Changeset f7d35da in opengl-game for color.frag

Timestamp:

Jun 10, 2018, 9:31:48 PM (8 years ago)

Author:

Dmitry Portnoy <dmp1488@…>

Branches:

feature/imgui-sdl, master, points-test

Children:

5c403fe

Parents:

0d5c100

Message:

Add a system to keep track of which keys are pressed or held down and add another light source to help illuminate the scene from different directions.

File:

• color.frag (modified) (2 diffs)

color.frag

@@ -1 +1 @@
 #version 410
 
-in vec3 position_eye, normal_eye, color, light_position_eye;
+in vec3 position_eye, normal_eye, color, light_position_eye, light2_position_eye;
 
 out vec4 frag_color;
@@ -24 +24 @@
 
   // diffuse intensity
-  vec3 Id = Ls * color * dot_prod;
+  vec3 Id = Ld * color * dot_prod;
+
+  vec3 direction_to_light2_eye = normalize(light2_position_eye - position_eye);
+  float dot_prod2 = max(dot(direction_to_light2_eye, normal_eye), 0.0);
+
+  // diffuse intensity
+  vec3 Id2 = Ld * color * dot_prod2;
+
+  vec3 surface_to_viewer_eye = normalize(-position_eye);
 
   vec3 reflection_eye = reflect(-direction_to_light_eye, normal_eye);
-  vec3 surface_to_viewer_eye = normalize(-position_eye);
   float dot_prod_specular = max(dot(reflection_eye, surface_to_viewer_eye), 0.0);
   float specular_factor = pow(dot_prod_specular, specular_exponent);
 
+  vec3 reflection_eye2 = reflect(-direction_to_light2_eye, normal_eye);
+  float dot_prod_specular2 = max(dot(reflection_eye2, surface_to_viewer_eye), 0.0);
+  float specular_factor2 = pow(dot_prod_specular2, specular_exponent);
+
   // specular intensity
   vec3 Is = Ls * Ks * specular_factor;
+  vec3 Is2 = Ls * Ks * specular_factor2;
 
-  frag_color = vec4(Is + Id + Ia, 1.0);
+  frag_color = vec4(Is + Id + Ia + Is2 + Id2, 1.0);
 }