// This display function is called once pr frame
void GPUVolRTV0::display(DrawEnv *pEnv)
{
// was in init before. As OpenSG resets those they have to be
// restored to the required values
glEnable(GL_CULL_FACE);
glClearColor(0.0, 0.0, 0.0, 0);
glDisable(GL_LIGHTING);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
// end
static float rotate = 0;
rotate += 0.25;
// resize(WINDOW_SIZE,WINDOW_SIZE);
resize(pEnv->getPixelWidth(), pEnv->getPixelHeight());
enable_renderbuffers();
glLoadIdentity();
glTranslatef(0,0,-2.25);
glRotatef(rotate,0,1,1);
glTranslatef(-0.5,-0.5,-0.5); // center the texturecube
glGetFloatv(GL_MODELVIEW_MATRIX, mModelView);
glGetFloatv(GL_PROJECTION_MATRIX, mProj);
render_backface();
raycasting_pass();
disable_renderbuffers();
render_buffer_to_screen(pEnv);
// glutSwapBuffers();
}
void cgtk::raycasting_pass()
{
disable_renderbuffers();
//glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,GL_COLOR_ATTACHMENT0_EXT,GL_TEXTURE_RECTANGLE_ARB,final_image,0);
//glClearColor(0,0,0,0);
//glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
cgGLEnableProfile(vertexProfile);
cgGLEnableProfile(fragmentProfile);
cgGLBindProgram(vertex_main);
cgGLBindProgram(fragment_main);
cgGLSetParameter1f(cgGetNamedParameter(fragment_main,"stepsize"),stepsize);
cgGLSetParameter1f(cgGetNamedParameter(fragment_main,"width"),WINDOW_SIZE_W);
cgGLSetParameter1f(cgGetNamedParameter(fragment_main,"heigth"),WINDOW_SIZE_H);
set_tex_param("tex",backface_buffer,fragment_main,param1);
set_tex_param("volume_tex",volume_texture,fragment_main,param2);
glEnable(GL_BLEND);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
//drawQuads(1,1,1,b);
drawBd();
cgGLDisableProfile(vertexProfile);
cgGLDisableProfile(fragmentProfile);
glDisable(GL_CULL_FACE);
glDisable(GL_BLEND);
}
/**
* @brief ParticleSystem Render
*/
bool ParticleSystem::Render(void) {
viewAspect = wWidth / static_cast<float>(wHeight);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
projMX =
glm::perspective(static_cast<float>(fovY), viewAspect, 0.01f, 100.0f);
// --------------------------------------------------
// draw to FBO
// --------------------------------------------------
enable_renderbuffers();
drawToFBO();
disable_renderbuffers();
// --------------------------------------------------
// draw fullscreen quad
// --------------------------------------------------
drawQuad();
PostRedisplay();
return false;
}
