Gaming Homebrew Project OpenGl glTranslatef() only moves object on the z axis.

A_stream

Member
OP
Newcomer
Joined
Apr 20, 2023
Messages
13
Trophies
0
Age
29
XP
264
Country
Bulgaria
Good Day/Night. I'm not sure if I can ask in here, but I'm having a little problem with my prototype game.
So I'm trying to learn OpenGl using GLUT with CodeBlocks, and everything is going well, like, it renders a cube that I can move, but It only moves on the z axis. And I don't know what to do, because I checked everywhere to see if I did something wrong, but there's nothing (I even tried chatGPT to generate me code but it's the same). So I came here to ask if anyone here has any clue on how to fix this, It will be of great help!
Here's the code:
[ICODE] [CODE=c]/* * GLUT Shapes Demo * * Written by Nigel Stewart November 2003 * * This program is test harness for the sphere, cone * and torus shapes in GLUT. * * This was edited by the creator of this game. * Nigel Stewart's code was used as a foundation. */ #ifdef __APPLE__ #include <GLUT/glut.h> #else #include <GL/glut.h> #endif #include <stdlib.h> #include <math.h> #define PI 3.14159265358979323846 GLfloat x = 1.0f; GLfloat y = -2.0f; GLfloat z = -7.0f; GLfloat Rotation = 0.0f; GLfloat moveDirectionX = 0.0f; GLfloat moveDirectionZ = -1.0f; // Initial movement direction /* GLUT callback Handlers */ static void resize(int width, int height) { const float ar = (float) width / (float) height; glViewport(0, 0, width, height); glMatrixMode(GL_PROJECTION); glLoadIdentity(); glFrustum(-ar, ar, -1.0, 1.0, 2.0, 100.0); glMatrixMode(GL_MODELVIEW); glLoadIdentity() ; } static void display(void) { const double t = glutGet(GLUT_ELAPSED_TIME) / 1000.0; const double a = t*90.0; glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glColor3d(0,0,1); glPushMatrix(); glTranslatef(x, y, z); glRotatef(Rotation, 0, 1, 0); glutSolidCube(3); glPopMatrix(); glutSwapBuffers(); } static void key(unsigned char key, int x, int y) { switch (key) { case 27 : exit(0); break; case 'w': z--; break; case 's': z++; break; case 'a': x++; break; case 'd': x--; break; } glutPostRedisplay(); } static void idle(void) { glutPostRedisplay(); } const GLfloat light_ambient[] = { 0.0f, 0.0f, 0.0f, 1.0f }; const GLfloat light_diffuse[] = { 1.0f, 1.0f, 1.0f, 1.0f }; const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f }; const GLfloat light_position[] = { 2.0f, 5.0f, 5.0f, 0.0f }; const GLfloat mat_ambient[] = { 0.7f, 0.7f, 0.7f, 1.0f }; const GLfloat mat_diffuse[] = { 0.8f, 0.8f, 0.8f, 1.0f }; const GLfloat mat_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f }; const GLfloat high_shininess[] = { 100.0f }; /* Program entry point */ int main(int argc, char *argv[]) { glutInit(&argc, argv); glutInitWindowSize(640,480); glutInitWindowPosition(10,10); glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH); glutCreateWindow("Gemu"); glutReshapeFunc(resize); glutDisplayFunc(display); glutKeyboardFunc(key); glutIdleFunc(idle); glClearColor(1,1,1,1); glEnable(GL_CULL_FACE); glCullFace(GL_BACK); glEnable(GL_DEPTH_TEST); glDepthFunc(GL_LESS); glEnable(GL_LIGHT0); glEnable(GL_NORMALIZE); glEnable(GL_COLOR_MATERIAL); glEnable(GL_LIGHTING); glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient); glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse); glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular); glLightfv(GL_LIGHT0, GL_POSITION, light_position); glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient); glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse); glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular); glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess); glutMainLoop(); return EXIT_SUCCESS; }[/CODE]
[/ICODE]
 
Last edited by A_stream,

catlover007

Developer
Developer
Joined
Oct 23, 2015
Messages
722
Trophies
1
XP
3,956
Country
Germany
1. please mark your code as code, it makes it soo much easier to read (see the picture how to do it)
2. the issue is probably in this function: static void key(unsigned char key, int x, int y)

the x and y parameter shadow your global x and y variables because they have the same name (i.e. you access them instead of your global x and y variable). Thus you modify the parameters not your global x and y variables.

3. Learning old fashioned OpenGL 1.x is nowdays really not that good of an idea anymore. It doesn't really have anything to do with how GPUs nowdays work, it is only provided through a compability layer of the driver for old applications.

Either try learning modern OpenGL as they call it (https://learnopengl.com/ and https://open.gl/ are good resources) or maybe take a long at https://www.raylib.com/ It works a bit similar to fixed pipeline OpenGL, but you can do a lot more with it.

1713653946697.png
 

A_stream

Member
OP
Newcomer
Joined
Apr 20, 2023
Messages
13
Trophies
0
Age
29
XP
264
Country
Bulgaria
1. please mark your code as code, it makes it soo much easier to read (see the picture how to do it)
2. the issue is probably in this function: static void key(unsigned char key, int x, int y)

the x and y parameter shadow your global x and y variables because they have the same name (i.e. you access them instead of your global x and y variable). Thus you modify the parameters not your global x and y variables.

3. Learning old fashioned OpenGL 1.x is nowdays really not that good of an idea anymore. It doesn't really have anything to do with how GPUs nowdays work, it is only provided through a compability layer of the driver for old applications.

Either try learning modern OpenGL as they call it (https://learnopengl.com/ and https://open.gl/ are good resources) or maybe take a long at https://www.raylib.com/ It works a bit similar to fixed pipeline OpenGL, but you can do a lot more with it.

View attachment 432818
Damn. MY HERO! It works!!!
1. Thanks for showing me, how to make the code more readable(will keep that in mind for the future).
2. Thanks for clearing that up, with the keyboard.
3. Yeah I tried to use modern OpenGl tutorials, but for some reason I couldn't set them up for vsCode or CodeBlocks and I decided to just use the plain old OpenGl template on CodeBlocks and for now it's doing it's job, also don't get me wrong I will try and setup maybe the GLFW template or do something else that uses modern tools. As for Raylib, I tried learning it and was doing a lot of progress in understanding it, but one day it decided to not get my mouse input at all, then decided that It will not draw any objects on screen (not even billboards), then I reinstalled the library but it still didn't work, so I decided to give up.
 

Site & Scene News

Popular threads in this forum

General chit-chat
Help Users
  • No one is chatting at the moment.
  • SylverReZ @ SylverReZ:
    @Materia_tofu, We do learn a lot from plenty of talented individuals.
  • Materia_tofu @ Materia_tofu:
    this is true! i learned how to make soundfont remixes from a friend back in 2021
    +1
  • BakerMan @ BakerMan:
    Update on my brother: He's home now, tired and hungry, obviously, but other than that, seems to be doing fine.
    +2
  • Veho @ Veho:
    That's a relief to hear. Do you know what happened?
  • SylverReZ @ SylverReZ:
    @BakerMan, Any idea what happened? I hope that your brother's doing good.
  • BakerMan @ BakerMan:
    Well, from what I've heard from my parents, he had a seizure last night, perhaps an epileptic episode, fucking died, had a near death experience, my dad called the paramedics, they showed up, took him to the hospital, and he woke up covered in tubes, and started complaining.
  • BakerMan @ BakerMan:
    He couldn't eat until after his MRI, when he had a bomb pop.
  • BakerMan @ BakerMan:
    What matters now is that he's doing alright.
  • Veho @ Veho:
    But you still don't know what it was?
  • Veho @ Veho:
    Has he had seizures before?
  • The Real Jdbye @ The Real Jdbye:
    apparently stress can cause seizures, my brother had one during a test once
  • The Real Jdbye @ The Real Jdbye:
    never had one before that, and never had one since
  • Redleviboy123 @ Redleviboy123:
    Question about game texture chanching Do i need an own game id?
  • The Real Jdbye @ The Real Jdbye:
    @Veho for those that want to
    experience being sonic the hedgehog
  • Veho @ Veho:
    Ah, you mean
    furries.
    +1
  • The Real Jdbye @ The Real Jdbye:
    well, sonic fans are a whole separate thing from furries
  • The Real Jdbye @ The Real Jdbye:
    like bronys
  • The Real Jdbye @ The Real Jdbye:
    sonic porn is too weird even for me
  • Dumpflam @ Dumpflam:
    bruh
  • Dumpflam @ Dumpflam:
    guys how do i delete a post
  • The Real Jdbye @ The Real Jdbye:
    you don't
  • The Real Jdbye @ The Real Jdbye:
    you can report it and request deletion
  • BakerMan @ BakerMan:
    Also, no, that was his first time having a seizure, and hopefully the last
    +1
    BakerMan @ BakerMan: Also, no, that was his first time having a seizure, and hopefully the last +1