static void
DrawScene(void)
{
int i;
glEnable(GL_LIGHTING);
for (i = 0; i < NUM_CYLINDERS; i++) {
DrawCylinder(&Cylinders[i]);
}
glDisable(GL_LIGHTING);
if (1)
DrawLightSource();
/* ground plane */
if (1) {
GLfloat k = 10.0, g = GroundY;
CheckError(__LINE__);
glPushMatrix();
glColor3fv(GroundColor);
glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, GroundColor);
glNormal3f(0, 1, 0);
glBegin(GL_POLYGON);
glVertex3f(-k, g, -k);
glVertex3f( k, g, -k);
glVertex3f( k, g, k);
glVertex3f(-k, g, k);
glEnd();
glPopMatrix();
}
CheckError(__LINE__);
}
void RedrawFunc( void )
{
// all time in milliseconds
int elapsedTime = glutGet( GLUT_ELAPSED_TIME );
static int prevElapsedTime = 0;
static float timeAccum = 0.0;
int deltaTime = elapsedTime - prevElapsedTime;
vec3_t lightPosition = { 0.0f, 0.0f, 60.0f };
prevElapsedTime = elapsedTime;
glClearColor( 0.0f, 0.0f, 0.0f, 1.0f );
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glDepthFunc( GL_LEQUAL );
glEnable( GL_DEPTH_TEST );
if( drawLighting )
{
SetLight( lightPosition );
}
if( drawBaseTexture )
{
glEnable( GL_TEXTURE_2D );
glBindTexture( GL_TEXTURE_2D, BASE_TEXTURE );
// glBindTexture( GL_TEXTURE_2D, NORMAL_TEXTURE );
}
else
{
glDisable( GL_TEXTURE_2D );
}
if( drawWireFrame )
{
glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
glCallList( WIRE_LIST );
}
else
{
glCallList( QUAD_LIST );
}
glDisable( GL_TEXTURE_2D );
glDisable( GL_LIGHTING );
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
if( drawNormals )
{
glColor3f( 0.0f, 1.0f, 0.0f );
glCallList( NORMAL_LIST );
glColor3f( 1.0f, 1.0f, 1.0f );
}
DrawLightSource( lightPosition, 1.0f, 1.0f, 1.0f );
DrawStatus();
glutSwapBuffers();
glFinish();
}