//----------------------------------------
void ofxBox2dPolygon::triangulate(float resampleAmt, int nPointsInside) {
triangles.clear();
if(size() > 0) {
// copy over the points into a polyline
ofPolyline polyOutline;
ofPolyline newPoly;
// make sure to close the polyline and then
// simplify and resample by spacing...
setClosed(true);
if(!bIsSimplified) simplify();
newPoly = getResampledBySpacing(resampleAmt);
// save the outline...
polyOutline = newPoly;
// add some random points inside then
// triangulate the polyline...
if(nPointsInside!=-1) addRandomPointsInside(newPoly, nPointsInside);
triangles = triangulatePolygonWithOutline(newPoly, polyOutline);
clear();
// now add back into polyshape
for (int i=0; i<newPoly.size(); i++) {
addVertex(newPoly[i]);
}
}
bIsTriangulated = true;
}
//--------------------------------------------------------------
void testApp::mouseReleased(int x, int y, int button){
// This is the manual way to triangulate the shape
// you can then add many little triangles
// first simplify the shape
shape.simplify();
// save the outline of the shape
ofPolyline outline = shape;
// resample shape
ofPolyline resampled = shape.getResampledBySpacing(25);
// trangleate the shape, return am array of traingles
vector <TriangleShape> tris = triangulatePolygonWithOutline(resampled, outline);
// add some random points inside
addRandomPointsInside(shape, 255);
// now loop through all the trainles and make a box2d triangle
for (int i=0; i<tris.size(); i++) {
ofxBox2dPolygon p;
p.addTriangle(tris[i].a, tris[i].b, tris[i].c);
p.setPhysics(1.0, 0.3, 0.3);
p.setAsEdge(false);
if(p.isGoodShape()) {
p.create(box2d.getWorld());
triangles.push_back(p);
}
}
// done with shape clear it now
shape.clear();
}
//--------------------------------------------------------------
void ofApp::mouseReleased(int x, int y, int button) {
if(breakupIntoTriangles) {
// This is the manual way to triangulate the shape
// you can then add many little triangles
// first simplify the shape
shape.simplify();
// save the outline of the shape
ofPolyline outline = shape;
// resample shape
ofPolyline resampled = shape.getResampledBySpacing(25);
// trangleate the shape, return am array of traingles
vector <TriangleShape> tris = triangulatePolygonWithOutline(resampled, outline);
// add some random points inside
addRandomPointsInside(shape, 255);
// now loop through all the trainles and make a box2d triangle
for(int i=0; i<tris.size(); i++) {
auto triangle = std::make_shared<ofxBox2dPolygon>();
triangle->addTriangle(ofDefaultVertexType(tris[i].a.x,
tris[i].a.y,
0),
ofDefaultVertexType(tris[i].b.x,
tris[i].b.y,
0),
ofDefaultVertexType(tris[i].c.x,
tris[i].c.y,
0));
triangle->setPhysics(1.0, 0.3, 0.3);
triangle->create(box2d.getWorld());
polyShapes.push_back(triangle);
}
}
else {
auto poly = std::make_shared<ofxBox2dPolygon>();
poly->addVertices(shape.getVertices());
poly->setPhysics(1.0, 0.3, 0.3);
poly->triangulatePoly();
poly->create(box2d.getWorld());
polyShapes.push_back(poly);
}
// done with shape clear it now
shape.clear();
}
