From ffdaa93edf5eeaf9db7dc17e51554a77dd9d596d Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sat, 19 Nov 2022 15:04:30 +0000
Subject: Separate out the illumation of the scene

---
 gfx/gl/shaders/directionalLight.fs | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 gfx/gl/shaders/directionalLight.fs

(limited to 'gfx/gl/shaders/directionalLight.fs')

diff --git a/gfx/gl/shaders/directionalLight.fs b/gfx/gl/shaders/directionalLight.fs
new file mode 100644
index 0000000..7562f96
--- /dev/null
+++ b/gfx/gl/shaders/directionalLight.fs
@@ -0,0 +1,18 @@
+#version 330 core
+#extension GL_ARB_shading_language_420pack : enable
+
+out vec3 FragColor;
+
+in vec2 TexCoords;
+
+layout(binding = 1) uniform sampler2D gNormal;
+
+uniform vec3 lightDirection;
+uniform vec3 lightColour;
+
+void
+main()
+{
+	const vec3 Normal = texture(gNormal, TexCoords).rgb;
+	FragColor = dot(-lightDirection, Normal) * lightColour;
+}
-- 
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