void display(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
glPushMatrix();
//TRANSLATION - Move object on X or Y axis using mouse drag + CTRL key
glTranslatef(_yposition, _xposition,0.0f);
//ZOOM - Zoom in or zoom out using mouse drag + SHIFT key
glScalef(0.5f+zoom_in,0.5f+zoom_in,0.5f+zoom_in);
//ROTATION - Rotate image along X and Y plane using mouse drag
glRotated(camera_angle_v, 1.0, 0.0, 0.0);
glRotated(camera_angle_h, 0.0, 1.0, 0.0);
v.x=0.0;v.y=0.0;v.z=-1.0;
camera();
displayBackground();
displayColumns();
displayRollerCoaster();
displayRails();
glPopMatrix();
glutSwapBuffers();
}
void View::displayBase(void){
try{
// render buttons and paper
displayPaper();
displayBackground();
displayButtons();
displaySliders();
displayCurrentColour();
// reset colours
glColor3f(1.0f, 1.0f, 1.0f);
} catch(...){
throw eFileNotFoundException();
}
}
void MapView::mapResized(QSize size)
{
displayBackground();
displayMap();
}
void PaintView::draw()
{
initSetup();
if ( m_pDoc->m_ucPainting && !isAnEvent)
{
RestoreContent(); // restore content upon refresh
}
if (m_pDoc->m_ucPainting && isAnEvent)
{
// Clear it after processing.
isAnEvent = 0;
Point source(coord.x + m_nStartCol, m_nEndRow - coord.y);
Point target(coord.x, m_nWindowHeight - coord.y);
// This is the event handler
switch (eventToDo)
{
case LEFT_MOUSE_DOWN:
m_pDoc->m_pUI->m_SizeRandButton->value(0);
m_pDoc->m_pUI->setSizeRand(FALSE);
savePreviousStrokes(); // save previous strokes before creating new strokes
RestoreContent(); // put the strokes to colour buffer (no background)
m_pDoc->m_pCurrentBrush->BrushBegin(source, target); // place the strokes to the colour buffer
SaveCurrentContent(); // save the strokes to the buffer
break;
case LEFT_MOUSE_DRAG:
RestoreContent();
m_pDoc->m_pCurrentBrush->BrushMove(source, target);
SaveCurrentContent();
break;
case LEFT_MOUSE_UP:
RestoreContent();
m_pDoc->m_pCurrentBrush->BrushEnd(source, target);
SaveCurrentContent(); // save current strokes
break;
case RIGHT_MOUSE_DOWN:
firstCoord = target;
// Implement the right mouse stroke direction here
rightClickDirectionLine = new RightClickDirectionLine(m_pDoc, "Right Click Direction Line");
rightClickDirectionLine->BrushBegin(source, target);
break;
case RIGHT_MOUSE_DRAG:
// We need to release the current content because
// each mouse drag refers to a different angle
RestoreContent();
rightClickDirectionLine->BrushMove(source, target);
break;
case RIGHT_MOUSE_UP:
RestoreContent();
rightClickDirectionLine->BrushEnd(source, target);
angle = LineBrush::DetermineAngle(firstCoord, target);
m_pDoc->setLineAngle(angle);
delete rightClickDirectionLine;
rightClickDirectionLine = NULL;
break;
default:
printf("Unknown event!!\n");
break;
}
}
// put the background on top of the stroke
// it sounds stupid, but if we want to do the other way,
// we need to make everything rbga rather than rbg
if (m_pDoc->m_ucPainting) {
displayBackground();
}
glFlush();
#ifndef MESA
// To avoid flicker on some machines.
glDrawBuffer(GL_BACK);
#endif // !MESA
}
