void ShowViewport()
{
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH );
if (glutGet(GLUT_SCREEN_WIDTH) > 0 && glutGet(GLUT_SCREEN_HEIGHT) > 0){
glutInitWindowPosition( (glutGet(GLUT_SCREEN_WIDTH) - camera.imgWidth)/2, (glutGet(GLUT_SCREEN_HEIGHT) - camera.imgHeight)/2 );
}
else glutInitWindowPosition( 50, 50 );
glutInitWindowSize(camera.imgWidth, camera.imgHeight);
glutCreateWindow("Ray Tracer - CS 6620");
glutDisplayFunc(GlutDisplay);
glutReshapeFunc(GlutReshape);
glutIdleFunc(GlutIdle);
glutKeyboardFunc(GlutKeyboard);
glutMouseFunc(GlutMouse);
glutMotionFunc(GlutMotion);
Color bg = background.GetColor();
glClearColor(bg.r,bg.g,bg.b,0);
glPointSize(3.0);
glEnable( GL_CULL_FACE );
float zero[] = {0,0,0,0};
glLightModelfv( GL_LIGHT_MODEL_AMBIENT, zero );
glEnable(GL_NORMALIZE);
glLineWidth(2);
if ( camera.dof > 0 ) {
dofBuffer = new Color24[ camera.imgWidth * camera.imgHeight ];
dofImage = new Color[ camera.imgWidth * camera.imgHeight ];
memset( dofImage, 0, camera.imgWidth * camera.imgHeight * sizeof(Color) );
}
glutMainLoop();
}
void DrawScene()
{
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT );
const TextureMap *bgMap = background.GetTexture();
if ( bgMap ) {
glDepthMask(GL_FALSE);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
Color c = background.GetColor();
glColor3f(c.r,c.g,c.b);
if ( bgMap->SetViewportTexture() ) {
glEnable( GL_TEXTURE_2D );
glMatrixMode( GL_TEXTURE );
Matrix3 tm = bgMap->GetInverseTransform();
Point3 p = tm * bgMap->GetPosition();
float m[16] = { tm[0],tm[1],tm[2],0, tm[3],tm[4],tm[5],0, tm[6],tm[7],tm[8],0, -p.x,-p.y,-p.z,1 };
glLoadMatrixf( m );
glMatrixMode( GL_MODELVIEW );
} else {
glDisable( GL_TEXTURE_2D );
}
glBegin(GL_QUADS);
glTexCoord2f(0,1);
glVertex2f(-1,-1);
glTexCoord2f(1,1);
glVertex2f( 1,-1);
glTexCoord2f(1,0);
glVertex2f( 1, 1);
glTexCoord2f(0,0);
glVertex2f(-1, 1);
glEnd();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glDepthMask(GL_TRUE);
glDisable( GL_TEXTURE_2D );
}
glEnable( GL_LIGHTING );
glEnable( GL_DEPTH_TEST );
glPushMatrix();
Point3 p = camera.pos;
Point3 t = camera.pos + camera.dir*camera.focaldist;
Point3 u = camera.up;
if ( camera.dof > 0 ) {
Point3 v = camera.dir ^ camera.up;
float r = sqrtf(float(rand())/RAND_MAX)*camera.dof;
float a = M_PI * 2.0f * float(rand())/RAND_MAX;
p += r*cosf(a)*v + r*sinf(a)*u;
}
gluLookAt( p.x, p.y, p.z, t.x, t.y, t.z, u.x, u.y, u.z );
glRotatef( viewAngle1, 1, 0, 0 );
glRotatef( viewAngle2, 0, 0, 1 );
if ( lights.size() > 0 ) {
for ( unsigned int i=0; i<lights.size(); i++ ) {
lights[i]->SetViewportLight(i);
}
} else {
float white[] = {1,1,1,1};
float black[] = {0,0,0,0};
Point4 p(camera.pos, 1);
glEnable ( GL_LIGHT0 );
glLightfv( GL_LIGHT0, GL_AMBIENT, black );
glLightfv( GL_LIGHT0, GL_DIFFUSE, white );
glLightfv( GL_LIGHT0, GL_SPECULAR, white );
glLightfv( GL_LIGHT0, GL_POSITION, &p.x );
}
DrawNode(&rootNode);
glPopMatrix();
glDisable( GL_DEPTH_TEST );
glDisable( GL_LIGHTING );
glDisable( GL_TEXTURE_2D );
}
