Add basics of materials

[opengl.git] / texturefrag.glsl

diff --git a/texturefrag.glsl b/texturefrag.glsl
new file mode 100644 (file)
index 0000000..347cc01
--- /dev/null
+++ b/texturefrag.glsl
@@ -0,0 +1,39 @@
+#version 330
+
+struct Material {
+       vec3 ambient;
+       vec3 diffuse;
+       vec3 specular;
+       float shininess;
+       bool hasTexture;
+};
+
+in vec3 normal;
+in vec3 fragPos;
+in vec2 texCoord;
+
+uniform vec3 lightPos;
+uniform vec3 viewPos;
+uniform vec4 lightColor;
+
+uniform Material material;
+uniform sampler2D tex;
+
+out vec4 FragColor;
+
+void main() {
+       vec3 lightDir = normalize(fragPos - lightPos);
+       vec3 diffuse = max(0, dot(-normal, lightDir)) * material.diffuse;
+
+       vec3 viewDir = normalize(fragPos - viewPos);
+       vec3 reflectDir = reflect(-lightDir, normal);
+       vec3 specular = pow(max(0, dot(viewDir, reflectDir)), material.shininess) * material.specular;
+
+       vec4 lighting = vec4(material.ambient + diffuse + specular, 1) * lightColor;
+
+       if (material.hasTexture)
+               FragColor = lighting * texture(tex, texCoord);
+       else
+               FragColor = lighting;
+}
+