// display callback
// XXX: NEEDS TO BE IMPLEMENTED
void World::display() {
glClearColor(0.2, 0.2, 0.2, 0.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
// position the camera at (0,0,cameraZ) looking down the
// negative z-axis at (0,0,0)
gluLookAt(0.0, 0.0, cameraZ, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
GLfloat lightPosition[]= { 5.0, 5.0, 5.0, 0.0 };
glLightfv(GL_LIGHT0, GL_POSITION, lightPosition);
glEnable(GL_LIGHT0);
glEnable(GL_DEPTH_TEST);
// shift object
glTranslatef(shift.x, shift.y, shift.z);
// rotate Object
glRotatef(rotation.x, 1.0f, 0.0f, 0.0f);
glRotatef(rotation.y, 0.0f, 1.0f, 0.0f);
// show coordinate system
if (showCoordinates) {
glDisable(GL_LIGHTING);
glDisable(GL_TEXTURE_2D);
glBegin(GL_LINES);
glColor3ub(255, 0, 0);
glVertex3f(0.0, 0.0, 0.0);
glVertex3f(1.0, 0.0, 0.0);
glColor3ub(0, 255, 0);
glVertex3f(0.0, 0.0, 0.0);
glVertex3f(0.0, 1.0, 0.0);
glColor3ub(0, 0, 255);
glVertex3f(0.0, 0.0, 0.0);
glVertex3f(0.0, 0.0, 1.0);
glEnd();
}
// show center of spherical mapping
if (showOrigin) {
glDisable(GL_LIGHTING);
glDisable(GL_TEXTURE_2D);
glColor3f(1.0, 1.0, 0.0);
glPushMatrix();
glutSolidSphere(0.05f, 20, 20);
glPopMatrix();
}
// draw cursor
// XXX
// INSERT YOUR CODE HERE
glBegin(GL_LINES);
glColor3ub(255, 0, 0);
glVertex3f(0.0, 0.0, 0.0);
glVertex3f(cursor.x, cursor.y, cursor.z);
glEnd();
// END XXX
glScalef(scale, scale, scale);
if (doLighting)
glEnable(GL_LIGHTING);
else
glDisable(GL_LIGHTING);
// draw the geometry
// if showTexture is true, enable texturing in opengl
// XXX
// INSERT YOUR CODE HERE
if (showTexture) {
glEnable(GL_TEXTURE_2D);
}
// END XXX
glColor3f(1, 1, 1);
if (environmentMapping) {
if (!shaderIsLoaded) {
myShader.load("shaders/emBlinnPhong");
shaderIsLoaded = 1;
}
myShader.bindShader();
}
if (drawRect) {
// draw a textured quad
// XXX
// INSERT YOUR CODE HERE
fullScreenQuad();
// END XXX
}
// else draw model
// XXX
// INSERT YOUR CODE HERE
else {
if (defaultModelIndex != -1) {
model = Mesh::loadOff(models[defaultModelIndex]);
defaultModelIndex = -1;
}
model.Display();
}
if (environmentMapping) { // if we used em, unbind shader afterwards
myShader.unbindShader();
}
// glDisable(GL_TEXTURE_2D); ???
// END XXX
glutSwapBuffers();
}
