1 files changed, 131 insertions, 0 deletions
diff --git a/src/extras/shaders/es2/light.inc.frag b/src/extras/shaders/es2/light.inc.frag
new file mode 100644
index 000000000..cdec536cf
--- /dev/null
+++ b/src/extras/shaders/es2/light.inc.frag
@@ -0,0 +1,131 @@
+const int MAX_LIGHTS = 8;
+const int TYPE_POINT = 0;
+const int TYPE_DIRECTIONAL = 1;
+const int TYPE_SPOT = 2;
+struct Light {
+    int type;
+    FP vec3 position;
+    FP vec3 color;
+    FP float intensity;
+    FP vec3 direction;
+    FP vec3 attenuation;
+    FP float cutOffAngle;
+};
+uniform Light lights[MAX_LIGHTS];
+uniform int lightCount;
+
+void adsModelNormalMapped(const in FP vec3 vpos, const in FP vec3 vnormal, const in FP vec3 eye, const in FP float shininess,
+                          const in FP mat3 tangentMatrix,
+                          out FP vec3 diffuseColor, out FP vec3 specularColor)
+{
+    diffuseColor = vec3(0.0);
+    specularColor = vec3(0.0);
+
+    FP vec3 n = normalize( vnormal );
+
+    int i;
+    FP vec3 s;
+    for (i = 0; i < lightCount; ++i) {
+        FP float att = 1.0;
+        if ( lights[i].type != TYPE_DIRECTIONAL ) {
+            s = tangentMatrix * ( lights[i].position - vpos );
+            if (length( lights[i].attenuation ) != 0.0) {
+                FP 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 );
+        }
+
+        FP float diffuse = max( dot( s, n ), 0.0 );
+
+        FP float specular = 0.0;
+        if (diffuse > 0.0 && shininess > 0.0 && att > 0.0) {
+            FP vec3 r = reflect( -s, n );
+            FP vec3 v = normalize( tangentMatrix * ( eye - vpos ) );
+            FP 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 FP vec3 vpos, const in FP vec3 vnormal, const in FP vec3 eye, const in FP float shininess,
+              out FP vec3 diffuseColor, out FP vec3 specularColor)
+{
+    diffuseColor = vec3(0.0);
+    specularColor = vec3(0.0);
+
+    FP vec3 n = normalize( vnormal );
+
+    int i;
+    FP vec3 s;
+    for (i = 0; i < lightCount; ++i) {
+        FP float att = 1.0;
+        if ( lights[i].type != TYPE_DIRECTIONAL ) {
+            s = lights[i].position - vpos;
+            if (length( lights[i].attenuation ) != 0.0) {
+                FP 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 );
+        }
+
+        FP float diffuse = max( dot( s, n ), 0.0 );
+
+        FP float specular = 0.0;
+        if (diffuse > 0.0 && shininess > 0.0 && att > 0.0) {
+            FP vec3 r = reflect( -s, n );
+            FP vec3 v = normalize( eye - vpos );
+            FP 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 FP vec3 vpos, const in FP vec3 vnormal, out FP vec3 diffuseColor)
+{
+    diffuseColor = vec3(0.0);
+
+    FP vec3 n = normalize( vnormal );
+
+    int i;
+    FP vec3 s;
+    for (i = 0; i < lightCount; ++i) {
+        FP float att = 1.0;
+        if ( lights[i].type != TYPE_DIRECTIONAL ) {
+            s = lights[i].position - vpos;
+            if (length( lights[i].attenuation ) != 0.0) {
+                FP 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 );
+        }
+
+        FP float diffuse = max( dot( s, n ), 0.0 );
+
+        diffuseColor += att * lights[i].intensity * diffuse * lights[i].color;
+    }
+}