From 9d10826ccb5d1f8a3821d4d2f4242c401146d12d Mon Sep 17 00:00:00 2001
From: Patrick Schönberger
Date: Tue, 2 Feb 2021 23:18:31 +0100
Subject: render to framebufer

---
 shaders/fbo_frag.glsl | 13 +++++++++++++
 shaders/fbo_vert.glsl | 11 +++++++++++
 shaders/frag.glsl     | 11 +++++++++--
 shaders/vert.glsl     |  2 +-
 4 files changed, 34 insertions(+), 3 deletions(-)
 create mode 100644 shaders/fbo_frag.glsl
 create mode 100644 shaders/fbo_vert.glsl

(limited to 'shaders')

diff --git a/shaders/fbo_frag.glsl b/shaders/fbo_frag.glsl
new file mode 100644
index 0000000..cf1fafa
--- /dev/null
+++ b/shaders/fbo_frag.glsl
@@ -0,0 +1,13 @@
+#version 330 core
+out vec4 FragColor;
+  
+in vec2 TexCoords;
+
+uniform sampler2D screenTexture;
+
+void main()
+{ 
+    FragColor = vec4(
+        texture(screenTexture, TexCoords).rgb,
+        1.0);
+}
diff --git a/shaders/fbo_vert.glsl b/shaders/fbo_vert.glsl
new file mode 100644
index 0000000..fb80df5
--- /dev/null
+++ b/shaders/fbo_vert.glsl
@@ -0,0 +1,11 @@
+#version 330 core
+layout (location = 0) in vec2 aPos;
+layout (location = 1) in vec2 aTexCoords;
+
+out vec2 TexCoords;
+
+void main()
+{
+    gl_Position = vec4(aPos.x, aPos.y, 0.0, 1.0); 
+    TexCoords = aTexCoords;
+}
diff --git a/shaders/frag.glsl b/shaders/frag.glsl
index a92699c..a70915a 100644
--- a/shaders/frag.glsl
+++ b/shaders/frag.glsl
@@ -8,6 +8,7 @@ out vec4 FragColor;
 uniform vec3 objectColor;
 uniform vec3 lightColor;
 uniform vec3 lightPos;
+uniform vec3 viewPos;
 
 void main()
 {
@@ -20,6 +21,12 @@ void main()
   float ambientStrength = 0.1;
   vec3 ambient = ambientStrength * lightColor;
 
-  vec3 result = (ambient + diffuse) * objectColor;
+  float specularStrength = 0.5;
+  vec3 viewDir = normalize(viewPos - FragPos);
+  vec3 reflectDir = reflect(-lightDir, norm);
+  float spec = pow(max(dot(viewDir, reflectDir), 0.0), 32);
+  vec3 specular = specularStrength * spec * lightColor;
+
+  vec3 result = (ambient + diffuse + specular) * objectColor;
   FragColor = vec4(result, 1.0f);
-}
\ No newline at end of file
+}
diff --git a/shaders/vert.glsl b/shaders/vert.glsl
index fc3721a..6f48573 100644
--- a/shaders/vert.glsl
+++ b/shaders/vert.glsl
@@ -15,4 +15,4 @@ void main()
   gl_Position = projection * view * model * vec4(pos, 1.0);
   FragPos = vec3(model * vec4(pos, 1));
   Normal = normal;
-}
\ No newline at end of file
+}
-- 
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