From ae9087aea7aa2b19bf78daa6593d14dfba98183d Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Wed, 28 Aug 2024 03:48:19 +0100
Subject: Initial cut of shadow map creation with support for billboard shadows

---
 gfx/gl/shaders/shadowDynamicPointStencil.fs | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 gfx/gl/shaders/shadowDynamicPointStencil.fs

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

diff --git a/gfx/gl/shaders/shadowDynamicPointStencil.fs b/gfx/gl/shaders/shadowDynamicPointStencil.fs
new file mode 100644
index 0000000..57b8aa3
--- /dev/null
+++ b/gfx/gl/shaders/shadowDynamicPointStencil.fs
@@ -0,0 +1,16 @@
+#version 330 core
+#extension GL_ARB_shading_language_420pack : enable
+
+layout(binding = 0) uniform sampler2D stencilDepth;
+flat in vec3 scale;
+in vec2 texCoord;
+
+void
+main()
+{
+	float stDepth = texture(stencilDepth, texCoord).r;
+	if (stDepth >= 1) {
+		discard;
+	}
+	gl_FragDepth = gl_FragCoord.z + (stDepth * scale.z);
+}
-- 
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