From: Mikko Rasa <tdb@tdb.fi>
Date: Thu, 8 May 2014 17:55:53 +0000 (+0300)
Subject: Don't store ProgramData in Lighting
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=ce657d3b7783db9f3450162fbf07210ea1c8c661

Don't store ProgramData in Lighting

It can't be kept up to date automatically, as Lighting can't track the
individual Lights' state.  It's also hard to make optimize out unnecessary
updates.  It's typically computed very few times per frame anyway, so the
performance hit is negligible (as opposed to something like Material,
which might get used hundreds or thousands of times per frame).
---

diff --git a/source/lighting.cpp b/source/lighting.cpp
index 515733a6..f5fbca6a 100644
--- a/source/lighting.cpp
+++ b/source/lighting.cpp
@@ -41,7 +41,7 @@ void Lighting::detach(unsigned i)
 		Light::unbind_from(i);
 }
 
-void Lighting::update_shader_data(const Matrix &view_matrix)
+void Lighting::update_shader_data(ProgramData &shdata, const Matrix &view_matrix) const
 {
 	shdata.uniform("ambient_color", ambient);
 	for(unsigned i=0; i<lights.size(); ++i)
diff --git a/source/lighting.h b/source/lighting.h
index 7c7dc454..593d8039 100644
--- a/source/lighting.h
+++ b/source/lighting.h
@@ -20,7 +20,6 @@ class Lighting: public Bindable<Lighting>
 private:
 	Color ambient;
 	std::vector<const Light *> lights;
-	ProgramData shdata;
 
 public:
 	Lighting();
@@ -31,8 +30,7 @@ public:
 	void attach(unsigned, const Light &);
 	void detach(unsigned);
 
-	void update_shader_data(const Matrix &);
-	const ProgramData &get_shader_data() const { return shdata; }
+	void update_shader_data(ProgramData &, const Matrix &) const;
 	void bind() const;
 
 	static void unbind();
diff --git a/source/renderer.cpp b/source/renderer.cpp
index af0d0873..606dd341 100644
--- a/source/renderer.cpp
+++ b/source/renderer.cpp
@@ -90,9 +90,7 @@ void Renderer::set_lighting(const Lighting *l)
 	state->lighting = l;
 	state->lighting_matrix = mtx_stack.top();
 	if(l)
-		/* XXX I'm not happy with this, but can't come up with anything better
-		right now. */
-		const_cast<Lighting *>(l)->update_shader_data(mtx_stack.top());
+		l->update_shader_data(standard_shdata, mtx_stack.top());
 	lighting_changed = true;
 }
 
@@ -246,8 +244,6 @@ void Renderer::apply_state()
 					nm(i, j) = m(i, j);
 			nm = transpose(invert(nm));
 			standard_shdata.uniform_matrix3("eye_obj_normal_matrix", &nm(0, 0));
-			if(state->lighting)
-				state->lighting->get_shader_data().apply();
 			if(state->material)
 				state->material->get_shader_data().apply();
 			standard_shdata.apply();