Learning cubemaps, added reflections

4 files changed, 53 insertions, 0 deletions

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);
+};