X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Flight.cpp;h=899e22c9853d964ed7c0a591d4585cbfb2591c0c;hb=efe80f5a696b4a3be2378dc6d635c89676afa12d;hp=1570c5cd0c790840b1232dce96c6631dbbdefbf7;hpb=832fb1872e6e5e664e2e5130122fd2f74729ed42;p=libs%2Fgl.git

diff --git a/source/light.cpp b/source/light.cpp
index 1570c5cd..899e22c9 100644
--- a/source/light.cpp
+++ b/source/light.cpp
@@ -5,7 +5,11 @@ Copyright © 2007  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
+#include "except.h"
 #include "light.h"
+#include "misc.h"
+
+using namespace std;
 
 namespace Msp {
 namespace GL {
@@ -43,21 +47,50 @@ void Light::set_position(float x_, float y_, float z_, float w_)
 	w=w_;
 }
 
-void Light::apply()
+void Light::bind() const
+{
+	if(current_lights[current_unit]!=this)
+	{
+		GLenum l=GL_LIGHT0+current_unit;
+		enable(l);
+		glLightfv(l, GL_AMBIENT, &ambient.r);
+		glLightfv(l, GL_DIFFUSE, &diffuse.r);
+		glLightfv(l, GL_SPECULAR, &specular.r);
+		glLightfv(l, GL_POSITION, &x);
+		current_lights[current_unit]=this;
+	}
+}
+
+void Light::bind_to(unsigned i) const
+{
+	activate(i);
+	bind();
+}
+
+void Light::activate(unsigned i)
 {
-	apply_to(current);
+	static unsigned max_lights=get_i(GL_MAX_LIGHTS);
+
+	if(i>=max_lights)
+		throw InvalidParameterValue("Light unit index out of range");
+
+	if(i>=current_lights.size())
+		current_lights.resize(i+1);
+
+	current_unit=i;
 }
 
-void Light::apply_to(unsigned l)
+void Light::unbind()
 {
-	l+=GL_LIGHT0;
-	glLightfv(l, GL_AMBIENT, &ambient.r);
-	glLightfv(l, GL_DIFFUSE, &diffuse.r);
-	glLightfv(l, GL_SPECULAR, &specular.r);
-	glLightfv(l, GL_POSITION, &x);
+	if(current_lights[current_unit])
+	{
+		disable(GL_LIGHT0+current_unit);
+		current_lights[current_unit]=0;
+	}
 }
 
-unsigned Light::current=0;
+unsigned Light::current_unit=0;
+vector<const Light *> Light::current_lights(1);
 
 } // namespace GL
 } // namespace Msp