void QVROSGViewer::render(QVRWindow* /* w */,
const QVRRenderContext& context, int viewPass, unsigned int texture)
{
// Set up framebuffer object to render into
GLint width, height;
glBindTexture(GL_TEXTURE_2D, texture);
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &width);
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &height);
glBindTexture(GL_TEXTURE_2D, _fboDepthTex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, width, height,
0, GL_DEPTH_COMPONENT, GL_FLOAT, NULL);
glBindFramebuffer(GL_FRAMEBUFFER, _fbo);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, texture, 0);
// Set up OSG graphics window
_graphicsWindow->resized(0, 0, width, height);
// Set up OSG camera
QMatrix4x4 P = context.frustum(viewPass).toMatrix4x4();
_viewer.getCamera()->setProjectionMatrix(osg::Matrix(P.constData()));
QMatrix4x4 V = context.viewMatrix(viewPass);
_viewer.getCamera()->setViewMatrix(osg::Matrix(V.constData()));
// Render
_viewer.frame();
}
void QVRMinimalExample::render(QVRWindow* /* w */,
const QVRRenderContext& context, int viewPass,
unsigned int texture)
{
// Set up framebuffer object to render into
GLint width, height;
glBindTexture(GL_TEXTURE_2D, texture);
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &width);
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &height);
glBindTexture(GL_TEXTURE_2D, _fboDepthTex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, width, height,
0, GL_DEPTH_COMPONENT, GL_FLOAT, NULL);
glBindFramebuffer(GL_FRAMEBUFFER, _fbo);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, texture, 0);
// Set up view
glViewport(0, 0, width, height);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
QMatrix4x4 projectionMatrix = context.frustum(viewPass).toMatrix4x4();
QMatrix4x4 viewMatrix = context.viewMatrix(viewPass);
// Set up shader program
glUseProgram(_prg.programId());
_prg.setUniformValue("projection_matrix", projectionMatrix);
glEnable(GL_DEPTH_TEST);
// Render
QMatrix4x4 modelMatrix;
modelMatrix.translate(0.0f, 0.0f, -15.0f);
modelMatrix.rotate(_rotationAngle, 1.0f, 0.5f, 0.0f);
QMatrix4x4 modelViewMatrix = viewMatrix * modelMatrix;
_prg.setUniformValue("modelview_matrix", modelViewMatrix);
_prg.setUniformValue("normal_matrix", modelViewMatrix.normalMatrix());
glBindVertexArray(_vao);
glDrawElements(GL_TRIANGLES, _vaoIndices, GL_UNSIGNED_INT, 0);
}