Thread: First Person Camera

I saw a code for a FPCamera on lloydgoodall.com. It had many, many errors, which I fixed.

It loads, but for some reason, the mouse and keyboard don't do any effect on the program.

My code:

import org.lwjgl.Sys;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.GL11;
import org.lwjgl.util.vector.Vector3f;
import org.lwjgl.input.Keyboard;
import org.lwjgl.input.Mouse;
import org.lwjgl.LWJGLException;
import org.lwjgl.opengl.DisplayMode;
import org.lwjgl.util.glu.GLU;
 
//First Person Camera Controller
public class FPCameraController
{
    //3d vector to store the camera's position in
    private Vector3f    position    = null;
    //the rotation around the Y axis of the camera
    private float       yaw         = 0.0f;
    //the rotation around the X axis of the camera
    private float       pitch       = 0.0f;
    //Constructor that takes the starting x, y, z location of the camera
    public FPCameraController(float x, float y, float z)
    {
        //instantiate position Vector3f to the x y z params.
        position = new Vector3f(x, y, z);
    }
    public FPCameraController() {
		// TODO Auto-generated constructor stub
	}
	//increment the camera's current yaw rotation
    public void yaw(float amount)
    {
        //increment the yaw by the amount param
        yaw += amount;
    }
 
    //increment the camera's current yaw rotation
    public void pitch(float amount)
    {
        //increment the pitch by the amount param
        pitch += amount;
    }
    //moves the camera forward relitive to its current rotation (yaw)
    public void walkForward(float distance)
    {
        position.x -= distance * (float)Math.sin(Math.toRadians(yaw));
        position.z += distance * (float)Math.cos(Math.toRadians(yaw));
    }
 
    //moves the camera backward relitive to its current rotation (yaw)
    public void walkBackwards(float distance)
    {
        position.x += distance * (float)Math.sin(Math.toRadians(yaw));
        position.z -= distance * (float)Math.cos(Math.toRadians(yaw));
    }
 
    //strafes the camera left relitive to its current rotation (yaw)
    public void strafeLeft(float distance)
    {
        position.x -= distance * (float)Math.sin(Math.toRadians(yaw-90));
        position.z += distance * (float)Math.cos(Math.toRadians(yaw-90));
    }
 
    //strafes the camera right relitive to its current rotation (yaw)
    public void strafeRight(float distance)
    {
        position.x -= distance * (float)Math.sin(Math.toRadians(yaw+90));
        position.z += distance * (float)Math.cos(Math.toRadians(yaw+90));
    }
 
    //translates and rotate the matrix so that it looks through the camera
    //this dose basic what gluLookAt() does
    public void lookThrough()
    {
        //roatate the pitch around the X axis
        GL11.glRotatef(pitch, 1.0f, 0.0f, 0.0f);
        //roatate the yaw around the Y axis
        GL11.glRotatef(yaw, 0.0f, 1.0f, 0.0f);
        //translate to the position vector's location
        GL11.glTranslatef(position.x, position.y, position.z);
    }
    private static boolean gameRunning=true;
    private static int targetWidth = 800;
    private static int targetHeight = 600;
 
    private float xrot=0.1f;
    private float yrot=0.1f;
    private float zrot=0.1f;
 
    /** The texture that’s been loaded */
 
    private static void initDisplay(boolean fullscreen){
 
        DisplayMode chosenMode = null;
 
        try {
                DisplayMode[] modes = Display.getAvailableDisplayModes();
 
                for (int i=0;i<modes.length;i++) {
                    if ((modes[i].getWidth() == targetWidth) && (modes[i].getHeight() == targetHeight)) {
                        chosenMode = modes[i];
                        break;
                    }
                }
            } catch (LWJGLException e) {
        Sys.alert("Error", "Unable to determine display modes.");
        System.exit(0);
    }
 
        // at this point if we have no mode there was no appropriate, let the user know
    // and give up
        if (chosenMode == null) {
            Sys.alert("Error", "Unable to find appropriate display mode.");
            System.exit(0);
        }
 
        try {
            Display.setDisplayMode(chosenMode);
            Display.setFullscreen(fullscreen);
            Display.setTitle("ZOMBIES!");
            Display.create();
            Keyboard.create();
            Mouse.create();
        }
        catch (LWJGLException e) {
            Sys.alert("Error","Unable to create display.");
            System.exit(0);
        }
 
}
 
    private static boolean initGL(){
        GL11.glMatrixMode(GL11.GL_PROJECTION);
        GL11.glLoadIdentity();
 
//        Calculate the aspect ratio of the window
        GLU.gluPerspective(45.0f,((float)targetWidth)/((float)targetHeight),0.1f,100.0f);
        GL11.glMatrixMode(GL11.GL_MODELVIEW);
        GL11.glLoadIdentity();
 
        GL11.glEnable(GL11.GL_TEXTURE_2D);                                    // Enable Texture Mapping ( NEW )
        GL11.glShadeModel(GL11.GL_SMOOTH);
        GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
        GL11.glClearDepth(1.0f);
        GL11.glEnable(GL11.GL_DEPTH_TEST);
        GL11.glDepthFunc(GL11.GL_LEQUAL);
        GL11.glHint(GL11.GL_PERSPECTIVE_CORRECTION_HINT, GL11.GL_NICEST);
        return true;
    }
 
    private void run(){
        while(gameRunning){
            update();
            render();
            Display.update();
 
            // finally check if the user has requested that the display be
            // shutdown
            if (Display.isCloseRequested()) {
                    gameRunning = false;
                    Display.destroy();
                    System.exit(0);
                }
            }
    }
 
    private void update(){
        xrot+=0.1f;
        yrot+=0.1f;
        zrot+=0.1f;
    }
 
    private void render(){
        GL11.glClear(GL11.GL_COLOR_BUFFER_BIT|GL11.GL_DEPTH_BUFFER_BIT);
        GL11.glLoadIdentity();
 
        GL11.glTranslatef(0.0f,0.0f,-5.0f);                              // Move Into The Screen 5 Units
 
        GL11.glBegin(GL11.GL_QUADS);
 
                // Front Face
                GL11.glTexCoord2f(0.0f, 0.0f);
                GL11.glVertex3f(-1.0f, -1.0f,  1.0f);   // Bottom Left Of The Texture and Quad
                GL11.glTexCoord2f(1.0f, 0.0f);
                GL11.glVertex3f( 1.0f, -1.0f,  1.0f);   // Bottom Right Of The Texture and Quad
                GL11.glTexCoord2f(1.0f, 1.0f);
                GL11.glVertex3f( 1.0f,  1.0f,  1.0f);   // Top Right Of The Texture and Quad
                GL11.glTexCoord2f(0.0f, 1.0f);
                GL11.glVertex3f(-1.0f,  1.0f,  1.0f);   // Top Left Of The Texture and Quad
 
                // Back Face
                GL11.glTexCoord2f(1.0f, 0.0f);
                GL11.glVertex3f(-1.0f, -1.0f, -1.0f);   // Bottom Right Of The Texture and Quad
                GL11.glTexCoord2f(1.0f, 1.0f);
                GL11.glVertex3f(-1.0f,  1.0f, -1.0f);   // Top Right Of The Texture and Quad
                GL11.glTexCoord2f(0.0f, 1.0f);
                GL11.glVertex3f( 1.0f,  1.0f, -1.0f);   // Top Left Of The Texture and Quad
                GL11.glTexCoord2f(0.0f, 0.0f);
                GL11.glVertex3f( 1.0f, -1.0f, -1.0f);   // Bottom Left Of The Texture and Quad
 
                // Top Face
                GL11.glTexCoord2f(0.0f, 1.0f);
                GL11.glVertex3f(-1.0f,  1.0f, -1.0f);   // Top Left Of The Texture and Quad
                GL11.glTexCoord2f(0.0f, 0.0f);
                GL11.glVertex3f(-1.0f,  1.0f,  1.0f);   // Bottom Left Of The Texture and Quad
                GL11.glTexCoord2f(1.0f, 0.0f);
                GL11.glVertex3f( 1.0f,  1.0f,  1.0f);   // Bottom Right Of The Texture and Quad
                GL11.glTexCoord2f(1.0f, 1.0f);
                GL11.glVertex3f( 1.0f,  1.0f, -1.0f);   // Top Right Of The Texture and Quad
 
                // Bottom Face
                GL11.glTexCoord2f(1.0f, 1.0f);
                GL11.glVertex3f(-1.0f, -1.0f, -1.0f);   // Top Right Of The Texture and Quad
                GL11.glTexCoord2f(0.0f, 1.0f);
                GL11.glVertex3f( 1.0f, -1.0f, -1.0f);   // Top Left Of The Texture and Quad
                GL11.glTexCoord2f(0.0f, 0.0f);
                GL11.glVertex3f( 1.0f, -1.0f,  1.0f);   // Bottom Left Of The Texture and Quad
                GL11.glTexCoord2f(1.0f, 0.0f);
                GL11.glVertex3f(-1.0f, -1.0f,  1.0f);   // Bottom Right Of The Texture and Quad
 
                // Right face
                GL11.glTexCoord2f(1.0f, 0.0f);
                GL11.glVertex3f( 1.0f, -1.0f, -1.0f);   // Bottom Right Of The Texture and Quad
                GL11.glTexCoord2f(1.0f, 1.0f);
                GL11.glVertex3f( 1.0f,  1.0f, -1.0f);   // Top Right Of The Texture and Quad
                GL11.glTexCoord2f(0.0f, 1.0f);
                GL11.glVertex3f( 1.0f,  1.0f,  1.0f);   // Top Left Of The Texture and Quad
                GL11.glTexCoord2f(0.0f, 0.0f);
                GL11.glVertex3f( 1.0f, -1.0f,  1.0f);   // Bottom Left Of The Texture and Quad
 
                // Left Face
                GL11.glTexCoord2f(0.0f, 0.0f);
                GL11.glVertex3f(-1.0f, -1.0f, -1.0f);   // Bottom Left Of The Texture and Quad
                GL11.glTexCoord2f(1.0f, 0.0f);
                GL11.glVertex3f(-1.0f, -1.0f,  1.0f);   // Bottom Right Of The Texture and Quad
                GL11.glTexCoord2f(1.0f, 1.0f);
                GL11.glVertex3f(-1.0f,  1.0f,  1.0f);   // Top Right Of The Texture and Quad
                GL11.glTexCoord2f(0.0f, 1.0f);
                GL11.glVertex3f(-1.0f,  1.0f, -1.0f);   // Top Left Of The Texture and Quad
        GL11.glEnd();
    }
 
    public static void main(String[] args)
{       
    	FPCameraController app = new FPCameraController();
    	initDisplay(false);
		initGL();
		//app.init();
		app.run();
    	FPCameraController camera = new FPCameraController(0, 0, 0);
 
 
 
    float dx        = 0.0f;
    float dy        = 0.0f;
    float dt        = 0.0f; //length of frame
    float lastTime  = 0.0f; // when the last frame was
    float time      = 0.0f;
 
    float mouseSensitivity = 0.05f;
    float movementSpeed = 10.0f; //move 10 units per second
 
    //hide the mouse
    Mouse.setGrabbed(true);
 
    // keep looping till the display window is closed the ESC key is down
    //while (!Display.isCloseRequested() &&
    //       !Keyboard.isKeyDown(Keyboard.KEY_ESCAPE))
    //{
        time = Sys.getTime();
        dt = (time - lastTime)/1000.0f;
        lastTime = time;
 
 
        //distance in mouse movement from the last getDX() call.
        dx = Mouse.getDX();
        //distance in mouse movement from the last getDY() call.
        dy = Mouse.getDY();
 
        //controll camera yaw from x movement fromt the mouse
        camera.yaw(dx * mouseSensitivity);
        //controll camera pitch from y movement fromt the mouse
        camera.pitch(dy * mouseSensitivity);
 
 
        //when passing in the distrance to move
        //we times the movementSpeed with dt this is a time scale
        //so if its a slow frame u move more then a fast frame
        //so on a slow computer you move just as fast as on a fast computer
        if (Keyboard.isKeyDown(Keyboard.KEY_W))//move forward
        {
            camera.walkForward(movementSpeed*dt);
        }
        if (Keyboard.isKeyDown(Keyboard.KEY_S))//move backwards
        {
            camera.walkBackwards(movementSpeed*dt);
        }
        if (Keyboard.isKeyDown(Keyboard.KEY_A))//strafe left
        {
            camera.strafeLeft(movementSpeed*dt);
        }
        if (Keyboard.isKeyDown(Keyboard.KEY_D))//strafe right
        {
            camera.strafeRight(movementSpeed*dt);
        }
 
        //set the modelview matrix back to the identity
        GL11.glLoadIdentity();
        //look through the camera before you draw anything
        camera.lookThrough();
        //you would draw your scene here.
 
        //draw the buffer to the screen
        Display.update();
    }
 
	}
//}