Im trying to cut bodys in my world. My code is based off this. But when the new polygon shape is very small i get this error.
This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.
AL lib: (EE) alc_cleanup: 1 device not closed
Assertion failed!
Program: C:\Program Files\Java\jdk1.7.0_65\bin\java.exe
File: /var/lib/jenkins/workspace/libgdx/extensions/gdx-box2d/gdx-box2d/jni/Box2D/Collision/Shapes/b2PolygonShape.cpp, Line 158
Expression: false
Below is my code to create the new body
private void creatBody(Array<Vector2> vs){
if (vs.size >= 8){
System.out.println("Vectors = " + vs.size);
}
BodyDef bodyDef = new BodyDef();
PolygonShape shape = new PolygonShape();
FixtureDef fixtureDef = new FixtureDef();
Vector2 centre = findCentroid(vs, vs.size);
if (Float.isInfinite(centre.x) || Float.isNaN(centre.x) || (Float.isInfinite(centre.y) || Float.isNaN(centre.y))){
System.out.println("centre : " + centre.toString());
return;
}
bodyDef.type = BodyDef.BodyType.DynamicBody;
bodyDef.position.set(centre.x, centre.y);
Vector2[] v = new Vector2[vs.size];
// System.out.println("Vectors");
for (int i = 0; i < vs.size; i++) {
// System.out.println("pre : " + vs.get(i).toString());
v[i] = new Vector2(vs.get(i).x * PPM, vs.get(i).y * PPM);
v[i].sub(centre);
// System.out.println("aft : " + v[i].toString());
}
System.out.println("pre");
shape.set(v);
System.out.println("after");
fixtureDef.shape = shape;
fixtureDef.density = 1;
Body body = world.createBody(bodyDef);
body.createFixture(fixtureDef);
for (int i = 0; i<vs.size; i++) {
v[i].add(centre);
}
}
private Vector2 findCentroid(Array<Vector2> vs, int count) {
Vector2 c = new Vector2();
float area = 0.0f;
float p1X = 0.0f;
float p1Y = 0.0f;
float inv3 = 1.0f / 3.0f;
for (int i = 0; i < count; ++i) {
Vector2 p2 = vs.get(i);
Vector2 p3;
if (i + 1 < count){
p3 = vs.get(i + 1);
}else{
p3 = vs.get(0);
}
float e1X = p2.x - p1X;
float e1Y = p2.y - p1Y;
float e2X = p3.x - p1X;
float e2Y = p3.y - p1Y;
float D = (e1X * e2Y - e1Y * e2X);
float triangleArea = 0.5f*D;
area += triangleArea;
c.x += triangleArea * inv3 * (p1X + p2.x + p3.x);
c.y += triangleArea * inv3 * (p1Y + p2.y + p3.y);
}
c.x*=1.0/area;
c.y*=1.0/area;
return new Vector2(c.x * PPM, c.y * PPM);
}
And these are the vertices i got from cutting. But it crashes on these vertices So i made this peace of code to test it for easier replication.
Array<Vector2> verts = new Array<Vector2>();
verts.add(new Vector2(0.022f,0.015407243f));
verts.add(new Vector2(0.0020000006f,0.015407243f));
verts.add(new Vector2(0.022000004f,0.015f));
verts.add(new Vector2(0.0020000006f,0.015f));
creatBody(verts);
I searched for the error and what i could find is that my polygonShape is to small.
