add blinn-phong lighting demo

1 files changed, 6 insertions, 1 deletions

diff --git a/demo.vs b/demo.vs
index 37fe02f..c1ec38f 100644
--- a/demo.vs
+++ b/demo.vs
@@ -1,11 +1,14 @@
 #version 330 core
 layout (location = 0) in vec3 position;
-layout (location = 1) in vec3 normal;
+layout (location = 1) in vec3 in_normal;
 layout (location = 2) in vec2 texCoord;
 
 out vec2 texture_coordinate;
+out vec3 normal;
+out vec3 fragment_position;
 
 uniform mat4 model;
+uniform mat3 normal_mat;
 uniform mat4 view;
 uniform mat4 projection;
 
@@ -13,4 +16,6 @@ void main()
 {
   gl_Position = projection * view * model * vec4(position.xyz, 1.0);
   texture_coordinate = texCoord;
+  normal = mat3(view) * normal_mat * in_normal;
+  fragment_position = vec3(view * model * vec4(position.xyz, 1.0));
 }
\ No newline at end of file