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const int MAX_LIGHTS = 8;
const int TYPE_POINT = 0;
const int TYPE_DIRECTIONAL = 1;
const int TYPE_SPOT = 2;
struct Light {
int type;
vec3 position;
vec3 color;
float intensity;
vec3 direction;
vec3 attenuation;
float cutOffAngle;
};
uniform Light lights[MAX_LIGHTS];
uniform int lightCount;
void adsModelNormalMapped(const in vec3 vpos, const in vec3 vnormal, const in vec3 eye, const in float shininess,
const in mat3 tangentMatrix,
out vec3 diffuseColor, out vec3 specularColor)
{
diffuseColor = vec3(0.0);
specularColor = vec3(0.0);
vec3 n = normalize( vnormal );
int i;
vec3 s;
for (i = 0; i < lightCount; ++i) {
float att = 1.0;
if ( lights[i].type != TYPE_DIRECTIONAL ) {
s = tangentMatrix * ( lights[i].position - vpos );
if (length( lights[i].attenuation ) != 0.0) {
float dist = length(s);
att = 1.0 / (lights[i].attenuation.x + lights[i].attenuation.y * dist + lights[i].attenuation.z * dist * dist);
}
s = normalize( s );
if ( lights[i].type == TYPE_SPOT ) {
if ( degrees(acos(dot(-s, normalize(lights[i].direction))) ) > lights[i].cutOffAngle)
att = 0.0;
}
} else {
s = normalize( tangentMatrix * -lights[i].direction );
}
float diffuse = max( dot( s, n ), 0.0 );
float specular = 0.0;
if (diffuse > 0.0 && shininess > 0.0 && att > 0.0) {
vec3 r = reflect( -s, n );
vec3 v = normalize( tangentMatrix * ( eye - vpos ) );
float normFactor = ( shininess + 2.0 ) / 2.0;
specular = normFactor * pow( max( dot( r, v ), 0.0 ), shininess );
}
diffuseColor += att * lights[i].intensity * diffuse * lights[i].color;
specularColor += att * lights[i].intensity * specular * lights[i].color;
}
}
void adsModel(const in vec3 vpos, const in vec3 vnormal, const in vec3 eye, const in float shininess,
out vec3 diffuseColor, out vec3 specularColor)
{
diffuseColor = vec3(0.0);
specularColor = vec3(0.0);
vec3 n = normalize( vnormal );
int i;
vec3 s;
for (i = 0; i < lightCount; ++i) {
float att = 1.0;
if ( lights[i].type != TYPE_DIRECTIONAL ) {
s = lights[i].position - vpos;
if (length( lights[i].attenuation ) != 0.0) {
float dist = length(s);
att = 1.0 / (lights[i].attenuation.x + lights[i].attenuation.y * dist + lights[i].attenuation.z * dist * dist);
}
s = normalize( s );
if ( lights[i].type == TYPE_SPOT ) {
if ( degrees(acos(dot(-s, normalize(lights[i].direction))) ) > lights[i].cutOffAngle)
att = 0.0;
}
} else {
s = normalize( -lights[i].direction );
}
float diffuse = max( dot( s, n ), 0.0 );
float specular = 0.0;
if (diffuse > 0.0 && shininess > 0.0 && att > 0.0) {
vec3 r = reflect( -s, n );
vec3 v = normalize( eye - vpos );
float normFactor = ( shininess + 2.0 ) / 2.0;
specular = normFactor * pow( max( dot( r, v ), 0.0 ), shininess );
}
diffuseColor += att * lights[i].intensity * diffuse * lights[i].color;
specularColor += att * lights[i].intensity * specular * lights[i].color;
}
}
void adModel(const in vec3 vpos, const in vec3 vnormal, out vec3 diffuseColor)
{
diffuseColor = vec3(0.0);
vec3 n = normalize( vnormal );
int i;
vec3 s;
for (i = 0; i < lightCount; ++i) {
float att = 1.0;
if ( lights[i].type != TYPE_DIRECTIONAL ) {
s = lights[i].position - vpos;
if (length( lights[i].attenuation ) != 0.0) {
float dist = length(s);
att = 1.0 / (lights[i].attenuation.x + lights[i].attenuation.y * dist + lights[i].attenuation.z * dist * dist);
}
s = normalize( s );
if ( lights[i].type == TYPE_SPOT ) {
if ( degrees(acos(dot(-s, normalize(lights[i].direction))) ) > lights[i].cutOffAngle)
att = 0.0;
}
} else {
s = normalize( -lights[i].direction );
}
float diffuse = max( dot( s, n ), 0.0 );
diffuseColor += att * lights[i].intensity * diffuse * lights[i].color;
}
}
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