From 37e603085675aca97f94cce66fcd5d0fa3d50b1a Mon Sep 17 00:00:00 2001
From: nathan <nathansmith@disroot.org>
Date: Sun, 27 Jul 2025 05:42:51 -0600
Subject: Skybox working

---
 assets/shaders/glsl100/skybox.fs | 31 +++++++++++++++++++++++++++++++
 assets/shaders/glsl100/skybox.vs | 24 ++++++++++++++++++++++++
 2 files changed, 55 insertions(+)
 create mode 100644 assets/shaders/glsl100/skybox.fs
 create mode 100644 assets/shaders/glsl100/skybox.vs

(limited to 'assets/shaders/glsl100')

diff --git a/assets/shaders/glsl100/skybox.fs b/assets/shaders/glsl100/skybox.fs
new file mode 100644
index 0000000..0ea6876
--- /dev/null
+++ b/assets/shaders/glsl100/skybox.fs
@@ -0,0 +1,31 @@
+#version 100
+
+precision mediump float;
+
+// Input vertex attributes (from vertex shader)
+varying vec3 fragPosition;
+
+// Input uniform values
+uniform samplerCube environmentMap;
+uniform bool vflipped;
+uniform bool doGamma;
+
+void main()
+{
+    // Fetch color from texture map
+    vec4 texelColor = vec4(0.0);
+
+    if (vflipped) texelColor = textureCube(environmentMap, vec3(fragPosition.x, -fragPosition.y, fragPosition.z));
+    else texelColor = textureCube(environmentMap, fragPosition);
+
+    vec3 color = vec3(texelColor.x, texelColor.y, texelColor.z);
+
+    if (doGamma) // Apply gamma correction
+    {
+        color = color/(color + vec3(1.0));
+        color = pow(color, vec3(1.0/2.2));
+    }
+
+    // Calculate final fragment color
+    gl_FragColor = vec4(color, 1.0);
+}
diff --git a/assets/shaders/glsl100/skybox.vs b/assets/shaders/glsl100/skybox.vs
new file mode 100644
index 0000000..e440ace
--- /dev/null
+++ b/assets/shaders/glsl100/skybox.vs
@@ -0,0 +1,24 @@
+#version 100
+
+// Input vertex attributes
+attribute vec3 vertexPosition;
+
+// Input uniform values
+uniform mat4 matProjection;
+uniform mat4 matView;
+
+// Output vertex attributes (to fragment shader)
+varying vec3 fragPosition;
+
+void main()
+{
+    // Calculate fragment position based on model transformations
+    fragPosition = vertexPosition;
+
+    // Remove translation from the view matrix
+    mat4 rotView = mat4(mat3(matView));
+    vec4 clipPos = matProjection*rotView*vec4(vertexPosition, 1.0);
+
+    // Calculate final vertex position
+    gl_Position = clipPos;
+}
-- 
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