From 1e08193a1678675ac5869b76e8a2339f6de5b773 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Thu, 26 Feb 2026 18:04:06 +0000
Subject: Support for the BillboardPainter

Based on the ShadowStenciller, creates flattened images of a model for
simplified mass use in a scene.
---
 gfx/gl/shaders/billboardPainter.frag | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 gfx/gl/shaders/billboardPainter.frag

(limited to 'gfx/gl/shaders/billboardPainter.frag')

diff --git a/gfx/gl/shaders/billboardPainter.frag b/gfx/gl/shaders/billboardPainter.frag
new file mode 100644
index 0000000..354f2ab
--- /dev/null
+++ b/gfx/gl/shaders/billboardPainter.frag
@@ -0,0 +1,22 @@
+#version 460 core
+
+layout(binding = 0) uniform sampler2D textureAlbedo;
+layout(location = 0) out vec4 bNormal;
+layout(location = 1) out vec4 bAlbedoSpec;
+
+include(`materialDetail.glsl')
+include(`materialCommon.glsl')
+in vec2 gTexCoords;
+in vec3 gNormal;
+in vec4 gColour;
+flat in MaterialDetail gMaterial;
+
+void
+main()
+{
+	vec4 textureColour = getTextureColour(gMaterial, gTexCoords);
+	float opaque = step(0.5, mix(textureColour.a, 1, gColour.a));
+	bNormal = vec4(gNormal, opaque);
+	gl_FragDepth = mix(1.0, gl_FragCoord.z, opaque);
+	bAlbedoSpec = mix(textureColour, vec4(gColour.rgb, 1), gColour.a);
+}
-- 
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