From 9ecec749060a05705d7c7eb200949e17a84702a1 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sat, 28 Feb 2026 13:49:27 +0000
Subject: Add BillboardProgram to SceneShader

The implementation is overly simple/incomplete, I'm not even convince
what is there is right, but it's a decent start.
---
 gfx/gl/sceneShader.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'gfx/gl/sceneShader.h')

diff --git a/gfx/gl/sceneShader.h b/gfx/gl/sceneShader.h
index 47d4397..faba4a4 100644
--- a/gfx/gl/sceneShader.h
+++ b/gfx/gl/sceneShader.h
@@ -32,6 +32,17 @@ class SceneShader {
 		RequiredUniformLocation modelPosLoc {*this, "modelPos"};
 	};
 
+	class BillboardProgram : public SceneProgram {
+	public:
+		BillboardProgram();
+
+		void use(RelativeDistance size, RelativePosition3D centre) const;
+
+	private:
+		RequiredUniformLocation sizeLoc {*this, "size"};
+		RequiredUniformLocation centreLoc {*this, "centre"};
+	};
+
 	class AbsolutePosProgram : public SceneProgram {
 	public:
 		using Program::use;
@@ -74,6 +85,7 @@ public:
 	BasicProgram basic;
 	WaterProgram water;
 	AbsolutePosProgram basicInst, absolute, spotLightInst, pointLightInst;
+	BillboardProgram billboard;
 	LandmassProgram landmass;
 	NetworkProgram networkStraight, networkCurve;
 
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