Initial commit

resources/models/alien-hominid/alien.mtl

@@ -0,0 +1,55 @@
+# Blender MTL File: 'None'
+# Material Count: 4
+
+newmtl AlienHominid
+Ns 225.000000
+Ka 1.000000 1.000000 1.000000
+Kd 0.800000 0.533344 0.000000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 2
+map_Bump normal.png
+map_Kd diffuse.png
+map_Ns roughness.png
+refl specular.png
+
+newmtl Blaster
+Ns 225.000000
+Ka 1.000000 1.000000 1.000000
+Kd 0.800000 0.800000 0.800000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 2
+map_Bump blaster_normal.png
+map_Kd blaster_diffuse.png
+map_Ke blaster_emissive.png
+map_Ns blaster_roughness.png
+refl blaster_specular.png
+
+newmtl Screenshot_2021-04-19_194508
+Ns 225.000000
+Ka 1.000000 1.000000 1.000000
+Kd 0.800000 0.800000 0.800000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 2
+map_Kd smoke.png
+map_d smoke.png
+
+newmtl Untitled-1
+Ns 77.904748
+Ka 1.000000 1.000000 1.000000
+Kd 0.800000 0.800000 0.800000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 2
+map_Kd Untitled-1.png
+map_d Untitled-1.png

resources/models/backpack/backpack.mtl

@@ -0,0 +1,16 @@
+# Blender MTL File: 'None'
+# Material Count: 1
+
+newmtl Scene_-_Root
+Ns 225.000000
+Ka 1.000000 1.000000 1.000000
+Kd 0.800000 0.800000 0.800000
+Ks 0.500000 0.500000 0.500000
+Ke 0.0 0.0 0.0
+Ni 1.450000
+d 1.000000
+illum 2
+map_Kd diffuse.jpg
+map_Bump normal.png
+map_Ks specular.jpg
+

resources/models/backpack/source_attribution.txt

@@ -0,0 +1,3 @@
+Model by Berk Gedik, from: https://sketchfab.com/3d-models/survival-guitar-backpack-low-poly-799f8c4511f84fab8c3f12887f7e6b36
+
+Modified material assignment (Joey de Vries) for easier load in OpenGL model loading chapter, and renamed albedo to diffuse and metallic to specular to match non-PBR lighting setup.

resources/models/bird/bird.mtl

@@ -0,0 +1,7 @@
+newmtl material_0
+map_bump normal.jpg
+norm normal.jpg
+map_Kd diffuse.jpg
+occlusion occlusion.jpg
+Pm 0
+Pr 0.793152

resources/models/floor.obj

@@ -0,0 +1,12 @@
+# Blender v2.82 (sub 7) OBJ File: ''
+# www.blender.org
+mtllib floor.mtl
+o floor
+v -1.000000 -0.000000 1.000000
+v 1.000000 -0.000000 1.000000
+v 1.000000 0.000000 -1.000000
+v -1.000000 0.000000 -1.000000
+vn 0.0000 1.0000 0.0000
+usemtl Default_OBJ
+s off
+f 1//1 2//1 3//1 4//1

resources/models/lion/lion.mtl

@@ -0,0 +1,16 @@
+# Blender MTL File: 'None'
+# Material Count: 1
+
+newmtl Lion
+Ns 500.000001
+Ka 1.000000 1.000000 1.000000
+Kd 0.800000 0.800000 0.800000
+Ks 0.800000 0.800000 0.800000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 2
+map_Bump normal.jpg
+map_Kd diffuse.jpg
+map_Ns roughness.jpg
+refl specular.jpg

resources/models/scythe/scythe.mtl

@@ -0,0 +1,8 @@
+# WaveFront *.mtl file (generated by CINEMA 4D)
+
+newmtl item/objectcomponents/weapon/staff_2h_artifactdeadwind_d_03.m2_Geoset_000
+Ka 0.25 0.25 0.25
+Kd 1 1 1
+map_Kd diffuse.png
+illum 7
+

resources/models/spartan/spartan.mtl

@@ -0,0 +1,104 @@
+# Blender MTL File: 'None'
+# Material Count: 8
+
+newmtl Spartan_Arms_Mat
+Ns 179.999996
+Ka 1.000000 1.000000 1.000000
+Kd 1.000000 1.000000 1.000000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 2
+map_Kd Spartan_Arms_Mat_BaseColor.png
+map_Bump Spartan_Arms_Mat_Normal.png
+refl Spartan_Arms_Mat_Specular.png
+
+
+newmtl Spartan_Chest_Mat
+Ns 179.999996
+Ka 1.000000 1.000000 1.000000
+Kd 1.000000 1.000000 1.000000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 2
+map_Kd Spartan_Chest_Mat_BaseColor.png
+map_Bump Spartan_Chest_Mat_Normal.png
+refl Spartan_Chest_Mat_Specular.png
+
+newmtl Spartan_Ear_Mat
+Ns 179.999996
+Ka 1.000000 1.000000 1.000000
+Kd 1.000000 1.000000 1.000000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 2
+map_Kd Spartan_Ears_Mat_BaseColor.png
+map_Bump Spartan_Ears_Mat_Normal.png
+refl Spartan_Ears_Mat_Specular.png
+
+newmtl Spartan_Helmet_Mat
+Ns 179.999996
+Ka 1.000000 1.000000 1.000000
+Kd 1.000000 1.000000 1.000000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 2
+map_Kd Spartan_Helmet_Mat_BaseColor.png
+map_Bump Spartan_Helmet_Mat_Normal.png
+refl Spartan_Helmet_Mat_Specular.png
+
+newmtl Spartan_Legs_Mat
+Ns 179.999996
+Ka 1.000000 1.000000 1.000000
+Kd 1.000000 1.000000 1.000000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 2
+map_Kd Spartan_Legs_Mat_BaseColor.png
+map_Bump Spartan_Legs_Mat_Normal.png
+refl Spartan_Legs_Mat_Specular.png
+
+newmtl Spartan_Shoulders_Mat
+Ns 179.999996
+Ka 1.000000 1.000000 1.000000
+Kd 1.000000 1.000000 1.000000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 2
+map_Kd Spartan_Shoulder_Mat_BaseColor.png
+map_Bump Spartan_Shoulder_Mat_Normal.png
+refl Spartan_Shoulder_Mat_Specular.png
+
+newmtl Spartan_Undersuit_Mat
+Ns 179.999996
+Ka 1.000000 1.000000 1.000000
+Kd 1.000000 1.000000 1.000000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 2
+map_Kd Spartan_Undersuit_Mat_BaseColor.png
+map_Bump Spartan_Undersuit_Mat_Normal.png
+refl Spartan_Undersuit_Mat_Specular.png
+
+newmtl lambert1
+Ns 179.999996
+Ka 1.000000 1.000000 1.000000
+Kd 0.500000 0.500000 0.500000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 2

resources/shaders/fragment/model-basic.frag

@@ -0,0 +1,11 @@
+#version 330 core
+out vec4 fColor;
+
+in vec2 vTextureCoord;
+
+uniform sampler2D texture_diffuse1;
+
+void main()
+{
+    fColor = texture(texture_diffuse1, vTextureCoord);
+}

resources/shaders/fragment/model-normals.frag

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+#version 330 core
+struct Light {
+    vec3 position;
+// Light colors RGB value
+    vec3 ambient;
+    vec3 diffuse;
+    vec3 specular;
+};
+
+// Input from Vertex shader
+in VS_OUT {
+// Frag position, UV coordinates, normals
+    vec2 textureCoord;
+    vec3 position;
+    vec3 normal;
+// Tangent positions
+    vec3 tangentLight;
+    vec3 tangentView;
+    vec3 tangentFrag;
+    Light light;
+} vOut;
+
+// Final fragment fColor
+out vec4 fColor;
+
+struct Material {
+// Strength ranges 0.0f - 1.0f
+    float ambientStrength;
+    float diffuseStrength;
+    float specularStrength;
+// 32, 64, 128, 256
+    float shine;
+
+// Material color values
+    vec3 ambient;
+    vec3 diffuse;
+    vec3 specular;
+};
+uniform Material uMaterial;
+
+struct Result {
+    vec3 ambient;
+    vec3 diffuse;
+    vec3 specular;
+    vec3 sum;
+};
+
+void SumResult(inout Result result)
+{
+    result.sum = result.ambient + result.diffuse + result.specular;
+}
+
+uniform sampler2D texture_diffuse1;
+uniform sampler2D texture_specular1;
+uniform sampler2D texture_normal1;
+
+void main()
+{
+    Result result;
+
+    // Diffuse texture for ambient and diffuse lighting
+    vec3 diffuseTexture = vec3(texture(texture_diffuse1, vOut.textureCoord));
+
+    // Ambient lighting
+    vec3 ambientLighting = vOut.light.ambient * uMaterial.ambient;
+    result.ambient = ambientLighting * diffuseTexture;
+    result.ambient *= uMaterial.ambientStrength;
+
+    // Diffuse lighting
+    vec3 normalTexture = texture(texture_normal1, vOut.textureCoord).rgb;
+    normalTexture = normalize(normalTexture * 2.0f - 1.0f);
+
+    vec3 lightDir = normalize(vOut.tangentLight - vOut.tangentFrag);
+    float diff = max(dot(lightDir, normalTexture), 0.0f);
+    vec3 diffuseLighting = vOut.light.diffuse * diff * uMaterial.diffuse;
+    result.diffuse = diffuseLighting * diffuseTexture;
+    result.diffuse *= uMaterial.diffuseStrength;
+
+    // Specular lighting
+    vec3 specularTexture = vec3(texture(texture_specular1, vOut.textureCoord));
+
+    vec3 viewDir = normalize(vOut.tangentView - vOut.tangentFrag);
+    vec3 reflectDir = reflect(-lightDir, normalTexture);
+    vec3 halfDir = normalize(lightDir + viewDir);
+    float angleAlpha = max(dot(normalTexture, halfDir), 0.0f);
+    float spec = pow(angleAlpha, uMaterial.shine);
+    vec3 specLighting = vOut.light.specular * spec;
+    result.specular = specLighting * specularTexture;
+    result.specular *= uMaterial.specularStrength;
+
+    SumResult(result);
+    fColor = vec4(result.sum, 1.0f);
+}

resources/shaders/fragment/model-specular.frag

@@ -0,0 +1,85 @@
+#version 330 core
+// Input from Vertex shader
+in vec2 vTextureCoord;
+in vec3 vNormal;
+in vec3 vPosition;
+
+// Final fragment fColor
+out vec4 fColor;
+
+// Light object and camera position vectors
+uniform vec3 uCameraPosition;
+struct Light {
+    vec3 position;
+
+// Light colors RGB value
+    vec3 ambient;
+    vec3 diffuse;
+    vec3 specular;
+};
+uniform Light uLight;
+
+struct Material {
+// Strength ranges 0.0f - 1.0f
+    float ambientStrength;
+    float diffuseStrength;
+    float specularStrength;
+// 32, 64, 128, 256
+    float shine;
+
+// Material color values
+    vec3 ambient;
+    vec3 diffuse;
+    vec3 specular;
+};
+uniform Material uMaterial;
+
+struct Result {
+    vec3 ambient;
+    vec3 diffuse;
+    vec3 specular;
+    vec3 sum;
+};
+
+void SumResult(inout Result result)
+{
+    result.sum = result.ambient + result.diffuse + result.specular;
+}
+
+uniform sampler2D texture_diffuse1;
+uniform sampler2D texture_specular1;
+
+void main()
+{
+    Result result;
+
+    // Diffuse texture for ambient and diffuse lighting
+    vec3 diffuseTexture = vec3(texture(texture_diffuse1, vTextureCoord));
+
+    // Ambient lighting
+    vec3 ambientLighting = uLight.ambient * uMaterial.ambient;
+    result.ambient = ambientLighting * diffuseTexture;
+    result.ambient *= uMaterial.ambientStrength;
+
+    // Diffuse lighting
+    vec3 norm = normalize(vNormal);
+    vec3 lightDir = normalize(uLight.position - vPosition);
+    float diff = max(dot(norm, lightDir), 0.0f);
+    vec3 diffuseLighting = uLight.diffuse * diff * uMaterial.diffuse;
+    result.diffuse = diffuseLighting * diffuseTexture;
+    result.diffuse *= uMaterial.diffuseStrength;
+
+    // Specular lighting
+    vec3 specularTexture = vec3(texture(texture_specular1, vTextureCoord));
+
+    vec3 viewDir = normalize(uCameraPosition - vPosition);
+    vec3 reflectDir = reflect(-lightDir, norm);
+    float angleAlpha = max(dot(viewDir, reflectDir), 0.0f);
+    float spec = pow(angleAlpha, uMaterial.shine);
+    vec3 specLighting = uLight.specular * spec;
+    result.specular = specLighting * specularTexture;
+    result.specular *= uMaterial.specularStrength;
+
+    SumResult(result);
+    fColor = vec4(result.sum, 1.0f);
+}

resources/shaders/fragment/model.frag

@@ -0,0 +1,93 @@
+#version 330 core
+struct Light {
+    vec3 position;
+// Light colors RGB value
+    vec3 ambient;
+    vec3 diffuse;
+    vec3 specular;
+};
+
+// Input from Vertex shader
+in VS_OUT {
+// Frag position, UV coordinates, normals
+    vec2 textureCoord;
+    vec3 position;
+    vec3 normal;
+// Tangent positions
+    vec3 tangentLight;
+    vec3 tangentView;
+    vec3 tangentFrag;
+    Light light;
+} vOut;
+
+// Final fragment fColor
+out vec4 fColor;
+
+struct Material {
+// Strength ranges 0.0f - 1.0f
+    float ambientStrength;
+    float diffuseStrength;
+    float specularStrength;
+// 32, 64, 128, 256
+    float shine;
+
+// Material color values
+    vec3 ambient;
+    vec3 diffuse;
+    vec3 specular;
+};
+uniform Material uMaterial;
+
+struct Result {
+    vec3 ambient;
+    vec3 diffuse;
+    vec3 specular;
+    vec3 sum;
+};
+
+void SumResult(inout Result result)
+{
+    result.sum = result.ambient + result.diffuse + result.specular;
+}
+
+uniform sampler2D texture_diffuse1;
+uniform sampler2D texture_specular1;
+uniform sampler2D texture_normal1;
+
+void main()
+{
+    Result result;
+
+    // Diffuse texture for ambient and diffuse lighting
+    vec3 diffuseTexture = vec3(texture(texture_diffuse1, vOut.textureCoord));
+
+    // Ambient lighting
+    vec3 ambientLighting = vOut.light.ambient * uMaterial.ambient;
+    result.ambient = ambientLighting * diffuseTexture;
+    result.ambient *= uMaterial.ambientStrength;
+
+    // Diffuse lighting
+    vec3 normalTexture = texture(texture_normal1, vOut.textureCoord).rgb;
+    normalTexture = normalize(normalTexture * 2.0f - 1.0f);
+
+    vec3 lightDir = normalize(vOut.tangentLight - vOut.tangentFrag);
+    float diff = max(dot(lightDir, normalTexture), 0.0f);
+    vec3 diffuseLighting = vOut.light.diffuse * diff * uMaterial.diffuse;
+    result.diffuse = diffuseLighting * diffuseTexture;
+    result.diffuse *= uMaterial.diffuseStrength;
+
+    // Specular lighting
+    vec3 specularTexture = vec3(texture(texture_specular1, vOut.textureCoord));
+
+    vec3 viewDir = normalize(vOut.tangentView - vOut.tangentFrag);
+    vec3 reflectDir = reflect(-lightDir, normalTexture);
+    vec3 halfDir = normalize(lightDir + viewDir);
+    float angleAlpha = max(dot(normalTexture, halfDir), 0.0f);
+    float spec = pow(angleAlpha, uMaterial.shine);
+    vec3 specLighting = vOut.light.specular * spec;
+    result.specular = specLighting * specularTexture;
+    result.specular *= uMaterial.specularStrength;
+
+    SumResult(result);
+    fColor = vec4(result.sum, 1.0f);
+}

resources/shaders/fragment/multi-color.frag

@@ -0,0 +1,9 @@
+#version 330
+in vec4 vColor;
+
+out vec4 fColor;
+
+void main()
+{
+  fColor = vColor;
+}

resources/shaders/fragment/phong.frag

@@ -0,0 +1,94 @@
+#version 330
+// Color input from Vertex shader
+in vec3 vNormal;
+in vec3 vPosition;
+
+// Final fragment fColor
+out vec4 fColor;
+
+// Light object and camera position vectors
+uniform vec3 uCameraPosition;
+struct Light {
+  vec3 position;
+
+  // Light colors RGB value
+  vec3 ambient;
+  vec3 diffuse;
+  vec3 specular;
+};
+uniform Light uLight;
+
+struct Material {
+  // Strength ranges 0.0f - 1.0f
+  float ambientStrength;
+  float diffuseStrength;
+  float specularStrength;
+  // 32, 64, 128, 256
+  float shine;
+
+  // Material color values
+  vec3 ambient;
+  vec3 diffuse;
+  vec3 specular;
+};
+uniform Material uMaterial;
+
+struct Result {
+  vec3 ambient;
+  vec3 diffuse;
+  vec3 specular;
+  vec3 sum;
+};
+
+void SumResult(inout Result result)
+{
+  result.sum = result.ambient + result.diffuse + result.specular;
+}
+
+void main()
+{
+  // A struct to store lighting results as we finish calculating them
+  // Valuse stored here will be applied to the final output of our shader
+  Result result;
+
+  // Ambient lighting
+  result.ambient =  (uLight.ambient * uMaterial.ambient) * uMaterial.ambientStrength;
+
+  //
+  // Diffuse lighting
+
+  // Normalize the provided normal vector
+  // + Creates a vector with length of 1 in the same direction as vNormal
+  vec3 norm = normalize(vNormal);
+  // Get a vector from this frag to the lightSoruce
+  vec3 lightDir = normalize(uLight.position - vPosition);
+  // As the normal vector approaches an angle looking at lightDir vector
+  // + If this is negative, the frag is on a surface opposite of the lightSource
+  float diff = max(dot(norm, lightDir), 0.0f);
+  result.diffuse = (uLight.diffuse * diff * uMaterial.diffuse) * uMaterial.diffuseStrength;
+
+  //
+  // Specular lighting
+
+  // Get a vector from the camera to the fragment as our viewDir
+  vec3 viewDir = normalize(uCameraPosition - vPosition);
+  // Since lightDir is already a vector from this frag to the light source
+  // reflectionDir is the opposite; A vector from the light to the frag
+  vec3 reflectDir = reflect(-lightDir, norm);
+
+  // Use dot product to check if viewDir and reflectDir angles are intersecting
+  // -1.0f if they are opposite; 1.0 if they are looking at each other directly
+  // + If this is negative, the lightSource is behind the player; Ignore it
+  float angleAlpha = max(dot(viewDir, reflectDir), 0.0f);
+  // As the angleAlpha approaches 1, raise to the power of uMaterial.shine
+  float spec = pow(angleAlpha, uMaterial.shine);
+  // Apply specular result to the
+  result.specular = (uLight.specular * uMaterial.specular * spec) * uMaterial.specularStrength;
+
+  //
+  // Final calculation
+  SumResult(result);
+
+  // Final output
+  fColor = vec4(result.sum, 1.0f); // Reapply alpha for opacity
+}

resources/shaders/fragment/rgb-normals.frag

@@ -0,0 +1,11 @@
+#version 330
+// Color input from Vertex shader
+in vec3 vNormal;
+
+// Final fragment color
+out vec4 fColor;
+
+void main()
+{
+  fColor = vec4(abs(vNormal), 1.0f); // Reapply alpha
+}

resources/shaders/fragment/solid-ambient.frag

@@ -0,0 +1,19 @@
+#version 330
+// Color input from Vertex shader
+in vec4 vColor;
+
+// Final fragment color
+out vec4 fColor;
+
+// Light color RGB value
+uniform vec3 uLightColor;
+// Strength ranges 0.0f - 1.0f
+uniform float uAmbientStrength;  // 0.2f
+
+void main()
+{
+  vec3 ambient = uAmbientStrength * uLightColor;
+
+  vec3 result = ambient * vec3(vColor); // Strip aColor to vec3 to drop alpha
+  fColor = vec4(result, 1.0f); // Reapply alpha
+}

resources/shaders/fragment/solid-diffuse.frag

@@ -0,0 +1,35 @@
+#version 330
+// Color input from Vertex shader
+in vec4 vColor;
+in vec3 vNormal;
+in vec3 vPosition;
+
+// Final fragment color
+out vec4 fColor;
+
+// Light color RGB value
+uniform vec3 uLightColor;
+// Light object position vector
+uniform vec3 uLightPosition;
+
+// Strength ranges 0.0f - 1.0f
+uniform float uAmbientStrength;  // 0.2f
+
+void main()
+{
+  // Ambient lighting
+  vec3 ambient = uAmbientStrength * uLightColor;
+
+  // Diffuse lighting
+  vec3 norm = normalize(vNormal);
+  vec3 lightDir = normalize(uLightPosition - vPosition);
+  float diff = max(dot(norm, lightDir), 0.0f);
+
+  vec3 diffuse = diff * uLightColor;
+
+  // Strip vColor to vec3 to drop alpha
+  vec3 result = (ambient + diffuse) * vec3(vColor);
+
+  // Final output
+  fColor = vec4(result, 1.0f); // Reapply alpha
+}

resources/shaders/fragment/solid-perspective.frag

@@ -0,0 +1,9 @@
+#version 330
+in vec4 vColor;
+
+out vec4 fColor;
+
+void main()
+{
+  fColor = vColor;
+}

resources/shaders/fragment/solid-phong.frag

@@ -0,0 +1,49 @@
+#version 330
+// Color input from Vertex shader
+in vec4 vColor;
+in vec3 vNormal;
+in vec3 vPosition;
+
+// Final fragment fColor
+out vec4 fColor;
+
+// Light color RGB value
+uniform vec3 uLightColor;
+// Light object and camera position vectors
+uniform vec3 uLightPosition;
+uniform vec3 uCameraPosition;
+
+// Strength ranges 0.0f - 1.0f
+uniform float uAmbientStrength;  // 0.2f
+uniform float uSpecularStrength; // 0.25f
+// 32, 64, 128, 256
+uniform int uSpecularShine; // 64
+
+void main()
+{
+  // Ambient lighting
+  vec3 ambient = uAmbientStrength * uLightColor;
+
+  // Diffuse lighting
+  vec3 norm = normalize(vNormal);
+  vec3 lightDir = normalize(uLightPosition - vPosition);
+  float diff = max(dot(norm, lightDir), 0.0f);
+
+  vec3 diffuse = diff * uLightColor;
+
+  // Specular lighting
+  vec3 viewDir = normalize(uCameraPosition - vPosition);
+  vec3 reflectDir = reflect(-lightDir, norm);
+
+  float spec = pow(max(dot(viewDir, reflectDir), 0.0), uSpecularShine);
+  vec3 specular = uSpecularStrength * spec * uLightColor;
+
+  //
+  // Final calculation
+
+  // Strip vColor to vec3 to drop alpha
+  vec3 result = (ambient + diffuse + specular) * vec3(vColor);
+
+  // Final output
+  fColor = vec4(result, 1.0f); // Reapply alpha
+}

resources/shaders/fragment/solid-specular.frag

@@ -0,0 +1,49 @@
+#version 330
+// Color input from Vertex shader
+in vec4 vColor;
+in vec3 vNormal;
+in vec3 vPosition;
+
+// Final fragment fColor
+out vec4 fColor;
+
+// Light color RGB value
+uniform vec3 uLightColor;
+// Light object and camera position vectors
+uniform vec3 uLightPosition;
+uniform vec3 uCameraPosition;
+
+// Strength ranges 0.0f - 1.0f
+uniform float uAmbientStrength;  // 0.2f
+uniform float uSpecularStrength; // 0.25f
+// 32, 64, 128, 256
+uniform int uSpecularShine; // 64
+
+void main()
+{
+  // Ambient lighting
+  vec3 ambient = uAmbientStrength * uLightColor;
+
+  // Diffuse lighting
+  vec3 norm = normalize(vNormal);
+  vec3 lightDir = normalize(uLightPosition - vPosition);
+  float diff = max(dot(norm, lightDir), 0.0f);
+
+  vec3 diffuse = diff * uLightColor;
+
+  // Specular lighting
+  vec3 viewDir = normalize(uCameraPosition - vPosition);
+  vec3 reflectDir = reflect(-lightDir, norm);
+
+  float spec = pow(max(dot(viewDir, reflectDir), 0.0), uSpecularShine);
+  vec3 specular = uSpecularStrength * spec * uLightColor;
+
+  //
+  // Final calculation
+
+  // Strip vColor to vec3 to drop alpha
+  vec3 result = (ambient + specular) * vec3(vColor);
+
+  // Final output
+  fColor = vec4(result, 1.0f); // Reapply alpha
+}