//------- Constants --------float4x4 xView;float4x4 xProjection;float4x4 xWorld;float4x4 TangentMatrix;float3 xLightDirection;float xAmbient;bool xEnableLighting;float4 lightColor = float4(1,1,1,1);float3 ambientColor = float3(1,1,1);//------- Texture Samplers --------Texture xTexture1;sampler TextureSampler1 = sampler_state { texture = <xTexture1>; magfilter = LINEAR; minfilter = LINEAR; mipfilter=LINEAR; AddressU = wrap; AddressV = wrap;};Texture xNormal1;sampler NormalSampler1 = sampler_state { texture = <xNormal1>; magfilter = LINEAR; minfilter = LINEAR; mipfilter=LINEAR; AddressU = wrap; AddressV = wrap;};//------- Technique: Textured --------struct TexVertexToPixel{    float4 Position   	: POSITION0;        float4 Color		: COLOR0;    float LightingFactor: TEXCOORD0;    float2 TextureCoords: TEXCOORD1;    float3 vView        : TEXCOORD2;    float3 UP           : POSITION1;    float3 RIGHT        : POSITION2;    float3 NORMAL       : NORMAL0;};struct TexPixelToFrame{    float4 Color : COLOR0;};TexVertexToPixel TexturedVS( float4 inPos : POSITION0, float3 inNormal: NORMAL0, float4 inUp : POSITION1, float4 inRight : POSITION2 ,float2 inTexCoords: TEXCOORD0){		TexVertexToPixel Output = (TexVertexToPixel)0;	float4x4 preViewProjection = mul (xView, xProjection);	float4x4 preWorldViewProjection = mul (xWorld, preViewProjection);    	Output.Position = mul(inPos, preWorldViewProjection);		Output.TextureCoords = inTexCoords;		//enable for better light...	float3 Normal = normalize(inNormal);		Output.LightingFactor = 1;	if (xEnableLighting)		Output.LightingFactor = saturate(dot(Normal, xLightDirection));			Output.Color = float4(1.0f, 0.0f, 0.0f, 1.0f);		Output.vView = -xView[3].xyz - Output.Position;	        Matrix world2;        world2[0].x=xworld[0].x;        world2[0].y=xworld[0].y;        world2[0].z=xworld[0].z;        world2[1].x=xworld[1].x;        world2[1].y=xworld[1].y;        world2[1].z=xworld[1].z;        world2[2].x=xworld[2].x;        world2[2].y=xworld[2].y;        world2[2].z=xworld[2].z;        world2[0].w=0;                world2[1].w=0;                world2[2].w=0;                world2[3].x=0;        world2[3].y=0;        world2[3].z=0;        world2[3].w=1;            Output.UP = mul(inUp, world2);	Output.RIGHT = mul(inRight, world2);    Output.NORMAL = mul(inNormal, world2);    	return Output;     }TexPixelToFrame GDPS(TexVertexToPixel PSIn) {	TexPixelToFrame Output = (TexPixelToFrame)0;	        float3 right=normalize(PSIn.RIGHT);        float3 up=normalize(PSIn.UP);        float3 front=normalize(PSIn.NORMAL);	//float4x4 TangentMatrix;	TangentMatrix[0].x=right.x;  TangentMatrix[0].y=right.y;  TangentMatrix[0].z=right.z;   TangentMatrix[0].w=0;	TangentMatrix[1].x=up.x;     TangentMatrix[1].y=up.y;     TangentMatrix[1].z=up.z;      TangentMatrix[1].w=0;	TangentMatrix[2].x=front.x; TangentMatrix[2].y=front.y; TangentMatrix[2].z=front.z;  TangentMatrix[2].w=0;	TangentMatrix[3].x=0;             TangentMatrix[3].y=0;             TangentMatrix[3].z=0;              TangentMatrix[3].w=1;		float3 lightdir_in_tangent_space = mul(xLightDirection, TangentMatrix);	float3 nor=tex2D(NormalSampler1, float2(PSIn.TextureCoords)).rgb*2-1; 	float pixel_light=dot(lightdir_in_tangent_space, -nor);	Output.Color.rgb = tex2D(TextureSampler1, float2(PSIn.TextureCoords)).rgb;	//Output.Color *= float4(pixel_light.r,pixel_light.g,pixel_light.b, 1);	Output.Color *= pixel_light;		//Output.Color.rgb *= saturate(PSIn.LightingFactor);	Output.Color.a = 1;		return Output;}technique Textured{	pass Pass0    {       	VertexShader = compile vs_3_0 TexturedVS();        PixelShader  = compile ps_3_0 GDPS();    }}

public void CreateSphere(ref VertexPositionNormalUpRightTexture[] vpnt, ref int[] indices, int m_NumSlices, int m_NumStacks, float m_Radius)        {            int tDiv = m_NumSlices;            int pDiv = m_NumStacks;            float dt = ((float)Math.PI * 2) / tDiv;            float dp = (float)Math.PI / pDiv;             int vertex = 0;            for (int pi = 0; pi <= pDiv; pi++)            {                float phi = pi * dp;                 for (int ti = 0; ti <= tDiv; ti++)                {                    // we want to start the mesh on the x axis                    float theta = ti * dt;                     vpnt[vertex].Position = GetPosition(theta, phi, m_Radius);                    vpnt[vertex].Normal = GetNormal(theta, phi);                    vpnt[vertex].Texture = GetTextureCoordinate(theta, phi);                    vertex++;                }            }             int index = 0;            for (int pi = 0; pi < pDiv; pi++)            {                for (int ti = 0; ti < tDiv; ti++)                {                    int x0 = ti;                    int x1 = (ti + 1);                    int y0 = pi * (tDiv + 1);                    int y1 = (pi + 1) * (tDiv + 1);                     indices[index] = x0 + y0;                    indices[index + 1] = x0 + y1;                    indices[index + 2] = x1 + y0;                     indices[index + 3] = x1 + y0;                    indices[index + 4] = x0 + y1;                    indices[index + 5] = x1 + y1;                   index += 6;                }            }            for (int i = 0; i < vertex; i++)            {                Vector3.Normalize(ref vpnt.Position, out vpnt.Normal);                vpnt.Up = new Vector3(0, 1, 0);                if(acosf(Vector3.Dot(vpnt.Up,vpnt.Normal))<0.1f)                {                 vpnt.Up = new Vector3(0, 0, 1);                }                if(acosf(Vector3.Dot(-vpnt.Up,vpnt.Normal))<0.1f)                {                 vpnt.Up = new Vector3(0, 0, 1);                }                Vector3 cross = Vector3.Cross(vpnt.Normal, vpnt.Up);                Vector3.Normalize(ref cross, out vpnt.Right);                vpnt.Up = Vector3.Cross(vpnt.Normal, vpnt.Right);            }        }