//
-// light.hxx -- lighting routines
+// light.cxx -- lighting routines
//
// Written by Curtis Olson, started April 1998.
//
#include <simgear/math/interpolater.hxx>
#include <simgear/math/polar3d.hxx>
#include <simgear/misc/sg_path.hxx>
+#include <simgear/screen/colors.hxx>
#include <simgear/sky/sky.hxx>
-#include <Aircraft/aircraft.hxx>
#include <Main/globals.hxx>
#include <Main/viewer.hxx>
#include "sunpos.hxx"
extern SGSky *thesky; // FIXME: from main.cxx
-
fgLIGHT cur_light_params;
// update lighting parameters based on current sun position
void fgLIGHT::Update( void ) {
- FGInterface *f;
// if the 4th field is 0.0, this specifies a direction ...
GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
// base sky color
-#if defined (sgi) || defined( macintosh )
- GLfloat base_sky_color[4] = { 0.252, 0.403, 0.657, 1.0 };
-#else // default
- GLfloat base_sky_color[4] = { 0.336, 0.406, 0.574, 1.0 };
-#endif
- GLfloat base_fog_color[4] = { 0.80, 0.83, 1.0, 1.0 };
- double deg, ambient, diffuse, specular, sky_brightness;
-
- f = current_aircraft.fdm_state;
+ GLfloat base_sky_color[4] = { 0.39, 0.50, 0.74, 1.0 };
+ // base fog color
+ GLfloat base_fog_color[4] = { 0.84, 0.87, 1.0, 1.0 };
+ float deg, ambient, diffuse, specular, sky_brightness;
SG_LOG( SG_EVENT, SG_INFO, "Updating light parameters." );
sky_color[1] = base_sky_color[1] * sky_brightness;
sky_color[2] = base_sky_color[2] * sky_brightness;
sky_color[3] = base_sky_color[3];
-
- // set cloud color
- cloud_color[0] = base_fog_color[0] * sky_brightness;
- cloud_color[1] = base_fog_color[1] * sky_brightness;
- cloud_color[2] = base_fog_color[2] * sky_brightness;
- cloud_color[3] = base_fog_color[3];
-
- // set fog color
- float *sun_color = thesky->get_sun_color();
- fog_color[0] = cloud_color[0] * (1.25 - sun_color[0]/4.0); // 100% red
- fog_color[1] = cloud_color[1] * (0.48 + sun_color[1]/1.923); // 40% green
- fog_color[2] = cloud_color[2] * sun_color[2]; // 0% blue
- fog_color[3] = cloud_color[3];
+ gamma_correct_rgb( sky_color );
+
+ // set cloud and fog color
+ cloud_color[0] = fog_color[0] = base_fog_color[0] * sky_brightness;
+ cloud_color[1] = fog_color[1] = base_fog_color[1] * sky_brightness;
+ cloud_color[2] = fog_color[2] = base_fog_color[2] * sky_brightness;
+ cloud_color[3] = fog_color[3] = base_fog_color[3];
+ gamma_correct_rgb( fog_color );
+
+ // adjust the cloud colors for sunrise/sunset effects (darken them)
+ if (sun_angle > 1.0) {
+ float sun2 = pow(sun_angle, 0.5);
+ cloud_color[0] /= sun2;
+ cloud_color[1] /= sun2;
+ cloud_color[2] /= sun2;
+ }
+ gamma_correct_rgb( cloud_color );
}
// calculate fog color adjusted for sunrise/sunset effects
void fgLIGHT::UpdateAdjFog( void ) {
- FGInterface *f;
- double sun_angle_deg, rotation, param1[3], param2[3];
- f = current_aircraft.fdm_state;
+ double heading = globals->get_current_view()->getHeading_deg()
+ * SGD_DEGREES_TO_RADIANS;
+ double heading_offset = globals->get_current_view()->getHeadingOffset_deg()
+ * SGD_DEGREES_TO_RADIANS;
SG_LOG( SG_EVENT, SG_DEBUG, "Updating adjusted fog parameters." );
SG_LOG( SG_EVENT, SG_ALERT, "Sun rotation bad = " << sun_rotation );
exit(-1);
}
- if ( f->get_Psi() < -2.0 * SGD_2PI || f->get_Psi() > 2.0 * SGD_2PI ) {
- SG_LOG( SG_EVENT, SG_ALERT, "Psi rotation bad = " << f->get_Psi() );
+
+ if ( heading < -2.0 * SGD_2PI || heading > 2.0 * SGD_2PI ) {
+ SG_LOG( SG_EVENT, SG_ALERT, "Heading rotation bad = " << heading );
exit(-1);
}
- if ( globals->get_current_view()->getHeadingOffset_deg() * SGD_DEGREES_TO_RADIANS < -2.0 * SGD_2PI ||
- globals->get_current_view()->getHeadingOffset_deg() * SGD_DEGREES_TO_RADIANS > 2.0 * SGD_2PI ) {
- SG_LOG( SG_EVENT, SG_ALERT, "current view()->view offset bad = "
- << globals->get_current_view()->getHeadingOffset_deg() * SGD_DEGREES_TO_RADIANS );
+
+ if ( heading_offset < -2.0 * SGD_2PI || heading_offset > 2.0 * SGD_2PI ) {
+ SG_LOG( SG_EVENT, SG_ALERT, "Heading offset bad = " << heading_offset );
exit(-1);
}
+ double rotation;
+
// first determine the difference between our view angle and local
// direction to the sun
- rotation = -(sun_rotation + SGD_PI)
- - (f->get_Psi() - globals->get_current_view()->getHeadingOffset_deg() * SGD_DEGREES_TO_RADIANS);
+ rotation = -(sun_rotation + SGD_PI) - heading + heading_offset;
while ( rotation < 0 ) {
rotation += SGD_2PI;
}
while ( rotation > SGD_2PI ) {
rotation -= SGD_2PI;
}
+
+#ifdef USE_OLD_SUNSET_CODE
+
+ double sun_angle_deg, param1[3], param2[3];
+
rotation *= SGD_RADIANS_TO_DEGREES;
// fgPrintf( SG_EVENT, SG_INFO,
// " View to sun difference in degrees = %.2f\n", rotation);
if ( adj_fog_color[2] > 1.0 ) { adj_fog_color[2] = 1.0; }
adj_fog_color[3] = fog_color[3];
+
+#else
+
+ // revert to unmodified values before usign them.
+ //
+ float *sun_color = thesky->get_sun_color();
+
+ gamma_restore_rgb( fog_color );
+ gamma_restore_rgb( cloud_color );
+
+ // Calculate the fog color in the direction of the sun for
+ // sunrise/sunset effects.
+ //
+ float s_red = (fog_color[0] + 2 * pow(sun_color[0], 2)) / 3;
+ float s_green = (fog_color[1] + 2 * pow(sun_color[1], 2)) / 3;
+ float s_blue = (fog_color[2] + 2 * sun_color[2]) / 3;
+
+ // interpolate beween the sunrise/sunset color and the color
+ // at the opposite direction of this effect.
+ //
+ float sif = 0.5 - cos(sun_angle*2)/2;
+ float rf1 = fabs((rotation - SGD_PI) / SGD_PI); // 0.0 .. 1.0
+ float rf2 = 0.87 * pow(rf1 * rf1, 1/sif);
+ float rf3 = 1.0 - rf2;
+
+ adj_fog_color[0] = rf3 * fog_color[0] + rf2 * s_red;
+ adj_fog_color[1] = rf3 * fog_color[1] + rf2 * s_green;
+ adj_fog_color[2] = rf3 * fog_color[2] + rf2 * s_blue;
+ gamma_correct_rgb( adj_fog_color );
+
+ // make sure the colors have their original value before they are being
+ // used by the rest of the program.
+ //
+ gamma_correct_rgb( fog_color );
+ gamma_correct_rgb( cloud_color );
+#endif
}
}
-
-
projects / flightgear.git / blobdiff