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/**
* @file
* @brief Atmosphere vertex shader
*/
out_qualifier vec2 tex;
out_qualifier vec4 ambientLight;
out_qualifier vec4 diffuseLight;
out_qualifier vec4 specularLight;
out_qualifier vec3 lightVec;
out_qualifier vec3 eyeVec;
uniform vec2 UVSCALE;
void main() {
gl_Position = ftransform();
tex = gl_MultiTexCoord0.xy * UVSCALE;
vec4 lightPos = gl_LightSource[0].position;
ambientLight = gl_LightSource[0].ambient;
diffuseLight = gl_LightSource[0].diffuse;
specularLight = gl_LightSource[0].specular;
vec3 t, b, n;
n = normalize(gl_NormalMatrix * gl_Normal);
t = normalize(cross(n, vec3(1.0, 0.0, 0.0)));
b = normalize(cross(t, n));
lightVec.x = dot(lightPos.rgb, t);
lightVec.y = dot(lightPos.rgb, b);
lightVec.z = dot(lightPos.rgb, n);
/* estimate view vector (orthographic projection means we don't really have one) */
vec4 view = vec4(0.0, 0.0, 100.0, 1.0);
eyeVec.x = dot(view.xyz, t);
eyeVec.y = dot(view.xyz, b);
eyeVec.z = dot(view.xyz, n);
}
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