//Cg

void vshader(float4 vtx_position : POSITION,

float2 vtx_texcoord0 : TEXCOORD0,

float3 vtx_normal : NORMAL,

uniform float4x4 trans_model_to_clip_of_light,

uniform float4x4 mat_modelproj,

uniform float4 mspos_light,

uniform float4 k_ambient,

uniform float4 k_scale,

uniform float k_push,

out float4 l_position : POSITION,

out float2 l_texcoord0 : TEXCOORD0,

out float4 l_shadowcoord : TEXCOORD1,

out float l_smooth : TEXCOORD2,

out float4 l_lightclip : TEXCOORD3)

{

float4 position = vtx_position * k_scale;

// vertex position

l_position = mul(mat_modelproj, position);

// Pass through texture coordinate for main texture.

l_texcoord0 = vtx_texcoord0;

// Calculate the surface lighting factor.

l_smooth = saturate(dot(vtx_normal, normalize(mspos_light.xyz - position.xyz)));

// Calculate light-space clip position.

float4 pushed = position + float4(vtx_normal * k_push, 0);

l_lightclip = mul(trans_model_to_clip_of_light, pushed);

// Calculate shadow-map texture coordinates.

l_shadowcoord = l_lightclip * float4(0.5, 0.5, 0.5, 1.0) +

l_lightclip.w * float4(0.5, 0.5, 0.5, 0.0);

}

void fshader(in float2 l_texcoord0 : TEXCOORD0,

in float4 l_shadowcoord : TEXCOORD1,

in float l_smooth : TEXCOORD2,

in float4 l_lightclip : TEXCOORD3,

uniform sampler2D tex_0 : TEXUNIT0,

uniform sampler2DShadow k_Ldepthmap : TEXUNIT1,

uniform float4 k_ambient,

uniform float4 k_texDisable,

out float4 o_color : COLOR)

{

float3 circleoffs = float3(l_lightclip.xy / l_lightclip.w, 0);

float falloff = saturate(1.0 - dot(circleoffs, circleoffs));

float4 baseColor = saturate(tex2D(tex_0, l_texcoord0) + k_texDisable);

float shade = shadow2DProj(k_Ldepthmap, l_shadowcoord).r;

o_color = baseColor * (falloff * shade * l_smooth + k_ambient.x);

}