opengl - glTranslatef does not work -


in project want render rain, use particles.

my render method:

public void draw(camera camera) {     glbegin(gl_points);          glpushmatrix();      gltranslatef(camera.getx(), camera.geteyelevel(), camera.gety());      glcolor4f(0, 0, 0.8f, 0.1f);      for(int = 0; < _currentparticlescount; i++)     {         _particles[i].draw();     }      glpopmatrix();     glend(); }

rain particle init method:

particle.setx(utils.random.nextfloat() * rain_radius * (utils.random.nextboolean() ? 1 : -1)); particle.sety(utils.random.nextfloat() * rain_radius); particle.setz(utils.random.nextfloat() * rain_radius * (utils.random.nextboolean() ? 1 : -1));

you see want translate particles camera's place - relative player. there 1 problem, gltranslatef n't work. see particles in beginning of world's coordinate system.

in fact, when draw stars (particles) using same principle, gltranslatef works properly.

stars render method:

gldisable(gl_depth_test);  glpushmatrix();      gltranslatef(camera.getx(), camera.geteyelevel(), camera.gety());  glbegin(gl_points);  glcolor3f(1, 1, 1);  for(int = 0; < stars_count; i++) {     _starsarray[i].draw(); }  glend();  glpopmatrix(); glenable(gl_depth_test);

what doing wrong?

p. s. use opengl 1.1 lwjgl, java opengl wrapper (lwjgl.org)

gltranslatef won't work because it's between glbegin/glend.

you can use glgeterror() (eg) make finding bugs easier.


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