// draw controls point around a figure
void drawSel() {
glColor3f(0, 0, 0);
int size = figureSet.size();
Figure *f = figureSet[selected];
/* getPoint() is a virtual method: every figure has at least
two points (is at least a line) */
int *pt1 = f->getPoint(1)->getCoords();
int *pt2 = f->getPoint(2)->getCoords();
glLoadName(size+1);
drawQuad(pt1[0]-3, pt1[1]-3, pt1[0]+3, pt1[1]+3);
glLoadName(size+2);
drawQuad(pt2[0]-3, pt2[1]-3, pt2[0]+3, pt2[1]+3);
if (Triangle *t = dynamic_cast<Triangle*>(f)) { // triangle: one more point
int *pt3 = t->getPoint(3)->getCoords();
glLoadName(size+3);
drawQuad(pt3[0]-3, pt3[1]-3, pt3[0]+3, pt3[1]+3);
}
else if (Quad *q = dynamic_cast<Quad*>(f)) { // quad: two more point
int *pt3 = q->getPoint(3)->getCoords();
int *pt4 = q->getPoint(4)->getCoords();
glLoadName(size+3);
drawQuad(pt3[0]-3, pt3[1]-3, pt3[0]+3, pt3[1]+3);
glLoadName(size+4);
drawQuad(pt4[0]-3, pt4[1]-3, pt4[0]+3, pt4[1]+3);
}
}
void mouseMotion(int x, int y) {
Point *p = new Point(x, H2-y);
if ((figType == POINTER) && sel) {
Figure *f = figureSet[selected];
if (cpsel){ // the user is trying to move a control point (modify)
f->setPoint(cp - figureSet.size(), p);
}
else { // the user want to move the figure as a block (move)
// common points
int xoffset = x - ox;
int yoffset = oy - y; // openGl invert y coordinate
int *pt1 = f->getPoint(1)->getCoords();
int *pt2 = f->getPoint(2)->getCoords();
// move coordinates basing on offsets
Point *p1 = new Point(pt1[0] + xoffset, pt1[1] + yoffset);
f->setPoint(1, p1);
Point *p2 = new Point(pt2[0] + xoffset, pt2[1] + yoffset);
f->setPoint(2, p2);
if (Triangle *t = dynamic_cast<Triangle*>(f)) {
int *pt3 = t->getPoint(3)->getCoords();
Point *p3 = new Point(pt3[0] + xoffset, pt3[1] + yoffset);
t->setPoint(3, p3);
}
else if (Quad *q = dynamic_cast<Quad*>(f)) {
int *pt3 = q->getPoint(3)->getCoords();
int *pt4 = q->getPoint(4)->getCoords();
Point *p3 = new Point(pt3[0] + xoffset, pt3[1] + yoffset);
q->setPoint(3, p3);
Point *p4 = new Point(pt4[0] + xoffset, pt4[1] + yoffset);
q->setPoint(4, p4);
}
}
ox = x; // refresh coordinates
oy = y;
}
// show the figure while creating
switch(figType) {
case LINE: {
Line *l = (Line*) figureSet.back();
l->setPoint(2, p);
break;
}
case TRIANGLE: {
Triangle *t = (Triangle*) figureSet.back();
t->setTriangle(p);
break;
}
case QUAD: {
Quad *q = (Quad*) figureSet.back();
q->setQuad(p);
break;
}
}
glutPostRedisplay();
}
