OpenGL: GL_DEPTH_TEST doesn't sesm to work

Boy2melo

Hi everyone,

I am trying to intigrate an OpenGL rendered scene in QML. I have looked at the "openglundqml" example and have developed my program accordingly. Till now everything works fine except that I somehow don't seem to get the GL_DEPTH_TEST to work.

When I use the function "glIsEnabled(GL_DEPTH_TEST)" it returns true, yet the object are rendered ontop of each other.

Here is my code of the "paint()" routine.

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if(!mpOglProgram)
{
mpOglProgram = new QOpenGLShaderProgram();
mpOglProgram->addShaderFromSourceFile(QOpenGLShader::Vertex, ":/cbasic.vsh");
mpOglProgram->addShaderFromSourceFile(QOpenGLShader::Fragment, ":/cbasic.fsh");
mpOglProgram->link();
}

mpOglProgram->bind();

// Clear color and depth buffer
glClearColor(0,0,0,1);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

QMatrix4x4 modelMat;
QMatrix4x4 viewMat;

QMatrix4x4 cameraTransformation;
cameraTransformation.rotate(mRotAlpha, 0, 1, 0);
cameraTransformation.rotate(mRotBeta, 1, 0, 0);

QVector3D cameraPosition = cameraTransformation * QVector3D(mTranslX, mTranslY, mTranslZ);
QVector3D cameraUpDirection = cameraTransformation * QVector3D(0, 1, 0);

viewMat.lookAt(cameraPosition, cameraTransformation * QVector3D(mTranslX, mTranslY, 0), cameraUpDirection);

modelMat.setToIdentity();

QMatrix4x4 modelViewMat;
modelViewMat = viewMat * modelMat;

QMatrix3x3 normalMat;
normalMat = modelViewMat.normalMatrix();

// Set modelview-projection matrix
mpOglProgram->setUniformValue("mvpMatrix", mProjectionMat * modelViewMat);

glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);

glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);

GLfloat light_position[] = {1.0, 1.0, -1, 1,0};
GLfloat light_specular[] = {1.0, 1.0, 1.0, 1.0};
GLfloat light_diffuse[] = {0.5, 0.5, 0.5, 1.0};
GLfloat light_ambient[] = {0.128f, 0.128f, 0.128f, 1.0f};
GLfloat spot_exponent[] = {5};

glLightfv(GL_LIGHT0, GL_POSITION, light_position);
glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
glLightfv(GL_LIGHT0, GL_SPOT_EXPONENT, spot_exponent);

mCube.draw(mpOglProgram);
mCamera.draw(mpOglProgram);

mpOglProgram->release();

@

Help is very much apreciated. Thank you :)