Add shaders for lighting

4 files changed, 41 insertions, 4 deletions

diff --git a/shaders/phong.frag.glsl b/shaders/phong.frag.glsl
new file mode 100644
index 0000000..a1a0645
--- /dev/null
+++ b/shaders/phong.frag.glsl
@@ -0,0 +1,20 @@
+#version 330 core
+
+in vec3 o_normal;
+in vec3 o_frag_pos;
+
+out vec4 fragColour;
+
+uniform vec3 light_pos;
+
+void main() {
+    vec3 ambient = vec3(0.2, 0.2, 0.2);
+    vec3 light_colour = vec3(1.0, 1.0, 1.0);
+    vec3 object_colour = vec3(0.5, 0.2, 0.8);
+    vec3 norm = normalize(o_normal);
+    vec3 light_dir = normalize(light_pos - o_frag_pos);
+    float diff = max(dot(norm, light_dir), 0.0);
+    vec3 diffuse = diff * light_colour;
+    vec3 result = (ambient + diffuse) * object_colour;
+    fragColour = vec4(result, 1.0);
+}
diff --git a/shaders/phong.vert.glsl b/shaders/phong.vert.glsl
new file mode 100644
index 0000000..589ccbe
--- /dev/null
+++ b/shaders/phong.vert.glsl
@@ -0,0 +1,17 @@
+#version 330 core
+
+in vec3 position;
+in vec3 normal;
+
+out vec3 o_normal;
+out vec3 o_frag_pos;
+
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+
+void main() {
+    gl_Position = projection * view * model * vec4(position, 1.0);
+    o_normal = normal;
+    o_frag_pos = vec3(model * vec4(position, 1.0));
+}
diff --git a/shaders/triangle.frag b/shaders/triangle.frag.glsl
index 23f2f59..4a7400f 100644
--- a/shaders/triangle.frag
+++ b/shaders/triangle.frag.glsl
@@ -1,4 +1,4 @@
-#version 150
+#version 330 core
 
 uniform vec4 ourColour;
 
diff --git a/shaders/triangle.vert b/shaders/triangle.vert.glsl
index 939f4a4..8ce4dc9 100644
--- a/shaders/triangle.vert
+++ b/shaders/triangle.vert.glsl
@@ -1,13 +1,13 @@
-#version 150
+#version 330 core
 
 in vec3 position;
 
+out vec4 colour;
+
 uniform mat4 model;
 uniform mat4 view;
 uniform mat4 projection;
 
-out vec4 colour;
-
 void main()
 {
     gl_Position = projection * view * model * vec4(position, 1.0);