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.

1 files changed, 12 insertions, 0 deletions

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;