Implement sun for program "textured"

data/shaders/textured.vert

@@ -7,10 +7,11 @@ varying float light_weight;
 
 uniform mat4 mvp;
 uniform mat3 local_modelview;
+uniform vec3 sun_direction;
 
 void main(void) {
   gl_Position = mvp * position;
   f_tex_coord = tex_coord;
   vec3 transformed_normal = local_modelview * normal;
-  light_weight = max(dot(transformed_normal, vec3(0.0, 1.0, 0.0)), 0.0);
+  light_weight = max(dot(transformed_normal, -sun_direction), 0.0);
 }

src/model/static.cpp

@@ -2,6 +2,7 @@
 
 #include "../mtllib.hpp"
 #include "../program.hpp"
+#include "../scene.hpp"
 
 #include <vector>
 #include <fstream>
@@ -21,6 +22,7 @@ const GLchar *const Static::attribs[] = {
 const GLchar *const Static::uniforms[] = {
   "mvp",
   "local_modelview",
+  "sun_direction",
 };
 
 const std::string Static::filename(const std::string &name)
@@ -133,6 +135,8 @@ void Static::draw(const Scene &scene, const glm::mat4 &mvp, const glm::mat4 &tra
   const glm::mat3 local_modelview = glm::transpose(glm::inverse(glm::mat3(transformation)));
   glUniformMatrix3fv(exe->uniform(Uniform::local_modelview), 1, GL_FALSE, glm::value_ptr(local_modelview));
 
+  glUniform3fv(exe->uniform(Uniform::sun_direction), 1, glm::value_ptr(scene.sun()->direction));
+
   _material->use();
 
   glEnableVertexAttribArray(position);

src/model/static.hpp

@@ -41,6 +41,7 @@ namespace Models
     {
       mvp,
       local_modelview,
+      sun_direction,
 
       __uniform_count
     };