learn: 14. Materials learnopengl book

1 files changed, 44 insertions, 0 deletions

diff --git a/shaders/color.fsh b/shaders/color.fsh
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+# version 330 core
+
+struct Material {
+    vec3 ambient;
+    vec3 diffuse;
+    vec3 specular;
+    float shininess;
+};
+
+struct Light {
+    vec3 position;
+    vec3 ambient;
+    vec3 diffuse;
+    vec3 specular;
+};
+
+in vec3 Normal;
+in vec3 FragPos;
+
+out vec4 FragColor;
+
+uniform vec3 viewPos;
+uniform Material material;
+uniform Light light;
+
+void main()
+{
+    // ambient
+    vec3 ambient = material.ambient * light.ambient;
+    
+    // diffuse
+    vec3 norm = normalize(Normal);
+    vec3 lightDir = normalize(light.position - FragPos);
+    float diff = max(dot(norm, lightDir), 0.0);
+    vec3 diffuse = light.diffuse * diff * material.diffuse;
+
+    // specular
+    vec3 viewDir = normalize(viewPos - FragPos);
+    vec3 reflectDir = reflect(-lightDir, norm);
+    float spec = pow(max(dot(viewDir, reflectDir), 0.0), material.shininess);
+    vec3 specular = light.specular * spec * material.specular;
+
+    FragColor = vec4((specular + ambient + diffuse), 1.0f);
+}