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uniform float Rate;
void main()
{
float angle = gl_Vertex[2];
float rate = Rate;
vec4 newPos;
newPos[0] = cos(angle* rate) * gl_Vertex[0] + sin(angle* rate) *gl_Vertex[1];
newPos[1] = -sin(angle* rate) * gl_Vertex[0] + cos(angle* rate) *gl_Vertex[1];
newPos[2] = gl_Vertex[2];
newPos[3] = gl_Vertex[3];
vec3 newNormal;
newNormal[0] = cos(angle* rate) * gl_Normal[0] + sin(angle* rate) *gl_Normal[1];
newNormal[1] = -sin(angle* rate) * gl_Normal[0] + cos(angle* rate) *gl_Normal[1];
newNormal[2] = gl_Normal[2];
vec4 ambient = gl_FrontMaterial.ambient * gl_LightSource[0].ambient;
vec3 normal = normalize(gl_NormalMatrix * newNormal);
vec3 lightDir = normalize(vec3(gl_LightSource[0].position));
float NdotL = max(dot(normal, lightDir), 0.0);
vec4 col = vec4(0,0.5,0.5,1);
vec4 diffuse = col * gl_LightSource[0].diffuse * NdotL;
vec4 specular;
if (NdotL > 0.0)
{
float NdotHV = max(dot(normal, gl_LightSource[0].halfVector.xyz), 0.0);
specular = gl_FrontMaterial.specular * gl_LightSource[0].specular *
pow(NdotHV, gl_FrontMaterial.shininess);
}
gl_FrontColor = diffuse + ambient + specular;
gl_Position = gl_ModelViewProjectionMatrix * newPos;
}
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