X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Flight.cpp;h=39693c4091a6b1579885bf79104ef60e38ca0426;hp=1570c5cd0c790840b1232dce96c6631dbbdefbf7;hb=f14435e58bfa0fa697a06ba9a454bb30cd37d9d8;hpb=832fb1872e6e5e664e2e5130122fd2f74729ed42

diff --git a/source/light.cpp b/source/light.cpp
index 1570c5cd..39693c40 100644
--- a/source/light.cpp
+++ b/source/light.cpp
@@ -1,11 +1,8 @@
-/* $Id$
-
-This file is part of libmspgl
-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 {
@@ -14,50 +11,114 @@ Light::Light():
 	ambient(0),
 	diffuse(1),
 	specular(1),
-	x(0), y(0), z(1), w(0),
-	sdx(0), sdy(0), sdz(-1),
+	position(0, 0, 1, 0),
+	spot_dir(0, 0, -1),
 	spot_exp(0),
 	spot_cutoff(180)
-{ }
+{
+	attenuation[0] = 1;
+	attenuation[1] = 0;
+	attenuation[2] = 0;
+}
 
 void Light::set_ambient(const Color &c)
 {
-	ambient=c;
+	ambient = c;
 }
 
 void Light::set_diffuse(const Color &c)
 {
-	diffuse=c;
+	diffuse = c;
 }
 
 void Light::set_specular(const Color &c)
 {
-	specular=c;
+	specular = c;
+}
+
+void Light::set_position(const Vector4 &p)
+{
+	position = p;
 }
 
-void Light::set_position(float x_, float y_, float z_, float w_)
+void Light::set_spot_direction(const Vector3 &d)
 {
-	x=x_;
-	y=y_;
-	z=z_;
-	w=w_;
+	spot_dir = d;
+}
+
+void Light::set_spot_exponent(float e)
+{
+	spot_exp = e;
+}
+
+void Light::set_spot_cutoff(float c)
+{
+	spot_cutoff = c;
+}
+
+void Light::set_attenuation(float c, float l, float q)
+{
+	attenuation[0] = c;
+	attenuation[1] = l;
+	attenuation[2] = q;
+}
+
+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, &position.x);
+		glLightfv(l, GL_SPOT_DIRECTION, &spot_dir.x);
+		glLightf(l, GL_SPOT_EXPONENT, spot_exp);
+		glLightf(l, GL_SPOT_CUTOFF, spot_cutoff);
+		glLightf(l, GL_CONSTANT_ATTENUATION, attenuation[0]);
+		glLightf(l, GL_LINEAR_ATTENUATION, attenuation[1]);
+		glLightf(l, GL_QUADRATIC_ATTENUATION, attenuation[2]);
+		current_lights[current_unit] = this;
+	}
+}
+
+void Light::bind_to(unsigned i) const
+{
+	activate(i);
+	bind();
+}
+
+void Light::activate(unsigned i)
+{
+	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()
+void Light::unbind()
 {
-	apply_to(current);
+	if(current_lights[current_unit])
+	{
+		disable(GL_LIGHT0+current_unit);
+		current_lights[current_unit] = 0;
+	}
 }
 
-void Light::apply_to(unsigned l)
+void Light::unbind_from(unsigned i)
 {
-	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);
+	activate(i);
+	unbind();
 }
 
-unsigned Light::current=0;
+unsigned Light::current_unit = 0;
+vector<const Light *> Light::current_lights(1);
 
 } // namespace GL
 } // namespace Msp