// ok let's start things up
void GPUVolRTV0::init(DrawEnv *pEnv)
{
create_volumetexture();
load_vertex_program (vertexprog, "raycasting_shader.vp.cg");
load_fragment_program(fragmentprog,"raycasting_shader.fp.cg");
shaderprog = glCreateProgram();
glAttachShader(shaderprog, vertexprog);
glAttachShader(shaderprog, fragmentprog);
glLinkProgram(shaderprog);
check_program_status(shaderprog);
stepsizeLoc = glGetUniformLocation(shaderprog, "stepsize");
mvLoc = glGetUniformLocation(shaderprog, "ModelView");
mpLoc = glGetUniformLocation(shaderprog, "Proj");
texLoc = glGetUniformLocation(shaderprog, "tex");
volumeTexLoc = glGetUniformLocation(shaderprog, "volume_tex");
// Create the to FBO's one for the backside of the volumecube and one for the finalimage rendering
glGenFramebuffersEXT(1, &framebuffer);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT,framebuffer);
glGenTextures(1, &backface_buffer);
glBindTexture(GL_TEXTURE_2D, backface_buffer);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
// glTexImage2D(GL_TEXTURE_2D, 0,GL_RGBA16F_ARB, WINDOW_SIZE, WINDOW_SIZE, 0, GL_RGBA, GL_FLOAT, NULL);
glTexImage2D(GL_TEXTURE_2D, 0,GL_RGBA16F_ARB,
pEnv->getPixelWidth(),
pEnv->getPixelHeight(),
0, GL_RGBA, GL_FLOAT, NULL);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, backface_buffer, 0);
glGenTextures(1, &final_image);
glBindTexture(GL_TEXTURE_2D, final_image);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
// glTexImage2D(GL_TEXTURE_2D, 0,GL_RGBA16F_ARB, WINDOW_SIZE, WINDOW_SIZE, 0, GL_RGBA, GL_FLOAT, NULL);
glTexImage2D(GL_TEXTURE_2D, 0,GL_RGBA16F_ARB,
pEnv->getPixelWidth(),
pEnv->getPixelHeight(),
0, GL_RGBA, GL_FLOAT, NULL);
glGenRenderbuffersEXT(1, &renderbuffer);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, renderbuffer);
// glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT, WINDOW_SIZE, WINDOW_SIZE);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT,
pEnv->getPixelWidth(), pEnv->getPixelHeight());
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, renderbuffer);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
bInitialized = true;
}
void cgtk::init()
{
cout << "glew init " << endl;
GLenum err = glewInit();
// initialize all the OpenGL extensions
glewGetExtension("glMultiTexCoord2fvARB");
if(glewGetExtension("GL_EXT_framebuffer_object") )cout << "GL_EXT_framebuffer_object support " << endl;
if(glewGetExtension("GL_EXT_renderbuffer_object"))cout << "GL_EXT_renderbuffer_object support " << endl;
if(glewGetExtension("GL_ARB_vertex_buffer_object")) cout << "GL_ARB_vertex_buffer_object support" << endl;
if(GL_ARB_multitexture)cout << "GL_ARB_multitexture support " << endl;
if (glewGetExtension("GL_ARB_fragment_shader") != GL_TRUE ||
glewGetExtension("GL_ARB_vertex_shader") != GL_TRUE ||
glewGetExtension("GL_ARB_shader_objects") != GL_TRUE ||
glewGetExtension("GL_ARB_shading_language_100") != GL_TRUE)
{
cout << "Driver does not support OpenGL Shading Language" << endl;
exit(1);
}
//glEnable(GL_CULL_FACE);
glClearColor(0.0, 0.0, 0.0, 0);
create_volumetexture();
//load_volumetexture_k("data\\output31_int.bin");
//load_volumetexture_step("data\\step_by_step2.bin");
// CG init
//cgSetErrorCallback(cgErrorCallback);
context = cgCreateContext();
if (cgGLIsProfileSupported(CG_PROFILE_VP40))
{
vertexProfile = CG_PROFILE_VP40;
cout << "CG_PROFILE_VP40 supported." << endl;
}
else
{
if (cgGLIsProfileSupported(CG_PROFILE_ARBVP1))
vertexProfile = CG_PROFILE_ARBVP1;
else
{
cout << "Neither arbvp1 or vp40 vertex profiles supported on this system." << endl;
exit(1);
}
}
if (cgGLIsProfileSupported(CG_PROFILE_FP40))
{
fragmentProfile = CG_PROFILE_FP40;
cout << "CG_PROFILE_FP40 supported." << endl;
}
else
{
if (cgGLIsProfileSupported(CG_PROFILE_ARBFP1))
fragmentProfile = CG_PROFILE_ARBFP1;
else
{
cout << "Neither arbfp1 or fp40 fragment profiles supported on this system." << endl;
exit(1);
}
}
// load the vertex and fragment raycasting programs
load_vertex_program(vertex_main,"raycasting_shader.cg","vertex_main");
cgErrorCallback();
load_fragment_program(fragment_main,"raycasting_shader.cg","fragment_main");
cgErrorCallback();
// Create the to FBO's one for the backside of the volumecube and one for the finalimage rendering
glGenFramebuffersEXT(1, &framebuffer);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT,framebuffer);
glGenTextures(1, &backface_buffer);
glBindTexture(GL_TEXTURE_RECTANGLE_ARB, backface_buffer);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0,GL_RGBA16F_ARB, WINDOW_SIZE_W, WINDOW_SIZE_H, 0, GL_RGBA, GL_FLOAT, NULL);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_RECTANGLE_ARB, backface_buffer, 0);
glGenTextures(1, &final_image);
glBindTexture(GL_TEXTURE_RECTANGLE_ARB, final_image);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0,GL_RGBA16F_ARB, WINDOW_SIZE_W, WINDOW_SIZE_H, 0, GL_RGBA, GL_FLOAT, NULL);
glGenRenderbuffersEXT(1, &renderbuffer);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, renderbuffer);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT, WINDOW_SIZE_W, WINDOW_SIZE_H);
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, renderbuffer);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
}
