Add model loading and simple phong color shading

shaders/mesh-fragment.glsl

@@ -0,0 +1,46 @@
+#version 330 core
+
+struct Material {
+	sampler2D diffuse0;
+	sampler2D diffuse1;
+	sampler2D diffuse2;
+	sampler2D diffuse3;
+	sampler2D specular0;
+	sampler2D specular1;
+	sampler2D specular2;
+	sampler2D specular3;
+};
+
+out vec4 fragmentColor;
+in vec3 Normal;
+in vec3 FragPos;
+in vec2 TexCoord;
+in vec3 ViewPos;
+uniform Material material;
+
+void main()
+{
+	const vec3 light_direction = vec3(-1.0, -1.0, -1.0);
+	const vec3 light_color = vec3(1.0, 1.0, 1.0);
+	const float light_amb = 0.1;
+	const float light_spec = 0.4;
+	const float light_diff = 0.7;
+
+	vec3 diffuseTexCol = vec3(texture(material.diffuse0, TexCoord));
+	vec3 specularTexCol = vec3(texture(material.specular0, TexCoord));
+
+	vec3 normal_n = normalize(Normal);
+	vec3 light_dir_n = normalize(light_direction);
+
+	vec3 view_dir = normalize(ViewPos - FragPos);
+	vec3 reflect_dir = reflect(light_dir_n, normal_n);
+	float shine = pow(max(dot(view_dir, reflect_dir), 0.0), 35);
+
+	vec3 ambient_light = light_amb * diffuseTexCol * light_color;
+	vec3 diffuse_light = max(dot(normal_n, -light_dir_n), 0.0) *light_diff * diffuseTexCol * light_color;
+	vec3 specular_light = shine * light_spec * specularTexCol * light_color;
+
+	vec3 color = ambient_light + diffuse_light + specular_light;
+
+	fragmentColor = vec4(color, 1.0);
+}

shaders/mesh-vertex.glsl

@@ -0,0 +1,24 @@
+#version 330 core
+
+layout (location = 0) in vec3 aInputPosition;
+layout (location = 1) in vec3 aInputNormal;
+layout (location = 2) in vec2 aTextureCoord;
+
+uniform mat4 model_matrix;
+uniform mat4 normal_matrix;
+uniform mat4 projection_view_matrix;
+uniform vec3 camera_position;
+
+out vec3 Normal;
+out vec3 FragPos;
+out vec2 TexCoord;
+out vec3 ViewPos;
+
+void main()
+{
+	gl_Position = projection_view_matrix * model_matrix * vec4(aInputPosition, 1.0);
+	Normal = vec3(normal_matrix * vec4(aInputNormal, 0.0));
+	FragPos = vec3(model_matrix * vec4(aInputPosition, 1.0));
+	TexCoord = aTextureCoord;
+	ViewPos = camera_position;
+}