From 6ea296d997e1fed60da8e84d6a0d75a942b58977 Mon Sep 17 00:00:00 2001
From: talha <talha@talhaamir.xyz>
Date: Tue, 16 Apr 2024 01:34:33 +0500
Subject: Learning cubemaps, added reflections

---
 source/shaders/cubemap.fs.glsl |  9 +++++++++
 source/shaders/cubemap.vs.glsl | 14 ++++++++++++++
 source/shaders/refl.fs.glsl    | 14 ++++++++++++++
 source/shaders/refl.vs.glsl    | 16 ++++++++++++++++
 4 files changed, 53 insertions(+)
 create mode 100644 source/shaders/cubemap.fs.glsl
 create mode 100644 source/shaders/cubemap.vs.glsl
 create mode 100644 source/shaders/refl.fs.glsl
 create mode 100644 source/shaders/refl.vs.glsl

(limited to 'source/shaders')

diff --git a/source/shaders/cubemap.fs.glsl b/source/shaders/cubemap.fs.glsl
new file mode 100644
index 0000000..72dfe4c
--- /dev/null
+++ b/source/shaders/cubemap.fs.glsl
@@ -0,0 +1,9 @@
+#version 330 core
+
+in vec3 TexCoords;
+uniform samplerCube skybox;
+out vec4 FragColor;
+
+void main() {
+  FragColor = texture(skybox, TexCoords);
+};
diff --git a/source/shaders/cubemap.vs.glsl b/source/shaders/cubemap.vs.glsl
new file mode 100644
index 0000000..956673a
--- /dev/null
+++ b/source/shaders/cubemap.vs.glsl
@@ -0,0 +1,14 @@
+#version 330 core
+layout(location=0) in vec3 aPos;
+
+uniform mat4 Model;
+uniform mat4 View;
+uniform mat4 Projection;
+
+out vec3 TexCoords;
+
+void main() {
+  vec4 pos = Projection*View*vec4(aPos, 1.0);
+  gl_Position = vec4(pos.xyww);
+  TexCoords = aPos;
+};
diff --git a/source/shaders/refl.fs.glsl b/source/shaders/refl.fs.glsl
new file mode 100644
index 0000000..6d28392
--- /dev/null
+++ b/source/shaders/refl.fs.glsl
@@ -0,0 +1,14 @@
+#version 330 core
+
+in vec3 Normal;
+in vec3 Position;
+
+uniform samplerCube skybox;
+uniform vec3 cameraPos;
+out vec4 FragColor;
+
+void main() {
+  vec3 I = normalize(Position - cameraPos);
+  vec3 R = reflect(I, normalize(Normal)); 
+  FragColor = vec4(texture(skybox, R).rgb, 1.0);
+};
diff --git a/source/shaders/refl.vs.glsl b/source/shaders/refl.vs.glsl
new file mode 100644
index 0000000..b8f2b97
--- /dev/null
+++ b/source/shaders/refl.vs.glsl
@@ -0,0 +1,16 @@
+#version 330 core
+layout(location=0) in vec3 aPos;
+layout(location=1) in vec3 aNormal;
+
+uniform mat4 View;
+uniform mat4 Model;
+uniform mat4 Projection;
+
+out vec3 Normal;
+out vec3 Position;
+
+void main() {
+  Normal = mat3(transpose(inverse(Model))) * aNormal;
+  Position = vec3(Model * vec4(aPos, 1.0));
+  gl_Position = Projection * View * Model * vec4(aPos, 1.0);
+};
-- 
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