void ProcessSelection(int xPos, int yPos)
{
static GLuint selectBuff[BUFFER_LENGTH];
GLint hits, viewport[4];
glSelectBuffer(BUFFER_LENGTH, selectBuff);
glGetIntegerv(GL_VIEWPORT, viewport);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glRenderMode(GL_SELECT);
glLoadIdentity();
gluPickMatrix(xPos, viewport[3] - yPos + viewport[1], 2,2, viewport);
gluPerspective(60.0f, fAspect, 1.0, 1000.0);
DrawObjects();
hits = glRenderMode(GL_RENDER);
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
if(hits == 1)
{
MakeSelection(selectBuff[3]);
if(selectedObject == selectBuff[3])
selectedObject = 0;
else
selectedObject = selectBuff[3];
}
printf("holaaaaa donde estoy en %d , %d\n", xPos, yPos);
glutPostRedisplay();
}
void handleSelection(int x, int y)
{
glInitNames();
GLuint hitBuffer[64] = {0};
glSelectBuffer(64, hitBuffer);
glRenderMode(GL_SELECT);
GLint vp[4];
glGetIntegerv(GL_VIEWPORT,vp);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
gluPickMatrix(x,currentRes[1]-y,5.0,5.0,vp);
gluPerspective(45.0,RESOLUTION_X/RESOLUTION_Y, 0.5, 50.0);
glScalef((float)RESOLUTION_X/currentRes[0], (float)RESOLUTION_Y/currentRes[1], 1.0);
glMatrixMode(GL_MODELVIEW);
renderScene();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glFlush();
GLint hitCount = glRenderMode(GL_RENDER);
listSelected(hitCount, hitBuffer);
glMatrixMode(GL_MODELVIEW);
}
Block *
click(int x, int y, int *face)
{
GLuint buffer[BUFFER_SIZE];
GLint viewport[4];
GLint hits;
glGetIntegerv(GL_VIEWPORT, viewport);
glSelectBuffer(BUFFER_SIZE, buffer);
glRenderMode(GL_SELECT);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
gluPickMatrix((GLdouble) x, (GLdouble) (viewport[3]-y), 1.0f, 1.0f, viewport);
gluPerspective(FOV, (GLfloat) (WINDOW_WIDTH/WINDOW_HEIGHT), Z_NEAR, Z_FAR);
glMatrixMode(GL_MODELVIEW);
redraw_world();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
hits=glRenderMode(GL_RENDER);
return processHits(hits, buffer, face);
}
std::vector<GUIGlID>
GUISUMOAbstractView::getObjectsInBoundary(const Boundary& bound) {
const int NB_HITS_MAX = 1024 * 1024;
// Prepare the selection mode
static GUIGlID hits[NB_HITS_MAX];
static GLint nb_hits = 0;
glSelectBuffer(NB_HITS_MAX, hits);
glInitNames();
Boundary oldViewPort = myChanger->getViewport(false); // backup the actual viewPort
myChanger->setViewport(bound);
applyGLTransform(false);
// paint in select mode
int hits2 = doPaintGL(GL_SELECT, bound);
// Get the results
nb_hits = glRenderMode(GL_RENDER);
if (nb_hits == -1) {
myApp->setStatusBarText("Selection in boundary failed. Try to select fewer than " + toString(hits2) + " items");
}
std::vector<GUIGlID> result;
for (int i = 0; i < nb_hits; ++i) {
assert(i * 4 + 3 < NB_HITS_MAX);
result.push_back(hits[i * 4 + 3]);
}
// switch viewport back to normal
myChanger->setViewport(oldViewPort);
return result;
}
void gl_select(int x, int y){
GLuint buff[64] = {0};
GLint hits, view[4];
glSelectBuffer(64, buff);
glGetIntegerv(GL_VIEWPORT, view);
glRenderMode(GL_SELECT);
glInitNames();
glPushName(0);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
gluPickMatrix(x,y,1.0,1.0,view);
gluPerspective(45,1.0,0.0001,1000.0);
glMatrixMode(GL_MODELVIEW);
glutSwapBuffers();
draw();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
hits = glRenderMode(GL_RENDER);
list_hits(hits,buff);
glMatrixMode(GL_MODELVIEW);
}
TokenId KPboardView::Selection(const Camera &camera, int x, int y) const
{
GLuint buffer[BUF_SIZE]; // Set Up A Selection Buffer
auto choose = TokenId::EMPTY;
glSelectBuffer(BUF_SIZE, buffer);
glRenderMode(GL_SELECT); // Change to Selection mode
glInitNames();
glPushName(0); // Push 0 (At Least One Entry) Onto The Stack
camera.Draw(x, y);
Draw(true); // Draw the tokens (not the board)
auto hits = glRenderMode(GL_RENDER); // Change back to render mode
if (hits > 0)
{
choose = static_cast<TokenId>(buffer[3]);
auto depth = buffer[1];
for (auto loop = 1; loop < hits; loop++)
{
if (buffer[loop * 4 + 1] < GLuint(depth))
{
// store the closest object
choose = static_cast<TokenId>(buffer[loop * 4 + 3]);
depth = buffer[loop * 4 + 1];
}
}
}
return choose;
}
bool C3dView::BeginSelect ( int x, int y )
{
if (m_bDrawing )
return false;
m_bDrawing = true;
m_bOverlayMode = false;
m_bForcedDrawing = false;
GLint viewport[4] = {0};
memset(m_uiSelectBuf,0,sizeof(GLuint)*_SEL_BUFFER_SIZE);
glGetIntegerv(GL_VIEWPORT, viewport);
glSelectBuffer(_SEL_BUFFER_SIZE, m_uiSelectBuf);
glRenderMode(GL_SELECT);
glInitNames();
glPushName(0xffffffff);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
gluPickMatrix((GLdouble) x, (GLdouble) (viewport[3] - y),2.0, 2.0, viewport);
gluPerspective (m_fov,m_fAspect,m_xNearZ,m_xFarZ);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
SetInitalMatrix();
return true;
}
static gboolean on_motion_notify(GritsOpenGL *opengl, GdkEventMotion *event, gpointer _)
{
gdouble height = GTK_WIDGET(opengl)->allocation.height;
gdouble gl_x = event->x;
gdouble gl_y = height - event->y;
/* Configure view */
gint viewport[4];
gdouble projection[16];
glGetIntegerv(GL_VIEWPORT, viewport);
glGetDoublev(GL_PROJECTION_MATRIX, projection);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
gluPickMatrix(gl_x, gl_y, 2, 2, viewport);
glMultMatrixd(projection);
/* Prepare for picking */
guint buffer[100][4] = {};
glSelectBuffer(G_N_ELEMENTS(buffer), (guint*)buffer);
glRenderMode(GL_SELECT);
glInitNames();
/* Run picking */
g_mutex_lock(opengl->objects_lock);
GPtrArray *objects = _objects_to_array(opengl);
for (guint i = 0; i < objects->len; i++) {
glPushName(i);
GritsObject *object = objects->pdata[i];
object->state.picked = FALSE;
grits_object_pick(object, opengl);
glPopName();
}
int hits = glRenderMode(GL_RENDER);
g_debug("GritsOpenGL: on_motion_notify - hits=%d ev=%.0lf,%.0lf",
hits, gl_x, gl_y);
for (int i = 0; i < hits; i++) {
//g_debug("\tHit: %d", i);
//g_debug("\t\tcount: %d", buffer[i][0]);
//g_debug("\t\tz1: %f", (float)buffer[i][1]/0x7fffffff);
//g_debug("\t\tz2: %f", (float)buffer[i][2]/0x7fffffff);
//g_debug("\t\tname: %p", (gpointer)buffer[i][3]);
guint index = buffer[i][3];
GritsObject *object = objects->pdata[index];
object->state.picked = TRUE;
}
for (guint i = 0; i < objects->len; i++) {
GritsObject *object = objects->pdata[i];
grits_object_set_pointer(object, object->state.picked);
}
g_ptr_array_free(objects, TRUE);
g_mutex_unlock(opengl->objects_lock);
/* Cleanup */
glMatrixMode(GL_PROJECTION);
glPopMatrix();
return FALSE;
}
bool Renderer::offsetOnPoint(int x, int y, int& out)
{
GLuint buf[256];
glSelectBuffer(256, buf);
glRenderMode(GL_SELECT);
setProjectionMatrix(true, x, y);
glInitNames();
drawScene(true);
GLint hits = glRenderMode(GL_RENDER);
setProjectionMatrix();
GLuint *p = buf;
GLuint minZ = INFINITE;
GLuint selectedName = 0;
for (int i=0; i < hits; i++){
GLuint names = *p; p++;
GLuint z = *p; p++; p++;
if ((names > 1) && (z < minZ) && (*p == SELECTION_COVERS)){
minZ = z;
selectedName = *(p+1);
}
p += names;
}
if (minZ != INFINITE){
out = (selectedName - SELECTION_CENTER);
return true;
} else {
return false;
}
}
/* Initialize material property and light source. */
void
myinit(void)
{
GLfloat light_ambient[] =
{0.2, 0.2, 0.2, 1.0};
GLfloat light_diffuse[] =
{1.0, 1.0, 1.0, 1.0};
GLfloat light_specular[] =
{1.0, 1.0, 1.0, 1.0};
GLfloat light_position[] =
{1.0, 1.0, 1.0, 0.0};
glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
glLightfv(GL_LIGHT0, GL_POSITION, light_position);
glEnable(GL_LIGHT0);
glDepthFunc(GL_LESS);
glEnable(GL_DEPTH_TEST);
glEnable(GL_LIGHTING);
glSelectBuffer(BUFSIZE, selectBuf);
glNewList(TORUS, GL_COMPILE);
glutSolidTorus(0.275, 0.85, 10, 15);
glEndList();
glNewList(TETRAHEDRON, GL_COMPILE);
glutSolidTetrahedron();
glEndList();
glNewList(ICOSAHEDRON, GL_COMPILE);
glutSolidIcosahedron();
glEndList();
}
void mouse(int button, int state, int x, int y) {
if (button != GLUT_LEFT_BUTTON || state != GLUT_DOWN) return;
GLuint select_buf[BUFSIZE];
GLint hits;
GLint viewport[4];
glGetIntegerv(GL_VIEWPORT, viewport);
glSelectBuffer(BUFSIZE, select_buf);
(void) glRenderMode(GL_SELECT);
glInitNames();
glPushName(0);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
gluPickMatrix((GLdouble) x, (GLdouble) viewport[3] - y, 20.0, 20.0, viewport);
gluPerspective(45.0, width / (double) height, .2, 200.0);
scene.render(true);
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glFlush();
hits = glRenderMode(GL_RENDER);
if (hits != 0) processHits(hits, select_buf);
glutPostRedisplay();
}
void Engine::init()
{
// Create the main window
app = new sf::Window(sf::VideoMode(800, 600, 32), "3DS Loader");
// Create a clock for measuring time elapsed
clock = new sf::Clock;
model = new Model3DS(cfg::modelName);
if (!model->load("test.3ds")) {
cout << "Can't find model file!" << endl;
exit(1);
}
glSelectBuffer(cfg::selectBufferSize, selectBuffer);
// Set color and depth clear value
//glClearDepth(1.f);
glClearColor(0.f, 0.f, 0.f, 1.f);
// Enable Z-buffer read and write
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
// Light
glEnable(GL_LIGHTING);
glLightfv(GL_LIGHT0, GL_AMBIENT, cfg::ambientColor);
glLightfv(GL_LIGHT0, GL_DIFFUSE, cfg::diffuseColor);
glLightfv(GL_LIGHT0, GL_SPECULAR, cfg::specularColor);
glEnable(GL_LIGHT0);
}
void
Setup3dSelect ( Viewer3dParam *par, GLuint *buffer, int cursorX, int cursorY )
{
GLint viewport[4];
glSelectBuffer(SELECT_BUFSIZE, buffer);
glRenderMode(GL_SELECT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glGetIntegerv(GL_VIEWPORT,viewport);
gluPickMatrix(cursorX,viewport[3]-cursorY,
5,5,viewport);
float ratio = 1.386;
gluPerspective(par->fov, ratio, par->zNear, par->zFar);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(par->eye[0],par->eye[1],par->eye[2],
par->unit[0],par->unit[1],par->unit[2],
par->up[0],par->up[1],par->up[2]);
glInitNames();
}
void selectObject(x, y) {
GLuint selectBuffer[BUFSIZE];
GLint hitsNumber;
GLint viewPort[4];
glGetIntegerv(GL_VIEWPORT, viewPort);
glSelectBuffer(BUFSIZE, selectBuffer);
(void) glRenderMode(GL_SELECT);
glInitNames();
glPushName(0);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glGetIntegerv(GL_VIEWPORT, viewPort);
gluPickMatrix(x, y, 1.0, 1.0, viewPort);
gluPerspective(45.0, 1.0, 1.0, 1000.0);
glMatrixMode(GL_MODELVIEW);
glutSwapBuffers();
display();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
hitsNumber = glRenderMode(GL_RENDER);
glFlush();
glutPostRedisplay();
processSelectedObject(hitsNumber, selectBuffer);
}
int SubdivScene::select(int x, int y, int width, int height, float fovy, Face* f) {
GLuint buffer[SELECT_BUFFER_SIZE];
glSelectBuffer(SELECT_BUFFER_SIZE, buffer);
glRenderMode(GL_SELECT);
glInitNames();
GLint viewport[4];
glGetIntegerv(GL_VIEWPORT, (GLint*) &viewport);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
gluPickMatrix(x,y, 2, 2, (GLint*) &viewport);
gluPerspective(fovy, (GLfloat) width/height, 0.01, 100.0);
glMatrixMode(GL_MODELVIEW);
glPushName(0);
//draw the scene we will select from
if (f)
drawQuads(f);
else
drawHDS(true);
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
const GLuint hitlist = glRenderMode(GL_RENDER);
return processHits(hitlist, buffer);
}
void pickRects(AUX_EVENTREC *event)
{
GLuint selectBuf[BUFSIZE];
GLint hits;
GLint viewport[4];
int x, y;
x = event->data[AUX_MOUSEX];
y = event->data[AUX_MOUSEY];
glGetIntegerv (GL_VIEWPORT, viewport);
glSelectBuffer (BUFSIZE, selectBuf);
(void) glRenderMode (GL_SELECT);
glInitNames();
glPushName(-1);
glMatrixMode (GL_PROJECTION);
glPushMatrix ();
glLoadIdentity ();
/* create 5x5 pixel picking region near cursor location */
gluPickMatrix ((GLdouble) x, (GLdouble) (viewport[3] - y),
5.0, 5.0, viewport);
glOrtho (0.0, 8.0, 0.0, 8.0, -0.5, 2.5);
drawRects (GL_SELECT);
glPopMatrix ();
glFlush ();
hits = glRenderMode (GL_RENDER);
processHits (hits, selectBuf);
}
void selectionDetection(int button, int state, int x, int y)
{
GLuint selectBuf[ BUFSIZE ] ;
GLint viewport[4];
if (state !=GLUT_DOWN)
return;
glGetIntegerv(GL_VIEWPORT, viewport);
glSelectBuffer(BUFSIZE, selectBuf);
(void) glRenderMode(GL_SELECT);
glInitNames();
glPushName(0);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
gluPickMatrix((GLdouble) x, (GLdouble) (viewport[3] - y), 5.0, 5.0, viewport);
gluPerspective(45.0, (GLfloat) ww/(GLfloat) wh, 1.0, 50.0);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
draw(GL_SELECT);
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glFlush();
glMatrixMode(GL_MODELVIEW);
processHits( glRenderMode(GL_RENDER),selectBuf, button);
}
Vector<int> GLCtrl::GLPicking::Pick(int x, int y, Callback resizeCallback, Callback paintCallback)
{
GLuint buffer[_bufferSize];
_pickPoint = Point(x, y);
glSelectBuffer(_bufferSize, buffer);
glRenderMode(GL_SELECT);
_isPicking = true;
resizeCallback();
glInitNames();
paintCallback();
_isPicking = false;
resizeCallback();
// returning to normal rendering mode
int hits = glRenderMode(GL_RENDER);
if (hits == 0)
return Vector<int>();
else
return ParseHits(buffer, hits);
}
/// returns the selected face, NULL if nothing selected
view::face* view::get_selected_face(int x, int y) {
GLuint select_buf[SELECT_BUF_SIZE];
glSelectBuffer(SELECT_BUF_SIZE, select_buf);
glRenderMode(GL_SELECT);
glInitNames();
GLdouble projection_matrix[16];
glGetDoublev(GL_PROJECTION_MATRIX, projection_matrix);
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
GLint viewport[4];
glGetIntegerv(GL_VIEWPORT, viewport);
gluPickMatrix (GLdouble(x), GLdouble(viewport[3] - y), SELECT_TOL, SELECT_TOL, viewport);
glMultMatrixd(projection_matrix);
basemesh_drawable->render_faces();
glMatrixMode(GL_PROJECTION);
glLoadMatrixd(projection_matrix);
glFlush();
GLint hits = glRenderMode(GL_RENDER);
if (hits > 0) {
int selected_face = select_buf[3];
int depth = select_buf[1];
for (int i = 1; i < hits; i++) {
if (select_buf[i*4+1] < GLuint(depth)) {
selected_face = select_buf[i*4+3];
depth = select_buf[i*4+1];
}
}
return (face*)selected_face;
}
return NULL;
}
int
__glXDisp_SelectBuffer(__GLXclientState * cl, GLbyte * pc)
{
__GLXcontext *cx;
GLsizei size;
int error;
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
}
pc += __GLX_SINGLE_HDR_SIZE;
size = *(GLsizei *) (pc + 0);
if (cx->selectBufSize < size) {
cx->selectBuf = (GLuint *) realloc(cx->selectBuf,
(size_t) size * __GLX_SIZE_CARD32);
if (!cx->selectBuf) {
cl->client->errorValue = size;
return BadAlloc;
}
cx->selectBufSize = size;
}
glSelectBuffer(size, cx->selectBuf);
cx->hasUnflushedCommands = GL_TRUE;
return Success;
}
void
pickRects(int button, int state, int x, int y)
{
GLuint selectBuf[BUFSIZE];
GLint hits;
GLint viewport[4];
if (button != GLUT_LEFT_BUTTON || state != GLUT_DOWN)
return;
glGetIntegerv(GL_VIEWPORT, viewport);
glSelectBuffer(BUFSIZE, selectBuf);
(void) glRenderMode(GL_SELECT);
glInitNames();
glPushName((GLuint) ~0);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
/* create 5x5 pixel picking region near cursor location */
gluPickMatrix((GLdouble) x, (GLdouble) (viewport[3] - y),
5.0, 5.0, viewport);
glOrtho(0.0, 8.0, 0.0, 8.0, -0.5, 2.5);
drawRects(GL_SELECT);
glPopMatrix();
glFlush();
hits = glRenderMode(GL_RENDER);
processHits(hits, selectBuf);
}
void mouse(int button, int state, int x, int y)
{
GLuint selectBuf[SIZE];
GLint hits;
GLint viewport[4];
if (button == GLUT_LEFT_BUTTON && state == GLUT_DOWN)
{
glGetIntegerv (GL_VIEWPORT, viewport);
glSelectBuffer (SIZE, selectBuf);
glRenderMode(GL_SELECT);
glInitNames();
glPushName(0);
glMatrixMode (GL_PROJECTION);
glPushMatrix ();
glLoadIdentity ();
/* create 5x5 pixel picking region near cursor location */
gluPickMatrix ((GLdouble) x, (GLdouble) (viewport[3] - y),
5.0, 5.0, viewport);
gluOrtho2D (-2.0, 2.0, -2.0, 2.0);
drawObjects(GL_SELECT);
glMatrixMode (GL_PROJECTION);
glPopMatrix ();
glFlush ();
hits = glRenderMode (GL_RENDER);
processHits (hits, selectBuf);
glutPostRedisplay();
}
}
static GLint
DoSelect(GLint x, GLint y)
{
GLint hits;
glSelectBuffer(MAXSELECT, selectBuf);
glRenderMode(GL_SELECT);
glInitNames();
glPushName(~0);
glPushMatrix();
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPickMatrix(x, windH - y, 4, 4, vp);
gluOrtho2D(-175, 175, -175, 175);
glMatrixMode(GL_MODELVIEW);
glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
glScalef(zoom, zoom, zoom);
glRotatef(zRotation, 0, 0, 1);
Render(GL_SELECT);
glPopMatrix();
hits = glRenderMode(GL_RENDER);
if (hits <= 0) {
return -1;
}
return selectBuf[(hits - 1) * 4 + 3];
}
int
__glXDispSwap_SelectBuffer(__GLXclientState * cl, GLbyte * pc)
{
ClientPtr client = cl->client;
__GLXcontext *cx;
GLsizei size;
__GLX_DECLARE_SWAP_VARIABLES;
int error;
REQUEST_FIXED_SIZE(xGLXSingleReq, 4);
__GLX_SWAP_INT(&((xGLXSingleReq *) pc)->contextTag);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
}
pc += __GLX_SINGLE_HDR_SIZE;
__GLX_SWAP_INT(pc + 0);
size = *(GLsizei *) (pc + 0);
if (cx->selectBufSize < size) {
cx->selectBuf = reallocarray(cx->selectBuf,
(size_t) size, __GLX_SIZE_CARD32);
if (!cx->selectBuf) {
cl->client->errorValue = size;
return BadAlloc;
}
cx->selectBufSize = size;
}
glSelectBuffer(size, cx->selectBuf);
return Success;
}
void igvInterfaz::inicia_seleccion(int TAMANO_LISTA_IMPACTOS, GLuint *lista_impactos) {
glSelectBuffer(TAMANO_LISTA_IMPACTOS, lista_impactos);
glRenderMode(GL_SELECT);
interfaz.camara.establecerSeleccion(1, 1, interfaz.ancho_ventana/2, interfaz.alto_ventana/2);
}
point mouse_pointer::draw_grid()
{
GLint x;
GLint y;
GLint block;
GLint hits;
// Set up a selection buffer
GLuint buffer[512];
gl_vector3 v1;
gl_vector3 v2;
gl_vector3 v3;
gl_vector3 v4;
point cell;
ini_manager ini_mgr;
GLint pt_size = ini_mgr.get_int("Pointer Settings", "pt_size");
memset(buffer, 0, sizeof(buffer));
// Tell OpenGL to use our array for selection
glSelectBuffer(512, buffer);
// Put OpenGL in selection mode.
glRenderMode(GL_SELECT);
glInitNames();
glPushName(0);
block = 0;
glDisable(GL_CULL_FACE);
for(y = 0; y < map_->get_size(); y += pt_size) {
for(x = 0; x < map_->get_size(); x += pt_size) {
block = x + (y * map_->get_size());
glLoadName(block);
v1 = map_->get_position(x, y);
v2 = map_->get_position(x, y + pt_size);
v3 = map_->get_position(x + pt_size, y + pt_size);
v4 = map_->get_position(x + pt_size, y);
glBegin(GL_QUADS);
glVertex3fv(v1.get_data());
glVertex3fv(v2.get_data());
glVertex3fv(v3.get_data());
glVertex3fv(v4.get_data());
glEnd();
}
}
hits = glRenderMode(GL_RENDER);
cell.set_y(-1);
cell.set_x(-1);
if(hits > 0) {
block = buffer[3];
cell.set_x((block % map_->get_size()) + (pt_size / 2));
cell.set_y(((block - cell.get_x()) / map_->get_size()) + (pt_size / 2));
}
return cell;
}
int GLWidget::faceAtPosition(const QPoint &pos)
{
const int MaxSize = 512;
GLuint buffer[MaxSize];
GLint viewport[4];
makeCurrent();
glGetIntegerv(GL_VIEWPORT, viewport);
glSelectBuffer(MaxSize, buffer);
glRenderMode(GL_SELECT);
glInitNames();
glPushName(0);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
//gluPickMatrix(GLdouble(pos.x()), GLdouble(viewport[3] - pos.y()), 5.0, 5.0, viewport);
GLfloat x = GLfloat(width()) / height();
glFrustum(-x, x, -1.0, 1.0, 4.0, 15.0);
glMatrixMode(GL_PROJECTION);
glPopMatrix();
if (!glRenderMode(GL_RENDER))
return -1;
return buffer[3];
}
static void selectObjects(void)
{
GLuint selectBuf[BUFSIZE];
GLint hits;
glSelectBuffer (BUFSIZE, selectBuf);
(void) glRenderMode (GL_SELECT);
glInitNames();
glPushName(0);
glPushMatrix ();
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
glOrtho (0.0, 5.0, 0.0, 5.0, 0.0, 10.0);
glMatrixMode (GL_MODELVIEW);
glLoadIdentity ();
glLoadName(1);
drawTriangle (2.0, 2.0, 3.0, 2.0, 2.5, 3.0, -5.0);
glLoadName(2);
drawTriangle (2.0, 7.0, 3.0, 7.0, 2.5, 8.0, -5.0);
glLoadName(3);
drawTriangle (2.0, 2.0, 3.0, 2.0, 2.5, 3.0, 0.0);
drawTriangle (2.0, 2.0, 3.0, 2.0, 2.5, 3.0, -10.0);
glPopMatrix ();
glFlush ();
hits = glRenderMode (GL_RENDER);
processHits (hits, selectBuf);
}
/******************************************************
Handle mouse events
*******************************************************/
void HandleMouse(int button,int state,int x,int y)
{
int i,maxselect = 100,nhits = 0;
GLuint selectlist[100];
if (state == GLUT_DOWN) {
glSelectBuffer(maxselect,selectlist);
glRenderMode(GL_SELECT);
glInitNames();
glPushName(-1);
glPushMatrix();
MakeCamera(TRUE,x,y);
MakeGeometry();
glPopMatrix();
nhits = glRenderMode(GL_RENDER);
if (button == GLUT_LEFT_BUTTON) {
} else if (button == GLUT_MIDDLE_BUTTON) {
} /* Right button events are passed to menu handlers */
if (nhits == -1)
fprintf(stderr,"Select buffer overflow\n");
if (nhits > 0) {
fprintf(stderr,"\tPicked %d objects: ",nhits);
for (i=0;i<nhits;i++)
fprintf(stderr,"%d ",selectlist[4*i+3]);
fprintf(stderr,"\n");
}
}
}
void gl_selectbuffer( int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[] ) {
// Retrieve memory ptr from double argument:
GLuint* ptr = (GLuint*) PsychDoubleToPtr((GLdouble) mxGetScalar(prhs[1]));
if (NULL == glSelectBuffer) mogl_glunsupported("glSelectBuffer");
glSelectBuffer((GLsizei)mxGetScalar(prhs[0]), ptr);
}