Exemplo n.º 1
0
//----------------------------------------
void ofxBox2dBody::draw() {
    
    ofPushMatrix();
    
    b2Vec2 p = body->GetPosition();
    p *= OFX_BOX2D_SCALE;
    ofTranslate(p.x, p.y);
    
    float angle = body->GetAngle();
    ofRotate(ofRadToDeg(angle));
    
    for (b2Fixture* f=body->GetFixtureList(); f; f = f->GetNext()) {
        switch (f->GetType()) {
            case b2Shape::e_circle:
            {
                b2CircleShape* shape = dynamic_cast<b2CircleShape*>(f->GetShape());
                b2Vec2 position = shape->m_p;
                float radius = shape->m_radius;
                _drawCircle(position, radius);
                break;
            }
            case b2Shape::e_polygon:
            {
                b2PolygonShape* shape = dynamic_cast<b2PolygonShape*>(f->GetShape());
                _drawPolygon(shape->m_vertices, shape->m_count);
                break;
            }
            default:
                break;
        }
    }
    
    ofPopMatrix();
}
Exemplo n.º 2
0
bool GiGraphics::drawPolygon(const GiContext* ctx, int count, 
                             const Point2d* points, bool modelUnit)
{
    if (m_impl->drawRefcnt == 0 || count < 2 || points == NULL)
        return false;
    GiLock lock (&m_impl->drawRefcnt);
    
    count = count > 0x2000 ? 0x2000 : count;
    ctx = ctx ? ctx : &(m_impl->ctx);

    bool ret = false;

    const Box2d extent (count, points);                 // 模型坐标范围
    if (!DRAW_RECT(m_impl, modelUnit).isIntersect(extent))  // 全部在显示区域外
        return false;

    if (DRAW_MAXR(m_impl, modelUnit).contains(extent))  // 全部在显示区域内
    {
        ret = _drawPolygon(ctx, count, points, true, true, true, modelUnit);
    }
    else                                                // 部分在显示区域内
    {
        PolygonClip clip (m_impl->rectDraw);
        if (!clip.clip(count, points, &S2D(xf(), modelUnit)))  // 多边形剪裁
            return false;
        count = clip.getCount();
        points = clip.getPoints();

        ret = _drawPolygon(ctx, count, points, false, true, false, modelUnit);

        int ienter = findInvisibleEdge(clip);
        if (ienter == count)
        {
            ret = _drawPolygon(ctx, count, points, false, false, true, modelUnit) || ret;
        }
        else
        {
            ret = drawPolygonEdge(PolylineAux(this, ctx), count, clip, ienter) || ret;
        }
    }

    return ret;
}