X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Flight.cpp;h=a3b3d014c0a51a16762c7a82285f4a6a8960247c;hp=5b0fa1d768c0601112ebf9dc91313a961ab49949;hb=0ab875bdc9fbf84ecfce883b188410bb45882447;hpb=c1405286754104ddc044dddbb0a3505a9a5e3d4a

diff --git a/source/light.cpp b/source/light.cpp
index 5b0fa1d7..a3b3d014 100644
--- a/source/light.cpp
+++ b/source/light.cpp
@@ -1,65 +1,143 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
+#include <stdexcept>
+#include <msp/gl/extensions/msp_legacy_features.h>
+#include <msp/strings/format.h>
 #include "light.h"
+#include "lightunit.h"
+#include "matrix.h"
 #include "misc.h"
+#include "programdata.h"
+
+using namespace std;
 
 namespace Msp {
 namespace GL {
 
 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;
+}
+
+Light::~Light()
+{
+	while(LightUnit *unit = LightUnit::find_unit(this))
+		unbind_from(unit->get_index());
+}
 
-void Light::set_ambient(const Color &c)
+void Light::update_parameter(int mask, int index) const
 {
-	ambient=c;
+	if(index<0)
+	{
+		LightUnit *unit = LightUnit::find_unit(this);
+		if(!unit)
+			return;
+
+		index = unit->get_index();
+	}
+
+	GLenum l = GL_LIGHT0+index;
+	if(mask&DIFFUSE)
+		glLightfv(l, GL_DIFFUSE, &diffuse.r);
+	if(mask&SPECULAR)
+		glLightfv(l, GL_SPECULAR, &specular.r);
+	if(mask&POSITION)
+		glLightfv(l, GL_POSITION, &position.x);
+	if(mask&SPOT_DIR)
+		glLightfv(l, GL_SPOT_DIRECTION, &spot_dir.x);
+	if(mask&SPOT_EXP)
+		glLightf(l, GL_SPOT_EXPONENT, spot_exp);
+	if(mask&SPOT_CUTOFF)
+		glLightf(l, GL_SPOT_CUTOFF, spot_cutoff);
+	if(mask&ATTENUATION)
+	{
+		glLightf(l, GL_CONSTANT_ATTENUATION, attenuation[0]);
+		glLightf(l, GL_LINEAR_ATTENUATION, attenuation[1]);
+		glLightf(l, GL_QUADRATIC_ATTENUATION, attenuation[2]);
+	}
 }
 
 void Light::set_diffuse(const Color &c)
 {
-	diffuse=c;
+	diffuse = c;
+	update_parameter(DIFFUSE);
 }
 
 void Light::set_specular(const Color &c)
 {
-	specular=c;
+	specular = c;
+	update_parameter(SPECULAR);
+}
+
+void Light::set_position(const Vector4 &p)
+{
+	position = p;
+	update_parameter(POSITION);
+}
+
+void Light::set_spot_direction(const Vector3 &d)
+{
+	spot_dir = d;
+	update_parameter(SPOT_DIR);
+}
+
+void Light::set_spot_exponent(float e)
+{
+	spot_exp = e;
+	update_parameter(SPOT_EXP);
+}
+
+void Light::set_spot_cutoff(float c)
+{
+	spot_cutoff = c;
+	update_parameter(SPOT_CUTOFF);
 }
 
-void Light::set_position(float x_, float y_, float z_, float w_)
+void Light::set_attenuation(float c, float l, float q)
 {
-	x=x_;
-	y=y_;
-	z=z_;
-	w=w_;
+	attenuation[0] = c;
+	attenuation[1] = l;
+	attenuation[2] = q;
+	update_parameter(ATTENUATION);
 }
 
-void Light::apply() const
+void Light::update_shader_data(ProgramData &shdata, const Matrix &view_matrix, unsigned i) const
 {
-	apply_to(current);
+	string base = format("light_sources[%d]", i);
+	shdata.uniform(base+".position", view_matrix*position);
+	shdata.uniform(base+".diffuse", diffuse);
+	shdata.uniform(base+".specular", specular);
 }
 
-void Light::apply_to(unsigned l) const
+void Light::bind_to(unsigned i) const
 {
-	l+=GL_LIGHT0;
-	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);
+	static Require _req(MSP_legacy_features);
+
+	LightUnit &unit = LightUnit::get_unit(i);
+	if(unit.set_light(this))
+	{
+		enable(GL_LIGHT0+unit.get_index());
+		update_parameter(-1, unit.get_index());
+	}
 }
 
-unsigned Light::current=0;
+const Light *Light::current(unsigned i)
+{
+	return LightUnit::get_unit(i).get_light();
+}
+
+void Light::unbind_from(unsigned i)
+{
+	LightUnit &unit = LightUnit::get_unit(i);
+	if(unit.set_light(0))
+		disable(GL_LIGHT0+unit.get_index());
+}
 
 } // namespace GL
 } // namespace Msp