4x4 Projection;

	float4	LightAmbient;

	float4	LightDiffuse0;
	float3	LightDir0;

	texture hm;//heighmap
	float mh = 64;//maximum heigh

	sampler hms = sampler_state{      //this sampler will be used to read (sample) the heightmap
			Texture = <hm>;
			MipFilter = Point;
			MinFilter = Point;
			MagFilter = Point;
			AddressU = Clamp;
			AddressV = Clamp;
	};

	struct VertexShaderInput
	{
		float4 Position : POSITION0;
		float4 uv : TEXCOORD0;
	};

	struct VertexShaderOutput
	{
		float4 Position : POSITION0;
		float3 Normal : TEXCOORD0;
	};

	VertexShaderOutput VertexShaderFunction(VertexShaderInput input, float3 Normal : NORMAL)
	{
		VertexShaderOutput output;
		float height = tex2Dlod ( hms, float4(input.uv.xy , 0 , 0 ) );
		input.Position.y = height * -mh;
		float4 worldPosition = mul(input.Position, World);
		float4 viewPosition = mul(worldPosition, View);
		output.Position = mul(viewPosition, Projection);
		//I need somehow recalculate normals here
		float3 normal = normalize(mul(Normal, World));
		output.Normal = normal;

		return output;
	}

	float4 PixelShaderFunction(VertexShaderOutput input) : COLOR0
	{
		float4 norm = float4(Normal, 1.0);
		float4 diffuse0 = saturate(dot(-LightDir0 ,norm));
		return LightAmbient*0.7 + LightDiffuse0 * diffuse0;
	}

	technique T1
	{
		pass Pass1
		{
			VertexShader = compile vs_3_0 VertexShaderFunction();
			PixelShader = compile ps_3_0 PixelShaderFunction();
		}
	}