Merge pull request #125 from raysan5/develop

Develop branch integration

17 files changed, 425 insertions, 210 deletions

diff --git a/examples/resources/shaders/bloom.fs b/examples/resources/shaders/bloom.fs
deleted file mode 100644
index 2833ce33..00000000
--- a/examples/resources/shaders/bloom.fs
+++ /dev/null
@@ -1,42 +0,0 @@
-#version 330
-
-in vec2 fragTexCoord;
-
-out vec4 fragColor;
-
-uniform sampler2D texture0;
-uniform vec4 fragTintColor;
-
-// NOTE: Add here your custom variables
-
-void main()
-{
-    vec4 sum = vec4(0);
-    vec4 tc = vec4(0);
-
-    for (int i = -4; i < 4; i++)
-    {
-        for (int j = -3; j < 3; j++)
-        {
-            sum += texture2D(texture0, fragTexCoord + vec2(j, i)*0.004) * 0.25;
-        }
-    }
-    
-    if (texture2D(texture0, fragTexCoord).r < 0.3)
-    {
-        tc = sum*sum*0.012 + texture2D(texture0, fragTexCoord);
-    }
-    else
-    {
-        if (texture2D(texture0, fragTexCoord).r < 0.5)
-        {
-            tc = sum*sum*0.009 + texture2D(texture0, fragTexCoord);
-        }
-        else
-        {
-            tc = sum*sum*0.0075 + texture2D(texture0, fragTexCoord);
-        }
-    }
-    
-    fragColor = tc;
-}
\ No newline at end of file
diff --git a/examples/resources/shaders/glsl100/base.vs b/examples/resources/shaders/glsl100/base.vs
new file mode 100644
index 00000000..e9386939
--- /dev/null
+++ b/examples/resources/shaders/glsl100/base.vs
@@ -0,0 +1,26 @@
+#version 100
+
+// Input vertex attributes
+attribute vec3 vertexPosition;
+attribute vec2 vertexTexCoord;
+attribute vec3 vertexNormal;
+attribute vec4 vertexColor;
+
+// Input uniform values
+uniform mat4 mvpMatrix;
+
+// Output vertex attributes (to fragment shader)
+varying vec2 fragTexCoord;
+varying vec4 fragColor;
+
+// NOTE: Add here your custom variables 
+
+void main()
+{
+    // Send vertex attributes to fragment shader
+    fragTexCoord = vertexTexCoord;
+    fragColor = vertexColor;
+    
+    // Calculate final vertex position
+    gl_Position = mvpMatrix*vec4(vertexPosition, 1.0);
+}
\ No newline at end of file
diff --git a/examples/resources/shaders/glsl100/bloom.fs b/examples/resources/shaders/glsl100/bloom.fs
new file mode 100644
index 00000000..280d2fb6
--- /dev/null
+++ b/examples/resources/shaders/glsl100/bloom.fs
@@ -0,0 +1,37 @@
+#version 100
+
+precision mediump float;
+
+// Input vertex attributes (from vertex shader)
+varying vec2 fragTexCoord;
+varying vec4 fragColor;
+
+// Input uniform values
+uniform sampler2D texture0;
+uniform vec4 fragTintColor;
+
+// NOTE: Add here your custom variables
+
+void main()
+{
+    vec4 sum = vec4(0);
+    vec4 tc = vec4(0);
+
+    for (int i = -4; i < 4; i++)
+    {
+        for (int j = -3; j < 3; j++)
+        {
+            sum += texture2D(texture0, fragTexCoord + vec2(j, i)*0.004) * 0.25;
+        }
+    }
+    
+    // Texel color fetching from texture sampler
+    vec4 texelColor = texture(texture0, fragTexCoord);
+    
+    // Calculate final fragment color
+    if (texelColor.r < 0.3) tc = sum*sum*0.012 + texelColor;
+    else if (texelColor.r < 0.5) tc = sum*sum*0.009 + texelColor;
+    else tc = sum*sum*0.0075 + texelColor;
+    
+    gl_FragColor = tc;
+}
\ No newline at end of file
diff --git a/examples/resources/shaders/glsl100/grayscale.fs b/examples/resources/shaders/glsl100/grayscale.fs
new file mode 100644
index 00000000..f92ec335
--- /dev/null
+++ b/examples/resources/shaders/glsl100/grayscale.fs
@@ -0,0 +1,25 @@
+#version 100
+
+precision mediump float;
+
+// Input vertex attributes (from vertex shader)
+varying vec2 fragTexCoord;
+varying vec4 fragColor;
+
+// Input uniform values
+uniform sampler2D texture0;
+uniform vec4 fragTintColor;
+
+// NOTE: Add here your custom variables
+
+void main()
+{
+    // Texel color fetching from texture sampler
+    vec4 texelColor = texture(texture0, fragTexCoord)*fragTintColor*fragColor;
+    
+    // Convert texel color to grayscale using NTSC conversion weights
+    float gray = dot(texelColor.rgb, vec3(0.299, 0.587, 0.114));
+    
+    // Calculate final fragment color
+    gl_FragColor = vec4(gray, gray, gray, texelColor.a);
+}
\ No newline at end of file
diff --git a/examples/resources/shaders/swirl.fs b/examples/resources/shaders/glsl100/swirl.fs
index f89ef406..0d6d24f2 100644
--- a/examples/resources/shaders/swirl.fs
+++ b/examples/resources/shaders/glsl100/swirl.fs
@@ -1,9 +1,12 @@
-#version 330
+#version 100
 
-in vec2 fragTexCoord;
+precision mediump float;
 
-out vec4 fragColor;
+// Input vertex attributes (from vertex shader)
+varying vec2 fragTexCoord;
+varying vec4 fragColor;
 
+// Input uniform values
 uniform sampler2D texture0;
 uniform vec4 fragTintColor;
 
@@ -17,11 +20,12 @@ float angle = 0.8;
 
 uniform vec2 center = vec2(200.0, 200.0);
 
-void main (void)
+void main()
 {
     vec2 texSize = vec2(renderWidth, renderHeight);
     vec2 tc = fragTexCoord*texSize;
     tc -= center;
+    
     float dist = length(tc);
 
     if (dist < radius) 
@@ -37,5 +41,5 @@ void main (void)
     tc += center;
     vec3 color = texture2D(texture0, tc/texSize).rgb;
 
-    fragColor = vec4(color, 1.0);;
+    gl_FragColor = vec4(color, 1.0);;
 }
\ No newline at end of file
diff --git a/examples/resources/shaders/glsl330/base.vs b/examples/resources/shaders/glsl330/base.vs
new file mode 100644
index 00000000..638cb8ae
--- /dev/null
+++ b/examples/resources/shaders/glsl330/base.vs
@@ -0,0 +1,26 @@
+#version 330
+
+// Input vertex attributes
+in vec3 vertexPosition;
+in vec2 vertexTexCoord;
+in vec3 vertexNormal;
+in vec4 vertexColor;
+
+// Input uniform values
+uniform mat4 mvpMatrix;
+
+// Output vertex attributes (to fragment shader)
+out vec2 fragTexCoord;
+out vec4 fragColor;
+
+// NOTE: Add here your custom variables 
+
+void main()
+{
+    // Send vertex attributes to fragment shader
+    fragTexCoord = vertexTexCoord;
+    fragColor = vertexColor;
+    
+    // Calculate final vertex position
+    gl_Position = mvpMatrix*vec4(vertexPosition, 1.0);
+}
\ No newline at end of file
diff --git a/examples/resources/shaders/glsl330/bloom.fs b/examples/resources/shaders/glsl330/bloom.fs
new file mode 100644
index 00000000..0307bc06
--- /dev/null
+++ b/examples/resources/shaders/glsl330/bloom.fs
@@ -0,0 +1,38 @@
+#version 330
+
+// Input vertex attributes (from vertex shader)
+in vec2 fragTexCoord;
+in vec4 fragColor;
+
+// Input uniform values
+uniform sampler2D texture0;
+uniform vec4 fragTintColor;
+
+// Output fragment color
+out vec4 finalColor;
+
+// NOTE: Add here your custom variables
+
+void main()
+{
+    vec4 sum = vec4(0);
+    vec4 tc = vec4(0);
+
+    for (int i = -4; i < 4; i++)
+    {
+        for (int j = -3; j < 3; j++)
+        {
+            sum += texture(texture0, fragTexCoord + vec2(j, i)*0.004)*0.25;
+        }
+    }
+    
+    // Texel color fetching from texture sampler
+    vec4 texelColor = texture(texture0, fragTexCoord);
+    
+    // Calculate final fragment color
+    if (texelColor.r < 0.3) tc = sum*sum*0.012 + texelColor;
+    else if (texelColor.r < 0.5) tc = sum*sum*0.009 + texelColor;
+    else tc = sum*sum*0.0075 + texelColor;
+
+    finalColor = tc;
+}
\ No newline at end of file
diff --git a/examples/resources/shaders/glsl330/depth.fs b/examples/resources/shaders/glsl330/depth.fs
new file mode 100644
index 00000000..06d399f9
--- /dev/null
+++ b/examples/resources/shaders/glsl330/depth.fs
@@ -0,0 +1,27 @@
+#version 330
+
+// Input vertex attributes (from vertex shader)
+in vec2 fragTexCoord;
+in vec4 fragColor;
+
+// Input uniform values
+uniform sampler2D texture0;     // Depth texture
+uniform vec4 fragTintColor;
+
+// Output fragment color
+out vec4 finalColor;
+
+// NOTE: Add here your custom variables
+
+void main()
+{
+    float zNear = 0.01; // camera z near
+    float zFar = 10.0;  // camera z far
+    float z = texture(texture0, fragTexCoord).x;
+
+    // Linearize depth value
+    float depth = (2.0*zNear)/(zFar + zNear - z*(zFar - zNear));
+    
+    // Calculate final fragment color
+    finalColor = vec4(depth, depth, depth, 1.0f);
+}
\ No newline at end of file
diff --git a/examples/resources/shaders/glsl330/grayscale.fs b/examples/resources/shaders/glsl330/grayscale.fs
new file mode 100644
index 00000000..5b3e11be
--- /dev/null
+++ b/examples/resources/shaders/glsl330/grayscale.fs
@@ -0,0 +1,26 @@
+#version 330
+
+// Input vertex attributes (from vertex shader)
+in vec2 fragTexCoord;
+in vec4 fragColor;
+
+// Input uniform values
+uniform sampler2D texture0;
+uniform vec4 colDiffuse;
+
+// Output fragment color
+out vec4 finalColor;
+
+// NOTE: Add here your custom variables
+
+void main()
+{
+    // Texel color fetching from texture sampler
+    vec4 texelColor = texture(texture0, fragTexCoord)*colDiffuse*fragColor;
+    
+    // Convert texel color to grayscale using NTSC conversion weights
+    float gray = dot(texelColor.rgb, vec3(0.299, 0.587, 0.114));
+    
+    // Calculate final fragment color
+    finalColor = vec4(gray, gray, gray, texelColor.a);
+}
\ No newline at end of file
diff --git a/examples/resources/shaders/glsl330/swirl.fs b/examples/resources/shaders/glsl330/swirl.fs
new file mode 100644
index 00000000..80c16cc9
--- /dev/null
+++ b/examples/resources/shaders/glsl330/swirl.fs
@@ -0,0 +1,46 @@
+#version 330
+
+// Input vertex attributes (from vertex shader)
+in vec2 fragTexCoord;
+in vec4 fragColor;
+
+// Input uniform values
+uniform sampler2D texture0;
+uniform vec4 fragTintColor;
+
+// Output fragment color
+out vec4 finalColor;
+
+// NOTE: Add here your custom variables
+
+const float renderWidth = 800.0;      // HARDCODED for example!
+const float renderHeight = 480.0;     // Use uniforms instead...
+
+float radius = 250.0;
+float angle = 0.8;
+
+uniform vec2 center = vec2(200.0, 200.0);
+
+void main()
+{
+    vec2 texSize = vec2(renderWidth, renderHeight);
+    vec2 tc = fragTexCoord*texSize;
+    tc -= center;
+    
+    float dist = length(tc);
+
+    if (dist < radius) 
+    {
+        float percent = (radius - dist)/radius;
+        float theta = percent*percent*angle*8.0;
+        float s = sin(theta);
+        float c = cos(theta);
+        
+        tc = vec2(dot(tc, vec2(c, -s)), dot(tc, vec2(s, c)));
+    }
+
+    tc += center;
+    vec3 color = texture(texture0, tc/texSize).rgb;
+
+    finalColor = vec4(color, 1.0);;
+}
\ No newline at end of file
diff --git a/examples/resources/shaders/grayscale.fs b/examples/resources/shaders/grayscale.fs
deleted file mode 100644
index af50b8c1..00000000
--- a/examples/resources/shaders/grayscale.fs
+++ /dev/null
@@ -1,20 +0,0 @@
-#version 330
-
-in vec2 fragTexCoord;
-
-out vec4 fragColor;
-
-uniform sampler2D texture0;
-uniform vec4 fragTintColor;
-
-// NOTE: Add here your custom variables
-
-void main()
-{
-    vec4 base = texture2D(texture0, fragTexCoord)*fragTintColor;
-    
-    // Convert to grayscale using NTSC conversion weights
-    float gray = dot(base.rgb, vec3(0.299, 0.587, 0.114));
-    
-    fragColor = vec4(gray, gray, gray, fragTintColor.a);
-}
\ No newline at end of file
diff --git a/examples/resources/shaders/phong.fs b/examples/resources/shaders/phong.fs
deleted file mode 100644
index f79413d9..00000000
--- a/examples/resources/shaders/phong.fs
+++ /dev/null
@@ -1,76 +0,0 @@
-#version 330
-
-// Vertex shader input data
-in vec2 fragTexCoord;
-in vec3 fragNormal;
-
-// Diffuse data
-uniform sampler2D texture0;
-uniform vec4 fragTintColor;
-
-// Light attributes
-uniform vec3 light_ambientColor = vec3(0.6, 0.3, 0.0);
-uniform vec3 light_diffuseColor = vec3(1.0, 0.5, 0.0);
-uniform vec3 light_specularColor = vec3(0.0, 1.0, 0.0);
-uniform float light_intensity = 1.0;
-uniform float light_specIntensity = 1.0;
-
-// Material attributes
-uniform vec3 mat_ambientColor = vec3(1.0, 1.0, 1.0);
-uniform vec3 mat_specularColor = vec3(1.0, 1.0, 1.0);
-uniform float mat_glossiness = 50.0;
-
-// World attributes
-uniform vec3 lightPos;
-uniform vec3 cameraPos;
-
-// Fragment shader output data
-out vec4 fragColor;
-
-vec3 AmbientLighting()
-{
-   return (mat_ambientColor*light_ambientColor);
-}
-
-vec3 DiffuseLighting(in vec3 N, in vec3 L)
-{
-   // Lambertian reflection calculation
-   float diffuse = clamp(dot(N, L), 0, 1);
-   
-   return (fragTintColor.xyz*light_diffuseColor*light_intensity*diffuse);
-}
-
-vec3 SpecularLighting(in vec3 N, in vec3 L, in vec3 V)
-{
-   float specular = 0.0;
-
-   // Calculate specular reflection only if the surface is oriented to the light source
-   if (dot(N, L) > 0)
-   {
-      // Calculate half vector
-      vec3 H = normalize(L + V);
-      
-      // Calculate specular intensity
-      specular = pow(dot(N, H), 3 + mat_glossiness);
-   }
-   
-   return (mat_specularColor*light_specularColor*light_specIntensity*specular);
-}
-
-void main()
-{
-    // Normalize input vectors
-    vec3 L = normalize(lightPos);
-    vec3 V = normalize(cameraPos);
-    vec3 N = normalize(fragNormal);
-    
-    vec3 ambient = AmbientLighting();
-    vec3 diffuse = DiffuseLighting(N, L);
-    vec3 specular = SpecularLighting(N, L, V);
-    
-    // Get base color from texture
-    vec4 textureColor = texture(texture0, fragTexCoord);
-    vec3 finalColor = textureColor.rgb;
-    
-    fragColor = vec4(finalColor * (ambient + diffuse + specular), textureColor.a);
-}
\ No newline at end of file
diff --git a/examples/resources/shaders/phong.vs b/examples/resources/shaders/phong.vs
deleted file mode 100644
index 52cc2227..00000000
--- a/examples/resources/shaders/phong.vs
+++ /dev/null
@@ -1,29 +0,0 @@
-#version 330
-
-// Vertex input data
-in vec3 vertexPosition;
-in vec2 vertexTexCoord;
-in vec3 vertexNormal;
-
-// Projection and model data
-uniform mat4 mvpMatrix;
-
-uniform mat4 modelMatrix;
-//uniform mat4 viewMatrix;  // Not used
-
-// Attributes to fragment shader
-out vec2 fragTexCoord;
-out vec3 fragNormal;
-
-void main()
-{
-    // Send texture coord to fragment shader
-    fragTexCoord = vertexTexCoord;
-    
-    // Calculate view vector normal from model
-    mat3 normalMatrix = transpose(inverse(mat3(modelMatrix)));
-    fragNormal = normalize(normalMatrix*vertexNormal);
-    
-    // Calculate final vertex position
-    gl_Position = mvpMatrix*vec4(vertexPosition, 1.0);
-}
\ No newline at end of file
diff --git a/examples/resources/shaders/shapes_base.vs b/examples/resources/shaders/shapes_base.vs
deleted file mode 100644
index ad272dc1..00000000
--- a/examples/resources/shaders/shapes_base.vs
+++ /dev/null
@@ -1,18 +0,0 @@
-#version 330
-
-attribute vec3 vertexPosition;
-attribute vec2 vertexTexCoord;
-attribute vec4 vertexColor;
-
-uniform mat4 mvpMatrix;
-
-varying vec2 fragTexCoord;
-varying vec4 fragTintColor;
-
-void main()
-{
-    fragTexCoord = vertexTexCoord;
-    fragTintColor = vertexColor;
-    
-    gl_Position = mvpMatrix*vec4(vertexPosition, 1.0);
-}
\ No newline at end of file
diff --git a/examples/resources/shaders/shapes_grayscale.fs b/examples/resources/shaders/shapes_grayscale.fs
deleted file mode 100644
index 0698e1bf..00000000
--- a/examples/resources/shaders/shapes_grayscale.fs
+++ /dev/null
@@ -1,15 +0,0 @@
-#version 330
-
-uniform sampler2D texture0;
-varying vec2 fragTexCoord;
-varying vec4 fragTintColor;
-
-void main()
-{
-    vec4 base = texture2D(texture0, fragTexCoord)*fragTintColor;
-
-    // Convert to grayscale using NTSC conversion weights
-    float gray = dot(base.rgb, vec3(0.299, 0.587, 0.114));
-    
-    gl_FragColor = vec4(gray, gray, gray, base.a);
-}
\ No newline at end of file
diff --git a/examples/resources/shaders/standard.fs b/examples/resources/shaders/standard.fs
new file mode 100644
index 00000000..e5a6d1bc
--- /dev/null
+++ b/examples/resources/shaders/standard.fs
@@ -0,0 +1,155 @@
+#version 330
+
+in vec3 fragPosition;
+in vec2 fragTexCoord;
+in vec4 fragColor;
+in vec3 fragNormal;
+
+out vec4 finalColor;
+
+uniform sampler2D texture0;
+uniform sampler2D texture1;
+uniform sampler2D texture2;
+
+uniform vec4 colAmbient;
+uniform vec4 colDiffuse;
+uniform vec4 colSpecular;
+uniform float glossiness;
+
+uniform int useNormal;
+uniform int useSpecular;
+
+uniform mat4 modelMatrix;
+uniform vec3 viewDir;
+
+struct Light {
+    int enabled;
+    int type;
+    vec3 position;
+    vec3 direction;
+    vec4 diffuse;
+    float intensity;
+    float radius;
+    float coneAngle;
+};
+
+const int maxLights = 8;
+uniform int lightsCount;
+uniform Light lights[maxLights];
+
+vec3 CalcPointLight(Light l, vec3 n, vec3 v, float s)
+{
+    vec3 surfacePos = vec3(modelMatrix*vec4(fragPosition, 1));
+    vec3 surfaceToLight = l.position - surfacePos;
+    
+    // Diffuse shading
+    float brightness = clamp(dot(n, surfaceToLight)/(length(surfaceToLight)*length(n)), 0, 1);
+    float diff = 1.0/dot(surfaceToLight/l.radius, surfaceToLight/l.radius)*brightness*l.intensity;
+    
+    // Specular shading
+    float spec = 0.0;
+    if (diff > 0.0)
+    {
+        vec3 h = normalize(-l.direction + v);
+        spec = pow(dot(n, h), 3 + glossiness)*s;
+    }
+    
+    return (diff*l.diffuse.rgb + spec*colSpecular.rgb);
+}
+
+vec3 CalcDirectionalLight(Light l, vec3 n, vec3 v, float s)
+{
+    vec3 lightDir = normalize(-l.direction);
+    
+    // Diffuse shading
+    float diff = clamp(dot(n, lightDir), 0.0, 1.0)*l.intensity;
+    
+    // Specular shading
+    float spec = 0.0;
+    if (diff > 0.0)
+    {
+        vec3 h = normalize(lightDir + v);
+        spec = pow(dot(n, h), 3 + glossiness)*s;
+    }
+    
+    // Combine results
+    return (diff*l.intensity*l.diffuse.rgb + spec*colSpecular.rgb);
+}
+
+vec3 CalcSpotLight(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);
+    
+    // Diffuse shading
+    float diff = clamp(dot(n, lightDir), 0.0, 1.0)*l.intensity;
+    
+    // Spot attenuation
+    float attenuation = clamp(dot(n, lightToSurface), 0.0, 1.0);
+    attenuation = dot(lightToSurface, -lightDir);
+    
+    float lightToSurfaceAngle = degrees(acos(attenuation));
+    if (lightToSurfaceAngle > l.coneAngle) attenuation = 0.0;
+    
+    float falloff = (l.coneAngle - lightToSurfaceAngle)/l.coneAngle;
+    
+    // Combine diffuse and attenuation
+    float diffAttenuation = diff*attenuation;
+    
+    // Specular shading
+    float spec = 0.0;
+    if (diffAttenuation > 0.0)
+    {
+        vec3 h = normalize(lightDir + v);
+        spec = pow(dot(n, h), 3 + glossiness)*s;
+    }
+    
+    return (falloff*(diffAttenuation*l.diffuse.rgb + spec*colSpecular.rgb));
+}
+
+void main()
+{
+    // Calculate fragment normal in screen space
+    // NOTE: important to multiply model matrix by fragment normal to apply model transformation (rotation and scale)
+    mat3 normalMatrix = transpose(inverse(mat3(modelMatrix)));
+    vec3 normal = normalize(normalMatrix*fragNormal);
+
+    // Normalize normal and view direction vectors
+    vec3 n = normalize(normal);
+    vec3 v = normalize(viewDir);
+
+    // Calculate diffuse texture color fetching
+    vec4 texelColor = texture(texture0, fragTexCoord);
+    vec3 lighting = colAmbient.rgb;
+    
+    // Calculate normal texture color fetching or set to maximum normal value by default
+    if (useNormal == 1)
+    {
+        n *= texture(texture1, fragTexCoord).rgb;
+        n = normalize(n);
+    }
+    
+    // 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);
+    
+    for (int i = 0; i < lightsCount; i++)
+    {
+        // Check if light is enabled
+        if (lights[i].enabled == 1)
+        {
+            // Calculate lighting based on light type
+            switch (lights[i].type)
+            {
+                case 0: lighting += CalcPointLight(lights[i], n, v, spec); break;
+                case 1: lighting += CalcDirectionalLight(lights[i], n, v, spec); break;
+                case 2: lighting += CalcSpotLight(lights[i], n, v, spec); break;
+                default: break;
+            }
+        }
+    }
+    
+    // Calculate final fragment color
+    finalColor = vec4(texelColor.rgb*lighting*colDiffuse.rgb, texelColor.a*colDiffuse.a);
+}
diff --git a/examples/resources/shaders/base.vs b/examples/resources/shaders/standard.vs
index b0f930b7..fc0a5ff4 100644
--- a/examples/resources/shaders/base.vs
+++ b/examples/resources/shaders/standard.vs
@@ -1,18 +1,23 @@
-#version 330
+#version 330 
 
 in vec3 vertexPosition;
-in vec2 vertexTexCoord;
 in vec3 vertexNormal;
+in vec2 vertexTexCoord;
+in vec4 vertexColor;
 
+out vec3 fragPosition;
 out vec2 fragTexCoord;
+out vec4 fragColor;
+out vec3 fragNormal;
 
 uniform mat4 mvpMatrix;
 
-// NOTE: Add here your custom variables 
-
 void main()
 {
+    fragPosition = vertexPosition;
     fragTexCoord = vertexTexCoord;
-    
+    fragColor = vertexColor;
+    fragNormal = vertexNormal;
+
     gl_Position = mvpMatrix*vec4(vertexPosition, 1.0);
 }
\ No newline at end of file