Drop Id tags and copyright notices from files

[libs/gl.git] / source / light.cpp

diff --git a/source/light.cpp b/source/light.cpp
index 899e22c9853d964ed7c0a591d4585cbfb2591c0c..39693c4091a6b1579885bf79104ef60e38ca0426 100644 (file)
--- a/source/light.cpp
+++ b/source/light.cpp
@@ -1,10 +1,3 @@
-/* $Id$
-
-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"
@@ -18,46 +11,75 @@ 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_spot_direction(const Vector3 &d)
+{
+       spot_dir = d;
 }
 
-void Light::set_position(float x_, float y_, float z_, float w_)
+void Light::set_spot_exponent(float e)
 {
-       x=x_;
-       y=y_;
-       z=z_;
-       w=w_;
+       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;
+               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;
+               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;
        }
 }
 
@@ -69,7 +91,7 @@ void Light::bind_to(unsigned i) const
 
 void Light::activate(unsigned i)
 {
-       static unsigned max_lights=get_i(GL_MAX_LIGHTS);
+       static unsigned max_lights = get_i(GL_MAX_LIGHTS);
 
        if(i>=max_lights)
                throw InvalidParameterValue("Light unit index out of range");
@@ -77,7 +99,7 @@ void Light::activate(unsigned i)
        if(i>=current_lights.size())
                current_lights.resize(i+1);
 
-       current_unit=i;
+       current_unit = i;
 }
 
 void Light::unbind()
@@ -85,11 +107,17 @@ void Light::unbind()
        if(current_lights[current_unit])
        {
                disable(GL_LIGHT0+current_unit);
-               current_lights[current_unit]=0;
+               current_lights[current_unit] = 0;
        }
 }
 
-unsigned Light::current_unit=0;
+void Light::unbind_from(unsigned i)
+{
+       activate(i);
+       unbind();
+}
+
+unsigned Light::current_unit = 0;
 vector<const Light *> Light::current_lights(1);
 
 } // namespace GL