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#include <string.h>
#include <stdlib.h>
#ifdef WIN32
#include <windows.h>
#endif
#include <GL/gl.h>
#include "main/lighthandler.h"
#include "exception.h"
#include "demolib_prefs.h"
#if DEMOLIB_MAINLOOP
LightHandler::LightHandler(MainLoop *ml, const char *title, const char *elem, Hashtable *attr) :
Event(ml, title, elem, attr, "ambr:ambg:ambb:difr:difg:difb:specr:specg:specb:x:y:z:catt:latt:qatt")
{
this->positional = (strcmp(elem, "poslight") == 0);
this->light_num = GL_LIGHT0 + attr->get_int("num");
this->layer = -50.0f;
/* okay to set here, I suppose -- still a hack, though :-) */
float zero_light[] = { 0.0f, 0.0f, 0.0f, 1.0f };
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, zero_light);
}
LightHandler::~LightHandler()
{
}
void LightHandler::start_effect()
{
glEnable(light_num);
}
void LightHandler::draw_scene(float progress)
{
GLfloat ambient[] = {
this->get_val("ambr", progress),
this->get_val("ambg", progress),
this->get_val("ambb", progress),
1.0f
};
GLfloat diffuse[] = {
this->get_val("difr", progress),
this->get_val("difg", progress),
this->get_val("difb", progress),
1.0f
};
GLfloat specular[] = {
this->get_val("specr", progress),
this->get_val("specg", progress),
this->get_val("specb", progress),
1.0f
};
GLfloat position[] = {
this->get_val("x", progress),
this->get_val("y", progress),
this->get_val("z", progress),
positional ? 1.0f : 0.0f
};
GLfloat catt[] = { this->get_val("catt", progress) };
GLfloat latt[] = { this->get_val("latt", progress) };
GLfloat qatt[] = { this->get_val("qatt", progress) };
glLightfv(light_num, GL_AMBIENT, ambient);
glLightfv(light_num, GL_DIFFUSE, diffuse);
glLightfv(light_num, GL_SPECULAR, specular);
glLightfv(light_num, GL_POSITION, position);
glLightfv(light_num, GL_CONSTANT_ATTENUATION, catt);
glLightfv(light_num, GL_LINEAR_ATTENUATION, latt);
glLightfv(light_num, GL_QUADRATIC_ATTENUATION, qatt);
}
void LightHandler::end_effect()
{
glDisable(light_num);
}
#endif
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