java - How to set the camera within a cube? -

i have cube has different color each side-lock -

public void display(glautodrawable drawable) {          final gl gl = drawable.getgl();         gl.glclear(gl.gl_color_buffer_bit | gl.gl_depth_buffer_bit);             ///// set camera  /////           setcamera(gl, glu, 100);             // /////// cube - start ///////////          // cube          // ----- render color cube -----         gl.glloadidentity(); // reset current model-view matrix         gl.gltranslatef(0f, 0.0f, -7.0f); // translate right ,                                                 // screen         gl.glrotatef(anglecube, 1.0f, 1.0f, 1.0f); // rotate x, y ,                                                     // z-axes          gl.glbegin(gl.gl_quads); // of color cube          // top-face         gl.glcolor3f(0.0f, 1.0f, 0.0f); // green         gl.glvertex3f(1.0f, 1.0f, -1.0f);         gl.glvertex3f(-1.0f, 1.0f, -1.0f);         gl.glvertex3f(-1.0f, 1.0f, 1.0f);         gl.glvertex3f(1.0f, 1.0f, 1.0f);          // bottom-face         gl.glcolor3f(1.0f, 0.5f, 0.0f); // orange         gl.glvertex3f(1.0f, -1.0f, 1.0f);         gl.glvertex3f(-1.0f, -1.0f, 1.0f);         gl.glvertex3f(-1.0f, -1.0f, -1.0f);         gl.glvertex3f(1.0f, -1.0f, -1.0f);          // front-face         gl.glcolor3f(1.0f, 0.0f, 0.0f); // red         gl.glvertex3f(1.0f, 1.0f, 1.0f);         gl.glvertex3f(-1.0f, 1.0f, 1.0f);         gl.glvertex3f(-1.0f, -1.0f, 1.0f);         gl.glvertex3f(1.0f, -1.0f, 1.0f);          // back-face         gl.glcolor3f(1.0f, 1.0f, 0.0f); // yellow         gl.glvertex3f(1.0f, -1.0f, -1.0f);         gl.glvertex3f(-1.0f, -1.0f, -1.0f);         gl.glvertex3f(-1.0f, 1.0f, -1.0f);         gl.glvertex3f(1.0f, 1.0f, -1.0f);          // left-face         gl.glcolor3f(0.0f, 0.0f, 1.0f); // blue         gl.glvertex3f(-1.0f, 1.0f, 1.0f);         gl.glvertex3f(-1.0f, 1.0f, -1.0f);         gl.glvertex3f(-1.0f, -1.0f, -1.0f);         gl.glvertex3f(-1.0f, -1.0f, 1.0f);          // right-face         gl.glcolor3f(1.0f, 0.0f, 1.0f); // violet         gl.glvertex3f(1.0f, 1.0f, -1.0f);         gl.glvertex3f(1.0f, 1.0f, 1.0f);         gl.glvertex3f(1.0f, -1.0f, 1.0f);         gl.glvertex3f(1.0f, -1.0f, -1.0f);          gl.glend(); // of color cube          // /////// cube - end //////////        }  private void setcamera(gl gl, glu glu, float distance) {         // change projection matrix.         gl.glmatrixmode(gl.gl_projection);         gl.glloadidentity();          // perspective.         float widthheightratio = (float) getwidth() / (float) getheight();         glu.gluperspective(1, widthheightratio, 1, 1000);         glu.glulookat(0,0, 150, 0, 0, 0, 0, 1, 0);          // change model view matrix.         gl.glmatrixmode(gl.gl_modelview);         gl.glloadidentity();     } 

at state - figure -

means camera located in front of cube .

since trying set camera within cube , change z-axis value in glu.glulookat - glu.glulookat(0,0, 50, 0, 0, 0, 0, 1, 0); , know -

and if change - glu.glulookat(0,0, 0, 0, 0, 0, 0, 1, 0); whole screen black .

so , have change in order set camera within cube - means excepted figure different color in right , left , down .

glu.glulookat(0, 0, 0, 0, 0, 0, 0, 1, 0) doesn't seem valid. try setting glu.glulookat(0, 0, 0, 0, 0, -1, 0, 1, 0)

edit:

1. remove gltranslatef

2.  glu.gluperspective(100, widthheightratio, 0.5, 1000); glu.glulookat(0, 0, 0.0, 0.0, 0, -1.0, 0, 1, 0);