I'm new to LWJGL and I've got a problem.
Other than emissive colour, I can't get materials to render with colour.
As a last attempt I've tried porting one of the Red book examples and it doesn't render the material colours correctly.
I've attached the code below any ideas?
import org.lwjgl.opengl.Window;
import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.glu.GLU;
import org.lwjgl.opengl.glu.Sphere;
import org.lwjgl.input.Keyboard;
import org.lwjgl.Display;
import org.lwjgl.BufferUtils;
import java.nio.FloatBuffer;
/**
* Simple Drawing Test
* http://www.sgi.com/products/software/opengl/examples/redbook/images/material.jpg
*/
public class SimpleDrawingTest
{
private boolean done = false;
private FloatBuffer working = BufferUtils.createFloatBuffer(4);
public static void main(String args[]) throws Exception
{
new SimpleDrawingTest().run();
}
public void run() throws Exception
{
init();
while (!done)
{
input();
render();
Window.update();
Thread.sleep(1000 / 25);
}
cleanup();
}
private void input()
{
Keyboard.poll();
if (Keyboard.isKeyDown(Keyboard.KEY_ESCAPE))
{
done = true;
}
}
private void render()
{
GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
GL11.glLoadIdentity();
GL11.glTranslatef(0f, 0f, -10f);
float no_mat[] = new float[]{0.0f, 0.0f, 0.0f, 1.0f};
float mat_ambient[] = new float[]{0.7f, 0.7f, 0.7f, 1.0f};
float mat_ambient_color[] = new float[]{0.8f, 0.8f, 0.2f, 1.0f};
float mat_diffuse[] = new float[]{0.1f, 0.5f, 0.8f, 1.0f};
float mat_specular[] = new float[]{1.0f, 1.0f, 1.0f, 1.0f};
float no_shininess[] = new float[]{0.0f};
float low_shininess[] = new float[]{5.0f};
float high_shininess[] = new float[]{100.0f};
float mat_emission[] = new float[]{0.3f, 0.2f, 0.2f, 0.0f};
Sphere sphere = new Sphere();
GL11.glEnable(GL11.GL_COLOR_MATERIAL);
GL11.glPushMatrix();
GL11.glTranslatef(-3.75f, 3.0f, 0.0f);
set(no_mat, mat_diffuse, no_mat, no_shininess, no_mat);
sphere.draw(1.0f, 16, 16);
GL11.glPopMatrix();
GL11.glPushMatrix();
GL11.glTranslatef(-1.25f, 3.0f, 0.0f);
set(no_mat, mat_diffuse, mat_specular, low_shininess, no_mat);
sphere.draw(1.0f, 16, 16);
GL11.glPopMatrix();
GL11.glPushMatrix();
GL11.glTranslatef(1.25f, 3.0f, 0.0f);
set(no_mat, mat_diffuse, mat_specular, high_shininess, no_mat);
sphere.draw(1.0f, 16, 16);
GL11.glPopMatrix();
GL11.glPushMatrix();
GL11.glTranslatef(3.75f, 3.0f, 0.0f);
set(no_mat, mat_diffuse, no_mat, no_shininess, mat_emission);
sphere.draw(1.0f, 16, 16);
GL11.glPopMatrix();
GL11.glPushMatrix();
GL11.glTranslatef(-3.75f, 0.0f, 0.0f);
set(mat_ambient, mat_diffuse, no_mat, no_shininess, no_mat);
sphere.draw(1.0f, 16, 16);
GL11.glPopMatrix();
GL11.glPushMatrix();
GL11.glTranslatef(-1.25f, 0.0f, 0.0f);
set(mat_ambient, mat_diffuse, mat_specular, low_shininess, no_mat);
sphere.draw(1.0f, 16, 16);
GL11.glPopMatrix();
GL11.glPushMatrix();
GL11.glTranslatef(1.25f, 0.0f, 0.0f);
set(mat_ambient, mat_diffuse, mat_specular, high_shininess, no_mat);
sphere.draw(1.0f, 16, 16);
GL11.glPopMatrix();
GL11.glPushMatrix();
GL11.glTranslatef(3.75f, 0.0f, 0.0f);
set(mat_ambient, mat_diffuse, no_mat, no_shininess, mat_emission);
sphere.draw(1.0f, 16, 16);
GL11.glPopMatrix();
GL11.glPushMatrix();
GL11.glTranslatef(-3.75f, -3.0f, 0.0f);
set(mat_ambient_color, mat_diffuse, no_mat, no_shininess, no_mat);
sphere.draw(1.0f, 16, 16);
GL11.glPopMatrix();
GL11.glPushMatrix();
GL11.glTranslatef(-1.25f, -3.0f, 0.0f);
set(mat_ambient_color, mat_diffuse, mat_specular, low_shininess, no_mat);
sphere.draw(1.0f, 16, 16);
GL11.glPopMatrix();
GL11.glPushMatrix();
GL11.glTranslatef(1.25f, -3.0f, 0.0f);
set(mat_ambient_color, mat_diffuse, mat_specular, high_shininess, no_mat);
sphere.draw(1.0f, 16, 16);
GL11.glPopMatrix();
GL11.glPushMatrix();
GL11.glTranslatef(3.75f, -3.0f, 0.0f);
set(mat_ambient_color, mat_diffuse, no_mat, no_shininess, mat_emission);
sphere.draw(1.0f, 16, 16);
GL11.glPopMatrix();
}
private void createWindow() throws Exception
{
Window.create("Simple Drawing Test", 0, 0, 300, 200, 32, 0, 8, 0);
}
private void init() throws Exception
{
createWindow();
Keyboard.create();
initGL();
}
private void initGL()
{
float ambient[] = new float[]{0.0f, 0.0f, 0.0f, 1.0f};
float diffuse[] = new float[]{1.0f, 1.0f, 1.0f, 1.0f};
float specular[] = new float[]{1.0f, 1.0f, 1.0f, 1.0f};
float position[] = new float[]{0.0f, 3.0f, 2.0f, 0.0f};
float lmodel_ambient[] = new float[]{0.4f, 0.4f, 0.4f, 1.0f};
float local_view[] = new float[]{0.0f};
GL11.glClearColor(0.0f, 0.1f, 0.1f, 0.0f);
GL11.glEnable(GL11.GL_DEPTH_TEST);
GL11.glShadeModel(GL11.GL_SMOOTH);
GL11.glMatrixMode(GL11.GL_PROJECTION);
GL11.glLoadIdentity();
GLU.gluPerspective(45.0f, (float) Display.getWidth() / (float) Display.getHeight(), 0.1f, 100.0f);
GL11.glMatrixMode(GL11.GL_MODELVIEW);
GL11.glLoadIdentity();
loadWorking(ambient);
GL11.glLight(GL11.GL_LIGHT0, GL11.GL_AMBIENT, working);
loadWorking(diffuse);
GL11.glLight(GL11.GL_LIGHT0, GL11.GL_DIFFUSE, working);
loadWorking(specular);
GL11.glLight(GL11.GL_LIGHT0, GL11.GL_SPECULAR, working);
loadWorking(position);
GL11.glLight(GL11.GL_LIGHT0, GL11.GL_POSITION, working);
loadWorking(lmodel_ambient);
GL11.glLightModel(GL11.GL_LIGHT_MODEL_AMBIENT, working);
GL11.glLightModelf(GL11.GL_LIGHT_MODEL_LOCAL_VIEWER, local_view[0]);
GL11.glEnable(GL11.GL_LIGHTING);
GL11.glEnable(GL11.GL_LIGHT0);
}
private void cleanup()
{
Keyboard.destroy();
Window.destroy();
}
private void set(float ambient[], float diffuse[], float specular[], float shininess[], float emission[])
{
loadWorking(ambient);
GL11.glMaterial(GL11.GL_FRONT, GL11.GL_AMBIENT, working);
loadWorking(diffuse);
GL11.glMaterial(GL11.GL_FRONT, GL11.GL_DIFFUSE, working);
loadWorking(specular);
GL11.glMaterial(GL11.GL_FRONT, GL11.GL_SPECULAR, working);
GL11.glMaterialf(GL11.GL_FRONT, GL11.GL_SHININESS, shininess[0]);
loadWorking(emission);
GL11.glMaterial(GL11.GL_FRONT, GL11.GL_EMISSION, working);
}
private void loadWorking(float[] data)
{
working.rewind();
working.put(data);
working.flip();
}
}
Thanks
I found the answer.
GL11.glEnable(GL11.GL_COLOR_MATERIAL);
should not be.
Well, it should[/b] be... but only if you want to modify the lighting color on the fly using glColor commands (which you weren't, so you're dead right).
Cas :)