Updated standard shader

Corrects weird artifacts on web

examples/resources/shaders/glsl100/standard.fs

@@ -38,7 +38,6 @@ uniform Light lights[maxLights];
 
 vec3 ComputeLightPoint(Light l, vec3 n, vec3 v, float s)
 {
-/*
     vec3 surfacePos = vec3(modelMatrix*vec4(fragPosition, 1.0));
     vec3 surfaceToLight = l.position - surfacePos;
     
@@ -51,17 +50,14 @@ vec3 ComputeLightPoint(Light l, vec3 n, vec3 v, float s)
     if (diff > 0.0)
     {
         vec3 h = normalize(-l.direction + v);
-        spec = pow(dot(n, h), 3.0 + glossiness)*s;
+        spec = pow(abs(dot(n, h)), 3.0 + glossiness)*s;
     }
     
     return (diff*l.diffuse.rgb + spec*colSpecular.rgb);
-*/
-    return vec3(0.5);
 }
 
 vec3 ComputeLightDirectional(Light l, vec3 n, vec3 v, float s)
 {
-/*
     vec3 lightDir = normalize(-l.direction);
     
     // Diffuse shading
@@ -72,18 +68,15 @@ vec3 ComputeLightDirectional(Light l, vec3 n, vec3 v, float s)
     if (diff > 0.0)
     {
         vec3 h = normalize(lightDir + v);
-        spec = pow(dot(n, h), 3.0 + glossiness)*s;
+        spec = pow(abs(dot(n, h)), 3.0 + glossiness)*s;
     }
     
     // Combine results
     return (diff*l.intensity*l.diffuse.rgb + spec*colSpecular.rgb);
-*/
-    return vec3(0.5);
 }
 
 vec3 ComputeLightSpot(Light l, vec3 n, vec3 v, float s)
 {
-/*
     vec3 surfacePos = vec3(modelMatrix*vec4(fragPosition, 1));
     vec3 lightToSurface = normalize(surfacePos - l.position);
     vec3 lightDir = normalize(-l.direction);
@@ -108,12 +101,10 @@ vec3 ComputeLightSpot(Light l, vec3 n, vec3 v, float s)
     if (diffAttenuation > 0.0)
     {
         vec3 h = normalize(lightDir + v);
-        spec = pow(dot(n, h), 3.0 + glossiness)*s;
+        spec = pow(abs(dot(n, h)), 3.0 + glossiness)*s;
     }
     
     return (falloff*(diffAttenuation*l.diffuse.rgb + spec*colSpecular.rgb));
-*/
-    return vec3(0.5);
 }
 
 void main()
@@ -140,7 +131,7 @@ void main()
     
     // Calculate specular texture color fetching or set to maximum specular value by default
     float spec = 1.0;
-    if (useSpecular == 1) spec *= normalize(texture2D(texture2, fragTexCoord).r);
+    if (useSpecular == 1) spec = texture2D(texture2, fragTexCoord).r;
     
     for (int i = 0; i < maxLights; i++)
     {

examples/resources/shaders/glsl330/standard.fs

@@ -50,7 +50,7 @@ vec3 ComputeLightPoint(Light l, vec3 n, vec3 v, float s)
     if (diff > 0.0)
     {
         vec3 h = normalize(-l.direction + v);
-        spec = pow(dot(n, h), 3.0 + glossiness)*s;
+        spec = pow(abs(dot(n, h)), 3.0 + glossiness)*s;
     }
     
     return (diff*l.diffuse.rgb + spec*colSpecular.rgb);
@@ -68,7 +68,7 @@ vec3 ComputeLightDirectional(Light l, vec3 n, vec3 v, float s)
     if (diff > 0.0)
     {
         vec3 h = normalize(lightDir + v);
-        spec = pow(dot(n, h), 3.0 + glossiness)*s;
+        spec = pow(abs(dot(n, h)), 3.0 + glossiness)*s;
     }
     
     // Combine results
@@ -101,7 +101,7 @@ vec3 ComputeLightSpot(Light l, vec3 n, vec3 v, float s)
     if (diffAttenuation > 0.0)
     {
         vec3 h = normalize(lightDir + v);
-        spec = pow(dot(n, h), 3.0 + glossiness)*s;
+        spec = pow(abs(dot(n, h)), 3.0 + glossiness)*s;
     }
     
     return (falloff*(diffAttenuation*l.diffuse.rgb + spec*colSpecular.rgb));
@@ -131,7 +131,7 @@ void main()
     
     // Calculate specular texture color fetching or set to maximum specular value by default
     float spec = 1.0;
-    if (useSpecular == 1) spec *= normalize(texture(texture2, fragTexCoord).r);
+    if (useSpecular == 1) spec = texture(texture2, fragTexCoord).r;
     
     for (int i = 0; i < maxLights; i++)
     {

src/shader_standard.h

@@ -90,7 +90,7 @@ static const char fStandardShaderStr[] =
 "    if (diff > 0.0)\n"
 "    {\n"
 "        vec3 h = normalize(-l.direction + v);\n"
-"        spec = pow(dot(n, h), 3.0 + glossiness)*s;\n"
+"        spec = pow(abs(dot(n, h)), 3.0 + glossiness)*s;\n"
 "    }\n"
 "    return (diff*l.diffuse.rgb + spec*colSpecular.rgb);\n"
 "}\n"
@@ -103,7 +103,7 @@ static const char fStandardShaderStr[] =
 "    if (diff > 0.0)\n"
 "    {\n"
 "        vec3 h = normalize(lightDir + v);\n"
-"        spec = pow(dot(n, h), 3.0 + glossiness)*s;\n"
+"        spec = pow(abs(dot(n, h)), 3.0 + glossiness)*s;\n"
 "    }\n"
 "    return (diff*l.intensity*l.diffuse.rgb + spec*colSpecular.rgb);\n"
 "}\n"
@@ -124,7 +124,7 @@ static const char fStandardShaderStr[] =
 "    if (diffAttenuation > 0.0)\n"
 "    {\n"
 "        vec3 h = normalize(lightDir + v);\n"
-"        spec = pow(dot(n, h), 3.0 + glossiness)*s;\n"
+"        spec = pow(abs(dot(n, h)), 3.0 + glossiness)*s;\n"
 "    }\n"
 "    return (falloff*(diffAttenuation*l.diffuse.rgb + spec*colSpecular.rgb));\n"
 "}\n"
@@ -152,9 +152,9 @@ static const char fStandardShaderStr[] =
 "    }\n"
 "    float spec = 1.0;\n"
 #if defined(GRAPHICS_API_OPENGL_ES2) || defined(GRAPHICS_API_OPENGL_21)
-"    if (useSpecular == 1) spec *= normalize(texture2D(texture2, fragTexCoord).r);\n"
+"    if (useSpecular == 1) spec = texture2D(texture2, fragTexCoord).r;\n"
 #elif defined(GRAPHICS_API_OPENGL_33)
-"    if (useSpecular == 1) spec *= normalize(texture(texture2, fragTexCoord).r);\n"
+"    if (useSpecular == 1) spec = texture(texture2, fragTexCoord).r;\n"
 #endif
 "    for (int i = 0; i < maxLights; i++)\n"
 "    {\n"