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.cpp | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

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

diff --git a/gfx/gl/sceneShader.cpp b/gfx/gl/sceneShader.cpp
index 72cde91..43e54a5 100644
--- a/gfx/gl/sceneShader.cpp
+++ b/gfx/gl/sceneShader.cpp
@@ -1,4 +1,6 @@
 #include "sceneShader.h"
+#include <gfx/gl/shaders/billboard-frag.h>
+#include <gfx/gl/shaders/billboard-vert.h>
 #include <gfx/gl/shaders/dynamicPoint-vert.h>
 #include <gfx/gl/shaders/dynamicPointInst-vert.h>
 #include <gfx/gl/shaders/fixedPoint-vert.h>
@@ -30,7 +32,7 @@ inline void
 SceneShader::allPrograms(auto member, auto &&... ps) const
 {
 	for (const auto & prog : std::initializer_list<const SceneProgram *> {&basic, &basicInst, &water, &landmass,
-				 &absolute, &pointLightInst, &spotLightInst, &networkStraight, &networkCurve}) {
+				 &absolute, &pointLightInst, &spotLightInst, &networkStraight, &networkCurve, &billboard}) {
 		(prog->*member)(std::forward<decltype(ps)>(ps)...);
 	}
 }
@@ -89,6 +91,16 @@ SceneShader::BasicProgram::use(Location const & location) const
 	setModel(location);
 }
 
+SceneShader::BillboardProgram::BillboardProgram() : SceneProgram {billboard_vert, billboard_frag} { }
+
+void
+SceneShader::BillboardProgram::use(RelativeDistance size, RelativePosition3D centre) const
+{
+	Program::use();
+	glUniform(sizeLoc, size);
+	glUniform(centreLoc, centre);
+}
+
 void
 SceneShader::LandmassProgram::use(const glm::vec3 colourBias) const
 {
-- 
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