Problems with OpenGL lighting - c++

Question

I'm having trouble being able to see objects I've created when I have enabled lighting in OpenGL. I have an object that is imported from 3D Max that the lighting works correctly on but the rest of my scene does not. I know that I need to specify normals but this hasn't seemed to have helped. Although if I create a simple polygon in my display() function that works correctly but other polygons that have been created in methods of a class and called in the display() function are not showing up
Here is my lighting code
glewInit();
glClearColor(0.0,0.0,0.0,0.0);
glClear(GL_COLOR_BUFFER_BIT)
glShadeModel(GL_SMOOTH);
//light position and colour
GLfloat light_position[] = { 0.0, 0.0, 20.0,0.0 };
GLfloat white_light[] = {0.8,0.8,0.8,0.0};
GLfloat diff_light[] = {1.0,1.0,1.0,0.0};
GLfloat spec_light[] = {1.0,1.0,1.0,0.0};
glLightfv(GL_LIGHT0, GL_AMBIENT, white_light);
glLightfv(GL_LIGHT0, GL_DIFFUSE, diff_light);
glLightfv(GL_LIGHT0, GL_SPECULAR, spec_light);
glLightfv(GL_LIGHT0, GL_POSITION, light_position);
//ambient light
GLfloat ambient[] = {0.3,0.3,0.3};
glMaterialfv(GL_FRONT, GL_AMBIENT, ambient);
//diffuse material component
GLfloat diff[] = {0.6,0.6,0.6};
glMaterialfv(GL_FRONT, GL_DIFFUSE, diff);
//specular material component
GLfloat WhiteSpec[] = {1,1,1};
glMaterialfv(GL_FRONT, GL_SPECULAR, WhiteSpec);
GLfloat shininess = 50;
glMaterialf(GL_FRONT, GL_SHININESS, shininess);
//ENABLE LIGHTING AND DEPTH TEST
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_DEPTH_TEST);
This is my class method that is creating my sea
glColor3f(0,0,1);
glPushMatrix();
//enable texturing
glEnable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glBindTexture(GL_TEXTURE_2D, seaTex);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
for(int i = 0, k = 0; i < (getWidth()/10); i++){
for(int j = 0; j < (getLength()/10); j++){
if(i >= Sea::waveLoc1 && i <= Sea::waveLoc1+Sea::sinArrayLength){
int nextK = k+1;
if(nextK == Sea::sinArrayLength){
nextK = 0;
}
if(i == Sea::waveLoc1+Sea::sinArrayLength){
//front of wave
glBegin(GL_POLYGON);
glNormal3f(0.0f, 1.0f, 0.0f);
glTexCoord2f(0.0, 1.0);glVertex3f(Sea::seaGrid[i][j].x, Sea::sinVals[nextK], Sea::seaGrid[i][j].z);
glTexCoord2f(0.0, 0.0);glVertex3f(Sea::seaGrid[i][j+1].x, Sea::sinVals[nextK], Sea::seaGrid[i][j+1].z);
glTexCoord2f(1.0, 0.0);glVertex3f(Sea::seaGrid[i+1][j+1].x, Sea::seaGrid[i+1][j+1].y , Sea::seaGrid[i+1][j+1].z);
glTexCoord2f(1.0, 1.0);glVertex3f(Sea::seaGrid[i+1][j].x, Sea::seaGrid[i+1][j].y, Sea::seaGrid[i+1][j].z);
glEnd();
}else{
//rest of wave
glBegin(GL_POLYGON);
glNormal3f(0.0f, 1.0f, 0.0f);
glTexCoord2f(0.0, 1.0);glVertex3f(Sea::seaGrid[i][j].x, Sea::sinVals[k], Sea::seaGrid[i][j].z);
glTexCoord2f(0.0, 0.0);glVertex3f(Sea::seaGrid[i][j+1].x, Sea::sinVals[k], Sea::seaGrid[i][j+1].z);
glTexCoord2f(1.0, 0.0);glVertex3f(Sea::seaGrid[i+1][j+1].x, Sea::sinVals[nextK], Sea::seaGrid[i+1][j+1].z);
glTexCoord2f(1.0, 1.0);glVertex3f(Sea::seaGrid[i+1][j].x, Sea::sinVals[nextK], Sea::seaGrid[i+1][j].z);
glEnd();
}
}else{
//draw flat sea
glBegin(GL_POLYGON);
glNormal3f(0.0f, 1.0f, 0.0f);
glTexCoord2f(0.0, 1.0);glVertex3f(Sea::seaGrid[i+1][j].x, Sea::seaGrid[i+1][j].y, Sea::seaGrid[i+1][j].z);
glTexCoord2f(0.0, 0.0);glVertex3f(Sea::seaGrid[i+1][j+1].x, Sea::seaGrid[i+1][j+1].y, Sea::seaGrid[i+1][j+1].z);
glTexCoord2f(1.0, 0.0);glVertex3f(Sea::seaGrid[i][j+1].x, Sea::seaGrid[i][j+1].y, Sea::seaGrid[i][j+1].z);
glTexCoord2f(1.0, 1.0);glVertex3f(Sea::seaGrid[i][j].x, Sea::seaGrid[i][j].y, Sea::seaGrid[i][j].z);
glEnd();
}
}
//increment k if i is in the area of the wave
if(k < Sea::sinArrayLength-1 && (i >= Sea::waveLoc1 && i <= Sea::waveLoc1+Sea::sinArrayLength)){
k++;
}else if(k == Sea::sinArrayLength){
k = 0;
}
}
if(Sea::waveLoc1 < 100 && Sea::waveInc == Sea::waveSpeedLimiter){
Sea::waveLoc1 +=1;
}else if(Sea::waveLoc1 >= 100){
Sea::waveLoc1 = 0;
}
//limits speed of wave
if(Sea::waveInc < Sea::waveSpeedLimiter){
Sea::waveInc++;
}else{
Sea::waveInc = 0;
}
//disable texturing
glDisable(GL_BLEND);
glDisable(GL_TEXTURE_2D);
glPopMatrix();
This is then called in my display() function as below
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0f,(GLfloat)screenWidth/(GLfloat)screenHeight,0.1f,1000.0f);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
camera.updateCameraPosition(mouse_x,mouse_y,screenWidth,screenHeight);
sea.buildSeaPlane();
scene.buildEdges();
glPushMatrix();
glColor3f(0,1,0);
glTranslatef(0, 20, 200);
model.speedDisplayFaceNormals();
glPopMatrix();
glPushMatrix();
plane.updatePlanePosition();
glBegin(GL_POLYGON);
glNormal3f(0.0f, 1.0f, 0.0f);
glVertex3f(0, 25, 10);
glVertex3f(2, 25, 10);
glVertex3f(2, 25, 20);
glVertex3f(0, 25, 20);
glEnd();
glPopMatrix();
glFlush();
Any idea why I can't see any of this?
UPDATE:
I can see my sea if I disable texturing. How can I fix it so I can use textures and lighting?
UPDATE 2:
Have changed texturing to GL_MODULATE but I also had to remove the blending to make it work. Do I need blending enabled?

Answer 1

glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
says to replace the lighting computation with the result of texturing. If you want lighting to affect texturing, us GL_MODULATE instead of GL_REPLACE.
Edit to add:
You only need blending if you want your geometry to be translucent (that's what blending is typically for). In your case, there are a number of issues in the code:
your light colors are fully transparent (all have 0. as the 4th component). So your light is making everything invisible. change it to 1.
your materials don't have a 4th component. That's even worse, as glMaterialfv expects 4 floats. That could even crash your app or reformat your disk. Add a forth component, preferably to 1. to make it fully opaque.

Answer 2

Try adding an ambient light for the whole scene. Something like:
GLfloat lightColor[] = {1.0f, 1.0f, 1.0f, 1.0f};
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lightColor);

Answer 3

In your glMaterialfv calls, the color parameter should have 4 values, not 3. Normally the 4th value is an alpha of 1.0. I'm not sure if it's OK to pass 0.0 as the 4th value for glLightfv either.